manufacturing methods of surgical anvil

专利摘要:
The present invention relates to a method for making a surgical stapling anvil. The method comprises the steps of making a first anvil member and a second anvil member. The first anvil member comprises a fabric-facing surface comprising a plurality of staple forming pockets defined therein and a longitudinal cavity comprising anvil projections configured to be engaged by anvil portions of a firing member. a surgical stapling instrument. The method further comprises the steps of polishing the protrusions of the first anvil member and welding the first anvil member and the second anvil member together.
公开号:BR112019027085A2
申请号:R112019027085-0
申请日:2018-06-14
公开日:2020-07-07
发明作者:Frederick E. Shelton Iv；Jerome R. Morgan；Jason L. Harris；Gregory J. Bakos；Anil K. Nalagatla
申请人:Ethicon Llc；
IPC主号:

专利说明:

[0001] [0001] The present invention relates to surgical instruments and, in various arrangements, to surgical instruments for stapling and cutting, and staple cartridges for use with them, which are designed for stapling and cutting tissue. BRIEF DESCRIPTION OF THE DRAWINGS
[0002] [0002] Several characteristics of the modalities described here, together with their advantages, can be understood according to the description presented below, considered together with the attached drawings, as shown below:
[0003] [0003] Figure 1 is a side elevation view of a surgical system that comprises a set of handles and multiple sets of interchangeable surgical tools that can be used with it;
[0004] [0004] Figure 2 is a perspective view of one of the sets of interchangeable surgical tools of Figure 1 coupled operatively to the handle set of Figure 1;
[0005] [0005] Figure 3 is an exploded view of portions of the cable assembly and the interchangeable surgical tool assembly of Figures 1 and 2;
[0006] [0006] Figure 4 is a perspective view of another of the interchangeable surgical tool sets represented in Figure 1;
[0007] [0007] Figure 5 is a perspective view in partial cross-section of the interchangeable surgical tool set in Figure;
[0008] [0008] Figure 6 is another perspective view in partial cross-section of a portion of the interchangeable surgical tool set Figures 4 and 5;
[0009] [0009] Figure 7 is an exploded view of a portion of the interchangeable surgical tool set of Figures 4 to 6;
[0010] [0010] Figure 7A is an enlarged top view of a portion of an elastic central column assembly of the interchangeable surgical tool assembly of Figure 7;
[0011] [0011] Figure 8 is an exploded view of a portion of the interchangeable surgical tool set of Figures 4 to 7
[0012] [0012] Figure 9 is a perspective view in cross section of a portion of the surgical end actuator of the interchangeable surgical tool set of Figures 4 to 8;
[0013] [0013] Figure 10 is an exploded view of the surgical end actuator portion of the interchangeable surgical tool set shown in Figure 9;
[0014] [0014] Figure 11 is a perspective view, a side elevation view and a front elevation view of a trigger member that can be used in the interchangeable surgical tool set of Figures 4 to 10;
[0015] [0015] Figure 12 is a perspective view of an anvil that can be used in the interchangeable surgical tool set of Figures 4 to 11;
[0016] [0016] Figure 13 is a side elevation view in cross section of the anvil of Figure 12;
[0017] [0017] Figure 14 is a bottom view of the anvil of Figures 12 and 13;
[0018] [0018] Figure 15 is a side elevation view in cross section of a portion of a surgical end actuator and of a drive shaft portion of the interchangeable surgical tool set of Figure 4 with a surgical staple cartridge.
[0019] [0019] Figure 16 is a side elevation view in cross section of the surgical end actuator and a portion of the drive shaft of Figure 15 after the surgical staple cartridge has been fired during a staple firing stroke and a firing member is retracted to an initial position after the staple firing stroke;
[0020] [0020] Figure 17 is another view in lateral elevation in cross section of the surgical end actuator and a portion of the driving shaft of Figure 16 after the firing member has been completely retracted back to its initial position;
[0021] [0021] Figure 18 is a top cross-sectional view of the surgical end actuator and a portion of the drive shaft shown in Figure 15 with an uns worn surgical clamp cartridge seated properly with an elongated actuator channel. surgical end worshiper;
[0022] [0022] Figure 19 is another top cross-sectional view of the surgical end actuator of Figure 15 with a cartridge of fired surgical clips mounted thereon, which illustrates the firing member retained in a locked position;
[0023] [0023] Figure 20 is a partial cross-sectional view of portions of the anvil and the elongated channel of the interchangeable tool set of Figure. 4;
[0024] [0024] Figure 21 is an exploded side elevation view of portions of the anvil and the elongated channel of Figure 20;
[0025] [0025] Figure 22 is a rear perspective view of an anvil assembly portion of an anvil, according to at least one embodiment;
[0026] [0026] Figure 23 is a rear perspective view of an anvil assembly portion of another anvil, according to at least one embodiment;
[0027] [0027] Figure 24 is a rear perspective view of an anvil assembly portion of another anvil, according to at least one embodiment;
[0028] [0028] Figure 25 is a perspective view of an anvil according to at least one modality;
[0029] [0029] Figure 26 is an exploded perspective view of the anvil of Figure 25;
[0030] [0030] Figure 27 is an end view in cross section of the anvil of Figure 25;
[0031] [0031] Figure 28 is a perspective view of another stool according to at least one modality;
[0032] [0032] Figure 29 is an exploded perspective view of the anvil style of Figure 28;
[0033] [0033] Figure 30 is a top view of a distal end portion of the anvil body portion of the anvil of Figure 28;
[0034] [0034] Figure 31 is a top view of a distal end portion of an anvil body portion of another anvil according to at least one embodiment;
[0035] [0035] Figure 32 is an end perspective view in cross section of the anvil of Figure 31;
[0036] [0036] Figure 33 is an end perspective view in cross section of another anvil according to at least one embodiment;
[0037] [0037] Figure 34 provides a comparison between a first anvil modality and a second anvil modality;
[0038] [0038] Figure 35 is a cross-sectional view of an actuator
[0039] [0039] Figure 36 is a partial cross-sectional view of the first anvil of Figure 34 and a firing member configured to engage the first anvil;
[0040] [0040] Figure 37 is a partial elevation view of the firing member of Figure 36;
[0041] [0041] Figure 38 is an illustration showing the stress concentrations in the first anvil of Figure 34 and in the firing member of Figure 36;
[0042] [0042] Figure 39 is another illustration showing the stress concentrations in the trigger member of Figure 36;
[0043] [0043] Figure 40 is a perspective view of a firing member according to at least one embodiment;
[0044] [0044] Figure 41 is a side elevation view of the firing member of Figure 40;
[0045] [0045] Figure 42 is a front elevation view of the firing member of Figure 40;
[0046] [0046] Figure 43 is a partial perspective view of a firing member according to at least one embodiment;
[0047] [0047] Figure 44 is a partial side elevation view of the firing member of Figure 43;
[0048] [0048] Figure 45 is a partial frontal elevation view of the firing member of Figure 43;
[0049] [0049] Figure 46 is a partial perspective view of a firing member according to at least one embodiment;
[0050] [0050] Figure 47 is a partial side elevation view of the firing member of Figure 46;
[0051] [0051] Figure 48 is a partial frontal elevation view of the firing member of Figure 46;
[0052] [0052] Figure 49 is a partial perspective view of a firing member according to at least one embodiment;
[0053] [0053] Figure 50 is a partial side elevation view of the firing member of Figure 49;
[0054] [0054] Figure 51 is a partial frontal elevation view of the firing member of Figure 49;
[0055] [0055] Figure 52 is a partial perspective view of a firing member according to at least one embodiment;
[0056] [0056] Figure 53 is a partial side elevation view of the firing member of Figure 52;
[0057] [0057] Figure 54 is a partial frontal elevation view of the firing member of Figure 52;
[0058] [0058] Figure 55 is a partial perspective view of a firing member according to at least one embodiment;
[0059] [0059] Figure 56 is a partial side elevation view of the firing member of Figure 55;
[0060] [0060] Figure 57 is a partial frontal elevation view of the firing member of Figure 55;
[0061] [0061] Figure 58 is a partial perspective view of a firing member according to at least one embodiment;
[0062] [0062] Figure 59 is a partial side elevation view of the firing member of Figure 58;
[0063] [0063] Figure 60 is a partial frontal elevation view of the firing member of Figure 58;
[0064] [0064] Figure 61 is a partial perspective view of a firing member according to at least one embodiment;
[0065] [0065] Figure 62 is a partial side elevation view of the firing member of Figure 61;
[0066] [0066] Figure 63 is a partial frontal elevation view of the firing member of Figure 61;
[0067] [0067] Figure 64 is a partial perspective view of a firing member, according to at least one embodiment;
[0068] [0068] Figure 65 is a partial side elevation view of the firing member of Figure 64;
[0069] [0069] Figure 66 is another partial perspective view of the firing member of Figure 64;
[0070] [0070] Figure 67 is a partial frontal elevation view of the firing member of Figure 64;
[0071] [0071] Figure 68 is a diagram representing the energy needed to advance the firing members described here through staple firing courses;
[0072] [0072] Figure 69 is a detailed view of a lateral projection that extends from the firing member of Figure 43, schematically illustrating the interaction between the lateral projection and an anvil in a flexed condition;
[0073] [0073] Figure 70 is a detailed view of a lateral projection that extends from the firing member of Figure 58, schematically illustrating the interaction between the lateral projection and an anvil in a flexed condition;
[0074] [0074] Figure 71 is a detailed view of a lateral projection that extends from the firing member of Figure 58, schematically illustrating the interaction between the lateral projection and an anvil in another flexed condition;
[0075] [0075] Figure 72 is a perspective view of an anvil of a surgical stapling instrument comprising an anvil body and an anvil cover;
[0076] [0076] Figure 73 is an exploded view of the anvil of Figure 72;
[0077] [0077] Figure 74 is a partial cross-sectional view of a welded anvil comprising vertical welding surfaces;
[0078] [0078] Figure 75 is a partial cross-sectional view of a welded anvil that comprises horizontal welding surfaces;
[0079] [0079] Figure 76 is a partial cross-sectional view of a welded anvil comprising angled welding surfaces;
[0080] [0080] Figure 77 is a cross-sectional view of an anvil comprising an anvil body and an anvil cover, the anvil body and the anvil cover being welded together;
[0081] [0081] Figure 78 is a micrograph of a surgical staple anvil comprising a first anvil member and a second anvil member, the first anvil member and the second anvil member being welded together other;
[0082] [0082] Figure 79 is a cross-sectional view of a surgical stapling anvil comprising an anvil body and an anvil cover;
[0083] [0083] Figure 80 is a graph representing four different surgical stapling anvil arrangements subject to two different load scenarios, which include deflection and stress data for a first scenario and stress data for a second scenario;
[0084] [0084] Figure 81 is a perspective view of an anvil comprising a first anvil member and a second anvil member, the anvil members comprising a weld configuration configured to increase the total depth of the weld;
[0085] [0085] Figure 82 is a cross-sectional view of the surgical stapling anvil of Figure 81 before welding, taken along line 82-82 in Figure 81;
[0086] [0086] Figure 83 is a cross-sectional view of the surgical stapling anvil of Figure 81 taken along line 83-83 in Figure 81;
[0087] [0087] Figure 84 is a cross-sectional view of a surgical stapling anvil comprising a first anvil member and a second anvil member welded together;
[0088] [0088] Figure 85 is a partially exploded view, in partial cross section of the surgical stapling anvil of Figure 84;
[0089] [0089] Figure 86 is a cross-sectional view of a surgical stapling anvil comprising a first anvil member and a second anvil member welded together, with the anvil members comprising features interlocking;
[0090] [0090] Figure 87 is a cross-sectional view of a surgical stapling anvil comprising a first anvil member and a second anvil member welded to each other, with the anvil members comprising features interlocking;
[0091] [0091] Figure 88 is a partial view of an end actuator assembly illustrated in an open configuration;
[0092] [0092] Figure 89 is a perspective view of the end actuator set of Figure 88 illustrated in a closed configuration;
[0093] [0093] Figure 90 is a partial cross-sectional view of the end actuator assembly of Figure 88 taken along line 90-90 in Figure 88;
[0094] [0094] Figure 91 is a partial cross-sectional view of the end actuator assembly of Figure 88 taken along line 91-91 in Figure 89;
[0095] [0095] Figure 92 is a cross-sectional view of the end actuator assembly of Figure 88 taken along line 92-92 in Figure 89;
[0096] [0096] Figure 93 is a perspective view of a staple cartridge channel comprising a channel body and a channel cover welded thereto;
[0097] [0097] Figure 94 is an exploded view of the staple cartridge channel of Figure 93;
[0098] [0098] Figure 95 is a cross-sectional view of a staple cartridge channel comprising a first channel member and a second channel member welded together;
[0099] [0099] Figure 96 is a perspective view of a firing member for use with a surgical instrument, the firing member comprising a first claw coupling member and a second claw coupling member;
[0100] [0100] Figure 97 is a perspective view of another firing member for use with a surgical instrument, the firing member comprising a first claw coupling member and a second claw coupling member;
[0101] [0101] Figure 98 is a front view of the firing member of Figure 96;
[0102] [0102] Figure 99 is an elevation view of the firing member of Figure 96;
[0103] [0103] Figure 100 is a front view of the firing member of Figure 97;
[0104] [0104] Figure 101 is an elevation view of the shooting member of Figure 97;
[0105] [0105] Figure 102 is a partial elevation view of the firing member of Figure 96;
[0106] [0106] Figure 103 is a partial elevation view of the firing member of Figure 97;
[0107] [0107] Figure 104 is a cross-sectional view of a stapling system comprising the firing member of Figure 97;
[0108] [0108] Figure 105 is a cross-sectional view of a stapling system comprising the firing member of Figure 96;
[0109] [0109] Figure 106 is a partial cross-sectional view of an anvil and the firing member of the firing system of Figure 105;
[0110] [0110] Figure 107 is a partial cross-sectional view of an anvil and the firing member of the firing system of Figure 104;
[0111] [0111] Figure 108 is an analysis of the stress of the anvil of the stapling system of Figure 105;
[0112] [0112] Figure 109 is a cross-sectional perspective view of a staple-forming pocket arrangement, comprising a proximal training pocket and a distal training pocket, with each training pocket comprising a surface of formation that has an entrance zone and an exit zone, which comprise different radii of curvature;
[0113] [0113] Figure 110 is a plan view of the staple-forming pocket arrangement of Figure 109;
[0114] [0114] Figure 111 is a cross-sectional view of the staple-forming pocket arrangement of Figure 109, taken along line 111-111 in Figure 110;
[0115] [0115] Figure 112 is a cross-sectional view of the staple-forming pocket arrangement of Figure 109, taken along line 112-112 in Figure 110;
[0116] [0116] Figure 113 is a cross-sectional view of the staple-forming pocket arrangement of Figure 109, taken along line 113-113 in Figure 110;
[0117] [0117] Figure 114 is a cross-sectional view of the staple-forming pocket arrangement of Figure 109, taken along line 114-114 in Figure 110;
[0118] [0118] Figure 115 is a perspective view in cross section of a staple formation pocket arrangement, which comprises a proximal formation pocket, a distal formation pocket, and primary side walls, with each formation comprises a pair of contoured side walls;
[0119] [0119] Figure 116 is a plan view of the staple-forming pocket arrangement of Figure 115;
[0120] [0120] Figure 117 is a cross-sectional view of the clamp-forming pocket arrangement of Figure 115, taken along line 117-117 in Figure 116;
[0121] [0121] Figure 118 is a cross-sectional view of the staple-forming pocket arrangement of Figure 115, taken along line 118-118 in Figure 116;
[0122] [0122] Figure 119 is a cross-sectional view of the clamp-forming pocket arrangement of Figure 115, taken along line 119-119 in Figure 116;
[0123] [0123] Figure 120 is a cross-sectional view of the clamp-forming pocket arrangement of Figure 115, taken along line 120-120 in Figure 116;
[0124] [0124] Figure 121 represents a clamp formed with the formation pocket arrangement of Figure 115 in a fully formed configuration, the clamp being in contact with the formation pockets in an aligned state;
[0125] [0125] Figure 122 represents a clamp formed with the device
[0126] [0126] Figure 123 is a cross-sectional perspective view of a staple formation pocket arrangement comprising a proximal formation pocket and a distal training pocket;
[0127] [0127] Figure 124 is a perspective view in cross section of a portion of the staple-forming pocket arrangement of Figure 123;
[0128] [0128] Figure 125 is a plan view of the staple-forming pocket arrangement of Figure 123;
[0129] [0129] Figure 126 is a cross-sectional view of the clamp-forming pocket arrangement of Figure 123, taken along line 126-126 in Figure 125;
[0130] [0130] Figure 127 is a cross-sectional view of the clamp-forming pocket arrangement of Figure 123, taken along line 127-127 in the entry area of the distal formation pocket of Figure 125;
[0131] [0131] Figure 128 is a cross-sectional view of the clamp-forming pocket arrangement of Figure 123, taken along line 128-128 in the transition zone of the distal formation pocket in Figure 125;
[0132] [0132] Figure 129 is a cross-sectional view of the staple formation pocket arrangement of Figure 123, taken along line 129-129 in the exit area of the distal formation pocket of Figure 125;
[0133] [0133] Figure 129A is a partial negative view of a forming pocket of the staple forming pocket arrangements of Figure 123, the negative partial view comprising several slices all over.
[0134] [0134] Figure 129B is a table comprising the dimensions of the slices of Figure 129A, which are identified in Figure 129A;
[0135] [0135] Figure 129C is a cross-sectional view of the formation pocket layout of Figure 123 taken along a pocket geometry axis of the formation pocket layout of Figure 123, with various dimensions of the pocket layout training are identified therein;
[0136] [0136] Figure 130 is a cross-sectional perspective view of a staple-forming pocket arrangement, comprising a proximal-forming pocket and a distal-forming pocket;
[0137] [0137] Figure 131 is a plan view of the staple-forming pocket arrangement of Figure 130;
[0138] [0138] Figure 132 is a cross-sectional view of the staple-forming pocket arrangement of Figure 130, taken along line 132-132 in Figure 131;
[0139] [0139] Figure 133 is a cross-sectional view of the clamp-forming pocket arrangement of Figure 130, taken along line 133-133 in Figure 131;
[0140] [0140] Figure 134 is a cross-sectional view of the staple-forming pocket arrangement of Figure 130, taken along line 134-134 in Figure 131;
[0141] [0141] Figure 135 is a cross-sectional view of the staple-forming pocket arrangement of Figure 130, taken along line 135-135 in Figure 131;
[0142] [0142] Figure 135A is a partial negative view of a formation pocket of the staple forming pocket arrangements of Figure 130, the negative partial view comprising several slices taken in multiple planes along the formation pocket, which are perpendicular to a fabric-facing surface of the staple-forming pocket arrangement and to a pocket geometric axis of the staple-forming pocket arrangement;
[0143] [0143] Figure 135B is a table comprising the dimensions of the slices in Figure 135A, which are identified in Figure 135A;
[0144] [0144] Figure 135C is a cross-sectional view of the formation pocket layout of Figure 130 taken along a pocket geometry axis of the formation pocket layout of Figure 130, with various dimensions of the pocket layout training are identified therein;
[0145] [0145] Figure 136 is a perspective view in cross section of a staple formation pocket arrangement that comprises a proximal formation pocket and a distal training pocket;
[0146] [0146] Figure 137 is a plan view of the staple-forming pocket arrangement of Figure 136;
[0147] [0147] Figure 138 is a cross-sectional view of the clamp-forming pocket arrangement of Figure 136, taken along line 138-138 in Figure 137;
[0148] [0148] Figure 139 is a cross-sectional view of the staple-forming pocket arrangement in Figure 136, taken along line 139-139 in the entrance formation area of the distal-forming pocket in Figure 137 ;
[0149] [0149] Figure 140 is a cross-sectional view of the clamp-forming pocket arrangement in Figure 136, taken along line 140-140 in the entry formation zone in the distal-forming pocket in Figure 137 ;
[0150] [0150] Figure 141 is a cross-sectional view of the clamp-forming pocket of Figure 136, taken along line 141-141 in the transition zone of the clamp-forming pocket of Figure 137;
[0151] [0151] Figure 142 is a cross-sectional view of the staple-forming pocket arrangement of Figure 136, taken along line 142-142 in the outward forming area of the distal forming pocket of Figure 137;
[0152] [0152] Figure 142A is a partial negative view of a formation pocket of the staple forming pocket arrangements of Figure 136, the negative partial view comprising several slices taken in multiple planes along the formation pocket, which are perpendicular to a fabric-facing surface of the staple-forming pocket arrangement and to a pocket geometric axis of the staple-forming pocket arrangement;
[0153] [0153] Figure 142B is a table comprising the dimensions of the slices of Figure 142A, which are identified in Figure 142A;
[0154] [0154] Figure 142C is a cross-sectional view of the formation pocket layout of Figure 136 taken along a pocket geometry axis of the formation pocket layout of Figure 136, with various dimensions of the pocket layout training are identified therein;
[0155] [0155] Figure 143 is a plan view of a clamp formed with the formation pocket arrangement of Figure 130 in a fully formed configuration, the clamp being in contact with the formation pockets in a state misaligned;
[0156] [0156] Figure 144 is an elevation view of the clamp in Figure 143;
[0157] [0157] Figure 145 is a cross-section elevation view of a surgical end actuator with several components removed, representing an anvil and a staple cartridge having a plurality of staples, which additionally represents the end actuator in a closed position in which a gap of uniform fabric is defined between the staple cartridge and the anvil, and which additionally represents staples fired from the staple cartridge and formed at a uniform height by forming pockets on the anvil;
[0158] [0158] Figure 146 is a cross-sectional elevation view of a surgical end actuator with several components removed, representing an anvil and a staple cartridge having a plurality of staples, the anvil comprising a surface of staggered tissue compression, which additionally represents the end actuator in a closed position in which a variable fabric gap is defined between the staple cartridge and the anvil, and which additionally represents staples fired from the staple cartridge and formed from uniform height by forming pockets on the anvil;
[0159] [0159] Figure 147 is a cross-section elevation view of a surgical end actuator with several components removed, representing an anvil and a staple cartridge having a plurality of staples and a staggered tissue compression surface, which additionally represents the end actuator in a closed position in which a gap of variable fabric is defined between the staple cartridge and the anvil, and which additionally represents the staples fired from the staple cartridge and formed at a uniform height by training pockets on the bib;
[0160] [0160] Figure 148 is a cross-sectional elevation view of a surgical end actuator with several components removed, representing an anvil and a staple cartridge having a plurality of staples, the anvil and the staples comprise scaled tissue compression surfaces, which additionally represent the end actuator in a closed position in which a variable fabric gap is defined between the staple cartridge and the anvil, and which additionally represents the staples fired from the staple cartridge and formed at a uniform height by forming pockets on the anvil;
[0161] [0161] Figure 149 is a partial cross-sectional perspective view of a joint joint for a surgical tool set with several components removed, which represents the joint joint in a non-articulated position;
[0162] [0162] Figure 150 is a plan view in partial cross section of the articulation joint of Figure 149 in the non-articulated configuration;
[0163] [0163] Figure 151 is a plan view in cross section of the articulation joint of Figure 149 in a partially articulated configuration;
[0164] [0164] Figure 152 is a plan view in partial cross section of the articulation joint of Figure 149 in a fully articulated configuration; and
[0165] [0165] Figure 152A is a detailed view of a reinforcement feature of the articulation joint of Figure 149 in the fully articulated configuration of Figure 152.
[0166] [0166] Corresponding reference characters indicate corresponding parts through the various views. The exemplifications described herein illustrate various embodiments of the invention, in one form, and such exemplifications should not be considered to limit the scope of the invention in any way. DETAILED DESCRIPTION
[0167] [0167] The applicant for this application has the following requests
[0168] [0168] The applicant for this application holds the following US patent applications that were filed on December 21, 2016, and which are each incorporated herein by reference in their respective totalities: - US patent application no. series 15 / 386,185, entitled
[0169] [0169] The applicant for this application holds the following US patent applications that were filed on June 24, 2016, and which are each incorporated herein by reference in their respective totalities: - US patent application serial no. 15 / 191,775, entitled STAPLE CARTRIDGE COMPRISING WIRE STAPLES AND STAM-PED STAPLES; - US patent application serial number 15 / 191.807, entitled STAPLING SYSTEM FOR USE WITH WIRE STAPLES AND STAM-PED STAPLES; - US patent application serial number 15 / 191,834, entitled "STAMPED STAPLES AND STAPLE CARTRIDGES USING THE SALAM; - US patent application serial number 15 / 191,788, entitled STAPLE CARTRIDGE COMPRISING OVERDRIVEN STAPLES; and - US patent application; serial no. 15 / 191.818, entitled STAPLE CARTRIDGE COMPRISING OFFSET LONGITUDINAL STA- PLE ROWS.
[0170] [0170] The applicant for this application has the following requests
[0171] [0171] The applicant for this application holds the following patent applications that were filed on April 1, 2016 and which are each incorporated herein by reference in their respective totalities: - US patent application serial no. 15 / 089.325, entitled METHOD FOR OPERATING A SURGICAL STAPLING SYSTEM; - US patent application serial number 15 / 089,321, entitled MODULAR SURGICAL STAPLING SYSTEM COMPRISING A DISPLAY; - US patent application serial number 15 / 089,326, entitled SURGICAL STAPLING SYSTEM COMPRISING A DISPLAY INCLUDING A RE-ORIENTABLE DISPLAY FIELD; - US patent application serial number 15 / 089,263, entitled SURGICAL INSTRUMENT HANDLE ASSEMBLY WITH RECONFI- GURABLE GRIP PORTION; - US patent application serial number 15 / 089,262, entitled
[0172] [0172] The applicant for this application also holds the US patent applications identified below, which were filed on December 31, 2015, which are each incorporated herein by reference in their respective totalities. :
[0173] [0173] The applicant for this application also holds the US patent applications identified below, which were filed on February 9, 2016, which are each incorporated herein by reference in their respective totalities: - application for US patent serial number 15 / 019,220, entitled
[0174] [0174] The applicant for this application also holds the US patent applications identified below, which were filed on February 12, 2016, which are each incorporated herein by reference in their respective totalities: - US patent application serial number 15 / 043,254, entitled
[0175] [0175] The applicant for this application holds the following patent applications that were filed on June 18, 2015 and which are each incorporated by reference in their respective totalities: - patent application serial number US 14 / 742,925, entitled SURGICAL END EFFECTORS WITH POSITIVE JAW OPENING ARRANGEMENTS, now US patent application publication No. 2016/0367256; - US patent application serial number 14 / 742,941, entitled
[0176] [0176] The applicant for this application holds the following patent applications that were filed on March 6, 2015 and which are each incorporated herein by reference in their respective totalities:
[0177] [0177] The applicant for this application holds the following patent applications that were filed on February 27, 2015 and which are each incorporated by reference in their respective totalities: - patent application serial number US 14 / 633,576, entitled
[0178] [0178] The applicant for this application has the following requests
[0179] [0179] The applicant for this application holds the following patent applications that were filed on March 1, 2013 and which are each incorporated by reference in their respective totalities: - US patent application serial number 13 /782,295, entitled "ARTICULATABLE SURGICAL INSTRUMENTS WITH CONDUCTIVE PATHWAYS FOR SIGNAL COMMUNICATION", now US patent application publication No. 2014/0246471; - US patent application serial number 13 / 782,323, entitled ROTARY POWERED ARTICULATION JOINTS FOR SURGICAL INSUMENTS, now publication of US patent application No. 2014/0246472; - US patent application serial number 13 / 782,338, entitled "THUMBWHEEL SWITCH ARRANGEMENTS FOR SURGICAL INS- TRUMENTS", now publication of US patent application No.
[0180] [0180] The applicant for this application also holds the following patent applications that were filed on March 14, 2013 and which are each incorporated herein by reference in their respective totalities: - US patent application serial number 13 / 803.097, entitled "ARTICULATABLE SURGICAL INSTRUMENT COMPRISING A FLINGING DRIVE", now publication of US patent application no.
[0181] [0181] The applicant for this application also holds the following patent application that was filed on March 7, 2014 and is incorporated herein by reference in its entirety: - US patent application serial number 14 / 200.111, entitled MOTOR-DRIVEN SURGICAL CUTTING INSTRUMENT, now US patent No. 9,629,629.
[0182] [0182] The applicant for this application also holds the following patent applications that were filed on March 26, 2014 and which are each incorporated herein by reference in their respective totalities: - US patent application serial number 14 / 226,106, entitled "POWER MANAGEMENT CONTROL SYSTEMS FOR SURGICAL INSTRUMENTS", now US patent application publication No. 2015/0272582; - US patent application serial number 14 / 226,099, entitled "STERILIZATION VERIFICATION CIRCUIT", now US patent application publication 2015/0272581; - US patent application serial number 14 / 226,094, entitled "VERIFICATION OF NUMBER OF BATTERY EXCHANGE / PROCEDURE COUNT", now publication of US patent application No. 2015/0272580; - US patent application serial number 14 / 226,117, entitled "POWER MANAGEMENT THROUGH SLEEP OPTIONS OF SEGMENTED CIRCUIT AND WAKE UP CONTROL", now US patent application publication 2015/0272574; - US patent application serial number 14 / 226,075, entitled "MODULAR POWERED SURGICAL INSTRUMENT WITH DETACHA- BLE SHAFT ASSEMBLIES", now, US patent application publication 2015/0272579;
[0183] [0183] The applicant for this application also holds the following patent applications that were filed on September 5, 2014 and which are each incorporated herein by reference in their respective totalities: - US patent application serial number 14 / 479,103, entitled "CIRCUITRY AND SENSORS FOR POWERED MEDICAL DEVICE", now US patent application publication No. 2016/0066912; - US patent application serial number 14 / 479,119, entitled "ADJUNCT WITH INTEGRATED SENSORS TO QUANTIFY TISSUE COMPRESSION", now US patent application publication 2016/0066914; - US patent application serial number 14 / 478,908, entitled "MONITORING DEVICE DEGRADATION BASED ON COMPONENT EVALUATION", now, publication of US patent application No. 2016/0066910; - US patent application serial number 14 / 478,895, entitled "MULTIPLE SENSORS WITH ONE SENSOR AFFECTING A SECOND SENSOR'S OUTPUT OR INTERPRETATION", now, US patent application publication No. 2016/0066909; - US patent application serial number 14 / 479,110, entitled POLARITY OF HALL MAGNET TO DETECT MISLOADED CARTRID-GE, now, publication of US patent application No. 2016/0066915; - US patent application serial number 14 / 479,098, entitled "SMART CARTRIDGE WAKE UP OPERATION AND DATA RETENTION", now, publication of US patent application No. 2016/0066911; - US patent application serial number 14 / 479,115, entitled
[0184] [0184] The applicant for this application also holds the following patent applications that were filed on April 9, 2014 and which are each incorporated by reference in their respective totalities: - US patent application no. serial number 14 / 248,590, entitled "MOTOR DRIVEN SURGICAL INSTRUMENTS WITH LOCKABLE DUAL DRIVE SHAFTS", now US patent application publication No. 2014/0305987; - US patent application serial number 14 / 248,581, entitled
[0185] [0185] The applicant for this application also holds the following patent applications that were filed on April 16, 2013 and which are each incorporated by reference in their respective totalities: - provisional US patent application serial number 61 / 812.365, entitled SURGICAL INSTRUMENT WITH MULTIPLE FUNCTIONS PERFORMED BY A SINGLE MOTOR; - US provisional patent application serial number 61 / 812,376, entitled LINEAR CUTTER WITH POWER; - US provisional patent application serial number 61 / 812,382, entitled LINEAR CUTTER WITH MOTOR AND PISTOL GRIP; - US provisional patent application serial number 61 / 812,385, entitled SURGICAL INSTRUMENT HANDLE WITH MULTIPLE AC- TUATION MOTORS AND MOTOR CONTROL; and - US provisional patent application serial number 61 / 812,372, entitled SURGICAL INSTRUMENT WITH MULTIPLE FUNCTIONS PERFORMED BY A SINGLE MOTOR.
[0186] [0186] Numerous specific details are presented to provide a complete understanding of the structure, function, manufacturing and general use of the modalities described in the specification and illustrated in the attached drawings. Well-known operations, components and elements have not been described in detail, so as not to obscure the modalities described in the specification. The reader will understand that the modalities described and illustrated in the present invention are non-limiting examples and, therefore, it can be understood that the specific structural and functional details described in the present invention can be representative and illustrative. Variations and changes can be made to this, without deviating from the scope of the claims.
[0187] [0187] The terms "understands" (and any form of understanding, such as "understands" and "that understands"), "has" (and any form of has, such as "has" and "that has"), " includes "(and any form of includes, such as" includes "and" which includes ") and" contains "(and any form of contains, such as" contains "and" which contains ") are unrestricted linking verbs. As a result, a surgical system, device or apparatus that "comprises", "has", "includes" or "contains" one or more elements has those one or more elements, but is not limited to having only those one or more elements. Likewise, an element of a surgical system, device or apparatus that "comprises", "has", "includes" or "contains" one or more resources has those one or more resources, but is not limited to having only those one or more features.
[0188] [0188] The terms "proximal" and "distal" are used in the present invention with reference to a physician who handles the handle portion of the surgical instrument. The term "proximal" refers to the portion closest to the physician, and the term "distal" refers to the portion located opposite the physician. It will also be understood that, for a question
[0189] [0189] Various devices and exemplary methods are provided for performing laparoscopic and minimally invasive surgical procedures. However, the reader will readily understand that the various methods and devices described in the present invention can be used in a number of surgical procedures and applications, including, for example, in relation to open surgical procedures. With the advancement of this Detailed Description, the reader will also understand that the various instruments described here can be inserted into a body in any way, such as through a natural orifice, through an incision or perforation formed in tissue , etc. Functional portions or portions of the instrument's end actuator can be inserted directly into a patient's body or can be inserted via an access device that has a working channel through which the end actuator and the shaft elongated actuation of a surgical instrument can be advanced.
