atraumatic features of stapling head for circular surgical stapler

专利摘要:
The present invention relates to an apparatus including a body, a drive shaft assembly, a staple head assembly and an anvil. The staple head assembly includes an annular platform member, a plurality of staples, and a driver. The platform member includes a platform surface that has a curved profile defined by a curve extending from the inside diameter of the platform member to the outside diameter of the platform member. the platform member further includes an outer staple die array and an inner staple die array. The actuator is operable to drive the clamps through the clamp openings. The anvil is operable to compress the fabric against the first platform surface.
公开号:BR112019009661A2
申请号:R112019009661
申请日:2017-05-31
公开日:2019-09-10
发明作者:C Miller Christopher；E Shelton Frederick Iv
申请人:Ethicon Llc；
IPC主号:

专利说明:

Descriptive Report of the Invention Patent for ATRAUMATIC RESOURCES OF STAPLING HEAD FOR CIRCULAR SURGICAL STAPLER.
BACKGROUND [0001] In some surgical procedures (for example, colorectal, bariatric, thoracic, etc.), portions of a patient's digestive tract (for example, the gastrointestinal tract and / or esophagus, etc.) can be cut and removed to eliminate unwanted tissue or for other reasons. After the tissue is removed, the remaining portions of the digestive tract can be coupled in an end-to-end anastomosis. End-to-end anastomosis can provide a substantially unobstructed flow path from one portion of the digestive tract to the other portion of the digestive tract, without also providing any type of leak at the anastomosis site.
[0002] An example of an instrument that can be used to provide an end-to-end anastomosis is a circular stapler. Some of these staplers work to hold layers of fabric together, cut through the layers of fabric stuck and have the clips go through the fabric layers to substantially seal the fabric layers together near the separate ends of the fabric layers, joining thus, two separate ends of an anatomical lumen together. The circular stapler can be configured to cut the fabric and seal the fabric substantially simultaneously. For example, the circular stapler can separate excess tissue, which is inside an annular matrix of staples in an anastomosis, to provide a substantially smooth transition between the sections of anatomical lumen that are joined in the anastomosis. Circular staplers can be used in open procedures or in endoscopic procedures. In some cases, a portion of the circular stapler is inserted through the
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2/71 orifice that occurs naturally in a patient.
[0003] Examples of circular staplers are described in US Patent No. 5,205,459, entitled Surgical Anastomoseis Stapling Instrument, issued April 27, 1993; US Patent No. 5,271,544, entitled Surgical Anastomosis Stapling Instrument, issued December 21, 1993; US Patent No. 5,275,322, entitled Surgical Anastomosis Stapling Instrument, issued on January 4, 1994; US Patent No. 5,285,945, entitled Surgical Anastomosis Stapling Instrument, issued February 15, 1994; US Patent No. 5,292,053, entitled Surgical Anastomosis Stapling Instrument, issued March 8, 1994; US Patent No. 5,333,773, entitled Surgical Anastomosis Stapling Instrument, issued August 2, 1994; US Patent No. 5,350,104, entitled Surgical Anastomosis Stapling Instrument, issued September 27, 1994; US Patent No. 5,533,661, entitled Surgical Anastomosis Stapling Instrument, issued July 9, 1996; and in US Patent No. 8,910,847, entitled Low Cost Anvil Assembly for Circular Stapler, published on December 16, 2014. The description of each of the aforementioned US patents is incorporated by reference in the present invention.
[0004] Some circular staplers may include a motorized drive mechanism. Examples of circular staplers with motorized drive mechanisms are described in the US patent publication. 2015/0083772, entitled Surgical Stapler with Rotary Cam Drive and Return, published on March 26, 2015; US publication No. 2015/0083773, entitled Surgical Stapling Instrument with Drive Assembly Having Toggle Features, published on March 26, 2015; US publication No. 2015/0083774, entitled Control Features for Motorized Surgical Stapling Instrument, published on March 26, 2015; and in US publication No. 2015/0083775,
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3/71 entitled Surgical Stapler with Rotary Cam Drive, published March 26, 2015. The disclosure of each of the aforementioned US patent publications is incorporated by reference into the present invention.
[0005] Although various types of surgical stapling instruments and associated components have been produced and used, it is believed that no one before the inventor (s) has produced or used the invention described in the attached claims.
BRIEF DESCRIPTION OF THE DRAWINGS [0006] Although the specification concludes with claims that specifically indicate and distinctly claim this technology, it is believed that this technology will be better understood from the following description of certain examples, taken in conjunction with the accompanying drawings , in which like reference numbers identify like elements, and in which:
[0007] Figure 1 represents a perspective view of an exemplary circular stapler;
[0008] Figure 2 represents a perspective view of the circular stapler of Figure 1, with a battery removed from a cable assembly and an anvil removed from a stapling head assembly;
[0009] Figure 3 represents a perspective view of the anvil of the circular stapler in Figure 1;
[0010] Figure 4 represents a perspective view of the stapling head assembly of the circular stapler of Figure 1;
[0011] Figure 5 represents an exploded perspective view of the stapling head assembly of Figure 4;
[0012] Figure 6 represents an exploded perspective view of the circular stapler of Figure 1, with portions of the drive shaft assembly shown separately from each other;
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4/71 [0013] Figure 7A represents a side view in cross section of the anvil of Figure 3 positioned within a first section of a digestive tract and the staple head assembly of Figure 4 positioned in a second section of the digestive tract, with the anvil separated from the stapling head assembly;
[0014] Figure 7B represents a cross-sectional side view of the anvil of Figure 3 positioned within the first section of the digestive tract and the stapling head set of Figure 4 positioned in the second section of the digestive tract, with the anvil attached to the set the stapling head;
[0015] Figure 7C represents a side view in cross section of the anvil of Figure 3 positioned within the first section of the digestive tract and the stapling head assembly of Figure 4 positioned in the second section of the digestive tract, with the anvil retracted towards to the stapling head assembly so as to secure the fabric between the anvil and the stapling head assembly;
[0016] Figure 7D represents a cross-sectional side view of the anvil of Figure 3 positioned within the first section of the digestive tract and the stapling head set of Figure 4 positioned in the second section of the digestive tract, with the head set of stapling actuated to cut and staple the attached fabric;
[0017] Figure 7E represents a cross-sectional side view of the first and second sections of the digestive tract of Figure 7A joined together in an end-to-end anastomosis;
