surgical anvil provisions

专利摘要:
The present invention relates to a surgical stapling anvil comprising an anvil body that includes a tissue-facing surface, a plurality of staple forming pockets and a longitudinal slit. The longitudinal slot comprises a first portion configured to receive a cutting edge from a firing member therethrough and a second portion configured to receive an actuation portion of the anvil cam of the firing member therethrough. The anvil further comprises an anvil cap welded to the anvil body, where the anvil cap comprises a welded portion and an un-welded portion, where the non-welded portion comprises an un-welded width, and in which the un-welded width is less than or equal to about 105% of the width of the second portion.
公开号:BR112019027055A2
申请号:R112019027055-8
申请日:2018-06-14
公开日:2020-06-30
发明作者:Frederick E. Shelton Iv；Anil K. Nalagatla；Jerome R. Morgan；Gregory J. Bakos；Jason L. Harris
申请人:Ethicon Llc；
IPC主号:

专利说明:

[0001] [0001] The present invention relates to surgical instruments and, in various provisions, 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 handle set 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 handle set and the interchangeable surgical tool set 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 set of interchangeable surgical tools of Figure 4;
[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 firing 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 set of interchangeable surgical tools 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 a portion of the drive shaft of the interchangeable surgical tool set of Figure 4 with a staple cartridge surgical not worn properly seated within an elongated channel of the surgical end actuator;
[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 staple cartridge properly seated with an elongated actuator channel. surgical extremity pain;
[0022] [0022] Figure 19 is another top cross-sectional view of the surgical end actuator of Figure 15 with a cartridge of triggered surgical clips mounted on it, which illustrates the trigger 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 anvil 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 end actuator comprising the second anvil of Figure 34;
[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 modality in 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 trigger member according to at least one mode;
[0047] [0047] Figure 44 is a partial side elevation view of the trigger member of Figure 43;
[0048] [0048] Figure 45 is a partial frontal elevation view of the trigger member of Figure 43;
[0049] [0049] Figure 46 is a partial perspective view of a trigger member according to at least one mode;
[0050] [0050] Figure 47 is a partial side elevation view of the trigger member of Figure 46;
[0051] [0051] Figure 48 is a partial frontal elevation view of the trigger member of Figure 46;
[0052] [0052] Figure 49 is a partial perspective view of a trigger member according to at least one modality;
[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 trigger member according to at least one mode;
[0056] [0056] Figure 53 is a partial side elevation view of the trigger member of Figure 52;
[0057] [0057] Figure 54 is a partial frontal elevation view of the trigger member of Figure 52;
[0058] [0058] Figure 55 is a partial perspective view of a trigger member according to at least one modality;
[0059] [0059] Figure 56 is a partial side elevation view of the firing member of Figure 55;
[0060] [0060] Figure 57 is a partial front elevation view of the firing member of Figure 55;
[0061] [0061] Figure 58 is a partial perspective view of a trigger member according to at least one modality;
[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 trigger member according to at least one modality;
[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 trigger member, according to at least one modality;
[0068] [0068] Figure 65 is a partial side elevation view of the trigger 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 schematic view that represents the energy necessary to advance the firing members revealed here through staple firing courses;
[0072] [0072] Figure 69 is a detailed view of a lateral projection extending from the firing member of Figure 43 which schematically illustrates 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 extending from the firing member of Figure 58 which schematically illustrates 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 extending from the firing member of Figure 58 which schematically illustrates 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 comprising 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 stapling anvil comprising a first anvil member and a second anvil member, the first anvil member and the second anvil member being welded together;
[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 loading 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, the anvil members comprising interlocking features;
[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 together, the anvil members comprising interlocking features;
[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 firing 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 stapling system of Figure 104; and
[0111] [0111] Figure 108 is an anvil stress analysis of the stapling system of Figure 105.
[0112] [0112] 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
[0113] [0113] The applicant for this application holds the following US patent applications, which were filed on the same date as this application and which are each incorporated herein by reference in their respective totalities: - US Patent Application no. series, entitled SURGICAL ANVIL MANUFACTURING METHODS; power of attorney document END8165USNP / 170079M; - US Patent Application serial number, entitled SURGICAL ANVIL ARRANGEMENTS; power of attorney document END8168USNP / 170080; - US Patent Application serial number, entitled SURGICAL ANVIL ARRANGEMENTS; power of attorney document END8164USNP / 170082; - US Patent Application serial number, entitled STAPLE FORMING POCKET ARRANGEMENTS; power of attorney document END8169USNP / 170083; - US Patent Application serial number, entitled STAPLE FORMING POCKET ARRANGEMENTS; power of attorney document END8167USNP / 170085;
[0114] [0114] 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 serial number 15 / 386,185, entitled
[0115] [0115] 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 STAMPED STAPLES;
[0116] [0116] 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: - Patent Application for Industrial Design US Serial No. 29 / 569,218, entitled SURGICAL FASTENER; - US Industrial Design Patent Application Serial No. 29 / 569,227, entitled SURGICAL FASTENER; - US Industrial Design Patent Application Serial No. 29 / 569,259, entitled "'SURGICAL FASTENER CARTRIDGE"; and - US Industrial Design Patent Application Serial No. 29 / 569,264, entitled "'SURGICAL FASTENER CARTRIDGE".
[0117] [0117] 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 No. 15 / 089,321, entitled
[0118] [0118] The applicant for this application also holds the US patent applications identified below, which were filed on December 31, 2015, which are each incorporated by reference in their respective totalities: - Application for US Patent Serial No. 14 / 984,488, entitled "MECHANISMS FOR COMPENSATING FOR BATTERY PACK FAILURE IN POWERED SURGICAL INSTRUMENTS"; - US Patent Application Serial No. 14 / 984,525, entitled
[0119] [0119] The applicant for this application also holds the US patent applications identified below, which were filed on February 9, 2016, and are each incorporated herein by reference in their respective totalities: - US Patent Application No. serial 15 / 019.220, entitled "SURGICAL INSTRUMENT WITH ARTICULATING AND AXIALLY TRANSLATABLE END EFFECTOR"; - US Patent Application Serial No. 15 / 019,228, entitled "SURGICAL INSTRUMENTS WITH MULTIPLE LINK ARTICULATION
[0120] [0120] 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 no. 15 / 043,254, entitled MECHANISMS FOR COMPENSATING FOR DRIVETRAIN FAILURE IN POWERED SURGICAL INSTRUMENTS;
[0121] [0121] 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: - US Patent Application Serial No. 14 / 742,925, entitled SURGICAL END EFFECTORS WITH POSITIVE JAW OPENING ARRANGEMENTS, now US Patent Application Publication No. 2016/0367256; - US Patent Application Serial No. 14 / 742,941, entitled
[0122] [0122] The applicant for this application holds the following patent applications that were filed on March 6, 2015 and which are each incorporated by reference in their respective totalities: - US Patent Application Serial No. 14 /640,746, entitled "POWERED SURGICAL STAPLER", now US Patent Application Publication No. 2016/0256184; - US Patent Application Serial No. 14 / 640,795, entitled MULTIPLE LEVEL THRESHOLDS TO MODIFY OPERATION OF PO- WERED SURGICAL INSTRUMENTS, now US Patent Application Publication 2016/02561185; - US Patent Application Serial No. 14 / 640,832, entitled ADAPTIVE TISSUE COMPRESSION TECHNIQUES TO ADJUST CLO- SURE RATES FOR MULTIPLE TISSUE TYPES, now US Patent Application Publication 2016/0256154; - US Patent Application No. 14 / 640,935, entitled OVERLAID MULTI SENSOR RADIO FREQUENCY (RF) ELECTRODE SYSTEM TO MEASURE TISSUE COMPRESSION, now US Patent Application Publication No. 2016/0256071; - US Patent Application Serial No. 14 / 640,831, entitled MONITORING SPEED CONTROL AND PRECISION INCREMENTING
[0123] [0123] The applicant for this application holds the following patent applications that were filed on February 27, 2015 and which are each incorporated herein by reference in their respective totalities: - US Patent Application No. series 14 / 633,576, entitled
[0124] [0124] The applicant for this application holds the following patent applications that were filed on December 18, 2014 and which are each incorporated by reference in their respective totalities: - US Patent Application No. series 14 / 574.478, entitled SURGICAL INSTRUMENT SYSTEMS COMPRISING AN ARTICULA-
[0125] [0125] 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:
[0126] [0126] 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 No. serial 13 / 803.097, entitled "ARTICULATABLE SURGICAL INSTRUMENT COMPRISING A FLERING DRIVE", now US Patent Application Publication No. 2014/0263542; - US Patent Application Serial No. 13 / 803,193, entitled CONTROL ARRANGEMENTS FOR A DRIVE MEMBER OF A SURGI-CAL INSTRUMENT, now US Patent No. 9,332,987; - US Patent Application Serial No. 13 / 803,053, entitled "INTERCHANGEABLE SHAFT ASSEMBLIES FOR USE WITH A SURGICAL INSTRUMENT", now, US Patent Application Publication No. 2014/0263564; - US Patent Application Serial No. 13 / 803,086, entitled "ARTICULATABLE SURGICAL INSTRUMENT COMPRISING AN AR-TICULATION LOCK", now US Patent Application Publication No. 2014/0263541; - US Patent Application Serial No. 13 / 803,210, entitled "SENSOR ARRANGEMENTS FOR ABSOLUTE POSITIONING SYS- TEM FOR SURGICAL INSTRUMENTS", now US Patent Application Publication No. 2014/0263538; - US Patent Application Serial No. 13 / 803,148, entitled "MULTI-FUNCTION MOTOR FOR A SURGICAL INSTRUMENT", now US Patent Application Publication No. 2014/0263554; - US patent application 13 / 803,066, entitled DRIVE TRAIN CONTROL ARRANGEMENTS FOR MODULAR SURGICAL INSTRUMENTS, now US Patent No. 9,629,623;
[0127] [0127] 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 No. 14 / 200,111, entitled MOTOR-DRIVEN SURGICAL CUTTING INSTRUMENT, now US Patent No. 9,629,629.
[0128] [0128] The applicant for this application also holds the following patent applications that were filed on March 26, 2014 and which are each incorporated by reference in their respective totalities: - US Patent Application No. series 14 / 226,106, entitled "POWER MANAGEMENT CONTROL SYSTEMS FOR SURGICAL INSUMENTS", now US Patent Application Publication No. 2015/0272582; - US Patent Application Serial No. 14 / 226,099, entitled "STERILIZATION VERIFICATION CIRCUIT", now US Patent Application Publication 2015/0272581; - US Patent Application Serial No. 14 / 226,094, entitled "VERIFICATION OF NUMBER OF BATTERY EXCHANGES / PROCE- DURE COUNT", now US Patent Application Publication No. 2015/0272580;
[0129] [0129] The applicant for this application also holds the following patent applications that were filed on September 5, 2014 and which are each incorporated 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 No. 14 / 479,119, entitled "ADJUNCT WITH INTEGRATED SENSORS TO QUANTIFY TISSUE COMPRESSION", now, US Patent Application Publication No. 2016/0066914; - US Patent Application Serial No. 14 / 478,908, entitled "MONITORING DEVICE DEGRADATION BASED ON COMPONENT EVALUATION", now, US Patent Application Publication No. 2016/0066910; - US Patent Application Serial No. 14 / 478,895, entitled "MULTIPLE SENSORS WITH ONE SENSOR AFFECTING A SECOND SENSOR'S OUTPUT OR INTERPRETATION", now, Publication of
[0130] [0130] 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. series 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 No. 14 / 248,581, entitled
[0131] [0131] 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: - US Provisional 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";
[0132] [0132] Numerous specific details are presented to provide a complete understanding of the structure, function, manufacture 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 disclosed in the present invention can be representative and illustrative. Variations and changes can be made to this, without departing from the scope of the claims.
[0133] [0133] The terms "understands" (and any form of understand, such as "understands" and "that understands"), "has" (and any form of has, such as "has" and "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 device that "comprises", "has", "includes" or "contains" one or more resources has those one or more resources, but is not limited to possess only those one or more resources.
[0134] [0134] 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 doctor, and the term "distal" refers to the portion located opposite the doctor. It will also be understood that, for the sake of convenience and clarity, spatial terms such as "vertical", "horizontal", "up" and "down" can be used in the present invention with respect to the drawings. However, surgical instruments can be used in many orientations and positions, and these terms are not intended to be limiting and / or absolute.
[0135] [0135] Several exemplary devices and methods are provided for performing laparoscopic and minimally invasive surgical procedures. However, the reader will readily understand that the various methods and devices disclosed in the present invention can be used in numerous 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 disclosed here can be inserted into a body in any way, such as through a natural orifice, through an incision or perforation formed in fabric, 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 shaft long drive of a surgical instrument can be advanced.
[0136] [0136] 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 jaw comprises a staple cartridge. The staple cartridge is insertable into, and removable from, the first gripper; however, other modalities are provided for in which a staple cartridge is not removable, or at least promptly replaceable, from the first gripper. The second claw comprises an anvil configured to deform the staples ejected from the staple cartridge. The second claw is pivoting in relation to the first claw around a geometric axis of the cover; however, other modalities are foreseen in which the first claw is pivoting in relation to the second claw. The surgical stapling system additionally comprises an articulation joint configured to allow the end actuator to be rotated or articulated in relation to the drive shaft. The end actuator is rotatable about a geometric pivot axis that extends through the pivot joint. Other modalities are foreseen that do not include an articulation joint.
[0137] [0137] 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 a first side of the fabric to be stapled and the anvil is positioned on a second side of the fabric. The anvil is moved towards the staple cartridge to compress and hold 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 slot.
[0138] [0138] 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 triggered position, to eject the clamps from the clamp cavities. The actuators are retained in the cartridge body by a retainer that extends around the bottom of the cartridge body and includes resilient members configured to secure the cartridge body and retain the retainer in the cartridge body. The actuators are mobile between their non-triggered positions and their positions triggered by a slider. The slide is movable between a proximal position adjacent to the proximal end and a distal position adjacent to the distal end. The slide comprises a plurality of inclined surfaces configured to slide under the actuators and lift the actuators, and the staples supported on it, towards the anvil.
[0139] [0139] 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 span, 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 that the knife is positioned at least partially proximal to the inclined surfaces, so that the staples are ejected in front of the knife.
[0140] [0140] 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 500 handle set. 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 robotic or automated controlled surgical system. For example, the surgical instrument sets disclosed here can be used with various robotic systems, instruments, components and methods such as those disclosed in US patent no.
[0141] [0141] Figure 2 illustrates a shape of an interchangeable surgical tool set 100 that is operationally coupled to the handle set 500. Figure 3 illustrates the attachment of the interchangeable surgical tool set 100 to the handle set.
[0142] [0142] Now with reference to Figure 3, the handle assembly 500 may also include a frame 506 that operationally supports a plurality of drive systems. For example, the 506 structure can operationally support a "first" drive system or closing drive system, generally referred to as 510, which can be used to apply closing movements and opening to the interchangeable surgical tool set 100, 200, 300 and 1000 that is fixed or operationally coupled to the handle set 500. In at least one shape, the closing drive system 510 can include an actuator under the shape of a closing trigger 512, hingedly supported by frame 506. This arrangement allows the closing trigger 512 to be handled by a doctor, so that when the doctor holds the pistol grip portion 504 of the handle assembly 500, the closing trigger 512 can be easily rotated from an initial or "not actuated" position to an "acted" position and, more particularly, to a fully compressed or completely position acted upon. 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 interfaces with it. As will be discussed in more detail below, the closing link assembly 514 includes a transverse fixing pin 516 that facilitates attachment to a corresponding drive system in the surgical tool set. To trigger the closing trigger system, the doctor presses the closing trigger 512 towards the pistol grip handle 504. As described in more detail in US Patent Application Serial No. 14 / 226.142, entitled SURGICAL INSTRUMENT COMPRISING SENSOR SYS-TEM, now US Patent Application Publication No. 2015/0272575 which is hereby incorporated by reference in its entirety, the closing drive system is configured to lock the closing trigger 512 in the fully position pressed or fully actuated when the doctor fully presses the 512 closing trigger to obtain the full closing stroke. When the clinician wishes to unlock the closing trigger 512 to allow the closing trigger 512 to be propelled to the unacted position, the physician simply activates a set of closing release button 518 that allows the closing trigger to return to the unacted position. The lock release button 518 can also be configured to interact with various sensors that communicate with a microcontroller 520 in the handle set 500 to track the position of the lock trigger 512. Further discussion regarding configuration and operation of the 518 lock release button set can be found in US Patent Application Publication No. 2015/0272575.
[0143] [0143] In at least one form, the handle assembly 500 and the frame 506 can operationally support another drive system called in the present invention a trigger drive system 530, which is configured to apply trigger movements to the portions corresponding to the interchangeable surgical tool set that is attached to it. As described in details 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 set portion pistol grip 504 of handle assembly 500. In various forms, the motor can be a brush-driven direct current (DC) motor with a maximum speed of approximately 25,000 RPM, for example. In other arrangements, the motor may include a brushless motor, a wireless motor, a synchronous motor, a stepper motor or any other suitable electric motor. The motor can be powered by a power source 522 which, in one form, can comprise a removable power unit. The power source can support a plurality of lithium ion batteries ("Li ions") or other suitable ones therein. Several batteries, which can be connected in series, can be used as the power source 522 for the surgical system 10. In addition, the power source 522 can be replaceable and / or rechargeable.
[0144] [0144] The electric motor is configured to axially drive a longitudinally movable drive 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 "DD" direction. When the electric motor is driven in the opposite direction of rotation, the longitudinally movable drive member 540 will be driven axially in the proximal direction "PD". The handle assembly 500 may include a key 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 handle assembly 500 can also include a sensor or sensors that are configured to detect the position of the driving member 540 and / or the direction in which the driving member 540 is being moved. The motor drive can be controlled by a trigger trigger 532 (Figure 1) pivotally held in the handle 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 doctor releases the trigger trigger 532, the trigger trigger 532 can be turned or otherwise, returned to the unactivated position by means of the spring or the bias arrangement. In at least one way, trigger trigger 532 can be positioned "far" from closing trigger 512, as discussed above. As discussed in US Patent Application Publication 2015/0272575, the handle assembly 500 can be equipped with a trigger trigger safety button to prevent inadvertent triggering of the trigger trigger 532. When the trigger trigger lock 512 is in the unacted position, the safety button is contained in the handle set 500, where the doctor cannot readily access the safety button and move it between a safety position, which prevents the trigger from operating trigger 532, and a trigger position in which the trigger trigger 532 can be fired. When the physician presses the closing trigger 512, the safety button and the trigger trigger 532 pivot down, where they can then be manipulated by the physician.