[0190] [0190] The surgical stapling system can comprise a drive shaft and an end actuator that extends from the drive shaft. The end actuator comprises a first jaw and a second jaw. The first claw comprises a staple cartridge. The staple cartridge is insertable into, and removable from, the first jaw; however, other modes are provided for in which a staple cartridge is not removable, or at least readily replaceable, from the first gripper. The second claw comprises an anvil configured to deform the ejected clips.
[0191] [0191] The staple cartridge comprises a cartridge body. The cartridge body includes a proximal end, a distal end, and a platform that extends between the proximal end and the distal end. In use, the staple cartridge is positioned on the first side of the fabric to be stapled and the anvil is positioned on the second side of the fabric. The anvil is moved towards the staple cartridge to compress and secure the fabric against the platform. After that, the staples removably stored in the cartridge body can be implanted in the fabric. The cartridge body includes staple cavities defined therein, the staples are removably stored in the staple cavities. The staple cavities are arranged in six longitudinal rows. Three rows of staple cavities are positioned on a first side of a longitudinal slot and three rows of staple cavities are positioned on a second side of the longitudinal gap. Other arrangements of staple cavities and staples may be possible.
[0192] [0192] The clamps are supported by clamp actuators on the cartridge body. The actuators are movable between a first position, or non-triggered position, and a second position, or position
[0193] [0193] In addition to the above, the slider is moved distally by a firing member. The firing member is configured to contact the slide and push the slide towards the distal end. The longitudinal slot defined in the cartridge body is configured to receive the firing member. The anvil also includes a slot configured to receive the firing member. The firing member also comprises a first cam that engages with the first claw and a second cam that engages with the second claw. As the firing member is advanced distally, the first cam and the second cam can control the distance, or fabric gap, between the staple cartridge platform and the anvil. The firing member also comprises a knife configured to make an incision in the tissue captured between the anvil and the staple cartridge. It is desirable for the knife to be positioned at least partially proximal to the inclined surfaces, so that the clamps are ejected in front of the knife.
[0194] [0194] Figure 1 depicts a motor-driven surgical system that can be used to perform a variety of different surgical procedures. As can be seen in that figure, an example of surgical system 10 includes four interchangeable surgical tool sets 100, 200, 300 and 1000 that are adapted for interchangeable use with a handle set 500. Each interchangeable surgical tool set 100, 200, 300 and 1000 can be designed for use in connection with the performance of one or more specific surgical procedures. In another type of surgical system, interchangeable surgical tool sets can be effectively employed with a tool drive set from a robotically controlled or automated surgical system. For example, the surgical instrument sets described here can be used with various robotic systems, instruments, components and methods such as those described in US patent No. 9,072,535, but not limited to them, entitled SURGICAL STA-
[0195] [0195] Figure 2 illustrates a shape of an interchangeable surgical tool set 100 that is operationally coupled to the handle assembly 500. Figure 3 illustrates the attachment of the interchangeable surgical tool assembly 100 to the handle assembly 500. The arrangement and fixation process shown in Figure 3 can also be used in connection with the attachment of any of the interchangeable surgical tool sets 100, 200, 300 and 1000 to a tool drive portion or housing. activation of a robotic system tool. The cable assembly 500 may comprise a cable compartment 502 that includes a pistol grip portion 504 that can be held and handled by the physician. As will be briefly discussed below, the cable set 500 operationally supports a plurality of drive systems, which are configured to generate and apply various control movements to the corresponding portions of the interchangeable surgical tool set 100, 200, 300 and / or 1000 that is operationally attached to it.
[0196] [0196] Now with reference to Figure 3, the cable assembly 500 may also include a frame 506 that operationally supports a plurality of drive systems. For example, structure 506 can operationally support a "first" drive system or closing drive system, generally referred to as 510, which can be used to apply closing and opening movements to the set of interchangeable surgical tool 100, 200, 300 and 1000 that is fixed or operationally coupled to the cable assembly 500. In at least one form, the closing drive system 510 may include an actuator in the form of a closing trigger 512 , supported in an articulated manner by the structure 506. This arrangement allows the closing trigger 512 to be manipulated by a doctor, so that when the doctor holds the pistol grip portion 504 of the cable assembly 500, the trigger of closing 512 can be easily rotated from an initial or "unacted" position to an "acted" position and, more particularly, to a completely compressed or fully acted position. In various forms, the closing drive system 510 additionally includes a set of closing links 514, which is pivotally coupled to the closing trigger 512 or otherwise makes an operational interface with it. As will be discussed in more detail below, the lock link assembly 514 includes a cross fixation pin 516 that facilitates attachment to a corresponding drive system in the surgical tool set. To activate the closing drive system, the physician presses the closing trigger 512 towards the 504 pistol grip portion.
[0197] [0197] In at least one way, the cable assembly 500 and the structure 506 can operationally support another drive system called in the present invention a 530 trigger drive system, which is configured to apply motion movements. trigger the corresponding portions of the interchangeable surgical tool set that is attached to it. As described in detail in US patent application publication No. 2015/0272575, the 530 trigger drive system may employ an electric motor (not shown in Figures 1 to 3) that is located in the pistol grip portion 504 of the cable set 500. In various forms
[0198] [0198] The electric motor is configured to drive axially a longitudinally movable driving member 540 in the distal and proximal directions depending on the polarity of the voltage applied to the motor. For example, when the motor is started in one direction of rotation, the longitudinally movable drive member 540 will be driven axially in the distal direction "DD". When the motor is started in the opposite direction of rotation, the longitudinally movable drive member 540 will be driven axially in the proximal direction "PD". The cable assembly 500 may include a switch 513 which can be configured to reverse the polarity applied to the electric motor by the power source 522 or to control the motor in another way. The cable assembly 500 may also include a sensor or sensors that are configured to detect the position of the drive member 540 and / or the direction in which the drive member 540 is being moved. The motor drive can be controlled by a trigger trigger 532 (Figure 1) pivotally supported on the cable assembly 500. The trigger trigger 532 can be rotated between an unacted position and an acted position. The trigger trigger 532 can be moved to the unacted position by means of a spring or other propensity arrangement so that, when the physician releases the trigger trigger 532, the trigger trigger 532 can be rotated or otherwise , returned to the unacted position by means of the spring or the propensity In at least one way, the trigger trigger 532 can be positioned "far" from the closing trigger 512, as discussed above. As discussed in US Patent Application Publication 2015/0272575, cable assembly 500 can be equipped with a trigger trigger safety button to prevent inadvertent triggering of trigger trigger 532. When closing trigger 512 is in the unacted position, the safety button is contained in the cable assembly 500, where the doctor cannot readily access the safety button and move it between a safety position, which prevents the trigger from acting trigger 532, and a trigger position from which trigger trigger 532 can be fired. When the doctor presses the closing trigger 512, the safety button and the trigger trigger 532 pivot down, where they can then be manipulated by the doctor.
[0199] [0199] In at least one form, the longitudinally movable drive member 540 may have a toothed rack formed thereon for engagement with a corresponding drive gear arrangement that interfaces with the motor. Additional details regarding those resources can be found in US patent application publication No. 2015/0272575. In at least one way, the cable assembly 500 also includes a "rescue" assembly that is configured to enable the physician to manually retract the longitudinally movable drive member 540 if the engine is disabled. The rescue set may include a lever or rescue cable set that is stored inside the cable set 500 under a removable door 550. The lever is configured to be manually pivoted in ratchet engagement with the teeth on the limb. drive 540. In this way, the doctor can manually retract drive member 540 using the rescue cable assembly to engage drive member 5400 in the proximal "PD" direction. US patent application serial number 12 / 249,117, entitled POWERED SURGICAL CUTTING AND STA-
[0200] [0200] Turning now to Figure 2, the interchangeable surgical tool set 100 includes a surgical end actuator 110 comprising a first jaw and a second jaw. In one arrangement, the first jaw comprises an elongated channel 112 which is configured to operationally support a surgical staple cartridge 116 within it. The second claw comprises an anvil 114 that is pivotally supported in relation to the elongated channel 112. The interchangeable surgical tool set 100 also includes a lockable articulated joint 120 that can be configured to release reliably end actuator 110 in a desired position in relation to an SA drive shaft. Details regarding the various constructions and the operation of the end actuator 110, the joint joint 120 and the joint lock are presented in US patent application serial number 13 / 803.086, entitled "YARTICULATABLE SURGICAL INSTRUMENT COMPRISING A FIRING DRIVE" , currently US patent application publication No. 2014/0263541, which is incorporated here, by way of reference, in its entirety. As can also be seen in Figures 2 and 3, the interchangeable surgical tool set 100 can include a proximal housing or nozzle 130 and a closure tube assembly 140 that can be used to close and / or open the anvil 114 of end actuator 110. As discussed in US Patent Application Publication No. 2015/0272575, the closing tube assembly 140 is mobilely supported on a central column 145 that supports the configured driver arrangement 147 to apply articulation movements to the surgical end actuator 110. The central column 145 is configured to, firstly, slide a trigger bar 170 inside it and, secondly, to slide the assembly closing tube 140 extending around the central column 145. In various circumstances, the central column 145 includes a proximal end that is swiveled on a ch so 150. See Figure 3. In an arrangement, for example, the proximal end of the central column 145 is attached to a dorsal bearing that is configured to be held within the chassis 150. This arrangement facilitates the swivel attachment of the central luna 145 to the chassis 150, so that the central column 145 can be selectively rotated around a geometric axis of the drive shaft SA in relation to the chassis 150.
[0201] [0201] With reference also to Figure 3, the interchangeable surgical tool set 100 includes a movable closing member 160 that is slidably supported within the chassis 150, so that the movable closing member 160 can be moved axially. in relation to the chassis 150. As can be seen in Figure 3, the closing movable member 160 includes a pair of proximally projecting hooks 162 that are configured to be attached to the fixing pin 516, which is attached to the link link assembly. closing 514 in the cable assembly 500. A segment of the proximal closing tube 146 of the closing tube assembly 140 is pivotally coupled to the closing movable member 160. In this way, when the hooks 162 are hooked on the pin 516, the actuation of the closing trigger 512 will result in axial movement of the closing movable member 160 and, finally, of the closing tube assembly 140 in the central column 145. A closing spring can be installed s on the closing tube assembly 140 and serves to propose the closing tube 140 in the proximal direction "PD", which can serve to rotate the closing trigger 512 to the unacted position when the drive shaft assembly 100 is operational- coupled to the cable assembly 500. In use, the closing tube assembly 140 is translated distally (direction DD) to close the anvil 114 in response to the action of the closing trigger 512. The closing tube assembly 140 includes a distal closing tube segment 142 which is pivotally attached to a distal end of a proximal closing tube segment 146. distal closing tube segment 142 is configured to move axially with the tube segment proximal closure 146 in relation to surgical end actuator 110. When the distal end of the distal closing tube segment 142 reaches a proximal surface or protrusion 115 on anvil 114, anvil 114 is f pivoted.
[0202] [0202] As indicated above, the interchangeable surgical tool set 100 additionally includes a firing bar 170 which is supported to perform an axial displacement within the central column of the drive shaft 145. The firing bar 170 includes a portion intermediate of the firing drive shaft that is configured to be fixed to a distal cutting portion or cutting bar that is configured for axial displacement through the surgical end actuator 110. In at least one arrangement, the surgical tool set interchangeable 100 includes a coupling assembly that can be configured to selectively and releasably couple the pivoting actuator to the firing bar 170. Further details regarding the characteristics and operation of the coupling assembly can be found in the patent application publication US No. 2014/0263541. As discussed in US Patent Application Publication No. 2014/0263541, the distal movement of the firing bar 170 can move the arrangement of the articulation trigger 147 distally and, correspondingly, the proximal movement of the firing bar 170 it can move the articulation trigger arrangement 147 proximally when the coupling assembly is in its engaged position. When the coupling assembly is in its disengaged position, the movement of the firing bar 170 is not transmitted to the arrangement of the actuator 147 and, as a result, the firing bar 170 can move regardless of the arrangement of the trigger. articulation actuator 147. The interchangeable surgical tool set 100 can also include a slip ring set that can be configured to conduct electrical energy to and / or from end actuator 110 and / or transmit signals to and / or from the end actuator
[0203] [0203] Again with reference to Figure 3, the chassis 150 has one or more tapered fastening portions 152 formed therein, which are adapted to be received inside the corresponding slot (dovetail) slots 507 formed in the interior of a distal end of the frame 506. Each slot 507 may be tapered or, in other words, may have an approximate V shape to seat the fastening portions 152 thereon. As can also be seen in Figure 3, a drive shaft fixation pin 172 is formed at the proximal end of the drive drive shaft 170. When the interchangeable surgical tool set 100 is coupled to the cable set 500, the drive shaft fixing pin 172 is received on a support ("cradile") 542 for firing drive shaft formed at the distal end of the longitudinally movable drive member 540. The surgical tool set interchangeable 100 also employs a clip system 180 to release the drive shaft assembly 100 releasably to the frame 506 of the cable assembly 500. In at least one way, the clip system 180 includes a lock member or a for-
[0204] [0204] To fix the interchangeable surgical tool set 100 to the handle set 500, a physician can position the frame 150 of the interchangeable surgical tool set 100 above or adjacent to the distal end of the frame 506, so that the portions of tapered clamps 152 formed in the chassis 150 are aligned with the slot slots 507 in the frame 506. The physician can then move the interchangeable surgical tool set 100 along a geometry axis of installation IA which is perpendicular to the geometry axis drive system to seat the tapered clamping portions 152 in operational engagement with the corresponding receiving slots 507 at the distal end of the structure
[0205] [0205] Again with reference to Figure 1, the surgical system includes four sets of interchangeable surgical tools 100, 200, 300 and 1000 that can each be effectively used with the same set of handle 500 to perform different surgical procedures . The construction of an exemplary form of the interchangeable surgical tool set 100 was briefly discussed above and is discussed in more detail in US Patent Application Publication 2014/0263541. Several details regarding the interchangeable surgical tool sets 200 and 300 can be found in the various US patent applications that have been incorporated herein by reference. Several details regarding the 1000 interchangeable surgical tool set will be discussed in more detail below.
[0206] [0206] As shown in Figure 1, each of the surgical tool sets 100, 200, 300 and 1000 includes a pair of claws, at least one of which is movable to capture, manipulate and / or secure the tissue between the two claws.
[0207] [0207] Now with respect to Figures 4 to 10, the interchangeable surgical tool set 1000 includes a surgical end actuator 1100 comprising an elongated channel 1102 that is configured to operationally support a staple cartridge 1110 inside The end actuator 1100 can additionally include an anvil 1130 which is pivotally supported in relation to the elongated channel 1102. The interchangeable surgical tool set 1000 can also include a hinge joint 1200 and a hinge lock 1210 (Figures 5 and 8 to 10), which can be configured to release the end actuator 1100 in a desired articulated position in relation to a geometrical axis of the drive shaft. Details regarding the construction and operation of the 1210 joint lock can be found at
[0208] [0208] As can be seen in Figure 10, the distal structure segment 1560 is pivotally coupled to the elongated channel 1102 by an end actuator assembly set 1230. In one arrangement, the distal end 1562 of the distal structure segment 1560 has a pivot pin 1564 formed in it, for example. The pivot pin 1564 is adapted to be pivotally received within a pivot hole 1234 formed in the pivot base portion 1232 of the end actuator mounting set 1230. The end actuator mounting set 1230 is fixed to the proximal end 1103 of the elongated channel 1102 by means of a spring pin 1108 or other suitable member. The pivot pin 1564 defines a geometric axis of articulation B-B that is transversal to the geometric axis of the drive axis SA. See Figure 4. This arrangement facilitates the pivoting displacement (that is, the articulation) of the end actuator 1100 around the geometric axis of articulation B-B in relation to the central column assembly 1500.
[0209] [0209] Still referring to Figure 10, the hinge actuator 1700 has a distal end 1702 that is configured to operationally engage the hinge lock 1210. The hinge lock 1210 includes a hinge structure 1212 which is adapted to operationally engage a drive pin 1238 in the pivot base portion 1232 of the end actuator assembly set 1230. In addition, a cross link 1237 can be connected to the drive pin 1238 and the hinge structure 1212 to assist the articulation of the 1100 end actuator. As indicated
[0210] [0210] Referring mainly to Figure 7, the interchangeable surgical tool set 1000 includes a movable closing member 1420 that is slidably supported within the chassis 1800, so that the movable closing member 1420 can be moved axially in relation to the chassis 1800. In one form, the closing movable member 1420 includes a pair of proximally projecting hooks 1421 that are configured to be attached to the fixing pin 516, which is attached to the closing link assembly 514 on cable assembly 500, as discussed above. A proximal end 1412 of a proximal closing tube segment 1410 is pivotally coupled to the
[0211] [0211] As indicated above, the illustrated interchangeable surgical tool set 1000 includes an articulated joint 1200. Other interchangeable surgical tool sets, however, may not be capable of articulation. As can be seen in Figure 10, the upper and lower protuberances 1415, 1416 protrude distally from a distal end of the proximal closing tube segment 1410 which are configured to be movably coupled to a sleeve. closing the end actuator or distal closing tube segment 1430 of the closing tube assembly 1400. As can be seen in Figure 10, the distal closing tube segment 1430 includes the upper and lower protuberances 1434 , 1436 that project proximally from a proximal end of the same. An upper double pivot link 1220 includes proximal and distal pins that engage the cor-
[0212] [0212] As mentioned above, the interchangeable surgical tool set 1000 additionally includes a firing member set 1600 that is supported to make an axial path within the center column set 1500. Firing member set 1600 includes an intermediate portion of firing drive shaft 1602, which is configured to be connected to a distal cutting portion or cutting bar 1610. The firing member assembly 1600 can also be called in the present invention a "second axis" drive "and / or a" second drive shaft set ". As can be seen in Figures 7 to 10, the intermediate portion of the firing drive axis 1602 can include a longitudinal slot 1604 at its distal end, which can be configured to receive a flap at the proximal end of the cutter bar 1610. The longitudinal slot 1604 and the proximal end of the cutter bar 1610 can be sized and configured to allow relative movement between them and can comprise a sliding joint 1612. The sliding joint 1612 can allow the portion of the axle intermediate firing drive 1602 of firing member assembly 1600 is moved to pivot end actuator 1100 without moving, or at least without moving
[0213] [0213] In addition to the above, the exchangeable tool set 1000 can include a coupling set 1620, which can be configured to selectively and releasably couple the proximal articulation drive 1700 to the firing member assembly
[0214] [0214] With reference mainly to Figure 7, the locking sleeve 1622 can comprise a cylindrical body, or at least substantially cylindrical, including a longitudinal opening 1624 defined therein, configured to receive the shooting member assembly 1600. The locking sleeve 1622 may comprise locking projections 1626, 1628 diametrically opposite inward and a locking member 1629 facing outward. Locking projections 1626, 1628 can be configured to be selectively engaged with the firing drive shaft intermediate portion 1602 of the firing member assembly 1600. More particularly, when the locking sleeve 1622 is in in its engaged position, the locking projections 1626, 1628 are positioned inside a drive notch 1605 defined in the middle portion of the trigger drive shaft 1602, so that a distal pushing force and / or a pulling force proximal can be transmitted from the firing member 1600 to the locking sleeve 1622. When the locking sleeve 1622 is in its engaged position, the second locking member 1629 is received inside a drive notch 1704 defined in the trigger. articulation 1700, so that the distal compression force and / or the proximal tensile force applied to the locking sleeve 1622 can be transmitted to the articulation driver 1700. In effect, the firing member assembly 1600, the locking sleeve 1622 and the hinge driver 1700 will move together when the locking sleeve 1622 is in its engaged position.
[0215] [0215] In the illustrated arrangement, the switch cylinder 1630 includes an L-shaped slot 1636 that extends into a distal opening 1637 in the switch cylinder 1630. The distal opening 1637 receives a transverse pin 1639 from a displacement plate
[0216] [0216] Also as shown in Figures 7 and 8, the interchangeable tool set 1000 can comprise a slip ring set 1640 that can be configured to conduct electrical energy to the end actuator 1100 and / or from and / or transmit signals to the 1100 end actuator and / or back to a microprocessor in the cable assembly or robotic system controller, for example. More details on the 1640 slip ring assembly and associated connectors can be found in US patent application Serial No. 13 / 803,086, currently US patent application publication 2014/0263541 and US patent application Serial No. 15 / 019.196, each of which has been incorporated by reference in its respective totalities as well as in US patent application Serial No. 13 / 800.067 entitled STAPLE CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM, currently publication of application for US patent serial number 2014/0263552, which is hereby incorporated by reference in its entirety. As also described in more detail in the aforementioned patent applications that have been incorporated herein, as a reference, the interchangeable surgical tool set 1000 can also comprise at least one sensor that is configured to detect the position of the cylinder switching unit 1630.
[0217] [0217] Again with reference to Figure 7, the chassis 1800 includes one or more tapered fastening portions 1802 formed therein, which are adapted to be received inside the corresponding slot cracks 507 formed inside the end portion. distal of the structure 506 of the cable assembly 500, as discussed above. As can also be seen in Figure 7, a pin for fixing the drive shaft 1605 is formed at the ends.
[0218] [0218] Several interchangeable surgical tool sets employ an 1810 locking system to releasably couple the interchangeable surgical tool set 1000 to the structure 506 of the handle set 500. In at least one way, as can be seen in Figure 7, the clamp system 1810 includes a locking member or a locking fork 1812 that is movably attached to the chassis 1800. The locking fork 1812 has a U-shape with two legs that extend spaced apart 1814 The legs 1814 each have a pivot pin formed in them which is adapted to be received in corresponding holes 1816 formed in the 1800 chassis. This arrangement facilitates the pivoting fixation of the 1812 locking fork to the 1800 chassis. The locking fork - to 1812 can include two locking pins that project proximally 1818 that are configured to be released to the corresponding detent or locking grooves 509 at the end distal to the frame 506 of the cable assembly 500. See Figure 3. In several ways, the 1812 locking fork is forced in the proximal direction by a spring or bias member 1819. The 1812 locking fork can be actuated by a locking button 1820 that is slidably mounted on an 1822 locking actuator assembly that is mounted on the 1800 chassis. The locking button 1820 can be forced in a proximal direction in relation to the 1812 locking fork. locking fork 1812 can be moved to an unlocked position by forcing the locking button 1820 in the distal direction, which also causes the locking fork 1812 to pivot out of the retaining hitch with the distal end 700 of the frame 506. When the locking fork 1812 is in locking engagement with the distal end of the frame 506, the locking pins 1818 are seated securely within the correct locking grooves or holders 509 at the distal end of frame 506.
[0219] [0219] In the illustrated arrangement, the locking fork 1812 includes at least one and, preferably, two locking hooks 1824 which are adapted to come into contact with the corresponding locking pin portions 1426 which are formed movable member of lock 1420. When locking movable member 1420 is in an unacted position, locking fork 1812 can be pivoted in a distal direction to unlock the interchangeable surgical tool set 1000 from the cable set 500. When in this position, the locking hooks 1824 do not come into contact with the locking pin portions 1426 on the closing movable member 1420. However, when the closing movable member 1420 is moved to an actuated position, the locking fork 1812 is prevented from being pivoted to an unlocked position. In other words, if the doctor tried to pivot the locking fork 1812 to an unlocked position, or, for example, if the locking fork 1812 was inadvertently raised or brought into contact in a way that could otherwise cause it to pivot distally, the locking hooks 1824 on the locking fork 1812 would come in contact with the locking pins 1426 on the closing movable member 1420 and prevent the movement of the locking fork 1812 to an unlocked position.
[0220] [0220] Still referring to Figure 10, the cutting bar 1610 can comprise a laminated strip structure that includes at least two layers of strip. Such strip layers may comprise, for example, stainless steel bands that are interconnected by, for example, welding and / or pins at their proximal ends and / or at other locations along the length of the bands. In alternative modes, the distal ends of the bands are not connected to allow the laminates or bands to spread out in relation to each other when the end actuator is hinged. Such an arrangement allows the cutter bar 1610 to be sufficiently flexible to accommodate the end actuator joint. Various laminated knife bar arrangements are described in US patent application serial number US 15 / 019,245. As can also be seen in Figure 10, an intermediate support member 1614 is employed to provide lateral support to the cutter bar 1610 as this flexes to accommodate the articulation of the 1100 surgical end actuator. More details concerning the central support and alternative bar support arrangements are presented in US patent application serial number US 15 / 019.245. As can also be seen in Figure 10, a firing member or cutting member 1620 is attached to the distal end of the cutting bar
[0221] [0221] Figure 11 illustrates a shape of a firing member 1660 that can be employed with the interchangeable surgical tool set 1000. Firing member 1660 comprises a body portion 1662 that includes a connecting element 1663 that extends proximally which is configured to be received in an opening of the correspondingly shaped connector 1614 at the distal end of the cutter bar 1610. See Figure 10. The connector 1663 can be retained within the connector opening 1614 by friction, welding and / or a suitable adhesive , for example. Referring to Figures 17, the body portion 1662 projects through an elongated slot 1104 in the elongated channel 1102 and ends in a base member 1664 that extends laterally on each side of the body portion 1662. As the member trigger 1660 is activated distally through the surgical staple cartridge 1110, the foot member 1664 moves within a passage in the elongated channel 1102 which is located under the surgical staple cartridge 1110. As can be seen in Figure 11, the firing member 1660 may also include central flaps, pins or retaining features 1680 that project laterally. As the firing member 1660 is activated distally via the surgical staple cartridge 1110, the central retaining features 1680 travel over the inner surface 1106 of the elongated channel 1102. The body portion 1662 of the firing member 1660 additionally includes a cutting edge or tissue cutting feature 1666 that is disposed between a shoulder projecting distally 1665 and a top nose portion projecting distally 1670. As can be seen in Figure 11, the limb The 1660 firing can additionally include two top flaps, pins or anvil engagement features 1665 that extend laterally. See Figures 13 and 14. As the firing member 1660 is driven distally, a top portion of the body 1662 extends through an anvil slot 1138 (Figure 14) centrally arranged and the upper anvil engaging features 1672 slide over corresponding protrusions 1136 formed on each side of the anvil slit 1134.
[0222] [0222] Again with reference to Figure 10, the firing member 1660 is configured to interface operationally with a slide 1120 that is held within the body 1111 of the surgical staple cartridge 1110. Slide 1120 is movable in a way sliding inside the staple cartridge body 1111 from a proximal starting position adjacent to the proximal end 1112 of the cartridge body 1111 to a final position adjacent to the distal end 1113 of the cartridge body 1111. The cartridge body 1111 operationally supports a plurality of clip drivers (not shown in Figure 10) that are aligned in rows on each side of a centrally arranged slot
[0223] [0223] In embodiments in which the firing member includes a fabric cutting surface, it may be desirable for the elongated drive shaft assembly to be configured so as to prevent accidental advancement of the firing member, unless a unused clamps is properly supported in the elongated channel 1102 of the surgical end actuator 1100. If, for example, there is no staple cartridge present and the firing member is advanced distally through the end actuator, the fabric would be cut, but not stapled. Similarly, if a staple cartridge used (that is, a staple cartridge in which at least some staples have already been fired) is present in the end actuator and the firing member is advanced, the fabric would be cut, but it may not be fully stapled if it were stapled. It will be recognized that such occurrences could lead to undesirable results during the surgical procedure. US patent No. 6,988,649 entitled SURGICAL STAPLING INSTRUMENT HAVING A SPENT CARTRIDGE LOCKOUT, US patent No. 7,044,352 entitled SURGICAL STAPLING INSTRUMENT HAVING A SINGLE LOCKOUT MECHANISM FOR PREVENTION OF FIRING, and US patent No. 7,380,695 titled SURGICAL STAING HA- VING A SINGLE LOCKOUT MECHANISM FOR PREVENTION OF FIRE-RING, and US patent application serial number 14 / 742,933, entitled SURGICAL STAPLING INSTRUMENTS WITH LOCKOUT ARRAN-
[0224] [0224] A "not fired", "not worn", "fresh" or "new" 1110 fastener cartridge means that the 1110 fastener cartridge has all of its latches in their "ready to be fired together" positions. The new cartridge 1110 is seated within the elongated channel 1102 and can be retained there by snap-on features on the cartridge body, which are configured to engage corresponding portions of the elongated channel by retention
[0225] [0225] Now with reference to Figures 10 and 15 to 19, the locking member of the firing member 1650 includes a movable locking member 1652 which is configured to engage the firing member 1660 by retention when a surgical staple cartridge 1110 does not. it is suitably seated within the elongated channel 1102. More specifically, the locking member 1652 comprises at least a laterally moving locking portion 1654, which is configured to engage by locking a corresponding portion of the triggering member 1660 when retaining. slide 1120 is not present inside the cartridge 1110 in its initial position. In fact, locking member 1652 employs two laterally movable locking portions 1654 in which each locking portion engages a portion that extends laterally from firing member 1660. Other locking arrangements can be used.
[0226] [0226] Locking member 1652 comprises a general U-shaped spring member with each leg laterally movable locking portion 1654 extending from a central spring portion 1653 and configured to move in late directions - represented by "L" in Figures 18 and 19. It will be understood that the term "lateral directions" refers to directions that are transversal to the geometric axis of the drive axis SA (Figure 2). The spring or locking member 1652 can be manufactured from high-strength spring steel or similar material, for example. The central spring portion 1653 is seated within a slot 1236 in the end actuator assembly set 1230. See Figure 10. As can be seen in Figures 15 to 17, each of the legs 1654 laterally movable locking portions has a distal end 1656 with a locking window 1658. When locking member 1652 is in a locked position, the central retaining feature 1680 on each side of firing member 1660 extends into the corresponding locking windows 1658 defined in locking portions 1654 to prevent the firing member from being distally, or axially, advanced.
[0227] [0227] The operation of the firing member locking system will be explained with reference to Figures 15 to 19. Figures 15 and 18 illustrate a portion of the surgical end actuator 1100 with a new, non-triggered cartridge 1110 properly installed therein. As can be seen in these Figures, 15 and 18, slide 1120 includes an unlocking feature 1126 that corresponds to each of the laterally movable locking portions 1654. An unlocking feature 1126 is provided over or extends proximally. from each of the central wedge shaped cams
[0228] [0228] Figures 16 and 17 illustrate the retraction of the firing member 1660 back to its initial position, or not triggered, after a staple firing course has been performed as discussed above. Figure 16 represents the initial re-engagement of the retention feature 1680 in its corresponding locking windows 1658. Figure 17 illustrates the retention feature in its locked position when the firing member 1660 has been fully retracted back into position.
[0229] [0229] Again with reference to Figures 13 and 14, anvil 1130 includes an elongated anvil body portion 1132 and a proximal anvil assembly portion 1150. The elongated anvil body portion 1132 includes an outer surface 1134 that defines two downwardly extending fabric stop members 1136 which are adjacent to the proximal anvil mounting portion 1150.