[0018] Figure 8 represents a partial perspective view of the stapling head assembly and the driving shaft assembly of the circular stapler of Figure 1 inserted in the colon of a
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5/71 patient, with the stapling head set positioned close to the patient's sacrum, and with the patient's anatomy shown in cross section;
[0019] Figure 9 represents a partial perspective view of the stapling head assembly and the driving shaft assembly of the circular stapler of Figure 1 inserted into a patient's colon, with the stapling head assembly engaging a fold of tissue the colon, and with the patient's anatomy shown in cross section;
[0020] Figure 10 represents a perspective view of an exemplary alternative stapling head assembly that can be incorporated into the circular stapler of Figure 1;
[0021] Figure 11 represents a top plan view of a platform member of the stapling head of Figure 10;
[0022] Figure 12 represents a partial cross-sectional view of another exemplary alternative stapling head assembly that can be incorporated into the circular stapler of Figure 1;
[0023] Figure 13 represents a partial perspective view of another exemplary alternative stapling head assembly that can be incorporated into the circular stapler of Figure 1;
[0024] Figure 14 represents a partial cross-sectional view of the stapling head assembly of Figure 13, taken along line 14-14 of Figure 13;
[0025] Figure 15 represents a partial cross-sectional view of the stapling head assembly of Figure 13, taken along line 15-15 of Figure 13;
[0026] Figure 16 represents a partial cross-sectional view of another alternative stapling head assembly
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6/71 example that can be incorporated into the circular stapling of Figure 1;
[0027] Figure 17 represents a perspective view of another alternative example platform member that can be incorporated into the staple head assembly of Figure 4;
[0028] Figure 18 represents a perspective view of another exemplary alternative platform member that can be incorporated into the staple head assembly of Figure 4;
[0029] Figure 19 represents a top plan view of another exemplary alternative stapling head assembly that can be incorporated into the circular stapler of Figure 1;
[0030] Figure 20 represents a partial perspective view of the stapling head assembly of Figure 19;
[0031] Figure 21 represents a partial cross-sectional view of an example anvil compressing the tissue against the stapling head assembly of Figure 19;
[0032] Figure 22 represents a partial cross-sectional view of an exemplary alternative anvil compressing the tissue against an exemplary alternative stapling head assembly that can be incorporated into the circular stapler of Figure 1;
[0033] Figure 23 represents a cross-sectional view of the fabric of Figure 22 after the stapling head assembly of Figure 22 has been activated and removed with the anvil of Figure 22, leaving the fabric behind in a cut and stapled state;
[0034] Figure 24 represents a partial perspective view of another exemplary alternative stapling head assembly that can be incorporated into the circular stapler of Figure 1;
[0035] Figure 25 is a perspective view in partial cross section of the staple cartridge assembly of Figure 24;
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7/71 [0036] Figure 26 represents a partial cross-sectional view of an example anvil compressing the fabric against the stapling head assembly of Figure 24;
[0037] Figure 27 represents a partial perspective view of another exemplary alternative stapling head assembly that can be incorporated into the circular stapler of Figure 1;
[0038] Figure 28 is a partial cross-sectional perspective view of the staple cartridge assembly of Figure 27; and [0039] Figure 29 represents a partial perspective view of another exemplary alternative stapling head assembly that can be incorporated into the circular stapler of Figure
1.
[0040] The drawings are not intended to be limiting in any way and it is contemplated that various modalities of technology can be executed in a variety of other ways, including those not necessarily represented in the drawings. The drawings incorporated in the annex and forming part of the specification illustrate various aspects of the present technology and, together with the description, serve to explain the principles of the technology; it is understood, however, that this technology is not limited to precisely the provisions shown.
DETAILED DESCRIPTION [0041] The following description of certain examples of the technology should not be used to limit its scope. Other examples, resources, aspects, modalities and advantages of the technology will become evident to those versed in the technique from the following description, which is given by way of illustration, one of the best ways contemplated to execute the technology. As will be understood, the technology described here is capable of other different and obvious aspects, all without disregarding the
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8/71 technology. Consequently, drawings and descriptions should be considered as illustrative and not restrictive in nature.
L Overview of the exemplary circular stapling surgical instrument [0042] Figures 1 to 2 depict an exemplary surgical circular stapling instrument 10 that can be used to provide an end-to-end anastemesis between two sections of an anatomical lumen, with one section dc treat a patient's digestive. The instrument 10 in this example comprises a cable assembly 100, a drive shaft assembly 200, a stapling head assembly 300, an anvil 400 and a removable battery 120. Each of these components will be described in more detail below. In addition to or replacing the aforementioned, it should be understood that instrument 10 can still be constructed and operable in accordance with at least some of the teachings of US patent application No. 14 / 751,612, entitled Method of Applying an Annular Array of Staples to Tissue, deposited on June 26, 2015; US patent No. 5,205,459; US patent No. 5,271,544; US patent No. 5,275,322; US patent No. 5,285,945; US patent No. 5,292,053; US patent No. 5,333,773; US patent No. 5,350,104; US patent No. 5,533,661; and / or US Patent No. 8,910,847, the disclosures of which are hereby incorporated by reference. Still other suitable configurations will be evident to one skilled in the art in view of the teachings described herein.
A. Exemplary fabric engagement features of the circular stapling instrument [0043] As best seen in Figure 3, the anvil 400 of the present example comprises a head 410 and a stem 420. The head 410 includes a proximal surface 412 that defines a plurality of staple forming pockets 414. The staple forming pockets 414 are arranged in two concentric annular arrays
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9/71 cas in the present example. The staple forming pockets 414 are configured to deform the staples as the staples are pushed into the staple forming pockets 414 (for example, deforming a staple that has a generic U shape to a B shape, as it is known in technique). The stem 420 defines a hole or lumen 422 and includes a pair of pivoting lock members 430 positioned in the hole 422. Each lock member 430 includes features that allow the anvil 400 to be removably attached to a trocar 330 of the head assembly staple 300, as will be described in more detail below. It should be understood, however, that the anvil 400 can be removably attached to a trocar 330 using any other suitable components, resources or techniques.