[0145] [0145] In at least one form, the longitudinally movable drive member 540 may have a toothed rack formed in it for engagement with a corresponding drive gear arrangement that interfaces with the motor. Additional details regarding those resources can be found in the
[0146] [0146] 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 which 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 the actuator releasably. end 110 in a desired position relative 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 No. 13 / 803.086, entitled "ARTICULATABLE SURGICAL INSTRUMENT COMPRISING À FIRING DRIVE ", currently US Patent Application Publication No. 2014/0263541, which is hereby incorporated by 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 closing tube assembly 140 that can be used to close and / or open the anvil 114 of the end actuator 110. As discussed in US Patent Application Publication 2015/0272575, the closing tube assembly 140 is movably supported on a central column 145 that supports the articulation actuator arrangement 147 configured to apply articulation movements to the surgical end actuator 110. The central column 145 is configured to, firstly, slide a trigger bar 170 in its interior and, secondly, to slide the tube assembly closure 140 that extends around central column 145. In various circumstances, central column 145 includes a proximal end that is swiveled on a chas si 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 fixation of the central column 145 to the chassis 150, so that the central column 145 can be selectively rotated around a geometric axis of the drive axis SA in relation to the chassis 150.
[0147] [0147] Referring also to Figure 3, the interchangeable surgical tool set 100 includes a movable closing member
[0148] [0148] As indicated above, the interchangeable surgical tool set 100 additionally includes a firing bar 170 which is supported to carry out an axial displacement within the central column of the drive shaft 145. Firing bar 170 includes a - Intermediation of the trigger 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 pivot drive to the firing bar 170. Further details regarding the characteristics and operation of the coupling assembly can be found in the Order Publication US Patent No. 2014/0263541. As discussed in US Patent Application Publication 2014/0263541, the distal movement of the firing bar 170 can move the arrangement of the hinge actuator 147 distally and, correspondingly, the proximal movement of the firing bar 170 can move the arrangement of the articulation actuator 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 hinge actuator 147 and, as a result, the firing bar 170 can move independently of the disposition of the actuator. hinge 147. Interchangeable surgical tool set 100 may also include a slip ring assembly that can be configured to conduct electrical energy to and / or from end actuator 110 and / or transmit signals to and / or from of end actuator 110. Additional details regarding the slip ring assembly can be found in US Patent Application Publication No. 2014/0263541. US Patent Application Serial No. 13 / 800,067, entitled STAPLE CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM, currently US Patent Application Publication No. 2014/0263552, is hereby incorporated by reference in its entirety. US patent No. 9,345,481, entitled STAPLE CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM, is also incorporated in its entirety into the present invention by reference.
[0149] [0149] 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 corresponding dovetail cracks 507 formed inside a distal end of the structure 506. Each dovetail slit 507 can be tapered or, in other words, can have an approximate V shape to seat the fixing 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 handle set 500, the drive shaft fixing 172 is received in a firing drive shaft fixing cradle 542 formed at the distal end of the longitudinally movable driving member 540. The interchangeable surgical tool set 100 also employs a 180 clip system for releasably securing the drive shaft assembly 100 to the frame 506 of the handle assembly 500. In at least one shape, the clamp system 180 includes a locking member or a locking fork 182 that is movably coupled to the chassis 150. The locking fork 182 includes two locking pins that project proximally 184 which are configured to engage releasably to dete corresponding locking grooves or grooves 509 on the distal fixing flange of frame 506. In various forms, locking fork 182 is proximally propelled by the spring or bias member. The actuation of the locking fork 182 can be done by a locking button 186 which is slidably mounted on a locking actuator assembly that is mounted on the chassis 150. The locking button 186 can be forced on a proximal direction in relation to the locking fork
[0150] [0150] To fix the interchangeable surgical tool set 100 to the handle set 500, a physician can position the chassis 150 of the interchangeable surgical tool set 100 above or adjacent to the distal end of the frame 506, so that the tapered fixation portions 152 formed in the chassis 150 are aligned with the dovetail slots 507 in the frame 506. The doctor can then move the interchangeable surgical tool set 100 along a geometric axis of installation IA which is perpendicular to the SA drive shaft to seat the tapered clamping portions 152 in operational engagement with the corresponding dovetail receiver slots 507 at the distal end of the frame 506. When doing this, the clamping pin of the shaft drive 172 on the intermediate firing drive shaft 170 will also be seated in cradle 542 on the longitudinally movable drive member 540 and the pin portions 516 on the closing link 514, the corresponding hooks 162 on the movable closing element 160 will be seated. As used in the present invention, the term "operational coupling" in reference to two components means that the two components are engaged with each other so that, by applying - cation of a movement of action to them, the components perform their intended action, function and / or procedure.
[0151] [0151] Again with reference to Figure 1, surgical system 10 includes four interchangeable surgical tool sets 100, 200, 300 and 1000 that can each be effectively employed with the same handle set 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. Various 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.
[0152] [0152] 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. The movable gripper is moved between the open and closed positions by applying opening and closing movements applied to it by the handle set or by the robotic or automated surgical system to which the surgical tool set is operationally coupled. In addition, each of the interchangeable surgical tool sets illustrated includes a firing member that is configured to cut tissue and trigger clamps from a staple cartridge that is held in one of the jaws in response to applied firing movements at the same time by the handle set or by the robotic system. Each surgical tool set can be designed exclusively to perform a specific procedure, for example, to cut and fasten a specific type of tissue and a specific thickness of tissues within a given area on the body. The closing, firing and articulation control systems in the handle set 500 or in the robotic system can be configured to generate axial control movements and / or rotary control movements depending on the type of settings of the closing systems, firing and articulation that are used in the surgical tool set. In one arrangement, one of the control components of the locking system moves axially from an unactivated position to its fully actuated position when a closing control system in the handle assembly or robotic system is fully activated. The axial distance at which the closing tube assembly moves from its unacted position to its fully acted position can be referred to here as its "closing stroke length". Similarly, one of the control components of the firing system moves axially from its unactivated position to its fully engaged or disengaged position when a firing system in the handle assembly or robotic system is fully engaged . The axial distance that the longitudinally movable drive member moves between its unacted position and its fully fired position can be called the "stroke length". For surgical tool sets that employ articulating end actuator arrangements, the handle set or robotic system can employ components of the joint control that move axially through a "joint drive stroke length". In many circumstances, the length of the closing stroke, the length of the firing stroke and the length of the articulation drive stroke are fixed for a given handle set or robotic system. Thus, each of the surgical tool sets must be able to accommodate the control movements of the closing, firing and / or articulation components through each of their entire stroke lengths without placing undue stress on the components of the cyclic tool. that could lead to damage to the surgical tool set.
[0153] [0153] 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 which is configured to operationally support a staple cartridge 1110 The end actuator 1100 can additionally include an anvil 1130 which is pivotally supported in relation to the elongated channel 1102. The exchangeable surgical tool set 1000 can also include a hinge joint 1200 and a locking pin. pivot 1210 (Figures 5 and 8 to 10), which can be configured to release the end actuator 1100 in a desired pivot position relative to a geometric axis of the drive axis.
[0154] [0154] 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 assembly set 1230. The end actuator assembly 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.
[0155] [0155] Still with reference to Figure 10, the articulation actuator
[0156] [0156] Referring primarily 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 closing movable member 1420 can be moved axially with respect to 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 the 500 handle set, as discussed above. A proximal end 1412 of a proximal closing tube segment 1410 is pivotally coupled to the closing member 1420. For example, a U-shaped connector 1424 is inserted into an annular slot 1414 at the proximal end 1412 of the proximal closing tube segment 1410 and is retained within the vertical gaps 1422 in the mobile closing element 1420. See Figure 7. This arrangement serves to secure the proximal closing tube segment 1410 to the closing movable member 1420 for axial displacement with the same, while allowing the closing tube assembly 1400 to rotate in relation to the closing movable member 1420 around the geometric axis of the drive shaft SA. A closing spring is seated on the proximal end 1412 of the proximal closing tube segment 1410 and serves to propel the closing tube assembly 1400 in the proximal direction PD, which can serve to rotate the closing trigger 512 on the assembly handle 500 (Figure 3) to the unacted position when the interchangeable surgical tool set 1000 is operationally coupled to the handle set 500.
[0157] [0157] 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 closing actuator sleeve. end or segment of distal closure tube 1430 of closure tube assembly 1400. As can be seen in Figure 10, the segment of distal closure tube 1430 includes the upper and lower protrusions 1434, 1436 that project proximally from a proximal end of it. An upper double pivot link 1220 includes proximal and distal pins that engage the corresponding holes in the upper protrusions 1415, 1434 of the proximal closing tube segment 1410 and the distal closing tube segment 1430, respectively. Similarly, an upper double pivot link 1222 includes proximal and distal pins that engage the corresponding holes in the upper protrusions 1416 and 1436 of the proximal closing tube segment 1410 and the distal closing tube segment 1430, respectively. As will be discussed in more detail below, the distal and proximal axial translation of the closing tube assembly 1400 will result in the opening and closing of the anvil 1130 in relation to the elongated channel 1102.
[0158] [0158] 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 back assembly 1500. Firing member set 1600 includes a intermediate firing drive shaft portion 1602, which is configured to be connected to a distal cutting portion or cutting bar 1610. The firing member assembly 1600 can also be referred to in the present invention as a "second driving shaft" 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 dimensioned and configured to allow relative movement between them and can comprise a sliding joint
[0159] [0159] In addition to the above, the interchangeable tool set 1000 may include a coupling set 1620 that can be configured to selectively and releasably couple the hinge actuator 1700 to the set of the firing member 1600. In one form , the coupling assembly 1620 comprises a locking ring or sleeve 1622 positioned around the firing member assembly 1600, the locking sleeve 1622 being rotatable between an engaged position, where the locking sleeve 1622 engages the actuator hinge 1700 to the firing member 1600, and a disengaged position, where the hinge actuator 1700 is not operably coupled to the firing member 1600. When the locking sleeve 1622 is in its engaged position , the distal movement of the firing member assembly 1600 can move the hinge actuator 1700 distally and, correspondingly, the proximal movement of the firing member assembly 1600 can proximally move hinge driver 1700. When lock sleeve 1622 is disengaged, movement of trigger member assembly 1600 is not transmitted to hinge driver 1700 and, as a result, hinge firing member 1600 can move independently of the hinge trigger 1700. In many circumstances, the proximal hinge trigger 1700 can be held in position by hinge lock 1210 when hinge trigger 1700 is not being moved in directions proximal or distal by the trigger member assembly
[0160] [0160] With reference mainly to Figure 7, the locking sleeve 1622 may comprise a cylindrical body, or at least substantially cylindrical, including a longitudinal opening 1624 defined therein, configured to receive the firing member assembly.
[0161] [0161] In the illustrated arrangement, the switching barrel 1630 includes an L-shaped slot 1636 that extends into a distal opening 1637 in the switching barrel 1630. The distal opening 1637 receives a cross pin 1639 from a shifting plate
[0162] [0162] 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 end actuator 1100 and / or from it back to a microprocessor in the handle 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 No. 2014/0263541 and Paid Application. try US Serial No. 15 / 019,196, each of which has been incorporated by reference in its respective entirety as well as in US Patent Application Serial No. 13 / 800,067 entitled STAPLE CARTRIDGE TISSUE THICKNESS SENSOR SYSTEM, currently US Patent Application Publication Serial No. 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 by reference, the interchangeable surgical tool set 1000 can also comprise at least one sensor that is configured to detect the position of the 1630 switching.
[0163] [0163] 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 dovetail slits 507 formed inside the portion of distal end of the frame 506 of the handle assembly 500, as discussed above. As can also be seen in Figure 7, a drive shaft fixation pin 1605 is formed at the proximal end of the intermediate firing drive shaft 1602. As will be discussed in more detail below, the shaft fixation pin drive shaft 1605 is received in a trigger drive shaft fixing substructure 542 that is formed at the distal end of the longitudinal drive member 540 when the interchangeable surgical tool set 1000 is coupled to the handle set 500. See Figure 3.
[0164] [0164] Several interchangeable surgical tool sets employ an 1810 locking system to removably attach the interchangeable surgical tool set 1000 to the frame 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 to outside 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 frame. This arrangement facilitates the pivoting fixation of the 1812 locking fork. to the 1800 chassis. The locking fork 1812 can include two locking pins projecting proximally 1818 that are configured to engage releasably with the corresponding holders or locking grooves 509 in the ex distal tremor of frame 506 of handle set 500. See Figure 3. In many ways, the 1812 locking fork is forced in the proximal direction by a spring or bias member 1819. The actuation of the locking 1812 can be done by a locking button 1820 which is slidably mounted on a set of locking actuator 1822 which is mounted on the 1800 chassis. Locking button 1820 can be forced in a proximal direction relative to the locking fork 1812. The 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 of the frame 506. When the locking fork 1812 is in a retaining slot with the distal end of the frame 506, the locking pins 1818 are seated securely within the retainers or locking grooves then corresponding 509 at the distal end of frame 506.
[0165] [0165] In the illustrated arrangement, the locking fork 1812 includes at least one and, preferably, two locking hooks 1824 which are adapted to contact 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 handle 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
[0166] [0166] Still referring to Figure 10, the cutter 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 pivoted. Such an arrangement allows the cutter bar 1610 to be flexible enough to accommodate the articulation of the end actuator. Various laminated knife bar arrangements are disclosed in US Patent Application Serial No. 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 it flexes to accommodate the surgical end actuator joint.
[0167] [0167] Figure 11 illustrates a shape of a firing member
[0168] [0168] 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 surgical 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 1111 cartridge body operationally supports within it a plurality of clip actuators (not shown in Figure 10) that are aligned in rows on each side of a centrally arranged slot 1114. The centrally arranged slot 1114 allows the firing member 1660 to pass through the cut the fabric that is stuck between the anvil 1130 and the staple cartridge 1110. The actuators are associated with corresponding pockets 1115 that open through the upper platform surface of the cartridge body. Each of the clamp actuators supports one or more clamps or surgical fasteners in it. Slider 1120 includes a plurality of inclined or wedge-shaped cams 1122 with each cam 1122 corresponding to a particular line of fasteners or drivers located on one side of slot 1114. In the illustrated example, a cam 1122 is aligned with a line of "double" actuators that each hold two clamps or fasteners in it and another cam 1122 is aligned with another line of "single" actuators on the same side of slot 1114 that each support a single surgical clamp or holder in it. Thus, in the example shown, when the 1110 surgical staple cartridge is "fired", there will be three staple lines on each side of the tissue cut line. However, other cartridge and driver configurations could also be employed to trigger other clip / fastener arrangements. The slider 1120 has a central body portion 1124 that is configured to be engaged by the shoulder 1665 of the firing member 1660. When firing member 1660 is fired or driven distally, firing member 1660 also drives the slider 1120 distally. As the firing member 1660 moves distally through the cartridge 1110, the fabric cutting feature 1666 cuts the fabric that is stuck between the anvil assembly 1130 and the cartridge 1110, and also the slide 1120 drives the triggers upward in the cartridge that activate the corresponding clamps or fasteners in formation contact with the 1130 anvil assembly.
[0169] [0169] 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 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 tissue would be cored but not tapped. Similarly, if a staple cartridge used (that is, a staple cartridge in which at least some staples have already been triggered) is present in the end actuator and the trigger 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
[0170] [0170] A fastener cartridge "not fired", "not worn", "fresh" or "new" 1110 means that the fastener cartridge 1110 has all its latches in their "positions ready to be released together". The new cartridge 1110 is seated within the elongated channel 1102 and can be retained there by snap-fit features on the cartridge body, which are configured to engage corresponding portions of the elongated channel 1102 by retention. Figures and 18 illustrate a portion of the 1100 surgical end actuator with a new or unloaded surgical staple cartridge 1110 seated there. As can be seen in Figures 15 and 18, slide 1120 is in its initial position. To prevent the triggering system from being activated and, more precisely, to prevent the triggering member 1660 from being driven distally through the end actuator 1110 unless an un-fired or new surgical staple cartridge has been properly seated inside the elongated channel 1102, the interchangeable surgical tool set 1000 employs a trigger member locking system generically designated as 1650.
[0171] [0171] 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 one laterally moving locking portion 1654, which is configured to engage by locking a corresponding portion of the firing 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 extending laterally from firing member 1660. Other locking arrangements can be used.
[0172] [0172] 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 lateral 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 center spring portion 1653 is seated inside 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 laterally movable locking portions 1654 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 locking portions 1654 to retain the firing member retentively from being distally, or axially, advanced.