[0230] [0230] Returning to Figures 12 and 13, the anvil slit 1138, as well as the proximal ramp portion 1148, extends into the anvil mounting portion 1150. Put another way, the anvil slit 1138 is forks or divides the 1150 anvil mounting portion into two anvil fixing flanges 1151. The anvil fixing flanges 1151 are coupled together at their proximal ends by a connection bridge 1153. The connection bridge 1153 supports the anvil fixing flanges 1151 and can serve to make the mounting portion of the anvil 1150 more rigid than the mounting portions of other anvil arrangements that are not connected at their proximal ends. As can also be seen in Figures 12 and 14, anvil slot 1138 has a wide portion 1139 to accommodate the upper portion and the upper anvil engaging features 1632 of firing member 1660, when firing member 1660 is in its proximal position not triggered.
[0231] [0231] As can be seen in Figures 13 and 20 to 24, each of the anvil fixing flanges 1151 includes a cross-mounting hole 1156 that is configured to receive a pivot pin 1158 (Figures 10 and 20) through it. The whisker mounting portion 1150 is pivotally secured to the proximal end 1103 of the elongated channel 1102 by a pivot pin 1158 that extends through mounting holes 1107 at the proximal end 1103 of the elongated channel 1102 and the mounting hole 1156 on the anvil assembly portion 1150. This arrangement pivotably anchors the anvil 1130 to the elongated channel 1102 so that the anvil 1130 can be pivoted around its fixed axis of the anvil AA, which is transverse to the geometric axis of the axis drive system. See Figure 5. The anvil mounting portion 1150 also includes a cam surface 1152 that extends from a centralized parking area of the firing member 1154 to the outer surface 1134 of the anvil body portion 1132.
[0232] [0232] In addition to the aforementioned, the anvil 1130 is moved between an open position and closed positions by axially advancing and retracting the distal closing tube segment 1430, as further discussed below. A distal end portion of the distal closing tube segment 1430 has an internal cam surface formed on it that is configured to engage the cam surface 1552 or the cam surfaces formed on the anvil mounting portion 1150 and move the anvil 1130. Figure 22 illustrates a cam surface 1152a formed on the anvil mounting portion 1150 in order to establish a single contact path 1155a with the inner cam surface 1444, for example, over the distal closing tube segment 1430. Figure 23 illustrates a cam surface 1152b that is configured relative to the inner cam surface 1444 in the distal closing tube segment to establish two separate arched contact paths and 1155b between the surface
[0233] [0233] As the distal closing tube segment 1430 engages by cam with the anvil mounting portion 1150 of the anvil 1130, the anvil 1130 is rotated around the anvil's geometric axis AA (Figure 5), which results in the pivoting movement of the distal end of the 1133 end of the elongated body portion of the anvil 1132 towards the surgical staple cartridge 1110 and the distal end 1105 of the elongated canal 1102. When the body portion of the anvil 1132 begins rotating, it comes into contact with the tissue to be cut and stapled which is now positioned between the lower side 1135 of the elongated portion of the anvil body 1132 and the platform 1116 of the surgical staple cartridge 1110. When the body portion of the anvil anvil 1132 is compressed on the fabric, anvil 1130 can experience considerable amounts of resistive forces and / or bending loads, for example. These resistive forces are overcome as the distal closing tube 1430 continues
[0234] [0234] Figures 25 to 27 illustrate an anvil 1130 'that includes features that improve the stiffness of the anvil body and its resistance to the flexing forces that can be generated during the closing and / or firing processes. Anvil 1130 'may otherwise be identical in construction to the anvil 1130 described above except for the differences discussed in the present invention. As can be seen in Figures 25 to 27, anvil 1130 'has an elongated anvil body 1132' which has an upper body portion 1165 which has an anvil cover 1170 attached to it. The anvil cap 1170 is approximately rectangular in shape and has an outer perimeter of the cap 1172, although the anvil cap 1170 can have any suitable shape. The perimeter 1172 of the anvil cover 1170 is configured to be inserted into a correspondingly shaped opening 1137 formed in the upper body portion 1165 and positioned against the internal protruding portions that extend axially 1139 there.
[0235] [0235] Figures 28 to 30 illustrate an anvil cover 1170 which is configured to be mechanically interlocked to the anvil body 1132 'as well as welded to the upper body portion 1165. In this embodiment, a plurality of retaining formations 1182 are defined in wall 1180 of the upper body portion 1165 which defines the opening 1137. As used in this context, the term "mechanically interlocked" means that the anvil cover will remain attached to the elongated body of the anvil regardless of the orientation of the elongated body of the anvil and without any additional retention or fixation such as welding and / or adhesive, for example. Retention formations 1182 can project inwardly into opening 1137 from the wall of opening 1180, although any suitable arrangement can be used. Retention formations 1182 can be integrally formed on wall 1180 or otherwise attached to it. The retention formations 1182 are designed to frictionally engage a corresponding portion of the anvil cover 1170 'when the anvil cover 1170' is installed in opening 1137 to friction the anvil cover 1170 'in its interior. The retaining formations 1182 project into the opening 1137 and are configured to be received by friction within a correspondingly shaped hitch area 1184 formed at the outer perimeter 1172 'of the anvil cover 1170'. The retention formations 1182 only correspond to the long sides 1177 'of the anvil cover 1170' and are not provided in the portions of the wall 1180 that correspond to the distal end 1173 or the proximal end 1175 of the anvil cover 1170 '. In alternative arrangements, retaining formations 1182 can also be provided in portions of wall 1180 that correspond to the distal end 1173 and the proximal end 1175 of the anvil cover 1170 as well as its long sides
[0236] [0236] In the embodiment illustrated in Figures 28 to 30, the retention formations 1182 are equally spaced or evenly distributed along the wall portions 1180 of the anvil cover 1170 ". In alternative embodiments, the retention formations 1182 can be more densely spaced closer to the distal ends of the long sides 1177, or more densely spaced closer to the proximal ends of its long sides 1177. In other words, the spacing between these retention formations adjacent to the distal end , to the proximal end or to both the distal and proximal ends may be less than the spacing of the formations located in the central portion of the anvil cover
[0237] [0237] In the illustrated example, a weld 1178 'extends around the entire perimeter 1172' of the anvil cover 1170 '. Alternatively, weld 1178 'is located along the long sides 1177' of the anvil cap 1170 'and not at the distal end 1173 and / or on the
[0238] [0238] Figures 31 and 32 illustrate another anvil arrangement 1130 ”, which has an anvil cover 1170” attached to it. The anvil lid 1170 ”is approximately rectangular in shape and has an outer perimeter of lid 1172”; however, the 1170 ”lid can comprise any suitable configuration. The outer perimeter of the lid 1172 "is configured to be inserted into a correspondingly shaped opening 1137" in the upper portion of the body 1165 of the anvil body 1132 ", and received in internal protruding portions that extend axially 1139" and 1190 " formed there. See Figure 32. The protruding portions 1139 "and 1190" are configured to support the corresponding long sides 1177 "of the anvil cover 1170". In an alternative embodiment, the anvil cover 1170 "is slid over the internal projections 1139" and 1190 "through an opening at the distal end 1133" of the anvil body 1132 '. The anvil body 1132 ”and the anvil cover 1170” can be manufactured from metallic material that is conducive to welding. A first weld 1178 ”can extend around the entire perimeter 1172” of the anvil cover 1170 ”or it can be located only along the long sides 1177” of the anvil cover 1170 ”and not its distal end 1173” and / or proximal end. The 1178 ”weld can be continuous or discontinuous or intermittent. It will be understood that the continuous weld modality has a larger weld surface area due to the irregularly shaped perimeter of the anvil cap 1170 ”, compared to the modalities with straight perimeter sides such as the anvil caps shown in Figure 26, for example. example. In those modalities where the weld 1178 ”is discontinuous or intermittent, the welding segments can be equally distributed along the long sides 1177” of the anvil cover 1170 ”or the welding segments can be more densely spaced closer together from the distal ends of the long sides 1177 ”or more densely spaced closer to the proximal ends of the long sides 1177”. In still other arrangements, the welding segments can be more densely spaced in the central areas on the long sides 1177 ”of the anvil cover 1170”.
[0239] [0239] Still with reference to Figures 31 and 32, the anvil cover 1170 ”can be additionally welded to the anvil body 1132” by a plurality of second discreet “deep” fixing welds 1192 ”. For example, each solder 1192 "can be placed at the bottom of a corresponding hole or opening 1194" provided through the anvil cap 1170 "so that a distinct solder 1192" can be formed along the portion of the anvil body 1132 "between the protrusions 1190 "and 1139". See Figure 32. The 1192 ”welds can be equally distributed along the long sides 1177” of the anvil cover 1170 ”or the 1192” welds can be more densely spaced closer together from the distal ends of the long sides 1177 ”or more densely spaced closer to the proximal ends of the long sides 1177”. In still other provisions, the 1192 ”welds can be more densely spaced in the central areas of the long sides 1177” of anvil cover 1170 ”.
[0240] [0240] Figure 33 illustrates another anvil cover 1170 "which is configured to be" mechanically interlocked to the anvil body 1132 "as well as welded to the upper body portion 1165. In this embodiment, a tongue and groove arrangement is employed along on each 1177 ”long side of the 1170” anvil cover. In particular, a flap that extends laterally continuously or intermittently 1195 "" projects from each of the long sides 1177 "of the anvil cover 1170". Each flap 1195 ”'corresponds to an axial slot 1197” formed in the body of the anvil 1132 ”. The anvil cover 1170 ”is slid from an opening at the distal end of the anvil body 1132” 'to "mechanically" attach the anvil cover to the body of the anvil 1132 ". The flaps 1195" and slits 1197 "can be dimensioned in relation to each other to establish a sliding friction fit between them.
[0241] [0241] The anvil modalities described here with anvil caps can provide several advantages. An advantage, for example, can make the process of assembling the anvil and the firing member assembly easier. That is, the firing member can be installed through the opening in the anvil body while the anvil is attached to the elongated channel. Another advantage is that the top cover can improve the anvil's stiffness and resistance to the aforementioned bending forces that can be experienced during tissue clamping. By resisting such bending, the frictional forces normally encountered by the firing member 1660 can be reduced. In this way, the amount of firing force required to drive the firing member from its initial position to the final position on the surgical staple cartridge can also be reduced.
[0242] [0242] Figure 34 provides a side-by-side comparison of two anvils. A portion of a first anvil 2030 from an end actuator 2000 is shown in the right half of Figure 34 and a portion of a second anvil 2030 'from an end actuator 2000' is shown in the left half of Figure 34. The major - in 2030 it comprises a first longitudinal row of training pockets 2032a, a second longitudinal row of training pockets 2032b and a third longitudinal row of training pockets 2032c. The anvil 2030 further comprises a longitudinal slot 2033 which is configured to receive a firing member, such as firing member 2040, for example, as the firing member is advanced through a staple firing stroke. The first longitudinal row of training pockets 2032a is positioned between the longitudinal slot 2033 and the second longitudinal row of training pockets 2032b, and the second longitudinal row of training pockets 2032b is positioned between the first longitudinal row.
[0243] [0243] Similar to the above, the anvil 2030 comprises a first longitudinal row of forming pockets 2032a, a second longitudinal row of forming pockets 2032b and a third longitudinal row of forming pockets 2032c. The beaker 2030 'additionally comprises a longitudinal slot 2033' which is configured to receive a firing member, such as firing member 2040 ', for example, as the firing member is advanced through a firing stroke. Bobby pins. The first longitudinal file of formation pockets 2032a is positioned between the longitudinal slot 2033 'and the second longitudinal line of formation pockets 2032b, and the second longitudinal row of formation pockets 2032b is positioned between the first longitudinal row of training pockets 2032a and the third longitudinal row of training pockets 2032c. As a result, the first longitudinal row of forming pockets 2032a comprises an inner row, the third longitudinal row of forming pockets 2032c comprises an outer row, and the second longitudinal row of forming pockets 2032b comprises a middle row or intermediate.
[0244] [0244] The anvil 2030 comprises a flat, or at least substantially flat 2031 engaging surface. The forming pockets 2032a, 2032b and 2032c are defined on the flat surface
[0245] [0245] The firing member 2040 'comprises a coupling member 2042' which includes a cutting portion 2041. The cutting portion 2041 is configured and arranged to cut the captured tissue between the anvil 2030 'and a staple cartridge 2010 (Figure 35), for example. The firing member 2040 'is configured to push a slider that has distally inclined surfaces during a staple firing course. The inclined surfaces are configured to lift staple actuators inside the staple cartridge 2010 to form staples 2020 against the anvil 2030 'and eject the staples 2020 from the staple cartridge 2010. The coupling member 2042' comprises projections, or cams, 2043 'extending laterally from it, which are configured to engage the anvil 2030' during the clamp firing stroke. Referring to Figure 37, the projections 2043 'comprise longitudinally elongated bulkheads extending from the coupling member 2042'. In other embodiments, the projections 2043 'comprise a cylindrical pin that extends through the coupling member 2042'. In any case, projections 2043 'have lateral sides or flat ends, 2047 ".
[0246] [0246] The longitudinal slit 2033 'comprises side portions 2033 /' which extend laterally from a central portion 2033c ', which are configured to receive projections 2043 ". As shown in Figure 34, side portions 2033I' of longitudinal slot 2033 'has a rectangular, or at least substantially rectangular configuration, with sharp corners. Each side 2033I' of slot 2033 'comprises a long cam surface
[0247] [0247] Coupling member 2042 'additionally comprises a foot, or cam, 2044 (Figure 35) configured to engage the staple cartridge 2010, or a gripper that holds the staple cartridge 2010, during the firing stroke. Bobby pins. In addition, the projections 2043 'and the foot 2044 cooperate to position the anvil 2030' and the staple cartridge 2010 in relation to each other. When the anvil 2030 'is movable in relation to the staple cartridge 2010, the coupling member 2042' can move the anvil 2030 'to the position in relation to the staple cartridge 2010. When the staple cartridge 2010, or the claw which supports the staple cartridge 2010, is movable in relation to the anvil 2030 ', the coupling member 2042' can move the staple cartridge 2010 to the position in relation to the anvil 2030 ".
[0248] [0248] In addition to the above, the firing member 2040 comprises a coupling member 2042 that includes a cutting portion 2041. The cutting portion 2041 is configured and arranged to cut the tissue captured between the anvil 2030 and a staple cartridge 2010 (Figure 35). The firing member 2040 is configured to push a slider that has surfaces tilted distally during a staple firing stroke. The inclined surfaces are configured to lift staple actuators inside the cart
[0249] [0249] The 2033 longitudinal slit comprises 2033 side portions | which extend laterally from a central portion 2033c, which are configured to receive projections 2043. Each lateral portion 2033 | of the slot 2033 comprises a longitudinal cam surface 2035 configured to be engaged by the projections 2043 during the clamp firing stroke. Each longitudinal cam surface 2035 is defined on the top side of a projection 2037 that extends longitudinally along the slot 2033. Each longitudinal projection 2037 comprises a strip that includes a fixed end attached to the main body portion of the anvil 2030 and a free end configured to move in relation to the fixed end. In this way, each 2037 longitudinal projection can comprise a cantilever strip. As shown in Figure 34, the side portions of the longitudinal slot 2033 comprise a curved, or rounded, profile that corresponds, or corresponds at least substantially, to the curved ends 2047 of the 2043 projections.
[0250] [0250] The 2042 coupling member additionally comprises
[0251] [0251] Again with reference to Figure 34, the side portions 2033! I 'of the longitudinal slit 2033' extend a distance 2034 'from a centerline CL of the anvil 2030 ". The side portions 2033!' extend over the pockets 2032a on the anvil 2030 'or behind them. As shown in Figure 34, the lateral ends of the side portions 2033 /' are aligned with the outer edges of the pockets 2032a. views in which the lateral portions 2033 / 'extend laterally beyond the forming pockets 2032a, for example. That said, with reference to Figure 36, the projections 2037' of the anvil 2030 'are long and, in certain cases, the projections 2037 'can deflect significantly under load. In some cases, the projections 2037' can deflect downwards so that a large portion of the drive surfaces 2045 'defined at the bottom of the projections 2043' are not in contact contact with the cam surfaces 2035 ". In these cases, the contact between the projections 2043" and the cam surfaces 2035 "can be reduced to a point, such as the point 2047", for example. In some cases, the contact between the 2043 'projections and surfaces cam es
[0252] [0252] Furthermore, again with reference to Figure 34, the projections 2043 'extend over the formation pockets 2032a on the beaker 2030' or behind them. The lateral ends of the projections 2043 'extend over a longitudinal central line 2062a of the formation pockets 2032a. Other modalities are foreseen in which the lateral ends of the projections 2043 'are aligned with the longitudinal central line 2062a of the training pockets 2032a. Certain modalities are envisaged in which the lateral ends of the projections 2043 'do not extend to the longitudinal central line 2062a of the forming pockets 2032a. In any case, again with reference to Figure 36, the projections 2043 'can deflect upwards, especially when the projections 2043' are long, so that a large portion of the driving surfaces 2045 'of the projections 2043' do not is in contact with the 2035 'cam surfaces. This condition may further exacerbate the condition discussed above in relation to the 2037 'projections. That said, projections 2043 'may be able to better control the staple formation process that occurs in formation pockets 2032a, and / or formation pockets 2032b and 2032c, when projections 2043' extend to the outer edge of the training pockets 2032a or beyond, for example.
[0253] [0253] In addition to the above, projections 2037 'and projections 2043' can deflect in a way that causes the load flowing between firing member 2040 'and anvil 2030' to be applied at the ends internal projections 2037 '. As shown in Figure 36, contact points 2048 'are at or near the inner edges of projections 2037'. The deflection of the projections 2037 ', and the projections 2043', is the same or similar to that of the strips in cantilever. As the reader must appreciate, the deflection of a cantilever strip is proportional to the cube of the strip length when the load is applied to the end of the cantilever strip. In any case, gaps can be created between projections 2037 'and projections 2043' when projections 2037 'and / or projections 2043' deflect. Such gaps between portions of projections 2037 'and projections 2043' mean that the forces flowing between them will flow through very small areas that will, as a result, increase the stress and tension experienced by projections 2037 'and projections 2043 ". This interaction is represented by elevators, or concentrations, of stress 2039 'and 2049' in Figures 38 and 39 where stress elevators 2039 'are present on ridges 2037' and stress elevators 2049 'are present in interconnection between projections 2043 'and coupling member 2042'. Other elevators or concentrations of stress may be present, but, as discussed below, it is desirable to reduce or eliminate these stress elevators.
[0254] [0254] Again with reference to Figures 34 and 35, each of the side portions 2033 | the longitudinal slit 2033 extends a distance 2034 from a centerline CL of the anvil 2030. The distance 2034 is less than the distance 2034 '. However, the side portions 2033 | extend over the formation pockets 2032a on the anvil 2030 or behind them. As shown in Figure 34, the lateral ends of the side portions 2033l are not aligned with the outer edges of the training pockets 2032a. In addition, the lateral ends of the side portions 2033l do not extend beyond the outer edges of the forming pockets 2032a; however, side portions 2033 | extend over the longitudinal central lines 2062a of the training pockets 2032a. In addition to the above, the projections 2037 are shorter than the projections 2037 '. In this way, the 2037 projections will experience less deflection, stress and tension than the 2037 projections for a given force applied to them.
[0255] [0255] Other modalities are foreseen in which side portions 2033 | from slit 2033 do not extend to the longitudinal center line 2062a of training pockets 2032a. In certain embodiments, side portions 2033 | they do not extend laterally over or overlap the training pockets 2032a. Such shorter side portions 2033l, in addition to the above, can reduce deflection, stress and tension on the 2037 projections. Due to the reduced deflection of the 2037 projections, the drive surfaces 2045 defined at the bottom of the 2043 projections can remain in contact with the cam surfaces 2035 of the projections 2037. In these cases, the contact area between the projections 2043 and the cam surfaces 2035 can be increased compared to the contact area between the projections 2043 'and the surfaces of cam 2035 ".
[0256] [0256] In addition to the above, the cross-section thickness of the 2037 projections is not constant, unlike the 2037 'projections which have a constant cross-section thickness. The projections 2037 have a thickness in tapered cross section where the base of each projection 2037 is wider than its internal end due to the rounded lateral ends of the 2033I side slit portions. Such a configuration can serve to stiffen or reinforce the projections 2037 and reduce the deflection, stress and tension of the projections 2037 compared to the projections 2037 '. In at least one case, a portion of a projection 2037 is tapered, while another portion of the projection 2037 has a thickness in constant cross section. In at least one other case, the totality of a 2037 protrusion can be tapered so that none of the cross section thickness is constant.
[0257] [0257] Furthermore, again with reference to Figures 34 and 35, the projections 2043 extend over the formation pockets 2032a on the anvil 2030 or behind them. The lateral ends of the 2043 projections do not extend over the longitudinal centerline 2062a of the training pockets 2032a. Other modalities are provided in which the lateral ends of the projections 2043 are aligned with the longitudinal central line 2062a of the training pockets 2032a. Certain modalities are foreseen in which the lateral ends of the 2043 projections do not extend in any way over the training pockets 2032a. In any case, the upward deflection of the 2043 projections may be less than the 2043 'projections and, as a result, a larger contact area may be present between the actuation surfaces 2045 and the cam surfaces 2035.
[0258] [0258] In addition to the above, projections 2037 and projections 2043 can deflect in a way that causes the charge flowing between the firing member 2040 and anvil 2030 to be applied laterally along the lengths of projections 2037 instead of at a single point and / or at the end of the 2037 projections. As a result, the forces flowing between them will flow through larger areas that will, as a result, reduce the stress and tension experienced by the 2037 projections and 2043 projections. , which can reduce or eliminate the stress elevators discussed above in relation to projections 2037 'and projections 2043', for example.
[0259] [0259] Again with reference to Figure 35, the foot 2044 of the coupling member 2042 is wider than the projections 2033. Otherwise, the lateral width of the foot 2044 is wider than the width between the lateral ends of the 2033 projections. In such cases, the 2044 foot can deflect or tension more than the projections and, as a result, the deflection of the 2033 projections can be reduced. Alternative modalities are foreseen in which the lateral width of the foot 2044 is equal to or less than the width between the lateral ends of the projections 2033; however, these modalities can be configured in another way to provide the desired deflection and / or tension within the 2033 projections.
[0260] [0260] As discussed above, an end actuator may comprise an anvil, which is movable between an open position and a closed position. In some cases, the anvil is moved towards its closed position by a firing member, such as firing member 2040 or 2040 ', for example, when the firing member is moved distally. In other cases, the anvil is moved towards its closed position before the firing member is advanced distally to perform a staple firing stroke. In any case, the anvil may not move to its fully closed position until the firing member approaches or reaches the end of its staple firing stroke. As a result, the anvil is progressively closed by the firing member. In at least one of these cases, the anvil may progressively close due to the thick tissue captured between the anvil and the staple cartridge. In some cases, the anvil can actually deflect or deform during the firing stroke of staples of the firing member. Such circumstances are generally controlled, however, by the upper projections and the lower leg of the firing member.
[0261] [0261] Turning now to Figure 37, the drive surfaces 2045 'defined in projections 2043' are flat, or at least substantially flat. In addition, the driving surfaces 2045 'are configured to intermittently engage the flat, or at least substantially flat, cam surfaces 2035' defined on the anvil 2030 'when the anvil 2030' is in a completely closed position . In other words, drive surfaces 2045 'engage cam surfaces 2035' in a face-to-face relationship when anvil 2030 'is in a completely flat orientation. A flat orientation of the anvil 2030 'is shown in dashed line in Figure 37. In such cases, the driving surfaces 2045' are parallel, or at least substantially parallel, to the longitudinal path of the firing member 2040 'during the stroke. staple firing. As discussed above, however, the anvil 2030 'may progressively close during the firing stroke and, as a result, the anvil 2030' may not always be in a completely closed position. As a result, drive surfaces 2045 'may not always be aligned with cam surfaces 2035' and, in such cases, projections 2043 'may extend into the protrusions 2037' of the anvil 2030. Figure 37 represents such cases with continuous lines.
[0262] [0262] In addition to the above, the driving surfaces 2045 'of the projections 2043' and / or the cam surfaces 2035 'defined on the projections 2037' may deform plastically if the firing member 2040 'has to progressively close the anvil 2030 'to its completely closed position. In certain cases, the cam surfaces 2035 'may suffer friction, for example, which can increase the force required to complete the clamp firing stroke. More specifically, the plastic deformation of the projections 2043 'and / or the protrusions of the anvil 2037' can cause energy losses as the metal is deformed beyond the plastic limits. At this point, friction occurs and the friction coefficient of the coupling increases substantially. Energy losses can be in the range of about 10% to 30%, for example, which can increase the force required to fire the firing member by around 10% to 30%. In addition, the force required to complete the subsequent clamp firing strokes with the end actuator 2000 'may increase in such cases if the end actuator 2000' is reused.
[0263] [0263] Now with reference to Figures 40 to 42, a firing member 2140 comprises a firing bar and a coupling member 2142 attached to the firing bar. Coupling member 2142 comprises a connector 2148 that connects coupling member 2142 to the firing bar. Coupling member 2142 further comprises a cutting member 2041 configured to cut a patient's tissue during a staple firing course. Coupling member 2142 also comprises projections 2143 configured to engage an anvil, such as the 2030 or 2030 'anvil, for example, and in addition, a foot 2144 configured to engage a staple cartridge jaw during the firing stroke. of staples. Each projection 2143 comprises a drive surface 2145 defined on the underside thereof. Each projection 2143 further comprises a cam transition extending proximally 2147 and a radiated transition 2149 extending around the perimeter of projection 2143. Coupling member 2142 further comprises intermediate projections 2146 extending laterally from which are configured to prevent the trigger member 2140 from executing the staple trigger course when an unused staple cartridge is not positioned in front of the trigger member 2140 at the start of the trigger course. stop staples.
[0264] [0264] In addition to the above, the driving surfaces 2145 of the projections 2143 are not parallel to the longitudinal path 2160 of the firing member 2140. Instead, the driving surfaces 2145 extend transversely to the longitudinal path 2160. In at least one case, the distal end of each drive surface 2145 is positioned farther from the longitudinal path 2160 than the proximal end. Such an arrangement can reduce or eliminate the problems described above in relation to the progressive closure of the anvil 2130. More specifically, in at least one case, if the anvil 2130 moves through a range of motion between about 4 degrees and about The degree in relation to the longitudinal path 2160 during progressive closing, so the drive surface 2145 could be oriented at about 2 degrees in relation to the longitudinal path 2160, for example, which represents the midpoint in the closing range progressive. Other modalities are possible. For example, if the anvil 2130 moves through a range of motion between about 1 degree and about 0 degree in relation to the longitudinal path 2160 during progressive closing, then the driving surfaces 2145 could be oriented by about 1 degree in relation to the longitudinal path 2160, for example, which represents the upper limit in the progressive closing range. In several cases, the firing member 2140 may be necessary to progressively close the anvil 2130 through a range of 5 degrees of movement, for example. In other cases, the firing member 2140 may be necessary to progressively close the anvil 2130 through a range of 10 degrees of movement, for example. In some cases, the anvil 2130 may not reach its completely closed position and, as a result, the progressive closure of the anvil 2130 may not reach O degree.
[0265] [0265] In addition to the above, the driving surface 2145 of the projection 2143 is not parallel to the driving surface of the foot
[0266] [0266] The examples provided above were discussed in relation to a movable anvil; however, it must be understood that the teachings of such examples could be adapted to any suitable movable jaw, such as a movable staple cartridge jaw, for example. Similarly, the examples provided elsewhere in this order can be adapted to any mobile grapple.
[0267] [0267] Now with reference to Figures 43 to 45, a firing member 2240 comprises a firing bar and a coupling member 2242 attached to the firing bar. Coupling member 2242 comprises a connector 2148 that connects coupling member 2242 to the firing bar. Coupling member 2242 further comprises a cutting member 2041 configured to cut a patient's tissue during a staple firing course. Coupling member 2242 also comprises projections 2243 configured to engage an anvil, such as the 2030 or 2030 'anvil, for example, and in addition, a foot 2144 configured to engage a staple cartridge jaw during the firing stroke. of staples. Each projection 2243 comprises a drive surface 2245 defined on the underside thereof. Each projection 2243 additionally comprises a radiated transition 2249 that extends around its perimeter. Coupling member 2242 additionally comprises intermediate projections 2146 extending laterally from it, which are configured to prevent trigger member 2240 from executing the staple firing stroke when an unused staple cartridge is not positioned in front of firing member 2240 at the start of the staple firing stroke.
[0268] [0268] In addition to the above, each projection 2243 comprises an initial or proximal end 2251 configured to engage the anvil and, in addition, an end end. The starting end of each projection 2243 is different from the rear or rear end of the projection 2243. The front end 2251 comprises a radius that extends from the bottom drive surface 2245 of the projection 2243 to a location positioned above a longitudinal center line. 2250 of projection 2243. The front end 2251 comprises a single radius of curvature; however, the front end 2251 may comprise more than one radius of curvature. Each projection 2243 further comprises a radiated edge 2259 between the radiated front end 2251 and the top surface of the projection
[0269] [0269] Now with reference to Figures 46 to 48, a firing member 2340 comprises a firing bar and a coupling member 2342 attached to the firing bar. Coupling member 2342 comprises a connector 2148 that connects coupling member 2342 to the firing bar. Coupling member 2342 further comprises a cutting member 2041 configured to cut a patient's tissue during a staple firing course. Coupling member 2342 also comprises projections 2343 configured to engage an anvil, such as the 2030 or 2030 'anvil, for example, and in addition, a foot 2144 configured to engage a staple cartridge jaw during the firing stroke. of staples. Each 2343 projection comprises a drive surface defined on the underside thereof. Each projection 2343 further comprises a radiated transition 2349 that extends around its perimeter. Coupling member 2342 additionally comprises intermediate projections 2146 extending laterally from it, which are configured to prevent trigger member 2340 from executing the staple firing stroke when an unused staple cartridge is not positioned in front of firing member 2340 at the start of the staple firing stroke.
[0270] [0270] In addition to the above, each projection 2343 comprises a radiated anterior end 2351. The anterior end 2351 is similar to the anterior end 2251 and comprises a curved surface that extends through the center line 2350 of the 2343 projection. 2251 has a different configuration from the rear end of the 2243 projection. Each 2343 projection additionally comprises a side or side end 2352. Each end
[0271] [0271] Now with reference to Figures 49 to 51, a firing member 2440 comprises a firing bar and a coupling member 2442 attached to the firing bar. Coupling member 2442 comprises a connector 2148 that connects coupling member 2442 to the firing bar. Coupling member 2442 additionally comprises a cutting member 2041 configured to cut a patient's tissue during a staple firing course. Coupling member 2442 also comprises projections 2443 configured to engage an anvil, such as the 2030 or 2030 'anvil, for example, and in addition, a foot 2144 configured to engage a staple cartridge jaw during the firing stroke. of staples. Each projection 2443 comprises a drive surface 2445 defined on the underside thereof. Each projection 2443 additionally comprises a radiated transition that extends around its perimeter. Coupling member 2442 further comprises intermediate projections 2146 extending laterally therewith, which are configured to prevent trigger member 2440 from executing the staple firing stroke when an unused staple cartridge is not positioned in front of firing member 2440 at the start of the staple firing stroke.
[0272] [0272] In addition to the above, the lateral sides, or ends, of each 2443 projection are defined by more than one radius of curvature. Each projection 2443 comprises a first radius of curvature 2447a extending from the bottom drive surface 2445 and a second radius of curvature 2447b extending from the top surface of projection 2443. The second radius of curvature 2447a is different from the second radius of curvature 2447b. For example, the first radius of curvature 2447a is greater than the second radius of curvature 2447b; however, curvatures 2447a and 2447b can comprise any suitable configuration. Referring mainly to Figure 51, the first radius of curvature 2447a extends upward beyond a center line 2450 of projection 2443.