[0044] The stapling head assembly 300 is located at the distal end of the drive shaft assembly 200. As shown in Figures 1 to 2, the anvil 400 is configured to be removably coupled to the drive shaft assembly 200, adjacent to stapling head assembly 300. As will be described in more detail below, anvil 400 and stapling head assembly 300 are configured to cooperate with tissue manipulation in three ways, including tissue tightening, cutting the fabric and stapling the fabric. As can best be seen in Figures 4 to 5, the stapling head assembly 300 comprises a tubular housing 310 which houses a sliding clip driver member 350. A cylindrical inner core member 312 extends distally within the tubular housing 310. O tubular housing 310 is fixedly attached to an outer sheath 210 of the drive shaft assembly 200, so that tubular housing 310 serves as a mechanical support for the staple head assembly 300.
[0045] The trocar 330 is positioned coaxially within the
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10/71 inner core member 312 of the tubular casing 310. The trocar 330 is operable to move distally and proximally to the tubular casing 310 in response to the rotation of a button 130 located at the proximal end of the cable assembly 100. The trocar 330 comprises a drive shaft 332 and a head 334. Head 334 includes a pointed tip 336 and a proximal surface extending inward 338. Head 334 and the distal portion of drive shaft 332 are configured for insertion into the bore 422 of the anvil 420. The proximal surface 338 is configured to complement the features of the locking members 430 to provide a pressure fit between the anvil 400 and the trocar 330.
[0046] The clip driver member 350 is operable to act longitudinally within the tubular housing 310 in response to the activation of the motor 160 as will be described in more detail below. Staple trigger member 350 includes two concentric annular arrays presented distally from staple actuators 352. Staple actuators 352 are arranged to match the arrangement of staple forming pockets 414 described above. Thus, each staple driver 352 is configured to drive a corresponding staple into a corresponding staple forming pocket 414 when the staple head assembly 300 is operated. The clip driver member 350 also defines a bore 354 that is configured to receive coaxially a core member 312 of tubular casing 310.
[0047] A cylindrical knife member 340 is positioned coaxially within the clip trigger member 350. The knife member 340 includes a sharp circular cutting edge, presented distally 342. The knife member 340 is dimensioned in such a way that the member 340 sets an external diameter that is less than the diameter defined by the internal annular matrix of the actuators
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11/71 clamps 352. The knife member 340 also defines an opening that is configured to receive coaxially a core member 312 of tubular casing 310.
[0048] A platform member 320 is fixedly attached to the tubular housing 310. The platform member 320 includes a distally presented platform surface 322 that defines two concentric annular arrays of staple openings 324. The staple openings 324 are arranged to match available to the clip actuators 352 and the clip-forming pockets 414 described above. In this way, each staple opening 324 is configured to provide a path for a corresponding staple trigger 352 to drive a corresponding staple through the platform member 320 and into a corresponding staple forming pocket 414 when the staple head assembly 300 is triggered. It should be understood that the arrangement of the staple openings 322 can be modified exactly like the arrangement of staple forming pockets 414 as described above. It is also to be understood that various structures and techniques can be used to contain the clamps within the staple head assembly 300 before the staple head assembly 300 is driven. The platform member 320 defines an internal diameter that is only slightly larger than the outside diameter defined by the knife member 340. The platform member 320 is thus configured to allow the knife member 340 to move distally to a point where the cutting edge 342 is distal to the platform surface 322.
[0049] Figure 6 shows various components of the drive shaft assembly 200, which extends distally from the cable assembly 100 and couples the components of the staple head assembly 300 to the components of the cable assembly 100. In particular, and how mentioned above, the drive shaft assembly 200 includes a sheath
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12/71 outer 210 extending between the cable assembly 100 and the tubular casing 310. In the present example, the outer sheath 210 is rigid and includes a preformed curved section 212 that is configured to facilitate the positioning of the head assembly stapling 300 in a patient's colon, as described below. The curved section 212 includes an inner curve 216 and an outer curve 214.
[0050] The drive shaft assembly 200 additionally includes a trocar actuation rod 220 and a trocar actuation band assembly 230. The proximal end of the trocar actuation band assembly 230 is fixedly attached to the proximal end of the shaft trocar 332. The proximal end of the trocar 230 drive band assembly is fixedly attached to the distal end of the trocar trigger rod 220, so that the trocar 330 will move longitudinally with respect to the outer sheath 210 in response to the translation of the trocar actuation band 230 and the trocar actuation rod 220 in relation to the outer sheath 210. The trocar actuation band 230 is configured to flex so that the actuation band assembly of the trocar 230 can follow along the pre-formed curve in the drive shaft assembly 200 according to the drive belt assembly of trocar 230 is longitudinally transferred in relation to the outer sheath 210. However, the set of trigger band 230 has sufficient column strength and tensile strength to transfer the distal and proximal forces of the acting rod of the trocar 220 to the axis trocar 332 drive shaft. The trocar 220 drive shaft is rigid. A clamp 222 is fixedly attached to the trocar drive rod 220 and is configured to cooperate with the complementary characteristics within the cable assembly 100 to prevent the trocar drive rod 220
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13/71 rotate within the cable assembly 100 while still allowing the trocar drive rod 220 to translate longitudinally into the cable assembly 100. The trocar shaft drive 220 further includes a thick helical thread 224 and a fine helical thread 226.
[0051] The drive shaft assembly 200 additionally includes a staple head assembly 240 which is slidably received within the outer sheath 210. The distal end of the staple head assembly 240 is fixedly attached to the proximal end of the staple trigger member 350. The proximal end of the staple head assembly trigger 240 is attached to a drive bracket 250 via a pin 242. It is therefore to be understood that the staple trigger member 350 is longitudinally moved in relation to to the outer sheath 210 in response to translation of the staple head assembly 240 and the drive bracket 250 relative to the outer sheath 210. Staple head assembly 240 is configured to flex so that the staple head assembly 240 can follow along the preformed curve in the drive shaft assembly 200 confor m and the staple head assembly 240 is translated longitudinally in relation to the outer sheath 210. However, the staple head assembly 240 has a column resistance sufficient to transfer distal forces from the drive bracket 250 to the driving member clamp 350.