[0173] [0173] The operation of the firing limb 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 on or extends proximally to from each of the central wedge-shaped cams 1122. In alternative arrangements, the unlocking feature 1126 may comprise a portion projecting proximally to the corresponding wedge-shaped cam 1122. As can be seen in Figure 18, the unlocking features 1124 engage and tilt the corresponding locking portions 1654 laterally in a direction that is transverse to the geometric axis of the drive shaft SA (Figure 2) when the slide 1120 is in its starting position. When the locking portions 1654 are in these unlocked orientations, the central features of the retainer 1680 are not in locking engagement with Its locking windows 1658. In such cases, the firing member 1660 can be moved (fired) distally or axially. However, when a cartridge is not present in the elongated channel 1102 or the slide 1120 has been moved out of its initial position (meaning that the cartridge is partially or completely fired), the locking portions 1654 stretch laterally to retaining engagement with firing member 1660. In such cases, with reference to Figure 19, firing member 1660 cannot be moved distally.
[0174] [0174] Figures 16 and 17 illustrate the retraction of the firing member 1660 back to its initial position, or not firing, after performing a clamp firing course as discussed above. THE
[0175] [0175] Again with reference to Figures 13 and 14, the anvil
[0176] [0176] Returning to Figures 12 and 13, the anvil slot 1138, as well as the proximal ramp portion 1148, extend into the anvil mounting portion 1150. In other words, the anvil slot 1138 forks or divides the anvil mounting portion 1150 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.
[0177] [0177] 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 and 20) through it . The anvil mounting portion 1150 is pivotally secured to the proximal end 1103 of the elongated channel 1102 by a pivot pin 1158 which 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
[0178] [0178] In addition to the aforementioned, the anvil 1130 is moved between an open position and closed positions by means of the axial advance and retraction of 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 segment of distal closing tube 1430. Figure
[0179] [0179] 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 geometric axis AA (Figure 5) of the anvil, resulting in movement pivoting from 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 channel 1102. When the body portion of the anvil 1132 begins to rotate, it enters 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 1132 is compressed on the fabric, the 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 its distal advance. However, depending on their magnitudes and points of application to the body portion of the anvil 1132, these resistive forces could tend to cause the portions of the anvil 1130 to flex in the opposite direction to the staple cartridge 1110, which can generally be undesirable. For example, such flexion can cause misalignment between firing member 1660 and passages 1148, 1146 within anvil 1130. In cases where flexion is excessive, such flexion could significantly increase the amount of firing force needed to fire the instrument (ie, trigger the firing member 1660 through the fabric from its initial to final position). Such excessive triggering force can result in damage to the end actuator, the trigger member, the cutter bar and / or the components of the trigger drive system, for example. Thus, it may be advantageous for the anvil to be constructed in such a way as to resist such bending.
[0180] [0180] Figures 25 to 27 illustrate an anvil 1130 'that includes features that improve the stiffness of the anvil body and its resistance to bending forces that can be generated during the closing and / or firing processes. Anvil 1130 'may otherwise be identical in construction to 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 cap 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 may have any suitable shape. The perimeter 1172 of the anvil cover 1170 is configured to be inserted
[0181] [0181] 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 mode, a plurality of retaining formations 1182 is defined in the wall 1180 of the upper body portion 1165 which defines the opening
[0182] [0182] 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 retaining formations adjacent to the distal end, the proximal end, or both ends distal and proximal may be less than the spacing of the formations located in the central portion of the anvil cover 1170. In other arrangements, the retention formations 1182 can be more widely spaced in the central areas of the long sides 1177 'of the cover of anvil 1170. In some alternative modalities, the hitch areas with corresponding shape 1184 may not be provided. visits to the outer perimeter 1172 'or portions of the outer perimeter 1172' of the anvil cover 1170 '. In other modalities, the retention formations and the correspondingly shaped coupling areas can be provided with different shapes and sizes. In alternative arrangements, the retention formations can be dimensioned in relation to the coupling areas so that there is no interference fit between them. In such arrangements, the anvil cover can be held in position by welding and / or an adhesive, for example.
[0183] [0183] In the illustrated example, a weld 1178 'extends around the entire perimeter 1172' of the anvil cap 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 at the proximal end 1175 thereof. Weld 1178 'can be continuous or discontinuous or intermittent. In those modalities where 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 weld segments 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 the long sides 1177'. other provisions, the welding segments can be more densely spaced in the central areas on the long sides 1177 'of the anvil cover 1170 ”.
[0184] [0184] Figures 31 and 32 illustrate another anvil arrangement 1130 ", which has an anvil cover 1170" attached to it. The lid of the anvil 1170 ”is approximately rectangular in shape and has an outer perimeter of lid 1172”; however, the 1170 ”anvil cover can comprise any suitable configuration. The outer perimeter of the cap 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" they 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 just along the long sides 1177” of the anvil cover 1170 ”and not on 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 welding mode has a larger welding surface area due to the irregularly shaped perimeter of the anvil cover 1170 ”, in comparison with the modalities with straight perimeter sides such as the anvil covers shown in Figure 26, for example. In those ways where the 1178 ”weld is discontinuous or intermittent, the welding segments can be evenly 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 1177 ”long sides of the 1170” anvil cover.
[0185] [0185] Still referring to Figures 31 and 32, the anvil cover 1170 "can be additionally welded to the anvil body 1132" by a plurality of second discrete "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 evenly distributed along the long sides 1177" of the anvil cover 1170 "or the 1192" welds can be more densely spaced closer to the distal ends. from long sides 1177 ”or more densely spaced closer to the edges near long sides 1177”. In still other arrangements, welds 1192 ”can be more densely spaced in the central areas of long sides 1177” from anvil cover 1170 ” .
[0186] [0186] 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 mode, a tongue and groove arrangement it is used along each 1177 ”long side of the 1170” anvil cover. In particular, a flange 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 out of an opening at the distal end of the anvil body 1132 ”'to fix the anvil cover“ mechanically ”to the anvil body 1132". The flaps 1195 ”and slits 1197” can be dimensioned in relation to each other to establish a sliding friction fit between them. In addition, the anvil cover 1170 "can be welded to the body of the anvil 1132". The anvil body 1132 ”and the anvil cover 1170” can be manufactured from metal that is conducive to welding. The 1178 ”weld can extend around the entire perimeter 1172” of the anvil cover 1170 ”or it can be located just along the long sides 1177” of the anvil cover 1170 ”. The 1178 "” 'weld can be continuous or discontinuous or intermittent. In those modalities where the 1178 "weld is discontinuous or intermittent, the welding segments can be equally distributed along the long sides 1177" of the 1170 "anvil cap or the weld segments can be more densely spaced closer to the distal ends of the long sides 1177 ”or more densely spaced closer to the ends proximal of the long sides 1177”. In still other arrangements, the welding segments can be more densely spaced in the central areas on the 1177 ”long sides of the 1170” anvil cover.
[0187] [0187] 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 fixed 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.
[0188] [0188] Figure 34 provides a side-by-side comparison of two anvils. A portion of a first anvil 2030 of an end actuator 2000 is shown in the right half of Figure 34 and a portion of a second anvil 2030 'of an end actuator 2000' is shown in the left half of Figure 34. 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 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 of pockets of training 2032a and the third longitudinal row of training pockets 2032c.
[0189] [0189] 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 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 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 or intermediate row.
[0190] [0190] The anvil 2030 comprises a flat, or at least substantially flat 2037 engaging surface. The forming pockets 2032a, 2032b and 2032c are defined on the flat surface 2031. The flat surface 2031 has no defined steps thereon; however, arrangements are envisaged in which the anvil 2030 may comprise a stepped fabric engagement surface. For example, the anvil 2030 'comprises a stepped fabric engagement surface 2031 ".
[0191] [0191] 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 tissue captured 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 stroke. 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. Coupling member 2042' comprises projections, or cams, 2043 ' which extend laterally from it, which are configured to engage the anvil 2030 'during the course of staple firing. Referring to Figure 37, projections 2043 'comprise longitudinally elongated bulkheads extending from 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 flat sides or ends, 2047.
[0192] [0192] 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 slit 2033 'have a rectangular, or at least substantially rectangular configuration, with sharp corners. Each side portion 2033!' of the slot 2033 'comprises a longitudinal cam surface 2035' configured to be engaged by the projections 2043 'during the clamping stroke. Each longitudinal cam surface 2035' is defined on the upper side of a projection 2037 'extending longitudinally to the along the slit 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 with respect to the fixed end. each longitudinal projection 2037 'may comprise a cantilever strip.
[0193] [0193] The coupling member 2042 'additionally comprises a foot, or cam, 2044 (Figure 35), configured to engage the staple cartridge 2010, or a claw that supports the staple cartridge 2010, during the firing stroke staples. 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 that holds 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 ".
[0194] [0194] 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 slide that has distally inclined surfaces during a staple firing stroke. The inclined surfaces are configured to lift staple actuators within the staple cartridge 2010 to form staples 2020 against the anvil 2030 and eject staples 2020 from the staple cartridge 2010. Coupling member 2042 comprises projections, or cams, 2043 that are - tend laterally from the same, which are configured to engage the anvil 2030 during the course of staple firing. The 2043 projections have curved or rounded sides or side ends, 2047. The 2047 side ends of the 2043 projections are either completely curved or completely rounded. Each side edge 2047 comprises an arcuate profile that extends between a top surface of a projection 2043 and a bottom surface of the projection 2043. In other embodiments, the side ends 2047 of the projections 2043 are only partially curved.
[0195] [0195] The longitudinal slot 2033 comprises side portions 2033] which extend laterally from a central portion 2033c, which are configured to receive projections 2043. Each side portion 2033 | the slot 2033 comprises a longitudinal cam surface 2035 configured to be engaged by the projections 2043 during the staple firing stroke. Each longitudinal cam surface 2035 is defined on the upper 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 with respect to the fixed end. In this way, each longitudinal projection 2037 can comprise a cantilever strip. As shown in Figure 34, the lateral portions of the longitudinal slot 2033 comprise a curved or rounded profile, which corresponds, or corresponds at least substantially, to the curved ends 2047 of the projections 2043.
[0196] [0196] The 2042 coupling member additionally comprises a foot, or cam, 2044 (Figure 35), configured to engage the staple cartridge 2010, or a claw that holds the staple cartridge 2010, during the firing stroke of the 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 relative to the staple cartridge 2010, the coupling member 2042 can cam the anvil 2030 to the position in relation to the staple cartridge 2010. When the staple cartridge 2010, or the claw that holds the staple cartridge 2010, is movable with respect to the anvil 2030, the coupling member 2042 can cam move the staple cartridge 2010 to the position with respect to the anvil 2030.
[0197] [0197] Again with reference to Figure 34, the side portions 2033I 'of the longitudinal slit 2033' extend along a distance 2034 'from a centerline CL of the anvil 2030 ". The side portions 2033I' extend on the training pockets 2032a on the shoulder 2030 'or behind them, as shown in Figure 34, the lateral ends of the lateral portions 2033 / I' are aligned with the outer edges of the training pockets 2032a. are provided in which the side portions 2033 / I '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 driving surfaces 2045 'defined at the bottom of the projections 2043' are not in contact with the contact surfaces. me 2035 '. In these cases, the contact between the projections 2043 'and the cam surfaces 2035' can be reduced to a point, such as point 2047 ', for example. In some cases, the contact between the projections 2043 'and the cam surfaces 2035' may be reduced to a longitudinally extending line, which may appear to be a point when viewed from the distal end of the end actuator, as illustrated in Figure 36.
[0198] [0198] 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 provided in which the lateral ends of the projections 2043 'are aligned with the longitudinal central line 2062a of the formation 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' are not 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 edge outside of the training pockets 2032a or beyond, for example.
[0199] [0199] In addition to the above, the projections 2037 'and the projections 2043' can deflect in a way that causes the charge flowing between the firing member 2040 'and the anvil 2030' to be applied to the inner ends of the protrusions 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 of the projections 2043 ', is the same or similar to that of the cantilever strips. As the reader should appreciate, the deflection of a cantilever strip is proportional to the cube of the strip length when the load is applied in the end of the strip in cantilever. In any case, gaps can be created between the projections 2037 'and the projections 2043' when the projections 2037 'and / or the projections 2043' deflect. Such gaps between portions of the projections 2037 ' and 2043 projections '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 the 2037' projections and 2043 projections. This interaction is represented by elevators or stress concentrations 2039 'and 2049' in Figures 38 and 39, with stress elevators 2039 'being present on ridges 2037' and stress elevators 2049 'are present at the interconnection between projections 2043' and the limb 2042 'coupling. Other stress elevators or concentrations may be present, but, as discussed below, it is desirable to reduce or eliminate these stress elevators.
[0200] [0200] Again with reference to Figures 34 and 35, each of the side portions 2033 | of the longitudinal slot 2033 extends over a distance 2034 from a centerline CL of the anvil
[0201] [0201] 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, the side portions 2033 | l do not extend laterally over or overlap the forming pockets 2032a. Such shorter side portions 2033l, in addition to the above, can reduce the 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 cam surfaces 2035 ".
[0202] [0202] 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 protrusions 2037 have a thickness in tapered cross section where the base of each protrusion 2037 is wider than its inner end due to the rounded lateral ends of the 2033I side slot 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.
[0203] [0203] 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 projections
[0204] [0204] 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 projections 2037 and projections 2043, which can reduce or eliminate the stress elevators discussed above in relation to the projections 2037 'and projections 2043', for example.
[0205] [0205] Again with reference to Figure 35, the foot 2044 of the coupling member 2042 is wider than the projections 2033. In other words, 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 may 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, such modalities can be configured in another way to provide the desired deflection and / or tension within the 2033 projections.
[0206] [0206] As discussed above, an end actuator can 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 distally advanced to perform a staple firing stroke. In any case, the anvil may not move to its completely 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 may actually deflect or deform during the course of firing clips from the firing member. Such circumstances are generally controlled, however, by the upper projections and the lower leg of the firing member.
[0207] [0207] 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, the driving surfaces 2045 'engage the cam surfaces 2035' in a face-to-face relationship when the 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, the driving surfaces 2045 'may not always be aligned with the cam surfaces 2035' and, in such cases, the projections 2043 'may extend into the projections 2037' of the anvil 2030. Figure 37 shows such cases with solid lines.
[0208] [0208] 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 clamping 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 subsequent clamp firing strokes with end actuator 2000 'may increase in such cases if end actuator 2000' is reused.
[0209] [0209] 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 anvil 2030 or 2030 ', for example, and in addition, a foot 2144 configured to engage a staple cartridge jaw during the staple firing stroke. . Each projection 2143 comprises a drive surface 2145 defined on the underside thereof. Each projection 2143 further comprises a cam transition that extends proximally 2147 and a radiated transition 2149 that extends around the perimeter of the projection 2143. The coupling member 2142 further comprises intermediate projections 2146 that extend laterally from the same , 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 staple trigger course.
[0210] [0210] 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 In this 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 0 degrees in relation to the longitudinal path 2160 during progressive closing, then the driving surface 2145 could be oriented at about 2 degrees in relation to the longitudinal path 2160, for example, which represents the midpoint in the progressive closing range. 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 in about 1 degrees 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 over 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 over 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 0 degree.
[0211] [0211] In addition to the above, the driving surface 2145 of the projection 2143 is not parallel to the driving surface of the foot
[0212] [0212] 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 application can be adapted to any movable jaw.
[0213] [0213] Now with reference to Figures 43 to 45, a firing member 2240 comprises a firing member and a coupling member 2242 attached to the firing member. 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 anvil 2030 or 2030 ', for example, and, in addition, a foot 2144, configured to engage a staple cartridge jaw during the firing stroke. Bobby pins. Each projection 2243 comprises a drive surface 2245 defined on the underside thereof. Each projection 2243 further comprises a radiated transition 2249 which extends around its perimeter. Coupling member 2242 further comprises intermediate projections 2146 extending laterally therewith, which are configured to prevent trigger member 2240 from executing the staple firing stroke when an unused staple cartridge is not used. it is positioned in front of the firing member 2240 at the beginning of the staple firing stroke.
[0214] [0214] 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 2243 projection is different from the rear or rear end of the 2243 projection. The front end 2251 comprises a radius that extends from the bottom drive surface 2245 of the 2243 projection to a location positioned above a line longitudinal central 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
[0215] [0215] Now with reference to Figures 46 to 48, a firing member 2340 comprises a firing member and a coupling member 2342 attached to the firing member. 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 anvil 2030 or 2030 ', for example, and, in addition, a foot 2144, configured to engage a staple cartridge jaw during the firing stroke. Bobby pins. Each 2343 projection comprises a drive surface defined on the underside of it. Each projection 2343 additionally 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 trigger course when an unused staple cartridge is not used. it is positioned in front of trigger member 2340 at the start of the staple trigger stroke.