[0273] [0273] Now with reference to Figures 52 to 54, a firing member 2540 comprises a firing bar and a coupling member 2542 attached to the firing bar. Coupling member 2542 comprises a connector 2148 that connects coupling member 2542 to the firing bar. Coupling member 2542 further comprises a cutting member 2041 configured to cut a patient's tissue during a staple firing course. Coupling member 2542 also comprises projections 2543 configured to engage an anvil, such as the 2030 or 2030 'anvil, for example, and in addition, a foot 2144 configured to engage a staple cartridge jaw during the firing stroke. of staples. Each projection 2543 comprises a drive surface defined on the underside thereof. Each 2543 projection additionally comprises a radiated transition that extends around its perimeter. Coupling member 2542 additionally comprises intermediate projections 2146 extending laterally from it, which are configured to prevent trigger member 2540 from executing the staple firing stroke when an unused staple cartridge is not positioned in front of firing member 2540 at the start of the staple firing stroke.
[0274] [0274] In addition to the above, each projection 2543 comprises a side or lateral end 2552 that is flat, or at least substantially flat. Each projection 2543 further comprises a radiated transition 2547 that extends around the side end 2552. Each projection 2543 is symmetric, or at least substantially symmetrical, around a longitudinal center line that extends through the side end 2552. In addition in addition, the top surface and the bottom surface of each projection 2543 are parallel to each other.
[0275] [0275] Referring mainly to Figure 53, the front end 2551 of each projection 2543 is positioned distally in relation to a cutting edge 2042 of the cutting portion 2041. The posterior end 2559 of each projection 2543 is positioned in po - proximal position in relation to the cutting edge 2042. As a result, projections 2043 cover cutting edge 2042 longitudinally. In these cases, the firing member 2540 can attach the anvil and staple cartridge directly to the location where the fabric is being cut.
[0276] [0276] Now with reference to Figures 55 to 57, a firing member 2640 comprises a firing bar and a coupling member 2642 attached to the firing bar. Coupling member 2642 comprises a connector 2148 that connects coupling member 2642 to the firing bar. Coupling member 2642 further comprises a cutting member 2041 configured to cut a patient's tissue during a staple firing course. Coupling member 2642 also comprises projections 2643 configured to engage an anvil, such as the 2030 or 2030 'anvil, for example, and in addition, a foot 2144 configured to engage a staple cartridge jaw during the firing stroke. of staples. Each projection 2643 comprises a drive surface 2645 defined on the underside thereof. Each projection 2643 additionally comprises a radiated transition 2649 that extends around its perimeter. Coupling member 2642 additionally comprises intermediate projections 2146 extending laterally from it, which are configured to prevent trigger member 2640 from executing the staple firing stroke when an unused staple cartridge is not positioned in front of firing member 2640 at the start of the staple firing stroke.
[0277] [0277] In addition to the above, each projection 2643 additionally comprises a side end 2652, a bottom drive surface 2645 and a top surface 2647. The bottom drive surface 2645 is flat and parallel to the firing path. 2660 of firing member 2660. Referring mainly to Figure 57, the top surface 2647 is flat, but does not parallel the longitudinal firing path 2660. In addition, the top wall 2647 is not parallel to the bottom wall 2645. As a result, each projection 2643 is asymmetrical. In fact, the orientation of the top surface 2647 displaces the moment of inertia of the projection 2643 above the lateral end 2652. Such an arrangement can increase the flexural stiffness of the projections 2643, which can reduce the deflection of the projections
[0278] [0278] Now with reference to Figures 58 to 60, a firing member 2740 comprises a firing bar and a coupling member 2742 attached to the firing bar. Coupling member 2742 comprises a connector 2148 that connects coupling member 2742 to the firing bar. Coupling member 2742 further comprises a cutting member 2041 configured to cut a patient's tissue during a staple firing course. Coupling member 2742 also comprises projections 2743 configured to engage an anvil, such as the 2030 or 2030 'anvil, for example, and in addition, a foot 2144 configured to engage a staple cartridge jaw during the firing stroke. of staples. Each 2743 projection comprises a drive surface defined on the underside thereof. Coupling member 2742 additionally comprises intermediate projections 2146 extending laterally from it, which are configured to prevent firing member 2740 from executing the staple firing stroke when an unused staple cartridge is not positioned in front of firing member 2740 at the start of the staple firing stroke.
[0279] [0279] In addition to the above, each projection 2743 comprises a first portion, or anterior portion 2753a, and a second portion, or posterior portion, 2753b positioned distally behind the anterior portion 2753a. The anterior portion 2753a comprises a curved guide surface on the surface 2751 defined at the distal end thereof, which is configured to engage the whisker initially. The front portion 2753a further comprises a first front or drive surface 2745a defined on its underside. Similarly, the rear portion 2753b comprises a second rear or drive surface 2745b defined on its underside. Each projection 2743 further comprises a transition 2752 defined between the front portion 2753a and the back portion 2753b.
[0280] [0280] As the firing member 2740 is advanced distally, in addition to the above, the driving surfaces 2745a and 2745b can cooperate to engage and position the anvil. In certain embodiments, the driving surfaces 2745a and 2745b define a driving plane that is parallel, or at least substantially parallel, to the longitudinal path 2760 of the firing member
[0281] [0281] In other embodiments, with reference to Figures 69 and 71, the front drive surface 2745a is positioned above the rear drive surface 2745b. In other words, the front drive surface 2745a is positioned farther from the longitudinal path 2760 than the rear drive surface 2745b so that both drive surfaces 2745a and 2745b remain in contact with the anvil during clamp firing stroke. In at least one case, the driving surfaces 2745a and 2745b can define a driving plane that is transversal to the longitudinal path 2760. In certain cases, an angle of 1 degree, for example, can be defined between the driving plane. - to and the longitudinal path 2760. In several cases, the front drive surface 2745a is positioned vertically above the rear drive surface 2745b by approximately 0.001 ", for example. In other embodiments, the front drive surface 2745a it is positioned vertically above the rear 2745b drive surface by approximately 0.002 ", for example. In certain cases, the front drive surface 2745a is positioned above the rear drive surface 2745b by a distance that is between about 0.001 "and about 0.002", for example.
[0282] [0282] In certain cases, again with reference to Figure 70, only the driving surfaces posterior 2745b can be in contact with the cam surfaces of the anvil when the firing member 2740 progressively closes the anvil. In such cases, the front drive surfaces 2745a are not in contact with the cam surfaces of the anvil. Such an arrangement can reduce the plastic deformation of the 2743 projections and reduce the force required to advance the firing member 2740 distally compared to when only the front drive surfaces 2745a are in contact with the cam surfaces of the anvil. When the anvil begins to flex due to the staple forming load being applied to the anvil, in some cases, the anvil may flex upwards in contact with the anterior driving surfaces 2745a, as shown in Figure 71.
[0283] [0283] The anterior portion 2753a is thicker than the posterior portion 2753b. In other words, the anterior portion 2753a has a greater moment of flexion inertia than the posterior portion 2753b which can resist the upward bending of the projection 2743. As a result, the posterior portion 2753b may deflect upward more than the previous 2753a. In such cases, it is more likely that both portions 2753a and 2753b of the projections 2743 can remain in contact with the anvil during the staple firing stroke even though the firing member 2740 is being used to progressively close the anvil. In addition, the anterior portion 2753a also has a greater shear thickness than the posterior portion 2753b which can better resist the shear forces transmitted through the 2743 projections. The anterior portion 2753a is often exposed to greater shear forces than the anterior portion 2753b and, as a result, can benefit from the greater shear thickness. If it is believed that the posterior portion 2753b may experience greater shear forces than the anterior projection 2753a, then the posterior portion 2753b may have a greater shear thickness than the anterior portion 2753a, for example.
[0284] [0284] Now with reference to Figures 61 to 63, a firing member 2840 comprises a firing bar and a coupling member 2842 attached to the firing bar. Coupling member 2842 comprises a connector 2148 that connects coupling member 2842 to the firing bar. Coupling member 2842 further comprises a cutting member 2041 configured to cut a patient's tissue during a staple firing course. Coupling member 2842 also comprises projections configured to engage an anvil, such as anvil 2030 or 2030 ', for example, and, in addition, a foot 2144 configured to engage a staple cartridge jaw during the staple firing stroke. As described in greater detail below, each projection comprises a drive surface defined on the underside of it. Coupling member 2842 additionally comprises intermediate projections 2146 extending laterally therethrough, which are configured to prevent trigger member 2840 from executing the staple firing stroke when an unused staple cartridge is not used. it is positioned in front of the firing member 2840 at the start of the staple firing stroke.
[0285] [0285] In addition to the above, each side of the coupling member comprises a first projection, or anterior projection 2843d, and a second projection or posterior projection 2843p positioned behind the anterior projection 2843d. The anterior portion 2843d comprises a curved guide surface 2851d defined at its distal end, which is configured to engage the anvil initially. The anterior projection 2843d additionally comprises a first drive surface, anterior 2845d defined on the underside thereof. Similarly, the posterior projection 2843p comprises a curved guide surface 2851p defined at its distal end, which is configured to engage the anvil. The rear projection 2843p additionally comprises a second drive surface or rear 2845p defined on its underside.
[0286] [0286] As the firing member 2840 is advanced distally, in addition to the above, the driving surfaces 2845d and 2845p can cooperate to engage and position the anvil. In certain embodiments, the drive surfaces 2845d and 2845p define a drive plane that is parallel, or at least substantially parallel, to the longitudinal path 2860 of the firing member 2840 during the staple firing stroke. In other embodiments, the front drive surface 2845d is positioned above the rear drive surface 2845p. In other words, the front drive surface 2845d is positioned farther from the longitudinal path 2860 than the rear drive surface 2845p. In at least one case, the drive surfaces 2845d and 2845p can define a drive plane that is transversal to the longitudinal path 2860. In certain cases, an angle of 1 degree, for example, can be defined between the drive plane and the 2860 longitudinal path.
[0287] [0287] In addition to the above, the previous projections 2843d and the subsequent projections 2843p can move relative to each other. In several cases, an anterior projection 2843d and a posterior projection 2843p on one side of the coupling member 2842 can move independently of each other. Such an arrangement can allow projections 2843d and 2843p to adapt independently to the orientation of the anvil, especially when the firing member 2840 is used to progressively close the anvil. As a result, both projections 2843d and 2843p can remain engaged with the anvil so that forces flow between the firing member 2840 and the anvil at various locations and that the plastic deformation of the projections is reduced.
[0288] [0288] Figure 68 represents the energy required for a first firing member to complete a firing course, identified as 2090 ', and a second firing member to complete a full firing course, identified as 3090. The firing course shot 2090 'represents a condition in which significant plastic deformation and friction are occurring. The firing stroke 3090 represents an improvement over firing stroke 2090 'in which the deformation of the firing member and the anvil protrusion is mainly elastic. It is believed that, in certain cases, the plastic deformation experienced by the firing member and / or the anvil can be reduced by about 40% to 60%, for example, by using the teachings described here.
[0289] [0289] The various modalities described here can be used to balance the charges transmitted between a firing member and an anvil. Such modalities can also be used to balance the charges transmitted between a firing member and a clamp of the staple cartridge. In any case, the firing member can be designed to provide a desired result, but it must be understood that such a desired result may not be achieved under any circumstances due to the manufacturing tolerances of the stapling instrument and / or the variability in the thickness of the tissue captured inside the end actuator, for example. In at least one case, the upper projections and / or the lower leg of the firing member, for example, may comprise features to be used close to the body that are configured to allow the firing member to define a balanced interface with the anvil.
[0290] [0290] In addition to the above, now with reference to Figures 64 to 67, a firing member 2940 comprises lateral projections 2943. Each projection 2943 comprises longitudinal ridges 2945 extending from the bottom thereof. The 2945 ridges are configured to plastically deform and / or mark when the firing member 2940 is advanced distally to engage the bib. 2945 ridges are configured to wear out quickly, or join together, in order to increase the contact area between the 2943 projections and the anvil and provide a better load balance between the firing member 2940 and the anvil . Such an arrangement can be especially useful when the end actuator is used to perform multiple clamp firing strokes. In addition to or instead of the above, one or more blocks to be used together with the body can be fixed to the projections of the firing member which can be configured to deform plastically.
[0291] [0291] Figures 72 and 73 represent a surgical stapling anvil, or anvil claw, 3100 for use with a surgical stapling instrument. The anvil 3100 is configured to deform the clamps during a surgical stapling procedure. The anvil 3100 comprises an anvil body 3101 and an anvil cover 3110. The anvil body 3101 and the anvil cover 3110 are welded together. The anvil body 3101 comprises a proximal portion 3102 and a coupling portion 3103. Coupling portion 3103 is configured to be mounted on an end actuator of a surgical stapling instrument to allow rotation of the anvil claw 3000 with respect to a corresponding jaw such as a staple cartridge jaw. Arrangements are provided in which the anvil claw is fixed in relation to the clamp cartridge clamp and, in such cases, the clamp cartridge clamp can rotate in relation to the anvil claw. The anvil body 3101 additionally comprises a distal tip portion 3104, outer edges 3107 and a flat surface facing tissue 3106. The surface facing tissue 3106 comprises staple forming pockets defined in the same configuration.
[0292] [0292] The anvil cover 3110 comprises a proximal end 3111, a distal end 3112 and a perimeter, or continuous edge, 3113. When the anvil body 3101 and the anvil cover 3110 are assembled and / or welded together, the edge 3113 can be leveled or substantially leveled with the top surface 3108 of the anvil body 3101 so as to provide a smooth top surface of the surgical stapling anvil 3100 although a step in joining them may be possible. In addition to the above, the anvil cover 3110 comprises a rounded top surface 3114. The upper surface 3114 can be contoured and / or rounded, for example, to provide a continuous curved upper surface of the surgical stapling anvil 3100 when the anvil body 3101 and the anvil cover 3110 are welded together. In many cases, the continuous edge 3113 is a feature configured for welding, as discussed below.
[0293] [0293] The 3100 two-piece surgical stapling anvil can allow the internal surfaces inside the anvil 3100 to be polished during manufacture. The fabrication of these parts can include processes that result in a less than desirable surface finish of various surfaces within the anvil. Improving the
[0294] [0294] Figure 74 shows a portion of a 3200 surgical stapling instrument comprising an anvil body 3210 and an anvil cover 3220 welded to the 3210 anvil body with a 3201 weld. Although only a portion of the 3200 surgical stapling anvil be illustrated, it should be understood that a mirrored portion of the illustrated portion exists to complete the 3200 surgical stapling anvil. The illustrated and mirrored portions will be discussed simultaneously going forward. The anvil body 3210 comprises a surface facing the fabric 3211 which comprises a plurality of staple forming pockets 3212 defined therein, projections 3215 comprising cam surfaces 3216 configured to be contacted by the anvil cam features a firing member of a surgical stapling instrument, and a longitudinal slot 3213 configured to receive the firing member through it. The anvil body 3210 additionally comprises outer edges 3214. The projections 3215 are configured to support, or support, a distributed load force 3231 applied by a firing member as the firing member moves through a stroke. staple firing. The anvil body 3210 further comprises a protrusion 3217 configured to secure the anvil cap 3220 during welding. The protrusion 3217 can assist in assembly and can ensure proper alignment of the anvil cap 3220 and the anvil body 3210. The protrusion 3217 can also act as a feature to improve the total stiffness of the anvil. The lid of the whisker 3220 comprises an upper portion 3223, a lower portion 3221 and a projection 3224 configured to rest on the projection 3217 before, during and after welding.
[0295] [0295] The upper portion 3223 of the anvil cap 3220 and the anvil body 3210 are welded together with weld 3201. Welding access is provided by chamfered edges on one or both of the anvil body 3210 and the cap of the anvil 3220. In this case, the weld surfaces of the anvil body 3210 and the anvil cap 3220 are vertical and, as a result, weld 3201 is vertical. Weld 3201 comprises a weld length, or depth, marked 3202. Weld depth 3202 is about 0.030 inches, for example. In particular, weld 3201 does not penetrate the anvil 3200 into the horizontal surfaces of the protrusions 3217, 3224. With this arrangement, the anvil body 3210 will tend to deflect rotationally around the pivot axis P due to the combination of applied forces to the anvil body 3210 by the firing member and the tissue. As the firing member makes contact by cam with the surfaces 3216 by pressing on the projections 3215, represented by the distributed load force 3231, and the fabric and the cartridge puncture the surface facing the fabric 3211, represented by the force - distributed load force 3232, both sides of the anvil body 3210 (only one shown in Figure 74) may tend to rotate around a pivot and P axis and deflect vertically and / or outwardly in relation to the limb and the anvil cap 3220. This deflection, represented by deflection 3233, is allowed due to the lack of penetration of the weld from the solder arrangement provided. In some cases, the anvil body 3210 and the anvil cover 3220 may separate into a non-welded portion, or joint, 3204 that is 3203 in length.
[0296] [0296] Figure 75 shows a portion of a 3300 surgical stapling instrument comprising an anvil body 3310 and an anvil cover 3320 welded to the anvil body 3310 with a 3301. weld Although only a portion of the 3300 surgical stapling anvil be illustrated, it should be understood that a mirrored portion of the illustrated portion exists to complete the surgical stapling anvil 3300. The illustrated and mirrored portions will be discussed simultaneously going forward. The anvil body 3310 comprises a surface facing the fabric 3311 which comprises a plurality of staple forming pockets 3312 defined therein, projections 3315 comprising cam surfaces 3316 configured to be contacted by the anvil cam features a firing member of a surgical stapling instrument, and a 3313 longitudinal slot configured to receive a firing member through it. The anvil body 3310 additionally comprises external edges 3314. The projections 3315 are configured to support, or support, a distributed load force 3331 applied by a firing member as the firing member moves through a firing stroke. Bobby pins. The anvil body 3310 further comprises an upper portion 3317 which extends from the slot 3313 to the outer edge 3314. The cover of the anvil 3320 comprises an upper portion 3323, a lower portion 3321 and a projection 3224 configured to rest. over projection 3317 before, during and after welding.
[0297] [0297] The protrusion 3324 of the anvil cap 3320 and the upper portion 3317 of the anvil body 3310 are welded together with the weld
[0298] [0298] Figure 76 shows a portion of a 3400 surgical stapling instrument comprising an anvil body 3410 and an anvil cover 3420 welded to the anvil body 3410 with a 3401 weld. Although only a portion of the 3400 surgical stapling anvil be illustrated, it should be understood that a mirrored portion of the illustrated portion exists to complete the 3400 surgical stapling anvil. The illustrated and mirrored portions will be discussed simultaneously going forward. The anvil body 3410 comprises a surface facing the fabric 3411 which comprises a plurality of staple forming pockets 3412 defined therein, projections 3415 comprising cam surfaces 3416 configured to be contacted by the resources.
[0299] [0299] The upper portion 3423 of the anvil cap 3420 and the body of the anvil 3410 are welded together with weld 3401. Welding access is provided by chamfered edges over one or both of the 3410 anvil body and the anvil cap 3420. In this case, the weld surfaces of the anvil body 3410 and the anvil cap 3420 are angled and, as a result, weld 3401 is angled. The 3401 weld comprises a weld length, or depth, marked 3402. The weld depth 3402 is about 0.030 inch, for example. In particular, weld 3401 does not penetrate anvil 3400 into the horizontal surfaces of projections 3417, 3424 and, with this arrangement, the body of anvil 3410 will tend to deflect in a rotational manner around the pivot axis P. Specifically, the combination of forces applied to the anvil body 3410 by the member
[0300] [0300] Figure 77 represents a 3500 surgical stapling anvil for use with a surgical stapling instrument. The anvil 3500 comprises an anvil body 3510 and an anvil cover 3520. The anvil body 3510 comprises a surface facing the fabric 3511 which comprises a plurality of staple forming pockets 3512 defined therein, projections 3515 comprising 3516 cam surfaces configured to be engaged by the anvil cam features of a firing member of the surgical stapling instrument, and a 3513 longitudinal slot configured to receive a firing member therethrough. The projections 3415 are configured to support, or support, a distributed load force applied by a firing member as the firing member moves through a clamping firing course. The anvil body 3510 additionally comprises projections 3517 configured to hold the anvil cover 3520 in place during welding. The 3517 protrusion can assist in mounting the 3520 cover and the 3510 anvil body and can ensure proper alignment of the 3520 anvil cover and 3510 anvil body. The 3517 protrusion can also improve the total anvil stiffness of the 3500 anvil. anvil cover 3520 comprises an upper portion 3523, a lower portion 3521 and projections 3524 configured to rest on the projection 3517 before, during and after welding.
[0301] [0301] The upper portion 3523 of the anvil cover 3520 and the anvil body 3510 are welded together with welds 3501. Only one weld 3501 is illustrated to provide clarity of the relationship between the body of the anvil 3510 and the anvil cover 3520 before and after welding. In this case, the weld surfaces of the anvil body 3510 and the anvil cover 3520 are angled and, as a result, welds 3501 are angled. Each 3501 weld comprises a weld length, or depth, marked 3502. The depth, or penetration, of 3502 weld can be between about 0.015 inch and about 0.040 inch. In certain cases, the weld depth is 0.030 inches, for example. In particular, weld 3501 penetrates anvil 3500 into the horizontal surfaces of projections 3517, 3524. Providing angled weld surfaces that are configured to match the depth of weld penetration can help prevent deflection of the anvil rotationally as well as see - tically. In other words, having welds with a weld penetration depth equal to or greater than the length of the angled weld surfaces can increase the moment of inertia and the total stiffness of the 3500 anvil. In other cases, the depth of the weld weld 3502 can be less than the length of the angled weld surfaces, or the coupled length. Appropriate welding techniques are used to weld any of the anvils described in the present invention. In some cases, a gap is present adjacent to the weld surfaces that is configured to receive the weld material. In some cases, a gap is not provided. In at least one of these cases, the angled welding surfaces are laser welded.
[0302] [0302] Figure 78 is a micrograph of an anvil 3600 comprising an anvil body portion 3610 and an upper anvil portion 3620. The anvil body portion 3610 comprises a surface facing tissue 3611 comprising an plurality of staple forming pockets 3612 defined therein, a longitudinal cavity 3613 configured to receive a firing member of a surgical instrument therethrough, and projections 3615 configured to be engaged by a firing member during a staple firing course . The body portion of the anvil 3610 and the upper portion of the anvil 3620 are welded together with welds 3601 - each comprising a length of weld penetration 3602. In particular, weld 3601 does not penetrate anvil 3600 into horizontal surfaces 3617 of the upper projections 3616 of the anvil body portion 3610.
[0303] [0303] The anvil 3600 comprises a massive unsealed weld width 3606 and also a massive slit cavity width
[0304] [0304] Figure 79 represents an anvil 3700 comprising an anvil body portion 3710 and an anvil cover 3720. The anvil body portion 3710 comprises a flat surface facing fabric 3711 that includes a plurality of forming pockets of staples that comprise inner staple forming pockets 3712A, intermediate staple forming pockets 3712B and external staple forming pockets 3712C. The body portion 3710 additionally comprises a longitudinal cavity, or slot, 3713 configured to receive a firing member therethrough, anvil cam projections 3715 defining radial cam surfaces 3714 configured to be engaged by a firing member as the firing member moves through its staple firing stroke, and projections 3716 configured to secure the anvil cover 3730. Slit 3713 comprises a first portion 3713A configured to receive a cutting member of the firing member therethrough and a second portion 3713B configured to receive an upper cam portion of the firing member therethrough. The first portion 3713A comprises a width that is less than the width of the second portion 3713B.
[0305] [0305] The anvil cover 3720 comprises a Y-shaped cross section. The anvil cover 3720 comprises a lower portion 3721 configured to be received within slot 3713 defining a first coupling region and an upper portion 3723 configured to be welded to the 3710 anvil body. The upper portion 3/23 comprises projections, or shields, 3/24 that comprise horizontal alignment surfaces configured to rest on the corresponding horizontal alignment surfaces of the 3716 projections. This interface defines a second slot region that is perpendicular, or at least substantially perpendicular, to the first slot region. The horizontal alignment surfaces are at least substantially parallel to the fabric facing surface 3711. The upper portion 3723 is enlarged with respect to the lower portion 3721 and comprises the angled weld surfaces 3725 configured to be welded to the corresponding angled weld surfaces 3717 of the anvil body 3710 that define a third coupling region. The welds comprise weld penetration lengths equal to the length of the angled weld surfaces 3725, 3717.
[0306] [0306] The anvil 3700 comprises a non-welded width 3706 and a slot width 3705. The non-welded width 3706 is not greater than about 105% of the width of the slot 3705. A central plane geometric axis "CA" is defined as the anvil geometric center
[0307] [0307] The 3712B intermediate staple forming pockets define an internal contour geometric axis 3734 which is a fourth distance 3734D from the central geometric axis. The fourth distance 3734D is greater than the first distance 3731D, the second distance 3732D and the third distance 3733D. In other words, the non-welded width 3706 does not extend into the intermediate staple forming pockets 3712B. Minimizing the first distance 3731D, or the distance that the 3731D outer contour axis extends from the central CA axis, can increase the total stiffness of the anvil 3700 to reduce longitudinal flexion, or deflection, and rotational, or torsional, of the 3700 anvil.
[0308] [0308] Figure 80 is a 3800 chart that represents four different surgical stapling anvil layouts subject to two different loading scenarios. Model A is a one-piece anvil, or monobloc. Model B is a two-piece anvil comprising an anvil body and an anvil cover welded to the anvil body. The anvil cover comprises an upper welded portion which comprises a non-welded width greater than 105% of the slot width. Like model B, model C is a two-piece anvil comprising an anvil body and an anvil cap welded to the anvil body. The anvil cover comprises an un-welded width of about 105% of the slot width. However, the angle of the angled weld surfaces, which are defined between the anvil cover and the anvil body, of model C prevents a weld depth from being formed that extends the entire length of the weld surfaces. angular. In at least one case, the weld depth is less than 0.03 inches, for example. The model D represents the anvil 3700. The anvil cover comprises a non-welded width of about 105% of the slot width and the angle of the angular weld surfaces of the model D allows a weld depth to be created that melts the entire length of angled weld surfaces. In at least one case, the weld depth is at least 0.03 inches, for example. As a result, the deflection of the distal tip of the anvil 3700 is less than the deflection of the distal tip of the anvils of model A, model B and model C. In addition, the general stress on the protrusions of model B, model C and model D is smaller than in the protrusions of model A.
[0309] [0309] Figures 81 to 83 represent a 3900 anvil for use with a surgical stapling system. The 3900 anvil is configured to deform the staples during a surgical stapling procedure. Anvil 3900 comprises an anvil body 3910 and an anvil cover 3920. The anvil body 3910 and the anvil cover 3920 are welded together. The anvil body 3910 comprises a proximal portion 3912 comprising a coupling portion configured to be mounted on an end actuator of a surgical stapling instrument to allow rotation of the anvil clamp 3900 with respect to a corresponding claw such as, for example , a staple cartridge claw. Arrangements are foreseen in which the anvil claw is fixed in relation to the clamp cartridge claw and, in these cases, the clamp cartridge claw can rotate in relation to the anvil claw. The body of the anvil 3910 additionally comprises a portion of the distal tip 3914 and a flat surface facing the 3911 fabric. The surface facing the 3911 comprises staple forming pockets 3912 defined therein that are configured for deformation. staples during a surgical stapling procedure. The anvil body 3910 comprises a longitudinal slot 3913 configured to receive a firing member of the surgical instrument through it. The anvil body 3910 additionally comprises cam features 3914 which include radial cam surfaces 3915 configured to be engaged by the anvil cam portions of the firing member during its staple firing stroke.
[0310] [0310] With reference to Figure 81, the anvil cover 3920 comprises a plurality of shallow weld zones 3930 each comprising a zone length 3930L, and a plurality of deep weld depth zones 3940, each comprising comprising a 3940L zone length. Zone lengths 3930L, 3940L are the same; however, in other cases, the lengths of 3930L, 3940L are different. Each shallow weld zone 3930 of the cap 3920 comprises an upper portion 3933 and a lower portion 3931. The upper portions 3933 comprise extended body portions 3934 which include welding surfaces
[0311] [0311] The welding surfaces 3935, 3917 discussed above are configured to be welded together to weld the shallow welding zones 3930 to the anvil body 3910 with a 3936 weld comprising a 3937 weld root (Figure 83). The 3937 weld root is configured to penetrate at least the horizontal surface of the 3916 projection. The 3940 deep weld zones are configured to be welded to the 3910 anvil body with a 3946 weld comprising a 3947 weld root (Figure 83 ). The weld access region 3945 allows a deep weld, which welds the bottom portion 3941 to the anvil body 3910. During welding, the entire boss 3946 can be fused to the anvil body 3910. Although the weld lengths 3938 , 3948 can be similar, if not equal, the effective or liquid weld depth between the anvil cover 3920 and the anvil body 3910 increases by providing both shallow weld zones 3930 and deep weld zones 3940. The depth of the weld can be defined as the distance between an edge 3901 of an upper surface 3921 of the anvil to the weld root of the respective weld. Alternating between the shallow weld zones 3930 and the deep sole zones 3940 may allow shallow and deep zones on both sides of the anvil 3900 along the longitudinal length of the anvil 3900 and create a firm connection between the 3920 anvil cover and the anvil body 3910.
[0312] [0312] 3930 shallow weld zones and 3940 deep weld zones are configured to increase the total weld depth along the length of the 3900 anvil. The location, longitudinal length and number of weld zones shallow 3930 and deep weld zones 3940 can be varied to alter, or adjust, the stiffness of the 3900 anvil along its length. For example, the shallow welding zones 3930 comprise a first rigidity and the deep welding zones 3940 comprise a second rigidity which is different from the first rigidity. Such an arrangement can also allow the use of a single depth welder to produce 3936, 3946 welds, which can simplify fabrication. In addition to these welds, a filler weld can be applied to fill the 3945 access regions after the 3946 welds have been produced, to increase the stiffness of the 3900 anvil and reduce the likelihood of rotational deflection within of the anvil 3900. Arrangements are made in which, instead of having longitudinally alternating zones having deep welds on both sides of the anvil and zones having shallow welds on both sides of the anvil (Figure 81), the anvil comprises a plurality of zones that a length L extends where each zone comprises a shallow weld and a deep weld on opposite sides of the anvil. For example, each zone comprises a shallow weld that extends along a length L of the zone on one side of the anvil and a deep weld that extends along the length L of the zone on the other side of the anvil. In addition, in addition to having different lengths, the plurality of zones can alternate the side on which the shallow and deep welds are made. As a result, such an anvil would comprise a shallow weld and a deep weld along the entire length of the anvil.
[0313] [0313] Several surgical stapling anvils described here can be manufactured using a variety of processes. For example, the anvil body portion and / or the anvil lid portions can be manufactured using a metal injection molding process. The anvil body portion and / or the anvil lid portions can also be manufactured using a machining process. In at least one case, one of the anvil body portion and the anvil cover is manufactured using a metal injection molding process and the other one between the anvil body portion and the anvil cover it is entirely manufactured using a machining process. In certain cases, electrochemical machining processes can be used to form the anvil body portion, the anvil cover portion, or both the anvil body portion and the anvil cover portion. Molding processes can allow fillets to be easily incorporated into the anvil cover and / or anvil body geometries. Such fillets can reduce stress concentrations in places where otherwise vertices, or corners, would exist.
[0314] [0314] A method for making a surgical stapling anvil like those described here can comprise several steps. An anvil manufacturing step comprises manufacturing an anvil body portion and an anvil cover member. Another step of manufacturing an anvil comprises polishing the anvil cam surfaces of the anvil body portion. In many cases, any internal surface that can come into contact with any portion of a firing member can be polished. Another stage of manufacturing an anvil comprises welding the body portion of the anvil and the lid member of the anvil together. The welding step may comprise, for example,