B · Exemplary user input features of the circular stapling instrument [0052] As shown in Figure 1, the cable assembly 100 includes a pistol grip 112 and various components that are operable to act on the anvil 400 and the head assembly. clip
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14/71 ment 300. In particular, the cable assembly 100 includes a button 130, a safety trigger 140, a trigger trigger 150, a motor 160 and a motor drive module 180. Button 130 is coupled to the rod actuation of the trocar 220 by means of a nut (not shown), so (that the coarse helical thread 224 will selectively engage a thread engaging feature inside the nut; and in such a way that the fine helical thread 226 will will selectively engage a threaded engagement feature (not shown) inside the button 130. These complementary structures are configured so that the trocar stem 220 will first move proximally at a relatively slow rate, then move proximally at a relatively rapid rate in response to the rotation of knob 130.
[0053] It should be understood that when the anvil 400 is coupled to the trocar 330, the rotation of the button 130 will provide the corresponding translation of the anvil in relation to the staple head assembly 300. It should also be understood that the button 130 can be rotated in a first angled direction (for example, clockwise) to retract anvil 400 towards the staple head assembly 300; and in a second angled direction (for example, counterclockwise) to advance the anvil 400 in the opposite direction of the staple head assembly 300. The knob 130 can therefore be used to adjust the gap between the opposing surfaces 412 322 of the anvil 400 and the stapling head assembly 300 until a suitable span d has been obtained.
[0054] In the present example, the cable assembly 100 comprises a feedback feature for user 114 that is configured to provide the operator with visual feedback indicating the positioning of the anvil 400 in relation to the stapling assembly 300. The operator can then , observe the feedback feature
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15/71 for user 114 while turning knob 130 to confirm that the proper gap between the anvil 400 and the stapling set 300 has been reached. As an example only, the feedback feature for user 114 can be configured and operable according to at least some of the teachings in US patent application No. 14 / 751,612, entitled Method of Applying an Annular Array of Staples to Tissue, filed on June 26, 2015, the disclosure of which is hereby incorporated by reference. Other suitable ways of providing feedback to the user will be evident to those skilled in the art in view of the teachings in this document.
[0055] The trigger trigger 150 is operable to drive the motor 160 to thereby trigger the staple head assembly 300. The safety trigger 140 is operable to selectively block the trigger trigger 150 based on the longitudinal position of the anvil 400 in relation to the staple head assembly 300. The cable assembly 100 also includes components that are operable to selectively lock both triggers 140, 150 based on the position of the anvil 400 in relation to the staple head assembly 300. When triggers 140, 150 are blocked, trigger trigger 150 is prevented from starting actuation of the staple head assembly 300. In this way, the trigger 150 is operable only to initiate the activation of the staple head assembly 300 when the anvil position 400 in relation to the stapling head assembly 300 is within a predefined range.
[0056] In the present example, the trigger trigger 150 of the present example includes an integral actuating paddle, such as the paddle shown and described in US patent application No. 14 / 751,231, entitled Ultrasonic Surgical Instrument With Staged Clamping, filed on 26 June 2015, the disclosure of which is hereby incorporated by way of reference
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16/71 co. The paddle is configured to activate a motor activation module switch 180 (Figure 1) when the trigger trigger 150 is turned to a triggered position. The motor drive module 180 is in communication with the battery 120 and the motor 160, so that the motor drive module 180 is configured to supply the motor 160 with electrical power from the battery 120 in response to the blade that drives the motor drive module key 180. In this way, the motor 160 will be activated when the trigger trigger 150 is turned. This drive of the motor 160 will act the stapling head assembly 300, as described in more detail below.
[0057] Battery 120 is intended to supply electrical power to a motor 160, as noted above. The battery 120 can be removably attached to the cable assembly 100 via a snap fit or in any other suitable manner. It should be understood that battery 120 and cable assembly 100 may have electrical contacts, pins and complementary sockets and / or other features that provide paths for electrical communication of battery 120 with electrically powered components in cable assembly 100 when battery 120 it is coupled to the cable assembly 100. It should also be understood that, in some versions, the battery 120 is incorporated unitarily within the cable assembly 100, so that it cannot be removed from the cable assembly 100.
C · Exemplary anastomosis procedure with circular stapling instrument [0058] Figures 7A to 7E show the instrument 10 being used to form an anastomosis 70 between two tubular anatomical structures 20, 40. Just as an example, the tubular anatomical structures 20 , 40 may comprise sections of a patient's esophagus, sections of a patient's colon, other sections of the patient's digestive system
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17/71 patient or any other anatomical tubular structures. In some versions, one or more diseased portions of a patient's colon are removed, with the anatomical tubular structures 20, 40 of Figures 7A to 7E representing the remaining separate portions of the colon. [0059] As shown in Figure 7A, the anvil 400 is positioned in a tubular anatomical structure 20 and the staple head assembly 300 is positioned in the other tubular anatomical structure 40. In versions in which the tubular anatomical structures 20, 40 comprise the colon sections of a patient, the stapling head assembly 300 can be inserted through the patient's rectum. It should also be understood that the procedure depicted in Figures 7A to 7E is an open surgical procedure, although the procedure can instead be performed by laparoscopy. Just as an example, such a surgical procedure can be provided in accordance with at least some of the teachings of US publication No. 2016/0100837, entitled Staple Cartridge, published on April 14, 2016, the disclosure of which is incorporated herein by reference ; and / or US patent application No. 14 / 864,310, entitled Apparatus and Method for Reprocessing a Medical Device, filed on September 24, 2015, the disclosure of which is hereby incorporated by reference. The various suitable ways in which the instrument 10 can be used to form an anastomosis 70 in a laparoscopic procedure will be evident to those skilled in the art in view of the teachings presented here.
[0060] As shown in Figure 7A, the anvil 400 is positioned on the anatomical tubular structure 20 so that the stem 420 protrudes from the open cut end 22 of the anatomical tubular structure 20. A pouch suture 30 is provided over a region mean of the stem 420 to generally hold the anvil position 400 in the anatomical tubular structure 20. Likewise, the joint
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18/71 to the stapling head 300 is positioned on the anatomical tubular structure 40 so that the trocar 330 protrudes from the open cut end 42 of the anatomical tubular structure 20. A pouch suture 50 is provided over a mid-axis region drive 332 to generally secure the position of the stapling head assembly 300 to the anatomical tubular structure 40.