[0216] [0216] 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. The anterior end 2251 has a different configuration from the rear end of the projection 2243. Each projection 2343 additionally comprises a side or side end 2352. Each side end 2352 comprises a flat surface that is positioned between radiated or curved edges 2347. A first radiated edge 2347 is positioned between a top surface of the projection 2343 and the side end 2352 and, in addition, a second radiated edge 2347 is positioned between a bottom surface of the projection 2343 and the side end 2352.
[0217] [0217] Now with reference to Figures 49 to 51, a firing member 2440 comprises a firing member and a coupling member 2442 attached to the firing member. Coupling member 2442 comprises a connector 2148 that connects coupling member 2442 to the firing bar. Coupling member 2442 further 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 anvil 2030 or 2030 ', for example, and in addition, a foot 2144, configured to engage a staple cartridge jaw during the firing stroke. Bobby pins. 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 additionally comprises intermediate projections 2146 extending laterally from it, which are configured to prevent trigger member 2440 from executing the staple trigger course when an unused staple cartridge is not used. it is positioned in front of trigger member 2440 at the start of the staple trigger stroke.
[0218] [0218] In addition to the above, the lateral sides, or ends, of each projection 2443 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 primarily to Figure 51, the first radius of curvature 2447a extends upward beyond a center line 2450 of projection 2443.
[0219] [0219] Now with reference to Figures 52 to 54, a firing member 2540 comprises a firing member and a coupling member 2542 attached to the firing member. 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 anvil 2030 or 2030 ', for example, and, in addition, a foot 2144, configured to engage a staple cartridge jaw during the firing stroke. Bobby pins. Each 2543 projection comprises a drive surface defined on the underside of it. 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 trigger member 2540 at the start of the staple trigger stroke.
[0220] [0220] In addition to the above, each projection 2543 comprises a side or side end 2552 that is flat, or at least substantially flat. Each projection 2543 additionally comprises a radiated transition 2547 that extends around the side edge
[0221] [0221] With reference mainly to Figure 53, the front end 2551 of each projection 2543 is positioned distally with respect to a cutting edge 2042 of the cutting portion 2041. The posterior end 2559 of each projection 2543 is positioned in position proximal 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.
[0222] [0222] Now with reference to Figures 55 to 57, a firing member 2640 comprises a firing member and a coupling member 2642 attached to the firing member. 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 anvil 2030 or 2030 ', for example, and in addition, a foot 2144, configured to engage a staple cartridge jaw during the firing stroke. Bobby pins. 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 further 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 used. it is positioned in front of firing member 2640 at the start of the staple firing stroke.
[0223] [0223] 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. longitudinal firing member 2660. Referring mainly to Figure 57, the top surface 2647 is flat, but not parallel to the longitudinal firing path 2660. In addition, the top wall 2647 is not parallel to the bottom 2645. As a result, each 2643 projection 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 2643.
[0224] [0224] Now with reference to Figures 58 to 60, a firing member 2740 comprises a firing member and a coupling member 2742 attached to the firing member. 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 anvil 2030 or 2030 ', for example, and in addition, a foot 2144, configured to engage a staple cartridge jaw during the firing stroke. Bobby pins. Each 2743 projection comprises a drive surface defined on the underside of it. Coupling member 2742 further comprises intermediate projections 2146 extending laterally from it, which are configured to prevent trigger member 2740 from executing the staple firing stroke when an unused staple cartridge is not used. it is positioned in front of the firing member 2740 at the beginning of the staple firing stroke.
[0225] [0225] 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 anvil initially. The front portion 2753a additionally comprises a first front or drive surface 2745a defined on its bottom side. 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.
[0226] [0226] 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 2740 during the staple firing stroke. In some cases, however, only the front drive surface 2745a can engage the defined cam surface on the anvil. Such cases can arise when the firing member 2740 progressively closes the anvil, for example.
[0227] [0227] 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 surface
[0228] [0228] 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 anvil cam surfaces. When the anvil begins to flex due to the staple-forming load that is applied to the anvil, in some cases, the anvil may flex upwards in contact with the anterior drive surfaces 2745a, as shown in Figure 71.
[0229] [0229] 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 projections 2743 will be able to remain in contact with the stool during the staple firing stroke even though the firing member 2740 is being used to progressively close the stool . In addition, the anterior portion 2753a also has a greater shear thickness than the posterior portion 2753b which can better withstand the shear forces transmitted through the 2743 projections. The anterior portion 2753a is frequently exposed to forces greater than the previous 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.
[0230] [0230] Now with reference to Figures 61 to 63, a firing member 2840 comprises a firing member and a coupling member 2842 attached to the firing member. 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 firing stroke. Bobby pins. 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 from it, which are configured to prevent trigger member 2840 from executing the staple firing stroke when an unused staple cartridge is not positioned in front of firing member 2840 at the start of the staple firing stroke.
[0231] [0231] 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.
[0232] [0232] 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 modalities,
[0233] [0233] In addition to the above, the forward 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 in several places and that the plastic deformation of the projections is reduced.
[0234] [0234] 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 firing course, identified as 3090. The firing course 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 disclosed here.
[0235] [0235] 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 should be understood that such a desired result may not be achieved in some circumstances due to the manufacturing tolerances of the stapling instrument and / or due to the variability in the thickness of the tissue trapped 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.
[0236] [0236] 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 anvil. The 2945 ridges are configured to wear out quickly, or to 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 run multiple clamp firing strokes. In addition to or instead of the above, one or more blocks to be used close to the body can be attached to the projections of the firing member which can be configured to deform plastically.
[0237] [0237] 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 in in relation to a corresponding jaw such as a staple cartridge jaw. Modalities are provided in which the anvil claw is fixed in relation to the clamp cartridge claw and, in such cases, the clamp cartridge claw can rotate in relation to the anvil claw. The body of the beaker 3101 additionally comprises a distal tip portion 3104, outer edges 3107 and a flat surface facing the fabric 3106. The surface facing the fabric 3106 comprises staple forming pockets defined therein configured for deformation - attach the staples during a surgical stapling procedure. The anvil body 3101 additionally comprises a longitudinal cavity, or aperture, 3105 configured to receive the anvil cap 3110 therein. As discussed in greater detail below, the longitudinal cavity 3105 can comprise corresponding surfaces configured to fit with the corresponding surfaces of the anvil cover 3110 during assembly. Certain surfaces can be configured for welding, while others can be configured only for alignment during assembly.
[0238] [0238] 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 bib cover 3110 comprises a rounded upper surface 3114. The upper surface 3114 may be contoured and / or rounded, for example, to provide a continuous curved upper surface of the surgical stapling beak 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.
[0239] [0239] The 3100 two-piece surgical stapling anvil can allow the internal surfaces inside the anvil 3100 to be polished during manufacture. The manufacture of these parts can include processes that result in a less than desirable surface finish of various surfaces within the anvil. Improving the finish of various internal surfaces can reduce the internal frictional forces between the anvil and a staple firing member that passes through it. Reducing the internal frictional forces can reduce the force required for the firing member to move through its staple firing stroke. Reducing the force required for a firing member to move through its clamp firing stroke can result in a reduction in the size of certain components, resulting in a reduction in the total size of the instrument, which is desirable. Such an arrangement can also reduce the number of instances of instrument failure. That said, a two-part welded anvil can present challenges. For example, a two-piece welded anvil can deflect more than a single anvil in some cases. In other words, a two-piece anvil may be less rigid than a single anvil and less resistant to bending. In addition, the lateral deflection, or rotation, of the sides of an anvil in the opposite direction to a firing member or longitudinal geometric axis of the instrument can cause the clamps to deform inappropriately. Such deflection can result in a vertical expansion of the general system, which results in clamps formed with a formed height that is not the desired formed height. In addition, this deflection can allow a firing member to tear vertically through an anvil from which it is in cam contact. In addition, transverse deflection, or rotation, may require more firing force to be applied for the firing member to complete its firing stroke. For example, the distal portion of an anvil may deflect in the opposite direction to the staple cartridge due to tissue-induced pressure. Minimizing this deflection can be important to create properly formed clamps. Having said that, the presence of transverse deflection and lateral deflection can have a cumulative effect. In fact, transverse deflection can induce lateral deflection of the anvil.
[0240] [0240] Figure 74 shows a portion of a surgical stapling instrument 3200 comprising an anvil body 3210 and an anvil cap 3220 welded to the body of the anvil 3210 with a 3201 weld. Although only a portion of the stapling anvil surgical 3200 is 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 additionally 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 rigidity of the anvil. The anvil cap 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.
[0241] [0241] The upper portion 3223 of the anvil cover 3220 and the anvil body 3210 are welded together with weld 3201. Access to the weld is provided by chamfered edges on one or both of the anvil body 3210 and the anvil cover 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 identified by 3202. Weld depth 3202 is about 0.030 inch, for example. In particular, weld 3201 does not penetrate anvil 3200 into the horizontal surfaces of projections 3217, 3224. With this arrangement, anvil body 3210 will tend to deflect in a rotational manner around the pivot axis P due to the combination of applied forces. - attached to the body of the anvil 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 push the surface facing the fabric 3211, represented by the loading force distributed 3232, both sides of the anvil body 3210 (only one shown in Figure 74) may tend to rotate around a pivot axis and P and deflect vertically and / or outwardly in relation to the firing member and the anvil 3220. This deflection, represented by deflection 3233, is permitted due to the lack of penetration of the weld from the solder arrangement provided. In some cases, the body of the anvil 3210 and the cover of the anvil 3220 can separate into a non-welded portion, or joint, 3204 that is 3203 in length.
[0242] [0242] Figure 75 shows a portion of a surgical stapling anvil 3300 comprising an anvil body 3310 and an anvil cover 3320 welded to the body of the anvil 3310 with a 3301. weld Although only a portion of the stapling anvil surgical 3300 is illustrated, it should be understood that there is a mirrored portion of the illustrated portion 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 longitudinal slot 3313 configured to receive a firing member through it. The anvil body 3310 additionally comprises outer 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 stroke. staple firing. The anvil body 3310 further comprises an upper portion 3317 extending from the slot 3313 to the outer edge 3314. The anvil cover 3320 comprises an upper portion 3323, a lower portion 3321 and a projection 3224 configured to rest on the projection 3317 before, during and after welding.
[0243] [0243] The protrusion 3324 of the anvil cap 3320 and the top portion 3317 of the anvil body 3310 are welded together with the weld
[0244] [0244] Figure 76 shows a portion of a surgical staple anvil 3400 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 stapling anvil surgical 3400 is illustrated, it must be understood that there is a mirrored portion of the illustrated portion to complete the surgical stapling anvil 3400. 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 anvil cam features a firing member of a surgical stapling instrument, and a longitudinal slot 3413 configured to receive the firing member through it. The anvil body 3410 additionally comprises external edges 3414. The projections 3415 are configured to support or support a distributed load force 3431 applied by the firing member as the firing member moves through a staple firing stroke. The 3410 burner body additionally comprises a projection 3417 configured
[0245] [0245] The upper portion 3423 of the anvil cap 3420 and the anvil body 3410 are welded together with the weld 3401. The weld access is provided by chamfered edges on one or both of the anvil body 3410 and the anvil cover 3420. In this case, the weld surfaces of the anvil body 3410 and the anvil cover 3420 are angled and, as a result, weld 3401 is angled. Weld 3401 comprises a weld length, or depth, marked 3402. The weld depth 3402 is about 0.030 inch, for example. In particular, the solder 3401 does not penetrate the anvil 3400 into the horizontal surfaces of the projections 3417, 3424 and, with this arrangement, the anvil body 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 firing member and the fabric can generate the deflection represented by the 3433 deflection. As the firing member makes cam contact with the anvil 3400 towards the opposite staple cartridge, pressing the protrusions 3415, represented by the distributed load force 3431, and the fabric and the cartridge push the surface facing the fabric 3411, represented by the distributed load force 3432, both sides of the anvil body 3410 (only one shown in Figure 76) may tend to rotate around the pivot axis P. However, the angled weld surfaces
[0246] [0246] 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 actuation surfaces configured to be engaged by the anvil cam actuation features of a firing member of the surgical stapling instrument, and a 3513 longitudinal slot configured to receive a firing member through it. 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 clamp 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 the assembly of 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 anvil 3500. The cover of the anvil 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.
[0247] [0247] The upper portion 3523 of the anvil cover 3520 and the anvil body 3510 are welded together with 3501 welds. Only one weld 3501 is illustrated to provide clarity of the relationship between the anvil body 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 weld 3501 comprises a length, or depth, of weld, marked 3502. The depth, or penetration, of weld 3502 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 penetration of the weld can help prevent deflection of the anvil rotationally as well as vertically. In other words, having welds with a weld penetration depth equal to or greater than the length of angled weld surfaces can increase the moment of inertia and the total stiffness of the anvil
[0248] [0248] 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 that comprises a plurum staple formation pockets 3612 defined therein,
[0249] [0249] The anvil 3600 comprises a massive 3606 unsealed weld width and also a massive 3605 slit cavity width. The 3606 non-welded width is about 125% of the cavity width
[0250] [0250] Figure 79 represents an anvil 3700 which comprises an anvil body portion 3710 and an anvil cover 3720. The anvil body portion 3710 comprises a flat volumetric surface
[0251] [0251] The anvil cover 3720 comprises a Y-shaped cross section. The anvil cover 3720 comprises a lower portion 3721 configured to be received into the slot 3713 defining a first fitting region and an upper portion 3723 configured to be welded to the anvil body 3710. The upper portion 3723 comprises projections, or shields, 3724 that comprise horizontal alignment surfaces configured to rest on the corresponding horizontal alignment surfaces of the projections 3716. This interface defines a second fitting region that is perpendicular, or at least substantially perpendicular, to the first fitting region. The horizontal alignment surfaces are at least substantially parallel to the fabric-facing surface
[0252] [0252] 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 geometric center of the anvil 3700. At the non-welded width 3706, that is, the width between the welds, defines an external contour geometric axis 3731 which is a first distance 3731D from the central geometric axis CA. The internal staple forming pockets 3712A define a row geometric axis 3732 which is a second distance 3732D from the central geometric axis CA. The second distance 3732D is shorter than the first distance 3731D. As a result, all, or at least a portion of the internal staple forming pockets 3712A are defined within the non-welded width 3706. In other cases, the internal staple forming pockets 3712A are positioned entirely outside the non-welded width
[0253] [0253] 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 external contour geometry axis 3731D extends from the central geometry axis CA, can increase the total stiffness of the anvil 3700 to reduce flexion, or deflection, longitudinal and rotational, or torsional, of the 3700 anvil.
[0254] [0254] 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 comprising an un-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 cover 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 angled weld surfaces. In at least one case, the weld depth is less than 0.03 inch, for example. The model D represents the anvil 3700. The anvil cover comprises a non-welded width of approximately 105% of the slot width and the angle of the angular welding surfaces of model D allows a weld depth to be created that merges the entire length of the angled weld surfaces. In at least one case, the weld depth is at least 0.03 inch, 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 the protrusions on model A.
[0255] [0255] 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. The 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 body of the anvil 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 relative to a corresponding claw such as a staple cartridge jaw. Modalities are provided in which the anvil claw is fixed in relation to the clamp cartridge clamp and, in these cases, the clamp cartridge clamp can rotate in relation to the anvil claw. The anvil body 3910 additionally comprises a distal tip portion 3914 and a flat surface facing the fabric 3911. The surface facing the fabric 3911 comprises staple forming pockets 3912 defined therein that are configured to deform the staples during a surgical stapling procedure. The anvil body 3910 comprises a longitudinal slit 3913 configured to receive a firing member of the surgical instrument through it. The anvil body
[0256] [0256] Referring to Figure 81, the anvil cover 3920 comprises a plurality of shallow welding zones 3930 each comprising a length of zone 3930L, and a plurality of deep welding zones 3940, each comprising a zone length 3940L. Zone lengths 3930L, 3940L are the same; however, in other cases, the lengths of 3930L, 3940L are different. Each shallow weld zone 3930 of cover 3920 comprises an upper portion 3933 and a lower portion 3931. The upper portions 3933 comprise extended body portions 3934 that include welding surfaces 3935. The extended body portions 3934 are configured to sit on alignment projections 3916 on the anvil body 3910, while the welding surfaces 3935 are configured to engage, or engage, with welding surfaces at an angle 3917 corresponding to the body of the anvil 3910 (Figure 82). Each deep weld zone 3940 comprises an upper portion 3943 and a lower portion 3941. The lower portion 3941 is accessible through a window 3945 that extends through the upper portion 3943 of the deep weld zone 3940. The upper portions 3942 comprise protrusions of alignment 3944, accessible through the weld access region 3945, which are configured to rest on the corresponding alignment projections 3418 of the anvil body 3910. The alignment projections 3916 are at a first distance from the surface the surface facing the 3911 fabric and the alignment projections 3944 are a second distance from the surface facing the 3911 fabric. The first distance is greater than the second distance. In other cases,