[0315] [0315] In addition to the above, the polishing step may involve polishing several areas of the cam surfaces, or ridges, of the anvil. The projections may comprise a first zone and a second zone, the first zone being configured to be brought into contact by the cam portions of the firing member anvil and the second zone extending laterally beyond the first zone. Under normal firing circumstances, the firing member would come into contact with only the first protrusion zone and not the second protrusion zone. Under abnormal firing circumstances, however, a portion of the firing member may come into contact with the second zone. In this way, it can be advantageous to ensure that both the first zone and the second zone of the projections are polished to reduce the likelihood of pinning on the projections when placed in contact with the firing member.
[0316] [0316] Figures 84 and 85 show an anvil 4000 comprising an anvil body 4010 and an anvil cover 4020. The anvil body 4010 comprises a surface facing fabric 4011 and a plurality of forming pockets of staples 4012 defined on the surface facing the fabric 4011. The anvil 4000 comprises a longitudinal cavity 4013 configured to receive a firing member of the surgical instrument through it. Cavity 4013 comprises anvil cam surfaces 4015 defined by the projections 4014 of the anvil body 4010. The firing member is configured to provide a cam to the projections 4014 as the firing member is moved through a firing stroke. .
[0317] [0317] The anvil 4000 comprises primary welds 4001 and a secondary filler weld 4003. Although only a secondary filler weld 4003 is illustrated, the anvil 4000 can comprise secondary filler weld at the top, or above, of all welds existing primary The filler weld 4003 provides additional stiffness to the anvil 4000 along the longitudinal length of the anvil 4000 and also assists in preventing rotational inclination, or torsional bending, or twisting the sides of the anvil. In addition, filler weld 4003 increases the total penetration depth of the weld into the anvil 4000 which increases the stiffness of the anvil 4000. Primary welds 4001 fuse the corresponding angular surfaces of the body of the anvil 4010 and the anvil cap
[0318] [0318] The additional angular surfaces 4017, 4027 and the horizontal surfaces 4016, 4018, 4026, 4028 are configured to assist in the assembly of the anvil body 4010 and the anvil cover 4020 prior to welding during manufacturing. For example, when preparing anvil body 4010 and anvil cover 4020 for welding, additional surfaces can assist in aligning the body of anvil 4010 and anvil 4020 for welding. The second horizontal surface 4016 provides a defined depth for the anvil cover 4020. In other words, the second horizontal surface 4016 defines the lowest settable position that the bottom surface 4026 can rest in relation to the anvil body.
[0319] [0319] Figure 86 represents an anvil 4100 comprising a first anvil member, or body portion of the anvil, 4110 and a second anvil member, or anvil cover, 4130. The first anvil member 4110 comprises a surface facing fabric 4111 and a plurality of staple pockets 4112 defined therein. The first anvil member 4110 also comprises a longitudinal cavity 4113 configured to receive a firing member of a surgical instrument therethrough. The first anvil member 4110 further comprises anvil cam protrusions 4114 that define anvil cam surfaces 4115 configured to be engaged by the firing member as the firing member moves through a firing stroke.
[0320] [0320] The first anvil member 4110 and the second anvil member 4130 comprise interlocking features configured to increase the total stiffness of the 4100 anvil and reduce the transverse flexion induced by the 4100 anvil tissue in the opposite direction to a staple cartridge opposite when the 4100 anvil is held against the staple cartridge. The first anvil member 4110 comprises horizontally extending interlocking features 4117 received within the corresponding interlocking openings 4137 of the second anvil member 4130. The first anvil member 4110 also comprises interlocking features that extend vertically 4116 received within the corresponding openings 4136 of the second anvil member 4130. In several cases, the interlocking features 4116, 4117 may require the anvil 4100 to be mounted in only one longitudinal direction before being welded together. For example, the second anvil member 4130 can be slid longitudinally with respect to the first anvil member in a longitudinal direction to mount the first anvil member 4110 and the second anvil member
[0321] [0321] The first anvil member 4110 and the second anvil member 4130 are welded together with outer welds 4101 and inner welds 4103. Welds 4101, 4103 can comprise laser welds, for example. The outer welds 4101 are located on the side portions 4105 of the anvil 4100. The inner welds 4103 are located in the longitudinal cavity 4113 which is defined by the first anvil member 4110 and the second anvil member 4130. For example, laser welding access the longitudinal cavity 4113 through the opening defined between the cam bosses 4114 to form the internal welds 4103. In several cases, the opening defined by the cam bosses 4114 is dimensioned to allow access of the weld specifically for the internal welds 4103. Such an arrangement with internal welds, external welds, and interlock features can increase the overall strength of an anvil as well as reduce transverse deflection and / or torsional deflection. The interlocking resources can also provide a fixed support surface so that, while one of the first anvil member and the second anvil member is grounded during the weld preparation process, the other of the first anvil member of an anvil and the second anvil member is limited to a plane of motion. Such an arrangement can ensure that the first anvil member and the second anvil member do not move relative to each other before and / or during the welding process.
[0322] [0322] Now with reference to Figure 87, an anvil 4200 comprises an anvil body 4210 and an anvil cover 4220. The anvil body 4210 comprises a flat contact surface with the fabric 4211 which has a plurality of pockets. formation of staples 4212 defined therein. The anvil body 4210 also comprises a longitudinal cavity 4213 configured to receive a firing member of a surgical instrument through it. The anvil body 4210 additionally comprises anvil cam protrusions 4214 that define anvil cam surfaces 4215 configured to be engaged by the firing member as the firing member moves through a firing stroke.
[0323] [0323] The cover of the anvil 4220 is positioned inside the longitudinal cavity 4213 and is welded to the body of the anvil 4210 with welds
[0324] [0324] Figures 88 to 92 represent a 4300 surgical stapling set comprising a welded anvil that employs another arrangement to assist in preventing and / or limiting the longitudinal flexion of the welded anvil. Surgical staple assembly 4300 comprises an anvil claw 4340 comprising an anvil body 4350 and an anvil cover 4360, a cartridge channel claw 4330 configured to receive a staple cartridge within a cartridge receiving opening 4333 thereof, and a closing mechanism 4310 configured to rotate the anvil claw 4340 with respect to the cartridge channel claw 4330 with a cam mechanism. That said, modalities are provided in which the claw of the cartridge channel 4330 is pivoted in relation to the anvil claw 4340. The body of the anvil 4350 comprises a surface facing the fabric 4351 which comprises a plurality of staple forming pockets there defined that are configured to deform the staples ejected from a surgical staple cartridge. The stapling assembly 4300 additionally comprises a firing member 4370 configured to move longitudinally inside a groove 4357 of the mustache claw 4340 and inside a groove 4331 of the claw of the cartridge channel 4330 to position a plurality of staples stored within a staple cartridge and configured to cut the tissue captured between the anvil jaw 4340 and the cartridge channel jaw 4330 during a firing stroke.
[0325] [0325] The 4300 surgical stapling set comprises means for improving the overall stiffness and strength of the 4340 anvil claw by reducing the stiffness of the cartridge channel claw
[0326] [0326] The proximal surrounding portions 4352 comprise a lower portion 4354, an upper portion 4353 and a projection 4356 defined therebetween. The lower portions 4354 are configured to overlap the portions of the proximal wall 4335 when stapling assembly 4300 is in the closed configuration (Figure 91, for example). The upper portions 4353 are thicker, or larger, than the lower portions 4354; however, the upper portions 4353 and the lower portions 4354 can have any suitable configuration. Collectively, the thicker upper portions 4353 and the thicker lower portions 4354 are configured to increase the overall stiffness and moment of inertia of the anvil claw 4340. The projections 4336 of the claw channel 4330 are facing the corresponding projections 4356 of the proximal surrounding portions 4352 when the stapling assembly 4300 is in the closed configuration.
[0327] [0327] Referring mainly to Figure 92, the 4335 proximal wall portions comprise a cutout comprising a wall thickness that is less than the dispersed wall portions
[0328] [0328] In addition to the above, the anvil jaw 4340 comprises a first stiffness and the cartridge channel jaw 4330 comprises a second stiffness. The stapling assembly 4300 comprises structural means to reduce the second stiffness to increase the first stiffness. In other cases, the first stiffness and the second stiffness comprise a ratio of between about 1: 3 and about 1: 1. In other cases, the first stiffness and the second stiffness comprise a ratio of about 1: 3. In other cases, the first stiffness and the second stiffness comprise a ratio of about 1: 1.
[0329] [0329] Now with reference to Figures 93 to 95, a cartridge channel jaw 4400 comprises a body portion 4410 and a cap portion 4430. Body portion 4410 comprises a longitudinal cavity 4415 (Figure 94) configured to receive the cap portion 4430. Such an arrangement may allow for polishing the various internal surfaces of the 4400 channel jaw during fabrication to reduce the force to advance, or fire, a firing member through a surgical instrument. The cartridge channel jaw 4400 comprises a staple cartridge receiving cavity 4401 defined by channel walls 4411 of body portion 4410 that is configured to receive a staple cartridge therein, a proximal portion 4405 configured to be coupled to an instrument drive shaft, and a distal portion 4407. A replaceable staple cartridge is configured to be inserted, or installed, into the jaw of the 4400 cartridge channel. Referring to Figure 95, the body portion 4410 it further comprises a longitudinal opening 4413 configured to receive a portion of a firing member of a surgical instrument therethrough when the firing member moves through a staple firing course.
[0330] [0330] The longitudinal cavity 4415 of the body portion 4410 defines projections 4413 (Figure 95) that are configured to hold the cover portion 4430 in place in relation to the body portion 4410 for welding. Cap portion 4430 comprises cap walls 4433 and is welded to body portion 4410 with 4409 welds. 4409 welds can comprise laser welds, for example. The lid portion 4430 and the projections 4413 of the body portion 4410 define a longitudinal slot 4403 configured to receive a portion of the firing member in a sliding manner. The longitudinal slot 4403 is polished before welding the cap portion 4430 to the body portion 4410. In several cases, the entire longitudinal slot 4403 is polished. For example, the internal surfaces of the buffer portion
[0331] [0331] Figures 96 to 107 compare two different firing members 4500, 4600 for use with 4800, 4700 surgical stapling systems, respectively. The firing member 4500 (Figure 96) comprises a body 4510 comprising a proximal connecting portion 4512 and a cutting member 4511 configured to cut the fabric during a staple firing course. The firing member 4500 further comprises a channel claw coupling member 4520 and an anvil claw coupling member 4530 configured to hold an anvil claw and channel claw relative to each other during a firing stroke. of staple of the firing member 4500. Similarly, the firing member 4600 (Figure 97) comprises a body 4610 comprising a proximal connecting portion 4612, a cutting member 4611 configured to cut the fabric during a stroke. clamp firing, and a 4615 locking feature. The firing member 4600 further comprises a channel claw coupling member 4620 and an anvil claw coupling member 4630 configured to hold an anvil claw and an anvil claw. channel in relation to each other during a clip firing course of the trigger member 4600.
[0332] [0332] Now with reference to Figures 98 and 99, the anvil claw coupling member 4530 of the firing member 4500 comprises lateral projections, or anvil cam features, 4531 extending from the side sides of the 4510 body. The projections are in the form of fillets in relation to the 4510 body with fillets
[0333] [0333] The longitudinal length 4542 and the vertical thickness 4541 of the side projections 4531 comprise a ratio of between about 2.5: 1 and about 20: 1, for example. In certain cases, the longitudinal length 4542 and the vertical thickness 4541 comprise a ratio of between about 5: 1 and about 10: 1. In some cases, the longitudinal length 4542 and the vertical thickness 4541 comprise a ratio of about 5: 1. In several cases, the vertical thickness 4541 and the lateral width 4545 comprise a ratio of between about 1: 2 and about 1: 1, for example. In certain cases, the vertical thickness 4541 and the lateral width 4545 comprise a ratio of about 1: 1. These arrangements reduce the deflection of the projection and, in turn, reduce the deflection of the projections 4531 of the firing member
[0334] [0334] Now with reference to Figures 100 and 101, the coupling member of the anvil claw 4630 comprises side projections, or anvil cam features, 4631 that extend from the side sides of the 4610 body. Each 4631 projection comprises a side width, or thickness, 4645 and a vertical thickness 4641. Side width 4645 is defined as the distance between the body 4610 and an outer edge 4636 of the 4631 projection. The side projections 4631 additionally comprise a longitudinal length 4642 (Figure 103 ) defined as the distance between an anterior edge 4635 of the 4631 projection and a posterior edge 4637 of the 4631 projection. The longitudinal length 4542 is greater than the longitudinal length
[0335] [0335] Now returning to Figure 104, a 4700 stapling system comprises an end actuator for use with a surgical instrument, which includes a 4750 anvil claw, a 4780 cartridge channel claw, and a clamps 4710 installed inside the 4780 cartridge channel claw. The clamping system 4700 also comprises the trigger member 4600, discussed above. The staple cartridge 4710 comprises a plurality of staples removably stored within the staple cavities 4712 of the staple cartridge 4710 configured to be fired by the firing member 4600, a cartridge platform, or a fabric-facing surface, 4711, and a longitudinal slot 4713 configured to receive the trigger member 4600 through it. Anvil claw 4750 comprises a surface facing fabric 4751 comprising a plurality of staple forming pockets 4752 configured to deform staples, an anvil slot 4753 configured to receive claw coupling member 4630 from the member of firing 4600 through it, and cam projections 4755 configured to be engaged by projections 4631 of firing member 4600 as firing member 4600 moves through its staple firing course. The channel 4780 comprises channel walls 4781, a longitudinal slot, or cavity, 4785 configured to receive the claw coupling member 4620 therethrough, and cam projections 4783 configured to be engaged by the claw coupling member 4620 as the firing member 4600 moves through its clamp firing stroke. In this scenario, the 4631 projections act as cantilever strips resulting in much less force required to flex the 4631 projections than in the system described below.
[0336] [0336] Now returning to Figure 105, a 4800 stapling system comprises an end actuator for use with a surgical instrument comprising the 3700 anvil claw, the 4400 claw cartridge groove, and a staple cartridge 4810 installed inside the clamshell cartridge channel 4400. The 4800 system also comprises the firing member 4500. The staple cartridge 4810 comprises a plurality of staples removably stored within the staple wells 4812 of the staple cartridge 4810 configured to be fired by the firing member 4500, a cartridge platform, or surface facing the fabric, 4811, and a longitudinal slot 4813 configured to receive the firing member 4500 through it. The anvil slot 3713 is configured to receive the claw coupling member 4530 from the firing member 4500 through it, and the protrusions 3715 are configured to be engaged by the projections 4531 as the firing member 4500 moves through. its staple firing course. In such cases, the rounded edges 4533 of the projections 4531 are configured to engage the radiated portions 3714 of the cam projections 3715. The longitudinal slot 4403 of the channel clamp 4400 is configured to receive the claw coupling member 4520 through it and the cam projections 4413 are configured to be engaged by the claw coupling member 4520 as the firing member 4500 moves through its clamping firing stroke. In this scenario, the main source of deflection of the 4531 projections is caused by the shear stress that requires a much greater force to deform the 4531 projections than the force necessary to deform the 4631 projections of the 4700 system illustrated in Figure 104.
[0337] [0337] Now with reference to Figures 106 and 107, a comparison of the deflection of the projections of each stapling system 4700, 4800 is illustrated. An identical trigger load is applied to the stapling systems 4700, 4800 illustrated in Figures 106 and
[0338] [0338] In certain cases, balancing the stiffness of projection 3715 and projections 4531 will balance the deflection magnitude of projection 3715 and the magnitude of deflection of projection 4531 during a firing stroke of the firing member. As a result of such balanced deflections, the protrusion and projection will not dominate each other in terms of deflection, and thus neither the protrusion nor the projection will cause the other to plastically deform substantially more than the other and possibly not at all during the firing stroke. In many cases, the stiffness of the projection is the same, substantially the same, or less than the stiffness of the projection. In certain cases, the height, or vertical thickness, of the projection is substantially similar to the height, or vertical thickness, of the projection. In addition to, or instead of, providing balanced projection and projection geometries, the projection and projection materials can be selected based on the elastic limit values and / or hardness, for example. Having materials with elastic limit values and / or hardness similar to those of the materials can promote equal or balanced deflection values of the projection and projection.
[0339] [0339] Figure 108 is an analysis of the stress and tension 4900 of the anvil 3700 which comprises a weld 3701 during the advance of the firing member 4500. As can be seen in Figure 108, the combination of applying a distributed load 4903 across the firing member 4500 to projections 3715 and the application of a distributed load 4905 across the fabric and the cartridge 4810 to the surface facing fabric 3711 results in a deflection 4901 and a stress profile, as illustrated. The stress analysis shows regions of low stress 4907, regions of medium stress 4908 and regions of high stress
[0340] [0340] According to various designs, a T-shaped cutter tip is used to machine the groove in the anvil and / or the channel that receives the claw coupling members of a firing member. This machining method can cause tip chatter that can roughen the surface of the cut slits with the T-shaped cutting tip. In two-piece and groove anvil designs, a standard cutter tip can be used to eliminate this problem and provide a better surface finish, resulting in reduced force to fire the firing member.
[0341] [0341] Another way to reduce the firing force may include coating at least the polished surfaces of the anvil with material to reduce the friction coefficient of these surfaces. This coating can comprise Medcoat 2000, for example.
[0342] [0342] During the manufacture of the various welded anvil designs described here, X-ray techniques can be employed to check the depth of the weld and / or the integrity of the weld to reduce the chance that resulting defective welds, who have not undergone an X-ray stage, pass a quality control test. Another quality control step may include a destructive batch test in which an anvil is sliced and then analyzed to ensure that the weld depth and / or weld integrity are adequate.
[0343] [0343] Various materials to increase strength and / or provide desirable weld materials can be used in the manufacture of the various two-piece anvil designs described here. For example, a tungsten and rhenium alloy can be used for the anvil cover material. In several cases, a tungsten and rhenium W-3 alloy,
[0344] [0344] As discussed above, the anvil body and the anvil cover may comprise different materials. These materials can be selected based on weldability and / or strength, for example. In addition to weldability and strength, another material selection process can be a factor in hardness. This can be particularly important for the anvil cam protrusions of the anvil body. In some cases, the material selected for the anvil body may comprise a hardness value that is greater than the hardness value of the anvil cover. The cam protrusions of the anvil may then be less resistant to seizing than the anvil body and the anvil cap if both are made using a softer material.
[0345] [0345] In certain cases, rows of training pockets can be stamped on the surface facing the anvil fabric. In such cases, a slit, or notch, can be cut on the surface facing the fabric to provide space for the material to move towards, or inward, during the printing process. This may allow all rows of the training pocket to comprise training pockets having equal pocket depths, and the stamping of the pockets without the pre-cut slot can make the pocket depths even between the rows difficult. .
[0346] [0346] Figures 109 to 114 represent a 10200 training pocket arrangement that is configured to deform a staple during a surgical stapling procedure. The arrangement of 10200 training pockets and several alternative training pockets arrangements are further described in the patent application
[0347] [0347] The training pocket arrangement 10200 further comprises a pair of primary side walls 10208 extending from the flat surface 10207 of the anvil 10201 towards pockets 10210, 10230 and the bridge portion 10205. The side walls primaries 10208 are inclined at an angle 82 (Figure 112) with respect to the flat surface 10207 of the anvil 10201. The layout of the training pocket 10200 additionally comprises edge features 10215, 10235 that provide a transition feature between the outer edges of the pockets 10210, 10230 and the flat surface 10207, between the longitudinal edges of pockets 10210, 10230 and the primary side walls 10208, and between the inner edges of pockets 10210, 10230 and the bridge portion 10205. These edges 10215, 10235 can be rounded and / or chamfered, for example. The edge features 10215, 10235 can help prevent the clamp tips from sticking together.
[0348] [0348] The training pocket 10210 comprises a pair of side walls of pocket 10213 and the training pocket 10230 comprises a pair of side walls of pocket 10233. The side walls of pocket 10213, 10233 are configured to direct the tips of the staples and staple legs towards the forming surfaces of pockets 10210, 10230 if staple ends and / or staple legs initially reach the side walls 10213, 10233 of pockets 10210, 10230. side walls 10213, 10233 extend from the transition edges 10215, 10235 towards the forming surfaces of each pocket 10210, 10230. The side walls 10213, 10233 of the training pockets 10210, 10230 are angled in relation to the flat surface 10207 of the anvil 10201 on the angle 81 (Figure 113) to direct, or channel, the staple legs and / or the staple ends towards the pocket forming surfaces 10210, 10230. The side walls 10213, 10233 are configured for and n encourage staple tips and / or staple legs to form along the geometric axis of pocket 10203 as staples are formed against the forming surfaces of pockets 10210, 10230. Collectively, the side walls primary
[0349] [0349] Pockets 10210, 10230 additionally comprise transition edges 10214, 10234 that provide a transition feature between the side walls of pocket 10213, 10233 and the forming surfaces, as discussed in more detail below. In several cases, the transition edges 10214, 10234 may comprise a profile similar to the transition edges 10215, 10235. In other cases, the transition edges 10214, 10234 may comprise a profile different from the transition edges 10215, 10235. That said, edges 10214, 10234 can be rounded or chamfered, for example. Edges 10214, 10234 comprise a first end where edges 10214, 10234 meet the outer ends of the pockets 10210, 10230 and a second end where edges 10214, 10234 approach the bridge portion 10205, or the inner ends from pockets 10210, 10230. Edges 10214, 10234 can transition to transition edges 10215, 10235 near bridge portion 10205. Edge features 10214, 10234 can also help prevent staple tips from sticking to 10210, 10230 pockets when forming.
[0350] [0350] With reference again to Figure 110, the pocket forming surfaces 10210, 10230 comprise an entry zone forming surface 10211, 10231, an exit zone forming surface 10212, 10232, respectively. In this case, the amount of surface area of the forming surfaces that the forming surfaces of the entry zone 10211, 10231 cover is greater than the amount of surface area of the forming surfaces than the forming surfaces of the exit zone. 10212, 10232 cover. As a result, the forming surfaces of the inlet zone 10211, 10231 do not transition to the forming surfaces of the outlet zone 10212, 10232 in the center of each pocket 10210, 10230. Instead, the transition where entry zones 10211, 10231 transition to exit zones 10212, 10232 are closer to bridge portion 10205. Transitions between the forming surfaces of the entry zone 10211, 10231 and the forming surfaces of the zone exit 10212, 10232 define a valley, or recess in each pocket 10210, 10230. The valleys of the formation pockets 10210, 10230 define a portion, or segment, of the forming surfaces that have the greatest vertical distance from the surface flat 10207.
[0351] [0351] With reference to Figure 111, the forming surfaces of each pocket 10210, 10230 comprise more than one radius of curvature. Specifically, pocket 10210 comprises an inlet radius 10217 which corresponds to the forming surface of the inlet zone 10211 and an outward radius of curvature 10218 which corresponds to the forming surface of the outlet zone 10212. Similarly, pocket 10230 comprises an inlet radius 10237 which corresponds to the forming surface of the inlet zone 10231 and an outward radius of curvature 10238 which corresponds to the formation surface of the outlet zone 10232. In this case, the radii of curvature of input 10217, 10237 are greater than the output bending radii 10218, 10238, respectively. Specific relationships between curvature ranges and various pocket characteristics along with some potential advantages and patterns of specific relationships are further described in US patent application No. 15 / 385,914.
[0352] [0352] In addition to defining the transition points where the entry zones change to the exit zones, the formation pocket vouchers 10210, 10230 also define the narrowest portion of the areas
[0353] [0353] The training pocket arrangement 10200, and several other training pocket arrangements described here, are configured to be used with clamps with various diameters. The diameters of the staples to be used with the 10200 training pocket arrangement can vary between about 0.0079 inches and about 0.0094 inches, for example. In addition, the radius of curvature inlet and radius of curvature of each forming surface comprise a ratio of about 1.5: 1 to about 3: 1 when the input radius is between about 8x the clamp diameter and 10x the clamp diameter, for example. In at least one case, the entrance bend radius and the exit bend radius of each forming surface comprise a ratio of about 2: 1 when the entrance radius is 9x the clamp diameter, for example. In other cases, the radius of curvature inlet and radius of curvature of each forming surface comprise a ratio of about 1.5: 1 to about 3: 1 when the entrance radius is greater than about 0 , 6X the length of the clamp crown and the width of the crest or bridge is less than 1x the diameter of the clamp, for example. In at least one case, the radius of curvature of entry and radius of curvature of each forming surface comprises a ratio of about 2: 1 when the radius of entry is greater than about 0.6x the length of the clamp crown and the width of the crown or bridge is less than 1x the clamp diameter. The exit radius of curvature is about 4x the diameter of the clamp and about 6x the diameter, for example. In at least one case, the radius of curvature of the outlet is about 4.5x the diameter of the clamp.
[0354] [0354] Figures 115 to 120 represent a 10500 training pocket arrangement that is configured to deform a staple during a surgical stapling procedure. The 10500 training pocket layout and various alternative training pocket arrangements are further described in US patent application serial number 15 / 385,914, entitled METHOD OF DEFORMING STAPLES FROM TWO DIFFERENT TYPES OF STAPLE CARTRIDGE WITH THE SAME SURGICAL STAPLING INSTRUMENT, which was filed on December 21, 2016. US patent application serial number 15 / 385,914 is incorporated herein by reference in its entirety. The training pocket layout 10500 comprises a proximal training pocket 10510 and a distal training pocket 10530 designed to
[0355] [0355] The training pocket arrangement 10500 further comprises a pair of primary side walls 10508 extending from the flat surface 10507 of the anvil 10501 towards pockets 10510, 10530 and the bridge portion 10505. The primary side walls 10508 are angled at an angle 81 (Figure 118) with respect to the flat surface 10507 of the anvil 10501. primary side walls 10508 comprise inner edges that are curved, or contoured, in relation to pockets 10510, 10530 .
[0356] [0356] The 10510 training pocket comprises a pair of
[0357] [0357] With reference again to Figure 116, the pocket forming surfaces 10510, 10530 comprise an entry zone forming surface 10511, 10531, an exit zone forming surface 10512, 10532, respectively. The forming surfaces of the entrance area 10511, 10531 coincide with the less aggressive channeling portions of the side walls 10513,
[0358] [0358] Referring to Figure 117, the forming surfaces of each pocket 10510, 10530 comprise more than one radius of curvature. Specifically, pocket 10510 comprises an entrance bend radius 10517 which corresponds to the forming surface of the entrance zone 10511 and an exit bend radius 10518 which corresponds to the formation surface of the exit zone 10512. Similarly, pocket 10530 comprises an inlet radius 10537 which corresponds to the forming surface of the inlet zone 10531 and an outward radius of curvature 10538 which corresponds to the forming surface of the outlet zone 10532. In this case, the radii of curvature of entry 10517, 10537 are greater than the exit radii of curvature 10518, 10538. Specific relationships between the radii of curvature and various pocket characteristics along with some potential advantages and patterns of specific relationships are further described in the patent application US Serial No. 15 / 385,914.
[0359] [0359] Now with reference to Figures 118 to 120, the long edges
[0360] [0360] Figures 121 and 122 depict staples formed with the 10500 training pocket layout in which one staple was aligned with the 10503 pocket geometric axis of the 10500 training pocket layout and the other staple was misaligned with the axis pocket geometry 10503 of training pocket layout 10500. Figure 121 represents a side view 13100 and a bottom view 13100 'of a clamp 13101 in a fully formed configuration with the training pocket layout 10500. This clamp 13101 was aligned with the geometric axis of pocket 10503 of training pocket layout 10500 during the training process. The tips 13104 of the clip legs 13103 reach the formation pocket 10500 along the geometric axis of the pocket 10503.
[0361] [0361] The 13101 clamp comprises a first tip alignment geometry axis TAI, a second tip alignment geometry axis TA2 and a CA alignment geometry axis. When aligned with the pocket axis 10503, the clamp 13101 is formed so that the second tip alignment axis TA2 and the color alignment axis AC are substantially aligned, or in other words, the clamp 13101 assumes a substantially flat configuration. The force to fire the clamp 13101 is illustrated in graph 13110.
[0362] [0362] Figure 122 represents a side view 13120 and a bottom view 13120 'of a clamp 13121 in a fully formed configuration with the formation pocket arrangement 10500. This clamp 13121 was misaligned with respect to the geometric axis of the pocket 10503 of the training pocket layout 10500 during the training process. The clamp 13121 has been taken out of the plane in relation to the geometric axis of pocket 10503. The tips 13124 of the clamp legs 13123 do not collide with the arrangement of forming pocket 10500 along the geometric axis of pocket 10503 nor the crown , or base, 13122 of clamp 13121 aligned with the geometric axis of pocket 10503 during formation.
[0363] [0363] Clamp 13121 comprises a first tip alignment axis TAI, a second tip alignment axis TA2 and a CA alignment axis. When misaligned with the pocket axis 10503, the clamp 13121 is formed so that the second point alignment axis TA2 and the color alignment axis AC are substantially aligned with each other, or in other words, clamp 13121 assumes a substantially flat configuration. In comparison to Figure 121 in which clip 13101 was aligned with the geometric axis of pocket 10503, clip 13121 forms in a fully formed configuration that may be more acceptable for a surgeon to more adequately seal tissue than staples formed with other training pocket arrangements that are formed in a misaligned state.
[0364] [0364] Figures 123 to 129 represent a 6500 training pocket arrangement that is configured to deform a staple during a surgical stapling procedure. The formation pocket arrangement 6500 comprises a shell, or pocket, of proximal formation 6510 and a shell, or pocket, of distal formation 6530 defined on a flat surface, or in contact with the fabric, 6507 of an anvil 6501. The fabric 6507 contact surface of the anvil 6501 can be configured to compress the fabric against a staple cartridge when the anvil 6501 is attached or closed in relation to the staple cartridge. Each shell 6510, 6530 is defined by a contour surface as further described in the present invention. The shells 6510, 6530 are aligned along a pocket geometric axis 6503 of the forming pocket layout
[0365] [0365] With reference to Figures 125 and 126, the layout of the training pocket 6500 additionally comprises a bridge portion 6505 defined between the training pockets 6510 and 6530. In that case, the bridge portion 6505 is lowered in relation to the flat surface Anvil 6507 6501. The bridge portion 6505 comprises a bridge width BW and a bridge depth BD (Figure 129). The "BD" bridge depth is the distance that the lower portion of the bridge portion 6505 is lowered from the flat surface 6507. The bridge width BW is the width of the pocket arrangement 6500 between the shells 6510, 6530. In this example, the width of the BW bridge is the narrowest section of the forming surfaces of each shell 6510, 6530. The formation pocket arrangement 6500 comprises a center "C" (Figures 123 to 125) defined within the bridge portion 6505 The layout of the training pocket 6500 is bilaterally symmetrical with respect to the bridge portion 6505, bilaterally symmetrical with respect to the pocket geometric axis 6503, and rotationally symmetrical with respect to the C center.
[0366] [0366] The training pocket arrangement 6500 additionally comprises a pair of primary side walls 6508 extending from the flat surface 6507 of the anvil 6501 towards the shells 6510, 6530 and the bridge portion 6505. The primary side walls 6508 are inclined at an angle 81 (Figures 127 to 129) with respect to the flat surface 6507 of the anvil 6501. The shells 6510, 6530 define a perimeter 6520 and the inner edges of the primary side walls 6508 extend between the flat surface 6507 and the perimeter 6520 of shells 6510, 6530. With reference mainly to Figure 125, the inner edges of primary side walls 6508 are curved, or contoured, with respect to shells 6510, 6530.
[0367] [0367] In certain cases, the 6500 training pocket arrangement may not include primary side walls 6508. In such cases, shells 6510, 6530 may extend directly to the flat surface 6507 and the perimeter 6520 of shells 6510, 6530 can be set on the flat surface 6507.
[0368] [0368] Again with reference to Figures 125 and 126, the proximal forming shell 6510 comprises a pair of shell side walls 6513 and the distal forming shell 6530 comprises a pair of shell side walls 6533. The shell side walls 6513 .6533 comprise curved or contoured profiles and are configured to direct the staple tips and staple legs towards the 6510, 6530 shell forming surfaces, as well as to help control the staple formation process. The sidewalls 6513, 6533 extend from the primary sidewalls 6508 and from the flat surface 6507 towards the forming surfaces of each shell 6510, 6530. The sidewalls 6513, 6533 are configured to encourage staple tips and / or the legs of the clamps to form along the geometric axis of the pocket 6503 as the clamps are formed against the shell forming surfaces 6510, 6530. Collectively, the primary side walls 6508 and the side shell walls 6513, 6533 cooperate to taper the corresponding clamp tips towards the lateral center of each shell 6510, 6530. An inflection surface, or bottom surface, 6514, 6534 extends along the lateral center of each respective shell 6510, 6530 between the respective side walls 6513, 6533.