[0061] Then, the anvil 400 is attached to the trocar 330 by inserting the trocar 330 into hole 422, as shown in Figure 7B. Locking members 430 engage the trocar 334 head 330, thereby providing a secure fit between the anvil 400 and the trocar 330. The operator then turns the knob 130 while holding the cable assembly 100 stationary through the pistol grip 112. This rotation of knob 130 causes trocar 330 and anvil 400 to retract proximally, as described above. As shown in Figure 7C, this proximal retraction of the trocar 330 and the anvil 400 compresses the tissue of the anatomical tubular structures 20, 40 between the surfaces 412, 322 of the anvil 400 and the staple head assembly 300. The operator observes the feedback to user 114 to determine whether the gap distance d between the opposing surfaces 412, 322 of the anvil 400 and the stapling head assembly 300 is adequate; and make any necessary adjustments using button 130.
[0062] Once the operator has properly adjusted the span distance d using button 130, the operator pulls the safety trigger 140 to allow the trigger trigger 150 to be triggered. The operator then pulls the trigger trigger 150. This actuation of the trigger trigger 150 in turn activates a motor activation module key 180, which in turn activates the motor 160 to actuate the stapling head assembly 300 by activating the knife member 340 and the clip trigger member
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19/71
350 distally as shown in Figure 7D. As knife member 340 travels distally, cutting edge 342 of knife member 340 cooperates with inner edge 416 of anvil 400, thus shearing excess tissue that is positioned within annular recess 418 of anvil 400 and inside knife member 340.
[0063] As shown in Figure 4, the anvil 400 of the present example includes a breakable washer 417 within the annular cavity 418. This washer 417 is broken by knife member 340 when knife member 340 completes a full range of distal movement from the position shown in Figure 7C to the position shown in Figure 7D. The drive mechanism for knife member 340 can provide an increased mechanical advantage when knife member 340 reaches the end of its distal movement, thus providing greater force through which the washer breaks 417. Of course, the 417 break-away washer can be omitted entirely in some versions. In versions where washer 417 is included, it should be understood that washer 417 can also serve as a cutting edge for knife member 340 to assist in cutting the fabric. Such a cutting technique can be used in addition to, or in place of, the aforementioned shearing action between the inner edge 416 and the cut edge 342.
[0064] As the staple trigger member 350 moves distally from the position shown in Figure 7C to the position shown in Figure 7D, the staple trigger member 350 drives the staples 90 through the tissue of tubular anatomical structures 20, 40 and into the staple forming pockets 414 of the anvil 400. The staple forming pockets 414 deform the driven staples 90 in a B shape, as is known in the art. The clamps formed 90 in this way secure the ends
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20/71 of the tissue together, thus coupling the anatomical tubular structure 20 with the anatomical tubular structure 40.
[0065] After the operator has activated the staple head assembly 300 as shown in Figure 7D, the operator turns the knob 130 to actuate the anvil 400 distally away from the staple head assembly 300, increasing the gap span d to facilitate the release of tissue between surfaces 412, 322. The operator then removes the instrument 10 from the patient, with the anvil 400 still attached to the trocar 330. Referring again to the example in which the tubular anatomical structures 20, 40 comprise sections of a patient's colon, the instrument 10 can be removed through the patient's rectum. With the instrument 10 removed, the anatomical tubular structures 20, 40 are left attached together by two annular arrays of clamps 90 to an anastomosis 70, as shown in Figure 7E. The internal diameter of anastomosis 70 is defined by the cut edge 60 left by knife member 340.
IL Exemplary alternative stapling head set [0066] As noted above, in some cases, anatomical structures 20, 40 may comprise sections of a patient's colon. Figure 8 shows the staple head assembly 300 and a distal portion of the drive shaft assembly 200 arranged in a patient's colon C. As shown, the staple head assembly 300 and the drive shaft assembly 200 are inserted through the patient's rectum R. As also shown, the curvature of the curved section 212 is configured to generally complement the curvature of the patient's colon C. However, as also shown in Figure 8, there may be cases where the platform member 320 tends to compress the patient's colon C T tissue against the patient's sacrum S and / or some other substantially rigid anatomical structure
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21/71 da. Depending on the angle at which the operator has inserted the staple head assembly 300 and the drive shaft assembly 200, and / or depending on the force that the operator is applying to the staple head assembly 300 and the drive shaft assembly 200 during insertion, the T tissue of the patient's colon C may be damaged (e.g., torn) when the T tissue is compressed between the stapling head assembly 300 and the patient's sacrum S. In versions where the platform member 320 has tissue tightening and / or other protruding features (eg, staple guidance features, etc.), these features may increase the risk of damage to the T tissue of the patient's colon C as per the stapling head assembly 300 and the drive shaft assembly 200 are being inserted into the patient's colon C.
[0067] Similarly, as shown in Figure 9, people of ordinary skill in the art will recognize that the T tissue of colon C defines a plurality of F-folds, and that the staple head assembly 300 can bump into such F-folds as the staple head assembly 300 and the drive shaft assembly 200 are inserted into the patient's colon C. This bump can also create a risk of damaging the T tissue of the patient's colon C. Again, in versions where the platform member 320 has tissue tightening and / or other protruding features (for example, staple guidance features, etc.), these features can increase the risk of damage to the T tissue of the patient's colon C when the stapling head assembly 300 hits the folds F.
[0068] Therefore, it may be desirable to provide a version of the stapling head assembly 300 that minimizes the risk of damaging the T tissue of the patient's colon C during insertion of the stapling head assembly 300 and the drive shaft assembly 200 into the patient's colon C. In addition, it may be desirable
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22/71 can provide a version of the stapling head set 300 that includes features that improve the tightening of the fabric during the performance of the stapling head set 300, thus promoting better cutting of the fabric and positioning of the staple, without increasing the risk of damage to the T tissue of the patient's colon C during insertion of the stapling head assembly 300 and the drive shaft assembly 200 into the patient's colon C.