[0257] [0257] 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 protrusion
[0258] [0258] The 3930 shallow weld zones and the 3940 deep weld zones are configured to increase the total weld depth along the 3900 anvil length. The location, longitudinal length and quantity of the 3930 shallow weld zones 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 may 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 3900 anvil stiffness and reduce the probability of rotational deflection within the 3900 anvil. Arrangements are foreseen 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 extend a length L 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 weld and the deep weld are made. As a result, such an anvil would comprise a shallow weld and a deep weld along the entire length of the anvil.
[0259] [0259] Several surgical stapling anvils disclosed herein 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 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.
[0260] [0260] A method for making a surgical stapling anvil such as those disclosed 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 can comprise, for example, a laser welding process. Yet another stage of fabricating an anvil comprises stamping the staple-forming, or fastener-forming pockets, on a surface facing the fabric of the anvil's body portion.
[0261] [0261] In addition to the above, the polishing step may involve polishing several areas of the cam surfaces, or protrusions, of the anvil. The projections may comprise a first zone and a second zone, the first zone being configured to be placed in 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 in 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 seizures on the projections when placed in contact with the firing member.
[0262] [0262] 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 staple forming pockets 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. . In addition, the anvil cover 4020 is welded to the anvil body 4010. A welder, such as a laser welder, can access the anvil body 4010 and the anvil cover 4020 through the welder access regions. 4005. The 4005 welder access regions comprise openings, or beveled edges, to provide space for a welder to access the location to be welded. Larger regions of access from the welder can ensure a deeper penetration depth of the weld.
[0263] [0263] 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 rigidity 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
[0264] [0264] The additional angular surfaces 4017, 4027 and the horizontal surfaces 4016, 4018, 4026, 4028 are configured to assist in the assembly of the 4010 anvil body and the 4020 anvil cover before 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 seat in relation to the body of the anvil 4010.
[0265] [0265] 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 through it. 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.
[0266] [0266] 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 direction opposite 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 vertically extending interlocking features 4116 received within the corresponding openings 4136 of the second anvil member 4130. In many 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 4130.
[0267] [0267] 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 interlocking features can increase the overall strength of an anvil as well as reduce transverse deflection and / or torsional deflection. The interlocking features 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 and the second anvil member is limited to a plane of movement. 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.
[0268] [0268] 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 therethrough. 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.
[0269] [0269] 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
[0270] [0270] 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. The surgical stapling set 4300 comprises an anvil claw 4340 which comprises 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 jaw 4340 with respect to the cartridge channel jaw 4330 with a cam mechanism. That said, modalities are provided in which the cartridge channel jaw 4330 is pivoted in relation to the anvil jaw 4340. The body of the anvil 4350 comprises a surface facing the fabric 4351 which comprises a plurality of staple forming pockets defined therein. which are configured to deform staples ejected from a surgical staple cartridge. The stapling assembly 4300 further comprises a firing member 4370 configured to move longitudinally within a groove 4357 of the anvil claw 4340 and within 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 claw 4340 and the cartridge channel claw 4330 during a firing stroke.
[0271] [0271] The 4300 surgical stapling set comprises means to improve the overall stiffness and strength of the anvil claw 4340 by reducing the stiffness of the 4330 cartridge channel jaw. The cartridge channel comprises 4334 channel walls comprising proximal wall portions 4335 and distal wall portions
[0272] [0272] 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
[0273] [0273] Referring mainly to Figure 92, the 4335 proximal wall portions comprise a cutout comprising a wall thickness that is less than the distal wall portions
[0274] [0274] In addition to the above, the anvil claw 4340 comprises a first stiffness and the cartridge channel claw 4330 comprises a second stiffness. The 4300 stapling assembly 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.
[0275] [0275] 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 cover portion 4430. Such an arrangement may allow the polishing of the various internal surfaces of the 4400 channel claw during manufacture 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.
[0276] [0276] Longitudinal cavity 4415 of body portion 4410 defines projections 4413 (Figure 95) that are configured to hold cover portion 4430 in place in relation to body portion 4410 for welding. The cap portion 4430 comprises cap walls 4433 and is welded to the body portion 4410 with 4409 welds. 4409 welds may comprise laser welds, for example. The cover 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 inner surfaces of the lid portion 4430 as well as the projections 4413 are polished. Polishing the projections 4413 can be advantageous, so that as the firing member moves through its clamping firing stroke, the polished projections 4413 can reduce the friction between the claw of the 4400 cartridge channel and the firing member and, therefore, the seizure of surfaces, which would increase the force to fire the surgical instrument. In other cases, only certain surfaces of the 4430 cover portion are polished. In such cases, only the horizontal surface 4435 of the lid portion 4430 and the projections 4413 can be polished.
[0277] [0277] Figures 96 to 107 compare two different firing members 4500, 4600 for use with surgical stapling systems 4800, 4700, respectively. The firing member 4500 (Figure 96) comprises a body 4510 comprising a proximal connection portion 4512 and a cutting member 4511 configured to cut the fabric during a staple firing course. The firing member 4500 additionally comprises a channel claw coupling member 4520 and an anvil claw coupling member 4530 configured to hold an anvil claw and channel claw in a fixed position relative to each other during a stroke. firing clips from firing member 4500. Similarly, firing member 4600 (Figure 97) comprises a body 4610 comprising a proximal connecting portion 4612, a cutting member 4611 configured to cut tissue during a stroke trigger clip, and a 4615 locking feature. The trigger member 4600 additionally comprises a channel claw coupling member 4620 and an anvil clutch coupling member 4630 configured to secure a claw clamp. anvil and a channel claw relative to each other during a clamping stroke of the 4600 firing member.
[0278] [0278] 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 lateral sides. of the 4510 body. The projections are in the form of fillets in relation to the 4510 body with 4532 fillets. The 4531 projections also comprise 4533 outer rounded corners. The anvil claw coupling member 4530 defines an upper flat surface 4534. Each projection 4531 comprises a width or lateral thickness 4545 and a vertical thickness 4541. The lateral width 4545 is defined as the distance between the body 4510 and an outer edge 4536 of the projection 4531. The lateral projections 4531 define a geometric axis of projection 4543 which is angled about one degree with respect to the horizontal surface of the trigger member 4500 such as, for example, an upper cam surface 4521 of the claw coupling member of the channel 4520. The angle d the 4531 projections can reduce the seizure of the contact surfaces. The side projections 4531 additionally comprise a longitudinal length 4542 (Figure 102) defined as the distance between an anterior edge 4535 of the projection 4531 and a posterior edge 4537 of the projection 4531.
[0279] [0279] 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 protrusion and, in turn, reduce the deflection of the projections 4531 of the firing member 4500. These provisions also encourage pure shear as the main source of deflection, which increases the capacity projections to resist deformation. Arrangements where flexion of projections is the main source of deflection can cause projections with a greater likelihood of plastic deformation.
[0280] [0280] Now with reference to Figures 100 and 101, the coupling member of the anvil claw 4630 comprises lateral projections, or anvil cam features, 4631 that extend from the lateral 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 a front edge 4635 of the 4631 projection and a rear edge 4637 of the 4631 projection. The longitudinal length 4542 is greater than the longitudinal length 4642.
[0281] [0281] 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 4710 staple cartridge installed inside the 4780 cartridge channel claw. The 4700 stapling system 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 tissue-facing surface, 4711 and a longitudinal slot 4713 configured to receive the firing member 4600 therethrough. Anvil claw 4750 comprises a tissue-facing surface 4751 comprising a plurality of clamp-forming pockets 4752 configured to deform clamps, an anvil slot 4753 configured to receive claw coupling member 4630 from the member of firing 4600 therethrough, and cam projections 4755 configured to engage with projections 4631 of firing member 4600 as firing member 4600 moves through its staple firing course. Channel 4780 comprises channel walls 4781, a longitudinal slot, or cavity, 4785 configured to receive claw coupling member 4620 therethrough, and cam protrusions 4783 configured to be engaged by claw coupling member 4620 with - form the firing member 4600 that 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.
[0282] [0282] Now going back to Figure 105, a stapling system
[0283] [0283] 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
[0284] [0284] In certain cases, balancing the stiffness of projection 3715 and projections 4531 will balance the magnitude of deflection 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 another and possibly not at all during the shooting course. In several 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 geometries of the projection and projection, the materials of the projection and projection can be selected based on the elastic limit values and / or hardness, for example. Having materials with similar elastic limit values and / or hardness values of the materials can promote equal or balanced deflection values of the projection and projection.
[0285] [0285] 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 the application of a distributed load 4903 by the firing member 4500 to the projections 3715 and the application of a distributed charge 4905 through the fabric and the cartridge 4810 to the surface facing the fabric 3711 results in a deflection 4901 and a stress profile, as illustrated. The stress analysis shows low stress regions 4907, medium stress regions 4908 and high stress regions 4909. In particular, the stress at or near weld 3701 is evenly distributed and is not located, or concentrated, at or near weld 3701.
[0286] [0286] 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 from 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.
[0287] [0287] Another way to reduce the firing force may include coating at least the polished surfaces of the anvil with a material to reduce the friction coefficient on those surfaces. This coating can comprise Medcoat 2000, for example.
[0288] [0288] During the manufacture of the various welded anvil designs disclosed herein, 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, which have not undergone an X-ray stage, pass a quality control test.
[0289] [0289] Various materials to increase strength and / or provide desirable welding materials can be used in the manufacture of the various two-piece anvil designs disclosed here. For example, a tungsten and rhenium alloy can be used for the anvil cover material. In several cases, a W-3, W-5, W-25, or W-26 tungsten and rhenium alloy can be used for the anvil cover material. In some cases, a silver and nickel plate can be used for the anvil cover and a stainless steel 416 or stainless steel 17-4 can be used for the anvil body, for example.
[0290] [0290] 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 cover if both are made using a softer material.
[0291] [0291] In certain cases, rows of formation 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 can 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 between the rows difficult.
[0292] [0292] Example 1 - A surgical stapling anvil for use with a surgical instrument, the surgical stapling anvil comprising an anvil body comprising a tissue-facing surface comprising a plurality of staple forming pockets defined therein and a longitudinal cavity defined therein. The longitudinal cavity comprises a first cavity portion comprising a first width, the first cavity portion being configured to receive at least a portion of a cutting edge of a firing member of the surgical instrument through it, a second cavity portion comprising a second width that is greater than the first width, the second cavity portion being configured to receive an anvil engaging portion of the firing member therethrough, and a third cavity portion comprising a third width which is greater than the second width, the third cavity portion additionally comprising a first angled surface which extends outwardly in relation to the second cavity portion. The anvil further comprises an anvil cover comprising a first section positioned within a portion of the second cavity portion and a second section positioned within the third cavity portion, the second section comprising a second angled surface corresponding to the first angled surface, and an embedded portion of the first angled surface and the second angled surface define an embedded depth. The anvil further comprises a weld to weld the first angled surface and the second angled surface together, the weld comprising a weld depth that is substantially equal to the embedded depth.
[0293] [0293] Example 2 - The surgical stapling anvil, according to Example 1, in which the anvil cover comprises a Y-shaped cross section.
[0294] [0294] Example 3 - The surgical stapling anvil, according to Examples 1 or 2, where the weld depth is between about 0.015 inch and about 0.040 inch.
[0295] [0295] Example 4 - The surgical stapling anvil, according to Example 3, where the weld depth is 0.030 inch.
[0296] [0296] Example 5 - The surgical stapling anvil, according to Examples 1, 2, 3 or 4, in which the third cavity portion comprises a first protruding surface, in which the second section comprises a second projection surface that corresponds to the first projection surface, and the first projection surface and the second projection surface are at least substantially parallel to the surface facing the fabric.
[0297] [0297] Example 6 - The surgical stapling anvil, according to Example 5, in which the weld extends into the protruding surfaces.
[0298] [0298] Example 7 - The surgical stapling anvil, according to Examples 1, 2, 3, 4, 5 or 6, in which the weld comprises a laser weld.
[0299] [0299] Example 8 - The surgical stapling anvil, according to Examples 1, 2, 3, 4, 5, 6 or 7, in which the weld depth is less than the embedded depth.
[0300] [0300] Example 9 - The surgical stapling anvil, according to Examples 1, 2, 3, 4, 5, 6 or 7, in which the weld depth is greater than the embedded depth.
[0301] [0301] Example 10 - The surgical stapling anvil for use with a surgical instrument, the surgical stapling anvil comprising a first anvil member comprising a tissue-facing surface comprising a plurality of defined staple forming pockets in it and a longitudinal cavity. The longitudinal cavity comprises a first cavity portion comprising a first width, the first cavity portion being configured to receive at least a portion of a cutting edge of a firing member of the surgical instrument through it, a second cavity portion comprising a second width which is greater than the first width, the second cavity portion being configured to receive an engaging portion of the firing member anvil therethrough, and a third cavity portion comprising a third width that is greater than the second width. The anvil further comprises a second anvil member comprising a first section positioned within the second cavity portion, a second section positioned within the third cavity portion, the second section comprising a fourth width which is greater than the second width, and a transition border, with the first section and the second section crossing over the transition border. The anvil additionally comprises a weld that connects the second section and the first anvil member together, the weld extending at least to the transition edge.
[0302] [0302] Example 11 - The surgical stapling anvil, according to Example 10, in which the second section extends outwards in relation to the first section.
[0303] [0303] Example 12 - The surgical stapling anvil, according to Examples 10 or 11, in which the second anvil member comprises a Y-shaped cross section.
[0304] [0304] Example 13 - The surgical stapling anvil, according to Examples 10, 11 or 12, where the weld comprises a weld depth between about 0.015 inch and about 0.040 inch.
[0305] [0305] Example 14 - The surgical stapling anvil, according to Examples 10, 11, 12 or 13, wherein the transition edge comprises a protruding surface at least substantially parallel to the surface facing the tissue.
[0306] [0306] Example 15 - The surgical stapling anvil, according to Example 14, in which the weld extends into the protruding surface.
[0307] [0307] Example 16 - The surgical stapling anvil, according to Examples 10, 11, 12, 13, 14 or 15, in which the weld comprises a laser weld.
[0308] [0308] Example 17 - A surgical stapling anvil comprising a first anvil member comprising a longitudinal slot configured to receive a firing member of a surgical instrument through it and a tissue-facing surface comprising a plurality of pockets formation of staples defined therein. The anvil additionally comprises a second anvil member and a weld that welds the first anvil member and the second anvil member together, the first anvil member and the second anvil member comprising first surfaces of fit at least substantially perpendicular to the surface facing the fabric, and second fitting surfaces positioned at an angle to the surface facing the fabric, the weld connecting at least the second fitting surfaces together.
[0309] [0309] Example 18 - The surgical stapling anvil, according to Example 17, in which the weld also connects at least a portion of the first joint surfaces together.
[0310] [0310] Example 19 - The surgical stapling anvil, according to Examples 17 or 18, in which the first anvil member and the second anvil member also comprise third interlocking surfaces at least substantially parallel to the surface - facing the fabric.
[0311] [0311] Example 20 - The surgical stapling anvil, according to Example 19, in which the second engaging surfaces and the third engaging surfaces are configured to assist in retaining the second anvil member in relation to the first member anvil for welding.
[0312] [0312] Example 21 - The surgical stapling anvil, according to Examples 19 or 20, in which the weld also welds at least a portion of the third joint surfaces together.
[0313] [0313] Example 22 - The surgical stapling anvil according to Examples 17, 18, 19 or 20 or 21, wherein the second engaging surfaces comprise an embedded depth that at least substantially corresponds to a predetermined weld depth of a welding equipment used to weld the second joint surfaces together.
[0314] [0314] Example 23 - The surgical stapling anvil according to Examples 17, 18, 19, 20, 21 or 22, where the weld comprises a weld depth between about 0.015 inch and about 0.040 inch .
[0315] [0315] Example 24 - A surgical stapling anvil comprising an anvil body comprising a surface facing the tissue, a plurality of staple forming pockets on the surface facing the tissue and a longitudinal slit.
[0316] [0316] Example 25 - The surgical stapling anvil according to Example 24, wherein the non-welded portion comprises a first non-welded portion configured to be received within the second portion of the longitudinal slot and a second non-welded portion comprising alignment surfaces configured to align the anvil cover with the anvil body for welding.
[0317] [0317] Example 26 - The surgical stapling anvil, according to Example 25, where the surface facing the tissue defines a foreground, and where the alignment surfaces define a background at least substantially parallel to the first plan.
[0318] [0318] Example 27 - The surgical stapling anvil, according to Examples 24, 25 or 26, in which the welded portion is extended in relation to the non-welded portion.
[0319] [0319] Example 28 - The surgical stapling anvil, according to Examples 24, 25, 26 or 27, in which the welded portion comprises angled welded surfaces that correspond to angular surfaces of the anvil body.
[0320] [0320] Example 29 - The surgical stapling anvil, according to Examples 24, 25, 26 or 27 or 28, in which the anvil cover comprises a Y-shaped cross section.