[0369] [0369] With reference also to Figure 125, the forming surfaces of the shells 6510, 6530 comprise an input zone forming surface 6511, 6531, respectively, and an output zone forming surface 6512 , 6532, respectively. The forming surfaces of the entry zone 6511, 6531 may coincide with the less aggressive plumbing portions of the side walls 6513, 6533. Similarly, the forming surfaces of the exit zone 6512, 6532 may coincide with the more aggressive plumbing portions of the side walls 6513, 6533.
[0370] [0370] With reference mainly to Figure 126, the forming surfaces of each shell 6510, 6530 are defined by a profile or depth contour. The proximal formation shell 6510 includes the depth profile 6522, and the distal formation shell 6530 includes the depth profile 6542. The depth profiles 6522, 6542 define the depth of the shells 6510, 6530, respectively, at the along their length. The 6510, 6530 shells reach a maximum CD shell depth within their respective transition zones 6509, 6529, which are further described below. The CD shell depth of the 6510, 6530 pockets can be between 0.3 and 0.5 mm, for example. For example, the depth of the CD shell can be 0.4 mm. In still other cases, the CD shell depth may be less than 0.3 millimeter or greater than 0.5 millimeter, for example.
[0371] [0371] Depth profiles 6522, 6542 are curved profiles, which are devoid of linear portions. In addition, the depth profiles 6522, 6542 may comprise one or more radii of
[0372] [0372] The outer longitudinal edges of each shell 6510, 6530 are called entry edges because they define the beginning of the forming surfaces of the entry zone 6511, 6531. The entry edges comprise an entry width that is the greater width of the forming surfaces of each shell 6510, 6530. The inner edges of each shell 6510, 6530 are called exit edges because they define the end of the forming surfaces of the exit zone 6512, 6532. The exit edges comprise an outlet width, also called the BW bridge width (Figure 129), which is the narrowest section of the forming surfaces of each shell 6510, 6530. A transition zone 6509, 6529 is in an intermediate position between the entry area and exit area of each shell. Transition zones 6509, 6529 have a transition width that is less than the entry width, but greater than the exit width. Transition zones 6509, 6529 include a portion of inflation
[0373] [0373] Figure 128 is a cross-sectional view of the distal formation shell 6530 taken along line 128-128 in Figure
[0374] [0374] Referring mainly to Figures 127 to 129, the pair of shell side walls 6533 of the distal forming shell 6530 includes a first side wall 6533a and a second side wall 6533b. The first and second side walls 6533a, 6533b are opposite side walls that extend towards each other from laterally opposite sides of the distal forming shell
[0375] [0375] In several cases, the curvature of the bottom surface 6534 can be dimensioned so that the staple leg does not move along a flat surface during the staple formation process. In such cases, the bottom surface 6543 can encourage the clamp to form in a more flat formed configuration than the clamps formed along the flat bottom surfaces, especially when the clamps are not aligned with the pocket axis 6503 during the formation. The curvature of the bottom surface 6543 can be dimensioned so that the bottom surface 6543 provides a plurality of contact surfaces for the clamp leg. For example, the radius of curvature of the bottom surface 6534 may be less than the radius of curvature of the staple leg.
[0376] [0376] The shell side walls 6513, 6533 are completely curved and not flat surfaces. In other words, the side shell walls 6513, 6533 are devoid of flat, horizontal surfaces. Again with reference to Figures 127 to 129, the
[0377] [0377] The side walls 6533a, 6533b are oriented at an entry angle 82 with respect to the surface of contact with the fabric 6507 in various cross sections of the distal forming shell
[0378] [0378] A reference point in the transition between the side walls
[0379] [0379] A reference line B is also represented in Figures 127 to 129 for illustrative purposes. Reference line B extends between the first reference point A and the perimeter 6520 of the distal forming shell 6530. Reference line B is oriented at an angle 83 in Figures 127 to 129. Angle 83 can determine where the curved sidewall 6533a meets the curved bottom surface 6534. In addition, the slope of sidewall 6533a can be influenced by angle 83. For example, for a constant angle 82, an increase in angle 83 can result in a bigger and deeper shell. In certain cases, the angle 83 can be limited by a minimum desirable pocket width in the deepest portion of the shell. For example, the minimum desirable pocket width may be a requirement of the machining process for the 6501 anvil and / or required by the width of the staple wire.
[0380] [0380] Angle 83 is constant within the transition forming surface zone 6529 (Figure 126) and along most of the length of the distal forming shell 6530. In several cases, angle 03 may be less than the angle 82. The angle 83 in Figures 127 to 129 is approximately 55 degrees, for example. In other cases, the angle 83 can be less than 55 degrees or greater than 80 degrees, for example. Although angles 82 and 8; whether constant along the length of the distal forming shell 6530, or at least along the substantial length of the distal forming shell 6530, the radius of curvature and the length of the arches that define the side walls 6533a, 6533b vary depending on the depth and width of the distal formation shell 6530, they vary along its length.
[0381] [0381] The angle 82 in relation to a contact surface with the fabric can comprise a relatively steep angle. For example, angle 82 can be greater than angles 81 and 83. The slope of angle 82 can encourage the clamp to form along the pocket geometric axis. In addition, a constant angle 82 along the length of the distal forming shell 6530 can encourage an misaligned staple leg to move from the perimeter towards the lateral center or geometric axis 6503 of the shell 6530. As described in the present invention, the pocket depth can vary along the length of the pocket. However, maintaining a constant angle 82 can encourage an misaligned staple leg to move from the perimeter towards the lateral center of the distal forming shell 6530 even in the shallower regions of the 6530 shell.
[0382] [0382] In certain cases, the maximum CD shell depth can vary between staple forming pockets and / or anvil layouts. For example, different depths can be used to form clamps at different heights and / or to form clamps driven by drivers that have different heights, as further described in the present invention. The depth of the pockets can vary along the rows of pockets and / or within one or more rows of pockets, for example. Deeper pockets can provide greater control over the formation of staples; in the
[0383] [0383] Figure 129A is a partial negative view of several slices of a formation pocket of the 6500 formation pocket layout. The dimensions of the various slices are identified therein. The slices are made up of a single side wall of the training pocket and are taken in planes along the training pocket, which are perpendicular to the contact surface with the 6507 fabric and the geometric pocket axis 6503. Each slice comprises a width "x", a height "y", a radius of upper curvature "ra", and a radius of lower curvature "rb". The "x" width is defined as the x component of the distance between the perimeter 6520 of the training pocket and the bottom radius of curvature 6544 of the training pocket. The "y" height is defined as the y component of the distance between the perimeter 6520 of the training pocket and the bottom radius of curvature 6544 of the training pocket. The upper radius of curvature "ra" is defined as the radius of curvature of a top portion of the side wall. The lower radius of curvature "rb" is defined as the radius of curvature of a lower portion of the side wall. Each dimension includes a number that indicates which slice the dimension corresponds to. For example, slice 1 includes a width "xy", a height "yi", a radius of curvature "ra1", and a radius of curvature "rbi". Figure 129B is a table 6550 comprising the dimensions of the slats 1 to 12 of Figure 129A, in at least one embodiment.
[0384] [0384] Figure 129C is a cross-sectional view of the training pocket layout 6500, taken along the pocket geometry axis 6503. Figure 129C includes various dimensions of the distal training pocket 6530 of the training pocket layout. 6500. The length of the training pocket 6530 is 1.90 mm, for example. The depth of the 6530 training pocket is 0.40 mm, for example. In certain instances, the distal training pocket 6530 comprises three radii of curvature: an entrance radius of curvature that is 1.90 mm, a first radius of curvature of exit that is 1.00 mm, and a second radius output curvature which is 0.10 mm, for example. The width of the bridge portion of the distal formation pocket 6530 is defined, in this case, as the distance between the center of the formation pocket arrangement 6500 and the innermost edge of the first radius of curvature outward (the edge of the first exit radius of curvature closest to the center of the training pocket layout 6500) is 0.10 mm, for example. The bridge depth is 0.05 mm, for example.
[0385] [0385] Figures 130 to 135 represent another formation pocket arrangement 6600 on the anvil 6501. The formation pocket arrangement 6600 is configured to deform a staple during a surgical stapling procedure, and comprises a shell, or pocket, of proximal formation 6610 and a cup, or pocket, of distal formation 6630 defined on the flat surface, or in contact with the fabric, 6507 of the anvil 6501. The formation pocket layout 6600 can be similar in many ways to the pocket layout of formation 6500. For example, the side walls of the staple forming shells 6610, 6630 can cross the flat surface 6507 at the same constant entry angle 82 along the length of the same. Although the entry angles of side wall 82 may be the same for shells 6610 and 6630 as for shells 6510 and 6530 (Figures 123 to 129), the depth of the maximum CD shell may be different, as further described in the present invention. In such cases, the side walls of the shallower pockets may
[0386] [0386] In other cases, the 6600 training pocket layout can be set on a different anvil. For example, the 6501 anvil may not include different training pocket arrangements. Instead, an anvil, such as the 6501 anvil, may consist of uniform or identical training pocket arrangements, for example. In certain cases, the 6600 training pocket layout may be the only training pocket layout on a specific anvil.
[0387] [0387] Each shell 6610, 6630 is defined by a contour surface as further described in the present invention. The pockets 6610, 6630 are aligned along a pocket geometry axis 6603 of the training pocket layout 6600. A clamp is intended to be formed along the pocket axis 6603 by the training pocket layout 6600 when deployed from staple cartridge. For example, a first staple leg can be formed by the proximal forming shell 6610 and a second staple leg can be formed by the distal forming shell 6630. In such cases, the first staple leg is aligned with a portion of the proximal forming shell 6610 and the second leg of the staple is aligned with a portion of the distal forming shell 6630 when anvil 6501 is attached in relation to the staple cartridge.
[0388] [0388] Referring to Figures 131 and 132, the formation pocket arrangement 6600 further comprises a bridge portion 6605 defined between the formation shells 6610, 6630. The bridge portion 6605 is lowered in relation to the flat surface 6507 of the anvil 6501, however, the bridge portion 6605 can be leveled with the flat surface 6507. The bridge portion 6605 comprises a bridge width BW and a bridge depth BD (Figure 135). The bridge depth BD is the distance that the lower portion of the bridge portion 6605 is lowered from the flat surface 6507. The width of bridge BW is the width of the pocket arrangement 6600 between the shells 6610, 6630. In this example, the width of the BW bridge is the narrowest section of the forming surfaces of each shell 6610, 6630. The formation pocket arrangement 6600 comprises a center C (Figures 130 and 131) defined within the bridge portion 6605. A formation pocket 6600 is bilaterally symmetrical with respect to bridge portion 6605, bilaterally symmetrical with respect to pocket geometry axis 6603, and rotationally symmetrical with respect to center C.
[0389] [0389] The training pocket layout 6605 additionally comprises a pair of primary side walls 6608 that extend from the flat surface 6507 of the anvil 6501 towards the shells 6610, 6630 and the bridge portion 6605. The primary side walls 6608 are inclined at an angle 81 (Figures 133 to 135) with respect to the flat surface 6507 of the anvil 6501. The shells 6610, 6630 define a perimeter 6620 and the inner edges of the primary side walls 6608 extend between the flat surface 6507 and the perimeter 6620 of shells 6610, 6630. With reference mainly to Figure 131, the inner edges of primary side walls 6608 are curved, or contoured, with respect to shells 6610, 6630.
[0390] [0390] In certain cases, the formation pocket arrangement 6600 may not include the primary side walls 6608. In such cases, the shells 6610, 6630 may extend directly to the flat surface 6507 and the perimeter 6620 of the shells 6610, 6630 can be set on the flat surface 6507.
[0391] [0391] Again with reference to Figures 131 and 132, the proximal forming shell 6610 comprises a pair of shell side walls 6613 and the distal forming shell 6630 comprises a pair of shell side walls 6633. The shell side walls 6613 , 6633 comprise curved or contoured profiles and are configured to direct the staple tips and staple legs towards the 6610, 6630 shell forming surfaces, as well as help control the staple formation process. The side walls 6613, 6633 extend from the primary side walls 6608 and the flat surface 6507 towards the forming surfaces of each shell 6610, 6630. The side walls 6613, 6633 are configured to encourage staple tips and / or the legs of the staples to form along the geometric axis of pocket 6603 as the staples are formed against the shell forming surfaces 6610, 6630. Collectively, the primary side walls 6608 and the side shell walls 6613 , 6633 cooperate to taper the corresponding clamp tips towards the lateral center of each 6610, 6630 shell. A surface inflection, or bottom surface, 6614, 6634 extends along the lateral center of each respective 6610 dome, 6630 of the respective side walls 6613 intermediate, 6633.
[0392] [0392] Referring further to Figure 131, the shell forming surfaces 6610, 6630 comprise an input zone forming surface 6611, 6631, respectively, and an output zone forming surface 6612 , 6632, respectively. The forming surfaces of the entry zone 6611, 6631 may coincide with the less aggressive channeling portions of the side walls 6613, 6633. Similarly, the forming surfaces of the exit zone 6612, 6632 may coincide with the more aggressive plumbing portions of the side walls 6613, 6633.
[0393] [0393] With reference mainly to Figure 132, the forming surfaces of each shell 6610, 6630 are defined by a profile or depth contour. The proximal formation shell 6610 includes the depth profile 6622, and the distal formation shell 6630 includes the depth profile 6642. The depth profiles 6622, 6642 define the depth of the shells 6610, 6630, respectively, at along their length. The shells 6610, 6630 reach a maximum CD shell depth within their respective transition zones 6609, 6629, which are further described below. The depth of the CD shell of the 6610, 6630 pockets can be between 0.2 and 0.4 mm, for example. For example, the depth of the CD shell can be 0.3 mm. In other cases, the CD shell depth may be less than 0.2 mm or greater than 0.4 mm.
[0394] [0394] The CD shell depth of the 6610, 6630 shells is less than the CD shell depth of the 6510, 6530 shells (Figure 126). For example, the CD shell depth of the 6610, 6630 shells can be 0.2 millimeters less than the CD shell depth of the 6510, 6530 shells. In certain instances, the CD shell depth of the 6610, 6630 shells can be be 0.1 millimeter to 0.3 millimeter less than the CD shell depth of the 6510, 6530 shells. The CD shell depth of the 6510, 6530 shells can be 25% to 50% greater than the CD shell depth. CD shell of the 6610, 6630 shells. For example, the CD shell depth of the 6510, 6530 shells can be 40% greater than the CD shell depth of the 6610, 6630 shells. In many cases, the difference between the depth of CD shell of the training pocket provisions 6500 and 6600 can be selected to be equal to, or substantially equal to, the diameter of a clamp formed by the pocket forming provisions 6500, 6600.
[0395] [0395] Depth profiles 6622, 6642 are curved profiles,
[0396] [0396] The outer longitudinal edges of each shell 6610, 6630 are called entry edges because they define the beginning of the forming surfaces of the entry zone 6611, 6631. The entry edges comprise an entry width that is the greater width of the forming surfaces of each shell 6610, 6630. The inner edges of each shell 6610, 6630 are called exit edges because they define the end of the forming surfaces of the exit zone 6612, 6632. The edges of The outlet width comprises an outlet width, also called the BW bridge width (Figure 135), which is the narrowest section of the forming surfaces of each shell 6610, 6630. A transition zone 6609, 6629 is positioned in - intermediate to the entry and exit area of each shell. Transition zones 6609, 6629 have a transition width that is less than the entry width, but greater than the exit width. Transition zones 6609, 6629 include an inflection portion of the respective depth profiles 6622, 6642 and thus include the deepest portion of each shell 6610, 6630. In various cases, transition zones 6609, 6629 comprise the most of the length of each shell 6610, 6630. More specifically, the length of the transition zone 6609, 6629 can be greater than the combined length of the respective entry and exit zone of each shell 6610, 6630. The zones transition 6609, 6629 can extend along the tapered or narrowing section of each 6610, 6630 shell. For example, each 6609, 6629 transition zone can extend inward from the widest section of the respective 6610 shell. , 6630 towards bridge 6605.
[0397] [0397] Figure 134 is a cross-sectional view of the distal formation shell 6630 taken along line 134-134 in Figure
[0398] [0398] Referring mainly to Figures 133 to 135, the pair of shell side walls 6633 of the distal forming shell 6630 includes a first side wall 6633a and a second side wall 6633b. The first and second side walls 6633a, 6633b are opposite side walls that extend towards each other from laterally opposite sides of the distal forming shell
[0399] [0399] In several cases, the curvature of the bottom surface 6634 can be dimensioned so that the staple leg does not move along a flat surface during the staple formation process. In such cases, the bottom surface 6643 can encourage staples to form in a flatter formed configuration than staples formed along flat bottom surfaces, especially when the staples are not aligned with the geometric axis 6603 from the pocket during training. The curvature of the bottom surface 6643 can be dimensioned so that the bottom surface 6643 provides a plurality of contact surfaces for the clamp leg. For example, the radius of curvature of the bottom surface 6634 may be less than the radius of curvature of the clamp leg.
[0400] [0400] The shell side walls 6613, 6633 are completely curved and not flat surfaces. In other words, the side shell walls 6613, 6633 are devoid of flat, horizontal surfaces. Again with reference to Figures 133 to 135, side walls 6633a, 6633b define one or more radii of curvature. For example, in various longitudinal positions along pocket geometry 6603, side walls 6633a, 6633b define different radii of curvature. The completely curved contours of the side shell walls 6613, 6633 and the bottom surface 6634 can define the curvilinear contour surfaces of the 6610, 6630 shells. The 6613, 6633 shells can be fully curved and stripped surfaces. flat and horizontal surfaces.
[0401] [0401] The side walls 6633a, 6633b are oriented at an entry angle 82 with respect to the surface of contact with tissue 6507 in various cross sections of the distal forming shell
[0402] [0402] A reference point in the transition between the side walls 6633a, 6633b and the bottom surface 6634 is indicated for illustrative purposes in Figures 133 to 135. For example, the con-
[0403] [0403] A reference line B is also shown in Figures 133 to 135 for illustrative purposes. Reference line B extends between the first reference point A and the perimeter 6620 of the distal formation cup 6630. Reference line B is oriented at an angle 83 in Figures 133 to 135. Angle 83 is constant within the transition forming surface area 6629 (Figure 132) and along most of the length of the distal forming shell 6630. In many cases, the angle 83 may be less than the angle
[0404] [0404] The angle 82 in relation to a contact surface with the fabric can comprise a relatively steep angle. For example, angle 82 can be greater than angles 81 and 83. The slope of angle 82 can encourage the clamp to form along the axis.
[0405] [0405] Pocket arrangements that have different PB bag depths can be sized to have the same angles 82 and
[0406] [0406] Figures 143 and 144 show a clamp 6701 formed with the formation pocket layout 6600 (Figures 130 to 135), with the clamp 6701 being aligned with the geometric axis 6603 of the pocket of the formation pocket layout 6600 during the training process. Figure 143 represents a top view of the 6701 clamp in a fully formed configuration and Figure 144 represents a side view of the 6701 clamp in the fully formed configuration. The clamp includes a base 6702 and clamp legs 6703 extending from the base 6702. The base 6702 is aligned with the geometric axis 6603 of the pocket and the tips 6704 of the clamp legs 6703 reach the formation pocket arrangement 6600 along the pocket 6603 geometric axis.
[0407] [0407] The 6701 clamp comprises a CL centerline (Figure 144) that cuts the base 6702 and extends vertically between the 6703 unformed clamp legs. As the 6701 clamp is formed in the fully formed configuration, the ends 6704 of the clamp legs 6703 are curved towards the centerline CL and towards the base 6702. The clamp legs 6703 are formed so that the clamp 6701 defines a height H (Figure 144) when in the fully formed configuration. The height H can be less than the height of clamp 6701 if the clamp was formed with the formation pocket arrangement 6500 (Figures 123 to 129) because the CD shell depth of the 6610, 6630 shells (Figure 132) is less than the CD shell depth of shells 6510, 6530 (Figure 126).
[0408] [0408] To reach the shortest height H, a portion of the 6703 staple legs can deflect laterally in relation to the centerline CL and / or the 6704 ends of the 6702 staple legs can be deflected
[0409] [0409] Figure 135A is a partial negative view of several slices of a formation pocket of the formation pocket layout 6600. The dimensions of the various slices are identified therein. The slices are of a single side wall of the training pocket and are taken in planes along the training pocket that are perpendicular to the surface of contact with the fabric 6507 and to the pocket geometry axis 6603. Each slice comprises a width "x", a height "y", a radius of upper curvature "ra", and a radius of lower curvature
[0410] [0410] Figure 135C is a cross-sectional view of the training pocket layout 6600, taken along the pocket geometry axis 6603. Figure 135C includes various dimensions of the distal training pocket 6630 of the training pocket layout. 6600. The length of the 6630 training pocket is 1.90 mm, for example. The depth of the 6630 training pocket is 0.30 mm, for example. In certain instances, the distal formation pocket 6630 comprises three radii of curvature: an entrance radius of curvature that is 2.90 mm, a first radius of curvature of exit that is 0.70 mm, and a second radius output curvature which is 0.10 mm, for example. The width of the bridge portion of the distal formation pocket 6630 is defined, in this case, as the distance between the center of the formation pocket arrangement 6600 and the innermost edge of the first radius of curvature exit (the edge of the first exit radius of the curvature closest to the center of the formation pocket layout 6600) is 0.10 mm, for example. The bridge depth is 0.05 mm, for example.
[0411] [0411] Figures 136 to 142 represent a 6800 training pocket arrangement that is configured to deform a staple during a surgical stapling procedure. The formation pocket 6800 arrangement comprises a shell, or pocket, of proximal formation 6810 and a shell, or pocket, of distal formation 6830 defined on a flat surface, or in contact with the tissue, 6807 of an anvil 6801. The fabric contact surface 6807 of the anvil 6801 is configured to compress the fabric against a staple cartridge when the anvil 6801 is attached or closed in relation to the staple cartridge. The 6800 training pocket layout can be similar in many ways to the training pocket layout
[0412] [0412] Referring to Figures 137 and 138, the 6800 training pocket arrangement additionally comprises a bridge portion
[0413] [0413] The 6800 training pocket arrangement further comprises a pair of primary side walls 6808 that extend from the flat surface 6807 of the anvil 6801 towards the shells 6810, 6830 and the bridge portion 6805. The primary side walls 6808 are inclined at an angle 8; (Figure 139) in relation to the flat surface 6807 of the anvil 6801. The shells 6810, 6830 define a perimeter 6820 and the inner edges of the primary side walls 6808 extend between the flat surface 6807 and the perimeter 6820 of the shells 6810 , 6830. Referring primarily to Figure 137, the inner edges of primary side walls 6808 are curved, or contoured, with respect to the 6810, 6830 shells. In some cases, the 6800 training pocket arrangement may not include the primary side walls 6808. In such cases, the shells 6810, 6830 can extend directly to the flat surface 6807 and the perimeter 6820 of the shells 6810, 6830 can be defined on the flat surface 6807.
[0414] [0414] Again with reference to Figures 137 and 138, the proximal forming shell 6810 comprises a pair of shell side walls 6813 and the distal forming shell 6830 comprises a pair of shell side walls 6833. The shell side walls 6813 , 6833 comprise curved or contoured profiles and are configured to direct the staple tips and staple legs towards the 6810, 6830 shell forming surfaces, and also to help control the staple formation process. The side walls 6813, 6833 extend from the primary side walls 6808 and the flat surface 6807 towards the forming surfaces of each shell 6810, 6830. The side walls 6813, 6833 are configured to encourage staple tips and / or staple legs to form along the geometric axis of pocket 6803 as staples are formed against pocket forming surfaces 6810, 6830. Collectively, primary side walls 6808 and shell side walls 6813, 6833 cooperate to taper the corresponding clamp tips towards the side center of each shell 6810, 6830. An inflection surface, or bottom surface, 6814, 6834 extends along the lateral center of each respective shell 6810, 6830 between the walls 6813, 6833.
[0415] [0415] With reference also to Figure 137, the forming surfaces of the shells 6810, 6830 comprise a forming surface of the entry zone 6811, 6831, respectively, and a forming surface of the exit zone 6812 , 6832, respectively. The forming surfaces of the entrance zone 6811, 6831 may coincide with the less aggressive channeling portions of the side walls 6813, 6833. Similarly, the forming surfaces of the zone
[0416] [0416] Referring mainly to Figure 138, the forming surfaces of each shell 6810, 6830 are defined by a depth profile or contour. The proximal formation shell 6810 includes the depth profile 6822, and the distal formation shell 6830 includes the depth profile 6842. The depth profiles 6822, 6842 define the depth of the shells 6810, 6830, respectively, at the along their length. The shells 6810, 6830 reach a maximum CD shell depth within their respective transition zones 6809, 6829, which are further described below. The CD shell depth of the 6810, 6830 pockets can be between 0.4 and 0.6 mm, for example. For example, the depth of the CD shell can be 0.5 millimeter. In other cases, the CD shell depth may be less than 0.4 millimeter or greater than 0.6 millimeter.
[0417] [0417] The depth profiles 6822, 6842 are curved profiles, which are devoid of linear portions. In addition, the depth profiles 6822, 6842 can comprise one or more bend radii. In this case, depth profiles 6822, 6842 include more than one radius of curvature. Specifically, the depth profile 6822 of the proximal forming shell 6810 comprises an entrance bend radius 6817 which corresponds to the formation surface of the entrance zone 6811 and an exit bend radius 6818 which corresponds to the formation surface of the exit zone. 6812. Similarly, the depth profile 6842 of the distal forming shell 6830 comprises an inlet radius of curvature 6837 which corresponds to the forming surface of the entrance zone 6831 and an outward radius of curvature 6838 corresponding to the forming surface of the exit zone 6832. In this case, the incoming radii of curvature
[0418] [0418] The outer longitudinal edges of each shell 6810, 6830 are called entry edges because they define the beginning of the forming surfaces of the entry zone 6811, 6831. The entry edges comprise an entry width that is the greater width of the forming surfaces of each shell 6810, 6830. The inner edges of each shell 6810, 6830 are called the exit edges because they define the end of the forming surfaces of the exit zone 6812, 6832. The edges of The outlet width comprises an outlet width, also called the BW bridge width (Figure 142), which is the narrowest section of the forming surfaces of each shell 6810, 6830. A transition zone 6809, 6829 is positioned in - intermediate to the entry and exit area of each shell. Transition zones 6809, 6829 have a transition width that is less than the entry width, but greater than the exit width. Transition zones 6809, 6829 include an inflection portion of the respective depth profiles 6822, 6842 and thus include the deepest portion of each shell 6810, 6830. In several cases, transition zones 6809, 6829 comprise the most of the length of each shell 6810, 6830. More specifically, the length of the transition zone 6809, 6829 can be greater than the combined length of the respective inlet and outlet zone of each shell 6810, 6830. The zones transition zone 6809, 6829 can extend along the tapered or narrowing section of each shell 6810, 6830. For example, each transition zone 6809, 6829 can extend inward from the widest section of the respective shell 6810 , 6830 towards bridge 6805.
[0419] [0419] Figure 141 is a cross-sectional view of the distal formation shell 6830 taken along line 141-141 in Figure
[0420] [0420] Referring mainly to Figures 139 to 142, the pair of shell side walls 6833 of the distal forming shell 6830 includes a first side wall 6833a and a second side wall 6833b. The first and second side walls 6833a, 6833b are opposite side walls that extend towards each other from laterally opposite sides of the distal forming shell
[0421] [0421] In many cases, the curvature of the bottom surface 6834 can be dimensioned so that the staple leg does not move along a flat surface during the staple formation process. In such cases, the 6843 bottom surface may encourage the clamps to form in a more flat formed configuration than the clamps formed with the flat bottom surfaces, especially when the clamps are not aligned with the 6803 geometric axis. during training. The curvature of the bottom surface 6843 can be dimensioned so that the bottom surface 6843 provides a plurality of contact surfaces for the clamp leg. For example, the radius of curvature of the bottom surface 6834 may be less than the radius of curvature of the staple leg.
[0422] [0422] The shell side walls 6813, 6833 are completely curved and not flat surfaces. In other words, the side shell walls 6813, 6833 are devoid of flat, horizontal surfaces. The sidewalls 6833a, 6833b define one or more curves. For example, in various longitudinal positions along the geometric axis 6803 of the pocket, the side walls 6833a, 6833b define different radii of curvature. The fully curved contours of the shell side walls 6813, 6833 and the bottom surface 6834 can define the curvilinear contour surfaces of the shells 6810, 6830. The shells 6813, 6833 can be completely curved surfaces and devoid of flat and horizontal surfaces .
[0423] [0423] The side walls 6833a, 6833b are oriented at an entry angle 82 with respect to the surface of contact with the 6807 tissue in various cross sections of the distal forming shell
[0424] [0424] A reference point in the transition between the side walls 6833a, 6833b and the bottom surface 6834 is indicated for illustrative purposes in Figures 139 to 142. For example, the curved contour surface of the distal formation shell 6830 includes a reference point A at the transition between the side wall 6833a and the bottom surface 6834. In each longitudinal position along the shell 6530, the first side wall 6833a and the second side wall 6833b define a radius of curvature of the side wall 6843 and the base surface 6834 defines a radius of curvature at the bottom 6844. The radius of curvature at the bottom 6844 may differ from the radius of curvature at the wall 6843. The transition between the radii curvature at reference point A comprises a non-abrupt and smooth transition.
[0425] [0425] A reference line B is also represented in Figures 139 to 142 for illustrative purposes. Reference line B extends between the first reference point A and the perimeter 6820 of A of the distal formation shell 6830. Reference line B is oriented at an angle 83 in Figures 139 to 142. Angle 83 is changes along the length of the distal formation shell 6830. In many cases, the angle 83 can be less than the angle 82 along the length of the distal formation shell 6830. The angle 83 can increase and then decrease with the walls sides 6833a, 6833b extend inward towards center C. For example, angle 83 can increase from the entry edge of shell 6830 towards transition zone 6829, remain constant within transition zone 6829, and decrease from the transition zone 6829 towards the exit edges of the 6830 shell. In the represented embodiment, the angle 83 is 45 degrees in Figure 139, the angle 83 is 55 degrees in Figure 140, the angle 93º is 70 degrees in Figure 141, and the 83 "angle is 55 degrees in Figure. 1 42, for example. Although the angles 82 and 83 are constant in the transition zone 6829 of the distal forming shell 6830, the radius of curvature and the length of the arches that define the side walls 6833a, 6833b vary according to the depth and width of the forming shell distal 6830 varies over its length.
[0426] [0426] The angle 82 in relation to a contact surface with the fabric can comprise a relatively steep angle. For example, angle 82 can be greater than variable angle 83. The slope of angle 82 can encourage the clamp to form along the pocket geometric axis. A constant angle 82 can encourage an misaligned staple leg to move from the perimeter towards the lateral center of the shell. In several cases, angle 82 can be constant and steep within the exit zone, which can improve the quality of clamp formation. Additionally or alternatively, the angle 82 can be constant in the transition zone. As described in the present invention, the pocket depth can vary over the length of the pocket. However, maintaining a constant angle 82 can encourage an misaligned staple leg to move from the perimeter towards the lateral center of the shell even in the shallower regions of the shell. In addition, the maximum depth of the CD shell on certain anvils can vary between the pockets on the anvil. For example, different depths can be used to form clamps at different heights and / or to form clamps driven by drivers that have different heights, as further described in the present invention. In such cases, a constant angle 82 can encourage staples formed by the shallower pockets to form along the pocket geometric axis.
[0427] [0427] In certain cases, an anvil for a surgical end actuator may include staple forming pockets of different depths. For example, the depth of the staple forming pockets can vary between the rows of forming pockets and / or longitudinally along the length of a row of forming pockets. Such depth differences can be selected to accommodate variations in the travel of the staple actuators within a staple cartridge during a staple firing stroke, variations in the overload distance of the triggered staples, and / or the position of the anvil. in relation to the staple cartridge. Additionally or alternatively, the differences in depth between the staple forming pockets may correspond to the different fabric spans between the fabric compression surfaces stepped on the anvil and / or a staple cartridge. For example, to form staples formed at the same height, when the staples are driven by actuators having different lifting lengths, which result in different amounts of staple overheating, a difference in depth between the formation pockets. clamps can be selected that correspond to the different stroke lengths and the different quantities of clamp combination. In other cases, staple forming pockets with different depths on an anvil can be selected to form staples formed at different heights, which may be desirable in certain cases, to vary the compression of the stapled fabric and / or to accommodate variations in tissue thickness.
[0428] [0428] Figure 142A is a partial negative view of several slices of a formation pocket in the formation pocket layout.
[0429] [0429] Figure 142C is a cross-sectional view of the device.
[0430] [0430] Now with reference to Figure 145, a 7000 surgical end actuator is shown that comprises an anvil 7001 and a staple cartridge 7060 that has a plurality of staples