A. Exemplar platform member with flat zone θ fabric hitch feature zone [0069] Figure 10 shows an alternative exemplary stapling head assembly 500 that can be readily incorporated into the stapling instrument instead of the stapling head assembly 300. Except as described below, the staple head assembly 500 of this example is configured and operable exactly like the staple head assembly 300 described above. The staple head assembly 500 of this example includes a platform member 502 that has a platform surface 522 that defines two concentric annular arrays of staple openings 524. Staple openings 524 are arranged to match the arrangement of staple actuators 352 and the staple forming pockets 414 described above. In this way, each staple opening 524 is configured to provide a path for a corresponding staple driver 352 to drive a corresponding staple through the platform member 502 and into a corresponding staple forming pocket 414 when the staple head assembly 500 is triggered. The platform member 502 defines an internal diameter that is only slightly larger than the outside diameter defined by the knife member 540. The platform member 502 is thus configured to allow the knife member 540 to move distally to a point where the cutting edge 542 is available 870190044679, from 05/13/2019, p. 65/124
23/71 to the 522 platform surface.
[0070] Unlike the platform member 320 described above, the platform member 502 of the present example includes a first zone 510 and a second zone 550. The first zone 510 is characterized by the fact that the platform surface 522 is substantially flat within of the first zone 510. The first zone 510 includes an outer edge 520 that has a curved configuration. The outer edge 520 is thus configured to reduce the risk of the outer edge 520 bumping into tissue T when the staple head assembly 500 is inserted into the patient's colon C.
[0071] The second zone 550 is characterized by the fact that it has a sunken platform surface 552 with a plurality of spacer features 560 that project upwards from the sunken platform surface 552. A stepped transition 530 is formed at the boundaries between zones 510, 550, thereby providing a drawdown from the platform surface 522 to the lowered platform surface 552. In some versions, the transition 530 is oriented perpendicularly to the surfaces 522, 552, so that the transition 530 provides an abrupt drop from the platform surface 522 to the lowered platform surface 552. In some other versions, transition 530 is oriented obliquely to surfaces 522, 552, so that transition 530 provides an inclined transition between the platform surface 522 and the lowered platform surface 552. Alternatively, transition 530 may have a confi curved configuration or any other suitable configuration.
[0072] Spacing features 560 each include an outward facing surface 562, an outer wall portion 564, and an inner wall portion 566. Outward facing surfaces 562 are curved to complement the curved edge configuration
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24/71 external 520. The outward facing surfaces 562 are thus configured to reduce the risk of spacing resources 560 hitting tissue T when the staple head assembly 500 is inserted into the patient's colon C. The outer wall portions 564 are configured to partially wrap around the outer matrix of clamp openings 524. The outer wall portions 564 are thus configured and positioned to provide guidance for the clamps 90 exiting the outer matrix of clamp openings 524 The inner wall portions 564 are configured to partially wrap around the inner matrix of clamp openings 524. The inner wall portions 564 are thus configured and positioned to provide guidance for the clamps 90 exiting the inner matrix of clamp openings. 524.
[0073] Since each inner wall portion 566 is contiguous with a corresponding outer wall portion 564, and since the inner matrix of clamp openings 524 is angularly displaced with respect to the inner matrix of clamp openings 524, each distance feature 560 has, in general, a zigzag configuration. In the present example, the upper edges 568 of the spacer features 560 are located on the same plane as the platform surface 522, so that the upper edges 568 and the platform surface 522 come into contact with the fabric along the same plane. In other words, although the lowered platform surface 552 is lowered in relation to the upper edges 568, the platform surface 522 is not lowered in relation to the upper edges 568. In some other versions, at least a portion of the upper edges 568 extends above or below the plane of the 522 platform surface.
[0074] It should also be understood that the 560 spacing resources are distinctly formed in the present example, in a way
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25/71 that spans are located between each spacer 560 and the adjacent spacer 560. In some other versions, the spacer 560 are contiguous with each other.
[0075] The second zone 550 also includes an annular wall projecting upwards 592. The annular wall 592 is flush with the platform surface 522. The annular wall 592 is configured to compress a partially annular region of tissue against the anvil 400 thus providing assistance for the edge 542 of knife member 540 to shear the fabric. The annular wall 592 is contiguous and coplanar with the inner region of the platform surface 522, so that the annular wall 592 and the platform surface cooperate to compress a completely annular region of tissue against the anvil 400, thus providing uniform compression along a complete circumference of a tissue region. An annular recess 590 is formed between annular wall 590 and spacer features 560. In some other versions, inner wall portions 566 extend completely to annular wall 590, so that annular wall 590 is directly connected to the features distance 560 through internal wall portions 566.
[0076] It should be understood that the projected configuration of the spacing features 560 in relation to the lowered platform surface 552 will provide fabric engagement effects in the second zone 550 that are not provided in the first zone 510. In particular, when the fabric is compressed between the platform member 502 and the anvil 400, as described above, portions of the compressed tissue enter the recessed areas adjacent to the 560 spacing features. Having part of the tissue within these recessed areas can help to reduce the overall pressure than otherwise how it would be applied to the tissue if the tissue was being compressed against a
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26/71 platform surface consistently flat as platform surface 322. By reducing the total pressure on the fabric, the platform member 502 can reduce the risk of the fabric becoming fractured by excess compression. In addition to reducing total pressure on the fabric, the entry of portions of fabric into recessed areas adjacent to the 560 spacing features can provide a squeeze on the compressed fabric that is greater than the squeeze that could otherwise be obtained using a surface with a consistently flat platform like the 322 platform surface. The increased tightening of the fabric can promote a more accurate cut by the knife member 540 and also promote the more satisfactory positioning of the staples 90 in the fabric. In this way, the presence of the 560 spacing features can reduce the risk of tissue overcompression and also promote more effective tissue cutting and stapling.
[0077] As best seen in Figure 11, the first zone 510 extends along an angular band Θ of approximately 90 ° of the circumference of the platform member 502 in the present example. As an additional example only, the first zone 510 can extend along an angular band Θ less than approximately 90 ° from the circumference of the platform member 502. For example, the first zone 510 can extend along an angular band Θ between approximately 30 ° to approximately 90 ° of the circumference of the platform member 502; or between approximately 45 ° and approximately 90 ° of the circumference of the floor member 502.