[0321] [0321] Example 30 - A surgical stapling anvil comprising an anvil body comprising a longitudinal slot that defines a geometric axis of the slot, the longitudinal slot comprising slit surfaces facing each other, and a surface facing the fabric. The fabric-facing surface comprises a first side and a second side defined by the longitudinal slot and a plurality of staple-forming pockets arranged in a plurality of longitudinal rows of staple-forming pockets, with the plurality of longitudinal rows of staple pockets comprise an innermost row of staple pockets closest to the longitudinal slit, the innermost row of staple pockets defining a geometric axis of the row along a first distance from the geometric axis of the slot and a first geometric axis from the outer contour along a second distance from the geometric axis of the slot which is greater than the first distance. The anvil additionally comprises an anvil cover welded to the anvil body. The anvil cover comprises a welded portion and a non-welded portion that comprises an outermost non-welded region that defines a second geometric axis of the external contour positioned at a third distance from the geometric axis of the slit, the third distance being is less than the second distance.
[0322] [0322] Example 31 - The surgical stapling anvil, according to Example 30, in which the third distance is greater than the first distance.
[0323] [0323] Example 32 - The surgical stapling anvil, according to Example 30, in which the third distance is less than the first distance.
[0324] [0324] Example 33 - The surgical stapling anvil, according to Examples 30, 31 or 32, in which the anvil cover additionally comprises alignment surfaces configured to align the anvil cover with the anvil body for welding.
[0325] [0325] Example 34 - The surgical stapling anvil, according to Example 33, where the surface facing the tissue defines a foreground, and where the alignment surfaces define a background at least substantially parallel to the first plan.
[0326] [0326] Example 35 - The surgical stapling anvil, according to Examples 30, 31, 32, 33 or 34, in which the welded portion is enlarged in relation to the non-welded portion.
[0327] [0327] Example 36 - The surgical stapling anvil according to Examples 30, 31, 32, 33, 34 or 35, wherein the welded portion comprises angled welded surfaces that correspond to angular surfaces of the anvil body.
[0328] [0328] Example 37 - The surgical stapling anvil according to Examples 30, 31, 32, 33, 34, 35 or 36, in which the anvil cover comprises a Y-shaped cross section.
[0329] [0329] Example 38 - An anvil for use with a surgical instrument, the anvil comprising a first anvil member comprising a surface facing the fabric that defines a reference plane and a plurality of training pockets of staples defined on the surface facing the fabric. The anvil further comprises a second anvil member welded to the first anvil member by at least one weld. The first anvil member and the second anvil member comprise a first fitting region that defines a foreground that is at least
[0330] [0330] Example 39 - The anvil, according to Example 38, in which the third fitting region comprises a length, and in which at least one weld comprises a penetration depth of the weld that is at least approximately equal to length.
[0331] [0331] Example 40 - The anvil, according to Example 39, in which the penetration depth of the weld is greater than the length.
[0332] [0332] Example 41 - The anvil, according to Examples 38, 39 or 40, wherein the first fitting region comprises alignment surfaces configured to align the first anvil member and the second anvil member for welding.
[0333] [0333] Example 42 - The anvil, according to Examples 38, 39, 40 or 41, in which the second anvil member comprises a Y-shaped cross section.
[0334] [0334] Example 43 - The anvil, according to Examples 38, 39, 40, 41 or 42, wherein the at least one weld comprises a laser weld.
[0335] [0335] Example 44 - A surgical stapling anvil comprising a first anvil body comprising a longitudinal slit configured to receive a firing member through it and a surface facing the fabric comprising a plurality of staple forming pockets defined therein. The anvil additionally comprises an anvil cover and a plurality of welds that weld the anvil cover and the anvil body together. The welds comprise a shallow welded zone comprising a first weld depth and a deep welded zone comprising a second weld depth which is different from the first weld depth, with the shallow welded zone and the deep welded zone being configured to increase the net weld depth of the plurality of welds.
[0336] [0336] Example 45 - The surgical stapling anvil, according to Example 44, in which the anvil lid and the anvil body comprise corresponding alignment features configured to assist in aligning the anvil body and lid anvil for welding.
[0337] [0337] Example 46 - The surgical stapling anvil, according to Example 45, in which the corresponding alignment features comprise a first alignment feature on a first side of the longitudinal slot positioned over a first distance of the surface facing the fabric, and a second alignment feature on a second side of the longitudinal slit, positioned along a second distance from the surface facing the fabric, and the first distance and the second distance being many different.
[0338] [0338] Example 47 - The surgical stapling anvil according to Examples 44, 45 or 46, in which the deep welded zone comprises a first longitudinal length, in which the shallow welded zone comprises a second longitudinal length, and the first longitudinal length and the second longitudinal length being different.
[0339] [0339] Example 48 - The surgical stapling anvil according to Examples 44, 45, 46 or 47, in which the deep welded zone comprises a first longitudinal length, in which the shallow welded zone comprises a second longitudinal length , and the first longitudinal length and the second longitudinal length overlap each other along a length of the surgical stapling anvil.
[0340] [0340] Example 49 - The surgical stapling anvil, according to Examples 44, 45, 46, 47 or 48, in which the deep welded zone comprises a region of access to the welding equipment.
[0341] [0341] Example 50 - The surgical stapling anvil, according to Example 49, in which the region of access to the welding equipment comprises a filler weld.
[0342] [0342] Example 51 - The surgical stapling anvil according to Examples 44, 45, 46, 47, 48, 49 or 50, in which the shallow welded zone comprises a first stiffness, in which the deep welded zone comprises a second rigidity, and the first rigidity and the second rigidity are different.
[0343] [0343] Example 52 - The surgical stapling anvil, according to Examples 44, 45, 46, 47, 48, 49, 50 or 51, in which the anvil body and the anvil cover are manufactured using a metal injection molding process.
[0344] [0344] Example 53 - A surgical stapling anvil comprising a first anvil member comprising a longitudinal slot configured to receive a firing member through it, a surface facing the fabric comprising a plurality of forming pockets of staples defined therein, and an upper anvil surface, the upper anvil surface comprising an opening that defines an edge of the first anvil member. The anvil further comprises a second anvil member and a weld configuration which welds the first anvil member and the second anvil member together. The weld configuration comprises a first weld that comprises a first weld depth that comprises a first weld root, the first weld depth being defined as the distance between the edge and the first weld root , and a second weld comprising a second weld depth comprising a second weld root, the second weld depth being defined as the distance between the edge and the second weld root, the second being Weld depth and first weld depth are different, and the first weld and second weld are configured to increase the net weld depth of the weld configuration.
[0345] [0345] Example 54 - The surgical stapling anvil, according to Example 53, in which the first anvil member and the second anvil member comprise corresponding alignment features configured to assist in aligning the first anvil member and the second anvil anvil member for welding.
[0346] [0346] Example 55 - The surgical stapling anvil, according to Example 54, in which the corresponding alignment features comprise a first alignment feature on a first side of the longitudinal slot positioned at a first distance from the surface facing the fabric, and a second alignment feature on a second side of the longitudinal slit positioned a second distance from the surface facing the fabric, and the first distance and the second distance are different.
[0347] [0347] Example 56 - The surgical stapling anvil, according to Examples 53, 54 or 55, in which the first weld comprises a first longitudinal length, in which the second weld comprises a second longitudinal length, and where the first longitudinal length and the second longitudinal length are different.
[0348] [0348] Example 57 - The surgical stapling anvil, according to Examples 53, 54, 55 or 56, in which the first weld comprises a first longitudinal length, in which the second weld comprises a second longitudinal length, and where the first longitudinal length and the second longitudinal length overlap each other along the length of the surgical stapling anvil.
[0349] [0349] Example 58 - The surgical stapling anvil, according to Examples 53, 54, 55, 56 or 57, which additionally comprises a filler weld positioned on the first weld.
[0350] [0350] Example 59 - The surgical stapling anvil according to Examples 53, 54, 55, 56, 57 or 58, which further comprises a first stiffness along the first weld and a second stiffness along the second weld, the first rigidity and the second rigidity being different.
[0351] [0351] Example 60 - The surgical stapling anvil, according to Examples 53, 54, 55, 56, 57, 58 or 59, in which the first anvil member and the second anvil member are manufactured using a metal injection molding process.
[0352] [0352] Example 61 - A surgical stapling anvil comprising an anvil body comprising a surface facing the fabric comprising a plurality of staple forming pockets and an interlock opening. The anvil additionally comprises an anvil lid, the anvil body and the anvil lid being welded together, and the anvil lid comprises an interlocking feature configured to be received within the opening of the anvil. interlocking.
[0353] [0353] Example 62 - The surgical stapling anvil, according to Example 61, in which the anvil body additionally comprises a longitudinal slot configured to receive a trigger member of a surgical instrument through it, being that the longitudinal slit defines a longitudinal geometric axis, and the anvil body and the anvil cover can only be mounted along the longitudinal axis.
[0354] [0354] Example 63 - The surgical stapling anvil, according to Examples 61 or 62, in which the anvil body and the anvil cover are manufactured using a metal injection molding process.
[0355] [0355] Example 64 - A surgical stapling set comprising a drive shaft that defines a geometric axis of the drive shaft, a first jaw comprising a staple cartridge channel, a staple cartridge comprising a plurality of stored staples removably in it, and an anvil configured to deform the clamps. The anvil comprises a surface facing the fabric, a plurality of staple-forming pockets defined on the surface facing the fabric and a longitudinal slit. The anvil additionally comprises a firing member comprising a body portion comprising a first lateral side and a second lateral side, a cutting member, a channel engaging portion configured to slide the first claw into sliding way. as the firing member moves through a staple firing stroke, and an anvil engagement portion configured to slide the anvil engaging as the firing member moves through a staple firing stroke, the anvil hitch portion comprises side portions extending from the body portion, the side portions defining a geometric axis of the anvil hitch portion that is positioned at an angle to the geometric axis of the drive shaft, the side portions comprise a longitudinal depth and a vertical thickness, and the longitudinal length and vertical thickness comprise a ratio and between about 2.5: 1 and about 20: 1.
[0356] [0356] Example 65 - The surgical stapling set, according to Example 64, where the ratio is between about 5: 1 and about 10: 1.
[0357] [0357] Example 66 - The surgical stapling set, according to Example 64, where the ratio is about 5: 1.
[0358] [0358] Example 67 - The surgical stapling set, according to Examples 64, 65 or 66, wherein each side portion and the body portion comprise a thread between them.
[0359] [0359] Example 68 - The surgical stapling set, according to Examples 64, 65, 66 or 67, in which the side portions comprise rounded outer ends.
[0360] [0360] Example 69 - The surgical stapling set, according to Examples 64, 65, 66, 67 or 68, wherein the engagement portion of the anvil comprises a flat top surface.
[0361] [0361] Example 70 - The surgical stapling set, according to Examples 64, 65, 66, 67, 68 or 69, wherein each side portion comprises a rounded front edge.
[0362] [0362] Example 71 - The surgical stapling set, according to Examples, 64, 65, 66, 67, 68, 69 or 70, in which the geometric axis of the anvil hitch portion is positioned at an angle about one degree with respect to the geometric axis of the drive axis.
[0363] [0363] Example 72 - A surgical stapling set comprising a drive shaft that defines a geometric axis of the drive shaft, a first jaw that comprises a staple cartridge channel, a staple cartridge that comprises a plurality of stored staples removably in it, and a second claw comprising an anvil, the anvil being configured to deform the clamps. The anvil comprises a fabric-facing surface, a plurality of staple-forming pockets defined on the fabric-facing surface and a longitudinal slit. The stapling assembly further comprises a firing member comprising a vertically extending body portion comprising two side sides, a first jaw hitch member configured to slide the first jaw slidingly as the firing member moves through a clamp firing course, and a second claw hitch member extending laterally on each side of the body portion, the second claw hitch member being oriented at an angle to the geometric axis of the drive shaft, the second claw engaging member being configured to slide the second claw slidingly as the firing member moves through the clamping firing stroke. The second claw hitch member comprises a vertical thickness and a lateral width defined as the distance between the body portion and an outer edge of the second claw hitch member, and the vertical thickness and the lateral width comprise a ratio between about 1: 2 and about 1: 1.
[0364] [0364] Example 73 - The surgical stapling set, according to Example 72, in which the ratio is about 1: 1.
[0365] [0365] Example 74 - The surgical stapling set, according to Examples 72 or 73, in which the second jaw entry member and the body portion comprise a thread between them.
[0366] [0366] Example 75 - The surgical stapling set, according to Examples 72, 73 or 74, in which the second claw hitch member comprises rounded outer ends.
[0367] [0367] Example 76 - The surgical stapling set, according to Examples 72, 73, 74 or 75, wherein the second claw hitch member comprises a flat top surface.
[0368] [0368] Example 77 - The surgical stapling set, according to Examples 72, 73, 74, 75 or 76, in which the second claw hitch member comprises rounded front edges.
[0369] [0369] Example 78 - The surgical stapling set, according to Examples 72, 73, 74, 75, 76 or 77, in which the second claw hitch member is oriented at an angle of about one degree with respect to to the geometric axis of the drive axis.
[0370] [0370] Example 79 - A surgical stapling set comprising a drive shaft which defines a geometric axis of the drive shaft, a first jaw comprising a staple cartridge channel, a staple cartridge comprising a plurality of stored staples removably in it, and a second claw comprising an anvil, the anvil being configured to deform the clamps. The anvil comprises a fabric-facing surface, a plurality of staple-forming pockets defined on the fabric-facing surface and a longitudinal slit. The stapling assembly further comprises a firing member comprising a body portion comprising a first side side and a second side side, a cutting member, a first claw coupling member configured to slidably engage the first claw as the firing member moves through a clamp firing stroke, and a second claw coupling member configured to slide the anvil engaging as the firing limb moves through a firing stroke of clamps, the second claw coupling member comprising side portions extending from the first side and the second side side and defining a flat top surface, the second claw coupling member is positioned at an angle to the geometric axis of the drive axis, with the side portions and side sides comprising fillets between them, and being that the side portions comprise rounded outer ends.
[0371] [0371] Example 80 - The surgical stapling set, according to Example 79, in which each side portion comprises a rounded front edge.
[0372] [0372] Example 81 - The surgical stapling set, according to Examples 79 or 80, in which the longitudinal slit comprises rounded slit edges that define a longitudinal slit opening, and the fillets are configured to engage sliding the rounded slit edges.
[0373] [0373] Example 82 - The surgical stapling set, according to Examples 79, 80 or 81, in which the longitudinal slit comprises rounded portions of the side slit, and in which the rounded outer ends are configured to engage securely - sliding edge the corresponding rounded slit portions.
[0374] [0374] Example 83 - The surgical stapling set, according to Examples 79, 80, 81 or 82, in which the second claw coupling member is positioned at an angle about one degree with respect to the axis geometric axis drive.
[0375] [0375] Example 84 - A surgical instrument set comprising a firing member comprising an anvil cam actuation portion comprising a first stiffness, a staple cartridge comprising a plurality of trusted staples - secured to be ejected from the staple cartridge by the firing member and an anvil. The anvil comprises a fabric-facing surface comprising a plurality of staple forming pockets configured to deform the staples, and an anvil protrusion configured to be engaged by the cam actuating portion of the firing member's anvil during a stroke. firing, the anvil protrusion comprising a second stiffness, and the second stiffness being substantially equal to the first stiffness, so that the deflection of the anvil protrusion would be substantially equal to the deflection of the cam actuating portion of the anvil.
[0376] [0376] Example 85 - Surgical instrument set, according to Example 84, which further comprises means for balancing the first stiffness and the second stiffness.
[0377] [0377] Example 86 - The surgical instrument set, according to Example 85, in which the medium comprises an adjustment for at least one of the first geometry of the acting portion of the anvil cam and a second protrusion geometry anvil to provide substantially similar stiffness.
[0378] [0378] Example 87 - The surgical instrument set, according to Examples 85 or 86, in which the means additionally comprise adjusting at least one of the first height of the acting portion of the anvil cam and a second height of the bulge protrusion to provide substantially similar stiffness.
[0379] [0379] Example 88 - The surgical instrument set, according to Examples 85, 86 or 87, in which the medium comprises substantially equalizing the elastic limits of the acting portion of the anvil cam and the anvil protrusion.
[0380] [0380] Example 89 - The surgical instrument set, according to Examples 85, 86, 87 or 88, in which the medium comprises substantially equalizing the hardness of the acting portion of the anvil cam and the anvil protrusion.
[0381] [0381] 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 manner. In several examples, the surgical instrument systems described herein can be induced, for example, by a manually operated trigger. In certain cases, the motors disclosed 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 No. 13 / 118,241, entitled
[0382] [0382] The surgical instrument systems described here have been described in connection with the implantation and deformation of the clamps; however, the embodiments described in the present invention are not | 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.
[0383] [0383] 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- PLING INSTRUMENT HAVING SEPARATE DISTINCT CLOSING AND
[0384] [0384] Although several devices have been described here in connection with certain modalities, modifications and variations of these modalities can be implemented. The specific resources, structures or characteristics can be combined in any suitable way in one or more modalities. Therefore, the features, structures or specific features illustrated or described in connection with a modality can be combined, in whole or in part, with the resources, structures or features of one or more other modalities, without limitation. In addition, where materials are revealed for certain components, other materials can be used. In addition, according to several 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 aforementioned description and the following claims are intended to cover all such modifications and variations.
[0385] [0385] The devices disclosed herein can be designed to be discarded after a single use, or 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 can include any combination of 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 dismantle 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.
[0386] [0386] The devices disclosed 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 at 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.
[0387] [0387] 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.
[0388] [0388] Any patent, publication or other description material, in whole or in part, that is said to be incorporated into the present invention for reference purposes, is incorporated into the present invention only to the extent that the incorporated materials do not conflict with existing definitions, statements or other description material presented in this description.
Thus, and as necessary, the description as explicitly presented herein replaces any conflicting material incorporated into the present invention as a reference.
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 embedded material and the existing description material.