[0431] [0431] In the closed position, a uniform TG fabric gap is defined between the staple cartridge 7060 and the anvil 7001. In other words, the TG fabric gap is constant laterally along the 7000 end actuator. The cartridge staple 7060 includes a flat or substantially flat tissue compression surface or platform 7062 and the anvil 7001 also includes a flat or substantially flat tissue compression surface 7007. The 7060 staple cartridge platform 7062 and the tissue compression surface 7007 of the anvil 7001 does not include a stepped surface having longitudinal steps between adjacent longitudinal portions. In other cases, as described here, the staple cartridge platform and / or the tissue compression surface of an anvil may include a stepped profile.
[0432] [0432] The staple cartridge 7060 includes a staple cartridge body 7064 that has a longitudinal slot 7065 and a plurality of staple cavities 7066 defined therein. Slit 7065 extends along a central longitudinal geometric axis of the staple cartridge 7060. Each staple cavity 7066 comprises an opening in the platform 7062. The staple cavities 7066 are arranged in a plurality of longitudinally extending rows 7068 including a first row, or outer row, 7068a, a second row, or intermediate row, 7068b, and a third row, or inner row, 7068c on each side of the 7065 slot. In other cases, the 7060 staple cartridge may have fewer or more than six rows of staple cavities 7066. For example, a staple cartridge can have two rows of staple cavities on each side of the 7065 longitudinal slot.
[0433] [0433] One 7080 clamp is removably stored in each 7066 clamp cavity, and each 7080 clamp is supported by a 7070 clamp driver. In many cases, a 7070 clamp driver can hold and fire more than one 7080 clamp. For example, a trigger can be configured to simultaneously trigger staples from adjacent rows of staple cavities into a staple cartridge. The 7062 platform includes cavity extenders 7061 that protrude from the platform 7062 towards the tissue compression surface 7007 of the anvil 7001. The 7061 cavity extenders are positioned around at least a portion of the cavities of the anvil. clamp 7066 and 7080 can guide the clamps above the 7062 platform. The 7061 cavity extenders can also be configured to engage or secure the fabric and / or support the 7080 clamps and / or the 7070 actuators during firing. In other cases, the 7062 platform may be devoid of cavity extenders and may comprise a smooth fabric contact surface, for example.
[0434] [0434] The clips 7080 in Figure 145 are shown in a formed configuration in which the clips 7080 fired from cavities 7066 through rows 7068a, 7068b, 7068c on both sides of the slot 7065 were formed at the same height H The formation of staples of an even height can firmly tighten the tissue and reduce bleeding from it.
[0435] [0435] The 7070 actuators are movably positioned in the 7066 cavities. During a firing stroke, a firing member is configured to lift the 7070 actuators towards the 7001 anvil, which activates the 7080 clamps supported on the 7070 actuators to be formed engaging with the anvil 7001. Each clamp 7080 is activated to form the contact with a clamp-forming pocket arrangement 7002, 7004 defined on the flat surface 7007 of the anvil 7001. The pocket-forming arrangements of staples 7002, 7004 are arranged in a plurality of longitudinally extending rows 7003 including a first row, or outer row,
[0436] [0436] The 7001 anvil includes two different clamp-forming pocket arrangements. More specifically, anvil 7001 includes a first staple forming pocket arrangement 7002 that comprises a first geometry and a second staple forming pocket arrangement 7004 that comprises a second arrangement geometry. The first staple forming pocket arrangements 7002 are aligned with the outermost row 7068a of staple cavities 7066 on both sides of the slot 7065, and the second staple forming pocket arrangements 7004 are aligned with rows 7068b , 7068c of the staple cavities 7066 on both sides of the slot 7065. The shells of the first staple forming pocket arrangement 7002 define a depth of shell CD in relation to the flat surface of the anvil 7007 and the shells of the second arrangement of staple formation pocket 7004 define a CD2 shell depth in relation to the flat surface of the anvil 7007. The depth of the CD shell of the staple formation pocket 7002 is greater than the depth of the CD shell of the dispositions staple forming pocket 7004. As a result, the deeper staple forming pockets of the first layout 7002 are positioned laterally away from the staple forming pockets. s shallower than the second arrangement 7004, although any suitable arrangement may be used.
[0437] [0437] In several cases, the first staple formation pocket arrangements 7002 can be the same or similar to the staple formation pocket layout 6800 (Figures 136 to 142) and the second staple formation pocket layouts 7004 they can be the same or similar to the 6600 staple formation pocket arrangement (Figures 130 to 136). Although the depth of the shells is different between the first formation pocket layout 7002 and the second formation pocket layout 7004, the side walls of the shells can cross the flat surface 7007 at the same angle, that is, a tangent the side walls can be maintained at a constant entry angle, along the length of the shells in each arrangement 7002, 7004 or at least over most of the length of the shells in each arrangement 7002, 7004. As described in the present invention, a steep side wall of constant angle is configured to facilitate the flat formation of the 7080 clamps, including clamps that are out of alignment with the central axis of the arrangement 7002, 7004.
[0438] [0438] In the triggered position shown in Figure 145, the 7080 clamps were overreacted relative to the 7064 clamp cartridge body. More specifically, the clamp support surface of each 7070 actuator was driven in addition to the clamp cartridge body 7064 so that the 7080 clips are completely removed from the 7064 cartridge body during firing. When activated in excess, the support, or lower surface, of each 7080 clamp is positioned above the 7062 platform and / or above the 7061 cavity extenders that project from the plate.
[0439] [0439] In several cases, different clamps can be over-operated by different amounts. For example, staples 7080 fired from the outer rows of staple cavities 7066 are removed at a first distance D; in relation to the platform surface 7062 and the clamps 7080 fired from the intermediate and internal rows 7068b, 7068c of the clamp cavities 7066 are replaced in a second distance D2 in relation to the platform surface 7062. The distances D: and D2 in the Figure 145 are the distances between the support of the 7080 clamps and the flat platform surface
[0440] [0440] To obtain the different overload distances D: and D2 in Figure 145, the stroke length of the 7070 actuators can be different. For example, the trigger member can be configured to lift the 7070 actuators that support the 7080 clamps in the outer rows 7068a in a first distance and the 7070 actuators that support the 7080 clamps in the inner rows 7068b, 7068c in a second distance. In certain cases, the geometry of the slider can be selected to control the different stroke lengths of the 7070 actuators. In addition or alternatively, the geometry of the 7070 actuators, such as the height of the actuator, for example, can be selected to control the different driving distances. overload.
[0441] [0441] For each clamp formed 7080 in Figure 145, the sum of the fabric span and the depth of the shell is equal to the sum of the overload distance and the height of the clamp.
[0442] [0442] In certain cases, surgical instruments and / or subsets of them can be modular. Different types of staple cartridges may be compatible with more than one anvil and / or different types of anvils may be compatible with more than one staple cartridge. For example, the staple cartridge 7060, which is compatible with the anvil 7001, having a flat tissue compression surface 7007 (see, for example, Figure 145) can also be compatible with a stepped anvil. An end actuator that includes the 7060 staple cartridge and a compatible stepped bib can define a laterally variable TG fabric gap; however, such an end actuator can still be configured to form clamps at a constant formed height. In such cases, the different overload distances D: and D> may correspond to different heights of a compression surface.
[0443] [0443] Now with reference to Figure 146, an end actuator 7100 is shown with the staple cartridge 7060 and a mustache 7101. The end actuator 7100 is in a closed or clamped position. In use, the anvil 7101 can be pivoted in relation to the staple cartridge 7060 to move the end actuator 7100 to the closed position and secure the fabric between the anvil 7101 and the staple cartridge 7060. In other cases, the anvil 7101 can be fixed and the staple cartridge 7060 can rotate in relation to the anvil 7101 to move the end actuator 7100 to the closed position, and in still other cases, both the anvil 7101 and the staple cartridge 7060 can be configured to rotate the end actuator 7100 towards the closed position.
[0444] [0444] Anvil 7101 includes a staggered tissue compression surface 7107 that has longitudinal steps between adjacent longitudinal portions. More specifically, anvil 7101 includes a plurality of longitudinal portions 7110 including a first portion, or outer portion, 7110a and a second portion, or inner portion, 7110b on each side of anvil 7101. A step 7112 is positioned between the outer portion 7100a and the inner portion 7100b. Step 7112 extends parallel to the rows of the staple forming pocket arrangements 7102 defined on the surface 7107 and extends along a geometric axis positioned between the adjacent rows of the staple forming pocket arrangements 7102.
[0445] [0445] Step 7112 comprises a Hetapa height, which corresponds to the height difference between the first longitudinal portion 7110a and the second longitudinal portion 7110b of the tissue compression surface 7107. Since the staple cartridge 7060 includes a platform unstaggered 7062, the height Hetapa corresponds to the variation in the fabric gap between the staple cartridge 7060 and the anvil
[0446] [0446] The staples 7080 in Figure 146 are represented in the configuration formed in which the staples 7080 fired from rows 7068a, 7068b, 7068c of staple cavities 7066 on both sides of the slit 7065 were formed with the same height H. During a clamp firing stroke, a firing member is configured to lift the 7070 actuators towards the anvil 7101, which activates the 7080 clamps supported on the 7070 actuators to form the engagement with the 7101 anvil. More specifically, each staple 7080 is activated to form contact with one of the staple forming pocket arrangements 7102 defined on the fabric compression surface 7107 of the anvil 7101. The staple forming pocket arrangements 7102 are arranged in a plurality of longitudinally extending rows 7103 including a first row, or outer row, 7103a, a second row, or intermediate row, 7103b, and a third row, or inner row, 7103c on both sides of the anvil 7101. The first longitudinal portion 7110a includes the first row 7103a, and the second longitudinal portion 7110b includes the second and third rows 7103b, 7103c. Each row 7068 of staple cavities 7066 is aligned with a row 7103 of the staple forming pocket arrangements 7102. As described with respect to the various staple forming pocket arrangements described in the present invention, each forming pocket arrangement staple 7102 includes a pair of forming pockets, or shells, for example, a shell proximal to a distal shell, and each shell is positioned to receive a staple leg when the 7080 clamp is triggered to form contact with the anvil
[0447] [0447] Staple forming pocket arrangements 7102 define a shell depth relative to the fabric compression surface 7107. In several cases, staple forming pocket arrangements 7102 are the same or similar to the arrangements 6600 staple formation pocket (Figures 130 to 135). In such cases, the side walls of the shells can cross the compression surface of fabric 7107 at a constant angle, that is, a tan to the side walls can be maintained at a constant entry angle, along the length of the shells. shells or at least along most of the length of the shells. A steep sidewall at a constant angle along the length of the shells is configured to facilitate the flat formation of the 7080 clamps, including the clamps that are out of alignment with the central axis of the clamp forming arrangement 7102.
[0448] [0448] For each clamp formed 7080 in Figure 146, the sum of the fabric span and the depth of the shell is equal to the sum of the overload distance and the clamp height. For example: TG + CD = D, + H; and TG, + CD = D, + H.
[0449] [0449] Above certain limit loads, anvil 7101 may be prone to bending along step 7112, so that the span of fabric along the lateral sides of anvil 7101 is greater than the span of TG fabric, represented in Figure 146. As a result, anvil 7001 (Figure 145) may be more rigid than anvil 7101 because anvil 7001 comprises a flat, or non-staggered, tissue compression surface 7007. Anvil 7001 may be more rigid, and therefore way, less prone to flexion and / or deflection when subjected to high compression loads during tightening and / or firing.
[0450] [0450] In several cases, it may be desirable to use an anvil that has a flat, or unscaled, compression surface, such as the anvil 7001, to minimize deflection of the anvil along its lateral sides. In certain instances, a variable tissue gap may also be desirable to control tissue flow and / or the amount of tissue compressed and finally captured by the end actuator. For example, a smaller external tissue gap and a larger internal tissue gap may allow the end actuator to capture a greater amount of tissue adjacent to the cut line, which can improve hemostasis. The smaller external tissue gap can optimize control over tissue flow and ensure that the lateral sides of the end actuator effectively hold and engage the target tissue. In addition, the larger internal fabric gap can allow the end actuator to capture a larger, for example, thicker piece of fabric.
[0451] [0451] An example actuator with variable tissue gap 7200 is shown in Figure 147. The end actuator 7200 includes anvil 7001 that has a flat, or non-stepped, compression surface 7007 (see also Figure 145) and a staple cartridge 7260 that has a stepped platform 7262. Although the fabric span varies laterally through end actuator 7200, end actuator 7200 can be configured to form staples 7280 to a constant formed height . For example, different staple overload distances can correspond to different fabric spans and / or different staple forming arrangements having different shell depths, as further described in the present invention.
[0452] [0452] With reference also to Figure 147, the end actuator 7200 is in a closed or tight position. In use, the anvil 7001 can be pivoted in relation to the staple cartridge 7260 to move the end actuator 7200 to the closed position and secure the fabric between the anvil 7001 and the staple cartridge 7260. In others cases, the anvil 7001 can be fixed and the staple cartridge 7260 can rotate in relation to the anvil 7001 to move the end actuator 7200 to the closed position and, in other cases, both the anvil 7001 and the staple cartridge 7260 can be configured to rotate to move the 7200 end actuator towards the closed position.
[0453] [0453] The staple cartridge 7260 includes a staple cartridge body 7264 that has a longitudinal slot 7265 and a plurality of staple cavities 7266 defined therein. 7280 clamps are removably positioned in the clamp cavities
[0454] [0454] Each 7280 clamp is supported on a 7270 clamp trigger. In several cases, a 7270 clamp trigger can hold and trigger more than one 7280 clamp. For example, a trigger can be configured to trigger clamps from filei - adjacent strips of staple cavities in a staple cartridge. The 7262 platform includes cavity extenders 7261 that project from the platform 7262 towards the tissue compression surface 7007 of the anvil 7001. The cavity extenders 7261 are positioned around at least a portion of the clamp cavities 7266 and can guide the clips as they are ejected from the 7266 staple cavities. The 7261 cavity extenders can also be configured to engage or secure the fabric and / or support the 7280 staples and / or the 7270 actuators during firing, for example example. In other cases, the 7262 platform may be free of cavity extenders and may comprise a smooth tissue contact surface, for example.
[0455] [0455] Staples 7280 in Figure 147 are shown in a formed configuration in which staples 7280 fired from cavities 7266 through rows 7268a, 7268b, 7268c on both sides of the slot 7265 were formed at the same height H In certain cases, it may be advantageous to form staples over multiple files.
[0456] [0456] The 7270 actuators are movably positioned in the 7266 cavities. During a firing stroke, a firing member is configured to lift the 7270 actuators towards the anvil 7001, which activates the 7280 clamps supported on the 7070 actuators to be formed engaging with the anvil 7001. Each clamp 7280 is fired to form a clamp forming pocket arrangement 7002, 7004. Each row 7268 of clamp cavities 7266 is aligned with a row 7003 of arrangement staple forming pocket 7002, 7004. The first staple forming pocket arrangements 7002 are aligned with the outermost row 7268a of staple cavities 7266 on each side of the slot 7265, and the second staple forming pocket arrangements staples 7004 are aligned with the innermost rows 7268b, 7268c of staple cavities 7266 on each side of slot 7265.
[0457] [0457] The staple cartridge 7260 includes a scaled platform 7262 that has longitudinal steps between adjacent longitudinal portions. More specifically, the staple cartridge 7260 includes a plurality of longitudinal portions 7263 including a first portion, or outer portion, 7263a and a second portion, or inner portion, 7263b on each side of a slit 7260. Step 7267 is positioned between the outer portion 7263a and the inner portion 7263b. Step 7267 extends parallel to rows 7268 of clip cavities 7266 defined on platform 7262 and extends along a geometrical axis positioned between adjacent rows 7268 of clip cavities 7266.
[0458] [0458] Step 7267 comprises a Hetapa height, which corresponds to the height difference between the first longitudinal portion 7263a and the second longitudinal portion 7263b of platform 7262. In addition,
[0459] [0459] In the triggered positions shown in Figure 147, staples 7280 were overreacted relative to the staple cartridge body 7264. More specifically, the staple support surface of each 7270 actuator was driven in addition to the staple cartridge body 7264 so that the staples 7280 are completely removed from the cartridge body 7264 during firing. The support, or lower surface, of each clamp 7280 is positioned above the platform 7262. The supports of certain clamps 7280 are also positioned above the cavity extenders 7261 that project from the platform 7262 and the supports of other clamps 7280 are positioned below and / or flush with the 7261 cavity extenders. The overhead feature of the 7270 actuators can be configured to completely disconnect the severed clips 7280 from the 7260 clamp cartridge and to facilitate the release of the stapled tissue from the 7200 end actuator .
[0460] [0460] In several cases, different clamps can be over-operated by different amounts. For example, clamps 7280 fired from outer rows 7268a of clamp cavities 7266 are overreached at a first distance D1, clamps 7280 fired from intermediate rows 7268b of clamp cavities 7266 are overreached at a second distance D2 with respect to to the cartridge body 7264, and the clamps 7280 fired from the inner rows 7268c of the clamp cavities 7266 are superimposed at a third distance D3 in relation to the cartridge body 7264. The distances D1, D2 and D3 in Figure 147 are the distances between the support of the clamps 7280 and the adjacent portion of the 7262 platform surface.
[0461] [0461] To obtain the different overload distances D1, D2 and D3 in Figure 147, the stroke length of the 7270 actuators can be different. For example, the trigger member can be configured to lift the 7270 actuators that support the 7280 clamps in the outer rows 7268a in a first distance, to lift the 7070 actuators that support the 7280 clamps in the middle row 7268b in a second distance, and to take the 7270 actuators that support the 7280 clamps in the inner rows 7268c at a third distance. In certain cases, the geometry of the firing member can be selected to control the different stroke lengths of the 7270 actuators. In addition or alternatively, the geometry of the 7270 actuators, such as the height of the actuator, for example, can be selected to control the different overload distances. The different overload distances D1, D2 and D3 in Figure 147 can also be controlled by different heights of the stepped platform 7262.
[0462] [0462] As described in the present invention with respect to the end actuator 7000 (Figure 145), when the fabric gap is constant between the rows of clips, different depths of shell can be configured to accommodate variations in the overload distance, so that the clamps are formed with the same formed height. For example, again with reference to Figure 147, the span of TG fabric is constant between the first and second rows 6268a, 6268b of staple cavities 6266 and, in such cases, the different shell depths CD: and CD> are configured to accommodate variations in D: and D2 overload distances. In addition, as described with respect to the end actuator 7100 (Figure 146), when the gap of fabric varies between rows of clips, the gap of differential fabric can correspond to variations in the overload distance, so that the clamps are formed at the same formed height. For example, again with reference to Figure 147, does the step height of step 7267 correspond to the difference between the distances D and overload D3.
[0463] [0463] In several cases, the 7260 staple cartridge can also be compatible with an anvil that has a staggered tissue compression surface, such as the 7101 anvil (Figure 146). In such cases, the different overload distances D1, D2, and Da may correspond to different fabric spans between the stepped fabric compression surface 7107 of the anvil and the scaled platform 7262 of the staple cartridge. A 7300 end actuator that includes staple cartridge 7260 and anvil 7101 is shown in Figure 148. As further described in the present invention, end actuator 7300 is configured to form staples at a constant formed height along multiple rows.
[0464] [0464] Due to the two stepped surfaces 7107 and 7262 in Figure 148, end actuator 7300 defines a plurality of fabric spans between the anvil 7101 and the staple cartridge 7260. A first gap of TG fabric is defined between the first portion
[0465] [0465] As described in the present invention, a surgical tool set may include a drive shaft portion and a pivotable end actuator portion. For example, a pivot assembly can be positioned between the drive shaft portion and the end actuator portion, and the pivot assembly can enable the end actuator portion to pivot in a pivot joint with respect to to the portion of
[0466] [0466] An exemplary surgical tool set 8000 having a hinge joint 8200 is shown in Figures 149 to
[0467] [0467] The hinge drive system 8201 includes a hinge rod 8202 that includes a distal end 8204. The hinge drive system 8201 also includes a hinge link 8206 that comprises a proximal end 8208 coupled to the distal end 8204 of the stem hinge rod 8202. The hinge rod 8202 extends longitudinally through the drive shaft portion 8010. In at least one case, the hinge rod 8202 can be collinear with a central longitudinal axis L (Figures 150 to 152) the drive shaft portion 8010 that extends through the articulating geometric BB, although the articulating rod 8202 can be moved from the longitudinal geometric axis L in other modalities. The distal end 8204 of the articulation rod 8202 includes an extension 8205 that extends laterally in relation to the central longitudinal geometric axis L. For example, the extension 8205 extends in the direction opposite to the central longitudinal geometric axis L. As additionally described in the present invention, the lateral displacement of the extension 8205 in relation to the geometric axis L is configured to obtain the desired angular orientation of the articulation link 8206. The articulation rod 8202 is configured to move axially along the axis central longitudinal geometric L to affect the articulation movements of the 8100 end actuator. More specifically, the displacement of the articulation rod 8202 in the distal direction (DD) is configured to articulate the end actuator 8100 clockwise, and the offset the articulation rod 8202 in the proximal direction (PD) is configured to articulate the end actuator 8100 counterclockwise, for example.
[0468] [0468] The 8100 end actuator is articulated between a first fully articulated configuration and a second fully articulated configuration. The first fully articulated configuration can correspond to the total extension of the clockwise rotation, for example, and the second completely articulated configuration can correspond to the total extension of the counterclockwise rotation, for example. A non-articulated, or linear, configuration of the 8100 end actuator can be positioned between the first fully articulated configuration and the second fully articulated position. In several cases, the configuration does not articulate
[0469] [0469] Link link 8206 is a crosslink, which is similar in certain respects to crosslink 1237 (Figure 10), for example. Link 8206 is angularly oriented in relation to the central longitudinal geometry axis L. More specifically, link 8206 crosses the central longitudinal geometry axis L, so that the proximal end 8208 of link 8206 is positioned on a first side of the central longitudinal geometric axis L, and a distal end 8210 of the articulation link 8206 is positioned on a second side, opposite the side of the central longitudinal geometric axis L. In several cases, the angular orientation of the link 8206 can be configured to increase the mechanical advantage of the link drive system 8201. As the link 8202 moves axially in relation to the center, longitudinal geometric axis L, the link joint 8206 is also displaced in relation to the central longitudinal geometric axis L. For example, with reference to Figures 150 to 152, as the joint 8200 is moved a non-articulated configuration (Figure 150) for a first articulated configuration (Figure 151) and for a second articulated configuration (Figure 152), the articulation rod 8202 and the articulation link 8206 are displaced distally. Con-
[0470] [0470] In certain cases, the pivot drive system 8201 may not include the pivot link 8206. For example, the pivot rod 8202 can be pivotally coupled to the end actuator 8100. In certain cases, the The distal end of the articulation rod 8202 can define a contour and / or displacement, so that the distal end of the articulation rod 8202 is laterally displaced from the proximal end and / or from the central longitudinal geometric axis L.
[0471] [0471] Still referring to Figures 149 to 152, the distal end 8210 of the pivot link 8206 is pivotally coupled to the end actuator portion 8100 of the surgical tool set 8000 on a pivot joint 8211. For example , the distal end 8210 is coupled to a proximal portion, or extension, 8103 of the elongated channel of the end actuator or retainer portion 8102 on an AA pivot geometry axis (Figures 150 to 152) through the hinge joint 8211. Due to the pivot link orientation 8206, the pivot geometry axis AA is laterally offset from the central longitudinal geometry axis L and the geometric articulation axis BB. The distal end 8210 of the hinge link 8206 is coupled to the proximal extension 8103, so that the pivot geometry axis A-A extends through the proximal extension 8103.
[0472] [0472] According to the articulation rod 8202 and the articulation link 8206 are moved, for example pushed, in the distal direction (DD), the elongated channel 8102 is rotated clockwise on the pivot geometry axis A-A. In several cases, the 8100 end actuator may encounter resistance to their articulation and the articulation link 8206 may be subjected to a compression load as the 8201 articulation drive system seeks to overcome the resistance. In certain cases, when exposed to a load above a limit load, the pivot bar 8202 and / or the pivot link 8206 may be prone to bending, deformation, and / or kickback from the desired pivot position. In other words, the articulation link 8206 may be susceptible to lateral curvature under increased compressive loads. To counter or resist the curvature and / or disarticulation of the compressed articulation bar 8202 and / or the articulation link 8206 under high compressive loads, the articulation system 8201 may include a reinforcement or anti-return feature.
[0473] [0473] A reinforcement feature 8220 is shown in Figures 149 to 152. The reinforcement feature 8220 includes a clamp 8106 on end actuator 8100, which is operationally configured to engage a recess or notch 8226 on link 8206 in certain cases. The clamp 8106 is disengaged from the recess 8226 during most of the articulation movement (see Figures 149 to 151); however, in the fully articulated configuration of Figure 152, the clamp 8106 is received into the recess or pocket 8226, and portions of the clamp 8106 are in contiguous contact with the side walls of the recess 8226. The clamp 8106 comprises a projecting column from the proximal end of the elongated channel 8102 and the recess 8226 defines a pocket that is aligned with the clamp 8106, so that the clamp 8226 moves into the pocket when the end actuator 8100 is hinged in its fully articulated configuration ( Figure 152). In such cases, clamp 8106 provides a stopping surface that prevents the clockwise articulation of the 8100 end actuator in addition to the fully articulated configuration.
[0474] [0474] In addition, in the fully articulated configuration of Figure 152, the clamp 8106 is configured to exert a counter-bending and anti-return force on the articulation link 8206. More specifically, when a force is applied to the 8100 end actuator , as an externally applied force opposite the articulation movement of the articulation drive system 8201, further engagement between the recess 8226 and the clamp 8106 is configured to resist disarticulation and / or the curvature of the articulation link 8206. For example, the recess 8226 can apply a resistive anti-return force to the clamp 8016 in response to the application of a disarticulation force to the fully articulated end actuator 8100.
[0475] [0475] In several cases, the reinforcement feature 8220 may include at least a pair of flat opposite or "horizontal" surfaces to transfer forces between the clamp 8106 and the recess 8226. For example, the recess 8226 can define an internal surface that it has at least one horizontal or flat surface and the clamp 8106 can define an external surface that has at least one horizontal or flat surface. The flat surfaces can be complementary so that they are placed in contiguous contact when the 8100 end actuator is in the fully articulated configuration. For example, indentation 8226 can fit around portions of clamp 8106 like a wrench fits into the head of a screw. Contiguous flat surfaces are configured to provide force transfer surfaces for reinforcement feature 8220 and counterclocking of clamp 8106 within recess 8226. Clamp 8106 and recess 8226 have asymmetrical profiles. However, clamp 8106 and recess 8226 may have symmetrical outer profiles in other cases.
[0476] [0476] With reference mainly to Figure 152A, a detailed view of the 8220 reinforcement feature of Figure 152 is shown. The recess 8226 includes an inner surface 8228 which has a plurality of flat surfaces 8230a, 8230b, 8230c. In addition, clamp 8106 includes an outer surface 8108 that has a plurality of complementary flat surfaces 8110a, 8110b, 8210b. The flat surfaces 8230a, 8230b of the recess 8226 can be in contiguity with the corresponding flat surfaces 8210a, 8210b of the clamp 8226 to keep the clamp 8106 within the recess
[0477] [0477] In several cases, the articulation system 8201 may include a plurality of reinforcement features 8220. For example, the articulation system 8201 may include a recess similar to the recess 8226 towards the proximal end 8208 of the articulation link
[0478] [0478] Many of the surgical instrument systems described here are driven by an electric motor; however, the surgical instrument systems described here can be induced in any suitable way. In several examples, the surgical instrument systems described herein can be induced, for example, by a manually operated trigger. In certain cases, the engines described in this document may comprise a portion or portions of a robotically controlled system. In addition, any of the end actuators and / or tool sets shown in the present invention can be used with a robotic surgical instrument system. US patent application serial number 13 / 118,241, entitled SURGICAL STAPLING INSTRUMENTS WITH ROTATABLE STAPLE DEPLOYMENT ARRANGEMENTS, now patent US 9,072,535, for example, reveals several examples of a robotic surgical instrument system in more detail .
[0479] [0479] The surgical instrument systems described here have been described in connection with the implantation and deformation of the staples; however, the embodiments described in the present invention are not so limited. Several modalities are foreseen, which implant fasteners in addition to staples, such as claws or tacks, for example. In addition, several modalities are contemplated, which use any suitable means to seal the fabric. For example, an end actuator, according to various modalities, may comprise electrodes configured to heat and seal the tissue. Likewise, for example, an end actuator according to certain modalities, can apply vibrational energy to seal the tissue.
[0480] [0480] All of the descriptions of: - US patent No. 5,403,312, entitled "ELECTROSURGICAL HEMOSTATIC DEVICE", which was granted on April 4, 1995; - US patent No. 7,000,818, entitled "SURGICAL STA-
[0481] [0481] Although several devices have been described here in connection with certain modalities, modifications and variations of these modalities can be implemented. Specific resources, structures or characteristics can be combined in any appropriate way in one or more modalities. Therefore, the specific resources, structures or characteristics illustrated or described in connection with a modality can be combined, in whole or in part, with the resources, structures or characteristics of one or more other modalities, without limitation. In addition, where materials for certain components are described, other materials can be used. In addition, according to various modalities, a single component can be replaced by multiple components and multiple components can be replaced by a single component, to perform one or more specific functions. The description mentioned above and the following claims are intended to cover all such modifications and variations.
[0482] [0482] The devices described here can be designed to be discarded after a single use, or they can be designed to be used multiple times. In either case, however, a device can be reconditioned for reuse after at least one use. Reconditioning may include any combination of the steps including, but not limited to, disassembling the device followed by cleaning or replacing specific parts of the device and subsequent reassembly of the device. In particular, a reconditioning facility and / or surgical team can disassemble a device and, after cleaning and / or replacing particular parts of the device, the device can be reassembled for subsequent use. Those skilled in the art will understand that reconditioning a device can use a variety of techniques to disassemble, clean / replace and reassemble. The use of these techniques, as well as the resulting reconditioned device, are all within the scope of this application.
[0483] [0483] The devices described here can be processed before surgery. First, a new or used instrument can be obtained and, if necessary, cleaned. The instrument can then be sterilized. In a sterilization technique, the instrument is placed in a closed and sealed container, such as a plastic or TYVEK bag. The container and the instrument can then be placed in a radiation field that can penetrate the container, such as gamma radiation, X-rays and / or high-energy electrons. Radiation can kill bacteria on the instrument and the container. The sterile instrument can then be stored in a sterile container. The sealed container can keep the instrument sterile until it is opened in the medical facility. A device can also be sterilized using any other known technique, including, but not limited to, beta radiation, gamma radiation, ethylene oxide, plasma peroxide and / or water vapor.
[0484] [0484] Although this invention has been described as having exemplary designs, the present invention can be further modified within the spirit and scope of the description. It is intended, therefore, that this application covers any variations, uses or adaptations of the invention with the use of its general principles.
[0485] [0485] Any patent, publication or other description material, in whole or in part, that is said to be incorporated into the present invention as a reference, is incorporated into the present invention only to the extent that the embedded materials do not conflict with existing definitions, statements or other description material presented in this description. Accordingly, and to the extent necessary, the description as explicitly presented herein replaces any conflicting material incorporated by reference to the present invention.
Any material, or portion thereof, which is incorporated herein by reference, but which conflicts with the definitions, statements, or other description materials contained herein, will be incorporated here only to the extent that there is no conflict. between the incorporated material and the existing description material.