[0078] As noted above, the entry of tissue into recessed areas adjacent to the 560 spacing features can reduce the risk of tissue overcompression and promote more effective tissue cutting and stapling during the operation of the anvil 400 and the head assembly. stapling 500. However, this
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27/71 same fabric entry in recessed areas adjacent to spacing features 560 may present some risks when inserting the staple head assembly 500 and drive shaft assembly 200 into the fabric. In other words, in the variations of the platform member 502 where the spacer features 560 are positioned along the complete circumference of the platform member 502, the T fabric may have a tendency to enter the recessed areas adjacent to the spacer features 560 during insertion of the drive shaft assembly 200 and a staple head assembly 500 into the patient's colon C. Any resulting T-tissue collision in the 560 spacing resources can increase the risk of damage to T-tissue in the event that T-tissue is being compressed against the sacrum S as described above with reference to Figure 8.
[0079] To avoid the aforementioned risks that could otherwise be associated with tissue bumping in the spacing resources 560 during insertion of the drive shaft assembly 200 and the staple head assembly 500 into the patient's colon C, the first zone 510 is positioned to correspond with the external curve 214 of the curved section 212 of the drive shaft assembly 200. As shown in Figure 8, the region of the stapling head assembly 300 that corresponds to the external curve 214 is the region of the stapling head set 300 that would tend to compress the T tissue against the sacrum S. Thus, by having a first zone 510 in that region, the stapling head set 500 avoids risks that could otherwise be associated with the resources of distance 560 during insertion of the drive shaft assembly 200 and the staple head assembly 500 in the colon of the patient's C; while still providing the advantages of the 560 distance features in the second zone
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28/71 when anvil 400 and stapling head assembly 500 are actuated.
[0080] Figure 12 shows a portion of an exemplary alternative stapling head assembly 600, comprising a knife member similar to a cylinder 640 and an alternative platform member 650. Stapling head assembly 600 is configured and operable just like the 500 stapling head assembly, except for the differences described below. In particular, the angular region of the platform member 650 shown in Figure 12 corresponds to the second zone 550 of the platform member 502. It should be understood that the platform member 650 may have another angular region that corresponds to the first zone 510 of the platform member platform 502 (i.e., to a flat platform surface like the platform surface 520). Alternatively, the platform member 650 can be configured with the same geometry, as shown in Figure 12, around the total circumference of the platform member 650. Naturally, the platform member 650 can have any other types of geometries and structural configurations around along the angular regions that have any other dispositions and relations with the angular region represented in Figure 12.
[0081] Like the platform member 502 described above, the platform member 650 of the present example includes an internal annular matrix of staple openings 624 (shown to be closest to knife member 640 and an external annular matrix of staple openings 624 shown as being further away from knife member 640). Although only an internal staple opening 624 and an external staple opening 624 are shown, it should be understood that additional staple openings 624 are provided in the inner and outer annular matrices that are angularly offset from each other, just like the openings in
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29/71 clamps 524 of the platform member 502.
[0082] Figure 12 also shows a plurality of structural features adjacent to the staple openings 624. In particular, a first surface with a rounded edge 670 is located away from the outer staple opening 624. A second surface with a rounded edge 672 is located between the outer and inner staple openings 624. A third rounded edge surface 674 is located close to the inner staple opening 624. All surfaces with rounded edges 670, 672, 674 extend along the same curve B in this example. It should be understood that surfaces with rounded edges 670, 672, 674 can be defined by a spacer feature such as the spacer feature 560 described above. In other words, the spacer feature 560 described above can be modified to provide surfaces with rounded edges 670, 672, 674 of the platform member 650, so that the spacer feature 560 has a generally concave cross-sectional profile along a transversal plane.
[0083] A recess 622 is formed away from the first surface with a rounded edge 670, with an angled surface 620 providing the floor of the recess 622. The angle of the angled surface 620 is oriented along a line B, which will be made reference again, below.
[0084] The platform member 602 also includes an annular wall projecting upwards 654, similar to the annular wall 592 described above. The annular wall 654 extends to a height so that the annular wall 654 ends distally in a position along curve B, described above. The distal end point of the annular wall 654 is also distal to the cutting edge 642 of the knife member 640. It should be understood that the annular wall 654 is configured to compress a region of the tissue against the anvil 400, thereby
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30/71 providing assistance for the edge 642 of the knife member 640 to shear the fabric. A recess 662 is formed away from annular wall 654, similar to recess 590 described above. Although the annular wall 654 provides a recess that defines the side wall 662, a steep wall 676 provides another recess that defines the recess. The wall 676 is contiguous with the third rounded edge surface 674 and provides a strongly inclined curved transition to an angled surface 660, which provides a recess floor 662. The angle of the angled surface 660 is oriented along the same line B such as the angle of the 620 angled surface described above.
[0085] As can be seen in Figure 12, line b slopes downward from the outside diameter of the staple head assembly towards the inside diameter of the staple head assembly. As can also be seen in Figure 12, due to the positioning and orientation of line B, and due to the positioning and configuration of curve A, the recess 662 is substantially deeper than the recess 622. Thus, as the depth of the recesses 622, 620 is proportional to the increased tightening of the fabric provided by recesses 662, 660, recess 662 would provide greater tightening of the fabric than recess 622. Similarly, the way in which the effective height of surfaces with rounded edges 670 .672, 674 progressively increases in the direction of the staple head assembly bore will also provide an increasingly tightening in the direction of the staple head assembly bore. On the other hand, the relatively shallow depth of the recess 622, and the relatively short height of the rounded-edge surface 670, will provide minimized drag against the T fabric as the staple head assembly 600 is advanced through
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31/71 of colon C. The curved profile provided by the rounded-edge surfaces 670, 672, 674 can also assist in minimizing drag against T tissue as the stapling head assembly 600 is advanced through colon C.
B · Exemplary platform member with zones having different aggressiveness of the fabric engaging features [0086] Figure 13 shows a portion of another exemplary alternative stapling head assembly 700, which comprises a knife member similar to a cylinder 740 and an alternate platform member 702. The staple head assembly 700 is configured and operable just like the staple head assembly 500, except for the differences described below. The staple head assembly 700 of this example includes a platform member 702 with an outer edge 720 that has a curved configuration. The outer edge 720 is thus configured to reduce the risk of the outer edge 720 colliding with tissue T as the stapling head assembly 700 is inserted into the patient's colon C.