权利要求:
Claims (20)
[1]
1. Surgical stapling anvil, characterized by comprising: an anvil body comprising: a surface facing the tissue; a plurality of staple forming pockets defined on said fabric-facing surface; and a longitudinal slot, comprising: a first portion comprising a first width, wherein said first portion is configured to receive a cutting edge from a firing member therethrough; and a second portion comprising a second width greater than said first width, wherein said second portion is configured to receive an anvil portion of the firing member therethrough; and an anvil lid welded to said anvil body, wherein said anvil lid comprises: a welded portion; and a non-welded portion, wherein said non-welded portion comprises a non-welded width, and wherein said non-welded width is less than or equal to about 105% of said second width.
[2]
2. Surgical stapling anvil, according to claim 1, characterized in that said non-welded portion comprises: a first non-welded portion configured to be received within said second portion of said longitudinal slot; and a second non-welded portion comprising alignment surfaces configured to align said anvil cover with said anvil body for welding.
[3]
3. Surgical stapling anvil, according to claim 2, characterized in that said surface facing the tissue defines a first plane, and in which said alignment surfaces define a second plane at least substantially parallel to said first plane .
[4]
4. Surgical stapling anvil, according to claim 1, characterized in that said welded portion is enlarged in relation to said non-welded portion.
[5]
5. Surgical stapling anvil, according to claim 4, characterized in that said welded portion comprises angled welded surfaces corresponding to angular surfaces of said anvil body.
[6]
6. Surgical stapling anvil, according to claim 1, characterized in that said anvil cover comprises a Y-shaped cross section.
[7]
7. Surgical stapling anvil, characterized by comprising: an anvil body comprising: a longitudinal slit that defines a geometric slit axis, wherein said longitudinal slit comprises slit surfaces facing each other; and a fabric-facing surface comprising: a first side and a second side defined by said longitudinal slot; a plurality of staple-forming pockets arranged in a plurality of longitudinal rows of staple-forming pockets, wherein said plurality of longitudinal rows of staple-forming pockets comprises an innermost row of more staple-forming pockets close to said longitudinal slot, wherein said innermost row of staple forming pockets defines a row geometric axis at a first distance from said slot geometric axis and a first outer contour geometric axis at a second distance from the said slit geometric axis that is greater than said first distance; and an anvil lid welded to said anvil body, wherein said anvil lid comprises: a welded portion; and a non-welded portion comprising an outer, non-welded region that defines a second external contour geometry axis positioned at a third distance from said slit geometry axis, in which said third distance is less than said if - second distance.
[8]
8. Surgical stapling anvil, according to claim 7, characterized in that said third distance is greater than said first distance.
[9]
9. Surgical stapling anvil, according to claim 7, characterized in that said third distance is less than said first distance.
[10]
10. Surgical stapling anvil according to claim 7, characterized in that said anvil cover further comprises alignment surfaces configured to align said anvil cover with said anvil body for welding.
[11]
11. Surgical stapling anvil according to claim 10, characterized in that said surface facing the fabric defines a foreground, and wherein said alignment surfaces define a background at least substantially parallel to said foreground.
[12]
Surgical stapling anvil according to claim 7, characterized in that said welded portion is enlarged in relation to said non-welded portion.
[13]
13. Surgical stapling anvil according to claim 12, characterized in that said welded portion comprises angled welded surfaces corresponding to angular surfaces of said anvil body.
[14]
14. Surgical stapling anvil according to claim 7, characterized in that said anvil cover comprises a Y-shaped cross section.
[15]
15. Anvil for use with a surgical stapling instrument, characterized by comprising: a first anvil member, comprising: a surface facing the tissue that defines a reference plane; and a plurality of staple forming pockets defined on said fabric-facing surface; and a second anvil member welded to said first anvil member by at least one weld, wherein said first anvil member and said second anvil member comprise: a first fitting region that defines a first plane that is at least substantially parallel to said reference plane; a second locking region that defines a second plane that is at least substantially perpendicular to said reference plane; and a third socket region that defines a third plane that is positioned at an angle to said reference plane, wherein said first anvil member and said second anvil member are welded by said at least one weld on said third fitting region.
[16]
Anvil according to claim 15, characterized in that said third engaging region comprises a length, and wherein said at least one weld comprises a depth of penetration of the weld that is at least approximately equal to said length.
[17]
Anvil according to claim 16, characterized in that said penetration depth of the weld is greater than said length.
[18]
Anvil according to claim 15, characterized in that said first fitting region comprises alignment surfaces configured to align said first anvil member and said second anvil member for welding.
[19]
19. Anvil according to claim 15, characterized in that said second anvil member comprises a Y-shaped cross section.
[20]
Anvil according to claim 15, characterized in that said at least one weld comprises a laser weld.