权利要求:
Claims (20)
[1]
1. Method for making a surgical stapling anvil, said method being characterized by the fact that it comprises the steps of: making a first anvil member and a second anvil member, and said first anvil member comprises : a fabric-facing surface comprising a plurality of staple-forming pockets defined therein; and a longitudinal cavity comprising anvil projections configured to be engaged by portions of the anvil cam of a firing member of a surgical stapling instrument; polishing said edges of said first anvil member; and welding said first anvil member and said second anvil member together.
[2]
2. Method according to claim 1, characterized by the fact that said manufacturing step comprises a metal injection molding process.
[3]
Method according to claim 1, characterized by the fact that said welding step comprises a laser welding process.
[4]
4. Method, according to claim 1, characterized by the fact that said manufacturing step comprises an electrochemical machining process.
[5]
5. Method, according to claim 1, characterized by the fact that the manufacturing step comprises: injection molding said first anvil member; and stamping said staple forming pockets on said fabric-facing surface.
[6]
6. Method, according to claim 5, characterized by the fact that said manufacturing step further comprises molding said second anvil member by metal injection.
[7]
7. Method, according to claim 1, characterized by the fact that each said projection comprises a first zone and a second zone, said first zone being configured to be placed in contact with said cam portions of the anvil of the said firing member, said second zone extending laterally in relation to said first zone, and said polishing step further comprising polishing said first zone and said second zone.
[8]
8. Method for making a surgical fixation anvil, said method being characterized by the fact that it comprises the steps of: manufacturing an anvil body portion and an anvil cover member, the said body portion the anvil comprises: a flat surface facing the fabric comprising a plurality of fastener-forming pockets defined therein; a longitudinal crack; and cam surfaces flanking said longitudinal slot and configured to be engaged by anvil cam portions of a firing member of a surgical fixation instrument; polishing said cam surfaces of said anvil body portion; and welding said anvil body portion and said anvil cover member together.
[9]
9. Method according to claim 8, characterized by the fact that said manufacturing step comprises a metal injection molding process.
[10]
10. Method according to claim 8, characterized in that said welding step comprises a laser welding process.
[11]
11. Method, according to claim 8, characterized by the fact that said manufacturing step comprises an electrochemical machining process.
[12]
12. Method according to claim 8, characterized by the fact that said manufacturing step comprises: molding said body portion of the beaker by metal injection; and stamping said fastener-forming pockets on said surface facing the fabric.
[13]
13. End actuator system for use with a surgical stapler, said end actuator being characterized by the fact that it comprises: an anvil that comprises a first stiffness; a cartridge channel configured to receive said clip cartridge thereon, said cartridge channel comprising a second stiffness; and structural means for balancing said second stiffness against said first stiffness.
[14]
14. End actuator system according to claim 13, characterized in that said first stiffness and said second stiffness comprise a ratio of between 1: 3 and 1: 1.
[15]
15. End actuator system, according to claim 13, characterized in that said means comprises removing material from said channel and adding material to said mustache.
[16]
16. End actuator system according to claim 13, characterized in that said channel comprises channel walls comprising: a proximal zone, said channel walls comprising a first width in said zone proximal; and a distal zone, said channel walls comprising a second width in said distal zone, said second width being greater than said first width, and said anvil comprising a configured proximal anvil portion to surround said channel walls in said proximal zone when the right end actuator system is in a completely secured configuration.
[17]
17. End actuator system, according to claim 16, characterized in that said anvil and said channel define a trapped diameter when said end actuator is in a stuck configuration, said portion being The proximal beaker comprises a volume of material configured to occupy an empty space defined as the space beyond said first width, but within said trapped diameter.
[18]
18. End actuator system according to claim 16, characterized in that said anvil proximal portion comprises projections and said walls in said proximal zone each comprise a projection, and said projections of said walls are configured to face said protrusions of said proximal anvil portion when said end actuator system is in said completely secured configuration.
[19]
19. End actuator system, according to claim 13, characterized by the fact that said channel comprises a proximal indented portion, said anvil comprising a proximal anvil portion configured to surround the indented portion proximal when said end actuator system is in a completely stuck configuration.
[20]
20. End actuator system according to claim 19, characterized in that it additionally comprises a trapped diameter, said proximal anvil portion comprising a volume of material configured to occupy a defined void space as the space defined by a cutout of said proximal cutout portion.

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JPS5033988U|1973-07-21|1975-04-11|

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JPS552966Y2|1974-02-08|1980-01-24|

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FR2446509B1|1977-04-29|1981-07-03|Garret Roger|

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JPS6060024B2|1977-10-19|1985-12-27|Hitachi Ltd|

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SE419421B|1979-03-16|1981-08-03|Ove Larson|RESIDENTIAL ARM IN SPECIAL ROBOT ARM|

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法律状态:
2021-11-03| B350| Update of information on the portal [chapter 15.35 patent gazette]|

优先权:

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申请号 | 申请日 | 专利标题

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US15/634,024|2017-06-27|

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US15/634,024|US11266405B2|2017-06-27|2017-06-27|Surgical anvil manufacturing methods|

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PCT/IB2018/054392|WO2019003030A1|2017-06-27|2018-06-14|Surgical anvil manufacturing methods|

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