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同族专利:

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公开号 | 公开日

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US20210236124A1|2021-08-05|

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US20180368841A1|2018-12-27|

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EP3420960A1|2019-01-02|

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CN110868940A|2020-03-06|

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US10993716B2|2021-05-04|

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JP2020525131A|2020-08-27|

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WO2019003036A1|2019-01-03|

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US11051809B2|2018-12-31|2021-07-06|Cilag Gmbh International|Cartridge receiving jaw for surgical stapler and associated method of manufacture with MIM|

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US11147553B2|2019-03-25|2021-10-19|Cilag Gmbh International|Firing drive arrangements for surgical systems|

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US11147551B2|2019-03-25|2021-10-19|Cilag Gmbh International|Firing drive arrangements for surgical systems|

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US11172929B2|2019-03-25|2021-11-16|Cilag Gmbh International|Articulation drive arrangements for surgical systems|

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US11253254B2|2019-04-30|2022-02-22|Cilag Gmbh International|Shaft rotation actuator on a surgical instrument|

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US11246678B2|2019-06-28|2022-02-15|Cilag Gmbh International|Surgical stapling system having a frangible RFID tag|

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US11219455B2|2019-06-28|2022-01-11|Cilag Gmbh International|Surgical instrument including a lockout key|

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US11241235B2|2019-06-28|2022-02-08|Cilag Gmbh International|Method of using multiple RFID chips with a surgical assembly|

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US11224497B2|2019-06-28|2022-01-18|Cilag Gmbh International|Surgical systems with multiple RFID tags|

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US11259803B2|2019-06-28|2022-03-01|Cilag Gmbh International|Surgical stapling system having an information encryption protocol|

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US11051807B2|2019-06-28|2021-07-06|Cilag Gmbh International|Packaging assembly including a particulate trap|

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US11234698B2|2019-12-19|2022-02-01|Cilag Gmbh International|Stapling system comprising a clamp lockout and a firing lockout|

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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US15/634,046|US10993716B2|2017-06-27|2017-06-27|Surgical anvil arrangements|

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US15/634,046|2017-06-27|

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PCT/IB2018/054402|WO2019003036A1|2017-06-27|2018-06-14|Surgical anvil arrangements|

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