[0087] Platform member 702 also has platform surfaces 722, 752 that define two concentric annular arrays of staple openings 724. Staple openings 724 are arranged to match the arrangement of staple actuators 352 and staple forming pockets 414 described above. In this way, each staple opening 724 is configured to provide a path for a corresponding staple driver 752 to drive a corresponding staple through the platform member 700 and into a corresponding staple forming pocket 414 when the staple head assembly 700 is triggered. The platform member 702 of the present example also includes an internal annular wall 754, which projects upwardly relative to the platform surfaces 722, 752. The annular wall 754
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32/71 defines an inner diameter that is only slightly larger than the outer diameter defined by knife member 740. Platform member 702 is thus configured to allow knife member 740 to move distally to a point where the edge of cut 742 is distal to the platform surfaces 722, 752 and the annular wall 754. The annular wall 754 is configured to compress a partially annular region of tissue against the anvil 400, thereby providing assistance for the edge 742 of the knife member 740 to shear the fabric.
[0088] Like the platform member 502 described above, the platform member 702 of the present example includes a first zone 710 and a second zone 750. In some versions, the first zone 710 extends over an angular range aproximadamente of approximately 45 ° of the circumference of the platform member 702. Just as an additional example, the first zone 710 can extend along an angular band Θ of up to approximately 90 ° of the circumference of the platform member 702. For example, the first zone 710 can extend over an angular band Θ between approximately 30 ° to approximately 90 ° of the circumference of the platform member 702; or between approximately 45 ° and approximately 90 ° of the circumference of the floor member 702.
[0089] The first zone 710 includes the platform surface 722, which is obliquely angled with respect to the longitudinal geometric axis of the staple head assembly 700. In particular, as shown in Figure 15 and as described in greater detail below, the surface platform 722 slopes downward or proximally from the outer edge 720 to the radially innermost platform surface region 722. In some other versions, the platform surface 722 extends along a plane that is perpendicular to the geometric axis longitudinal set
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33/71 stapling head 700.
[0090] The first zone 710 also includes a plurality of spacer features 730 that project upwardly from platform surface 722. The spacer features 730 each include an outer wall portion 732 and a wall portion inner wall 736. The outer wall portions 732 are configured to partially surround around the outer matrix of clamp openings 724. The outer wall portions 732 are thus configured and positioned to provide guidance for the clamps 90 exiting the outer matrix of openings staple 724. The inner wall portions 736 are configured to partially surround around the inner matrix of staple openings 724. The inner wall portions 734 are thus configured and positioned to provide guidance for the staples 90 exiting the inner matrix of staples. clip openings 724. An annular recess 776 is formed between the annular wall 754 and the distance features to 730. In some other versions, the inner wall portions 736 extend completely to the annular wall 754, so that the annular wall 754 is directly connected to the spacer features 730 through inner wall portions 736.
[0091] Since each inner wall portion 736 is contiguous with a corresponding outer wall portion 732, and since the inner matrix of clip openings 724 is angularly displaced with respect to the inner matrix of clip openings 724, each distance feature 730 has, in general, a zigzag configuration. It should also be understood that the spacing resources 730 are distinctly formed in the present example, so that gaps are located between each spacing resource 730 and the adjacent spacing resources 730. In some other versions, the spacing resources 730 are contiguous
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34/71 with each other.
[0092] In the version shown in Figures 13 to 14, the upper edges 768 of the spacer features 760 are located below the plane of the upper edge of the annular wall 754, so that the annular wall 754 will come into contact with the fabric just before upper edges 768 come into contact with the fabric. In some other versions, as shown in Figure 15, at least a portion of the upper edges 768 is located along the same plane as the upper edge of the annular wall 754, so that the upper edges 768 and the annular wall 754 will come into contact with the fabric along the same plane.
[0093] Regardless of the relationship between the height of the upper edges 768 and the height of the annular wall 754, it should be understood that the upper edges 768 may have any suitable relationship with the platform surface 752. For example, in the version shown in Figure 13, the upper edges 738 of the spacer features 730 are located on the same plane as the platform surface 752, so that the upper edges 738 and the platform surface 752 will contact the fabric along the same plane. In other words, although the platform surface 752 is lowered in relation to the upper edges 768 of the spacer features, the platform surface 752 is not lowered in relation to the upper edges 738 of the spacer features 730. In some other versions, as shown in Figure 14, at least a portion of the upper edges 738 extends above the plane of the platform surface 752. In still other versions, at least a portion of the upper edges 738 extends below the plane of the platform surface 752.
[0094] The second zone 750 also has a plurality of 760 spacing resources that project upwards from
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35/71 a platform surface 752. Unlike the platform surface 722 of the first zone 710, the platform surface 752 of the second zone 750 extends along a plane that is perpendicular to the longitudinal geometric axis of the staple head assembly 700 As can be seen best in Figure 14, an inclined transition surface 774 provides a transition between platform surface 752 and platform surface 722, so that transition surfaces 774 have defined the boundaries between the first and second zones 710, 750. While each transition surface 774 is sloped in the present example, it should be understood that transition surface 774 can have any other suitable configuration. For example, the transition surface 774 can provide a strong drawdown for example, like the transition 530 described above, a curved transition, or any other suitable type of transition.
[0095] Spacing features 760 each include an outward facing surface 764, an outer wall portion 762, and an inner wall portion 766. Outward facing surfaces 764 are curved to complement the curved edge configuration outer 720. The outward facing surfaces 762 are thus configured to reduce the risk of spacer features 760 hitting tissue T when stapling head assembly 700 is inserted into the patient's C colon. The outer wall portions 762 are configured to partially surround around the outer matrix of clamp openings 724. The outer wall portions 762 are thus configured and positioned to provide guidance for the clamps 90 exiting the outer matrix of clamp openings 724 The inner wall portions 766 are configured to partially wrap around the inner matrix of clip openings 724. The inner wall portions 764 are
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36/71 thus configured and positioned to provide guidance for the clamps 90 exiting the internal matrix of clamp openings 724. An annular recess 770 is formed between the annular wall 754 and the spacer features 760. In some other versions, the portions inner wall 766 extend completely to annular wall 754, so that annular wall 754 is connected directly to spacer features 760 through portions of inner wall 766.
[0096] Since each inner wall portion 766 is contiguous with a corresponding outer wall portion 762, and since the inner matrix of clip openings 724 is angularly displaced with respect to the inner matrix of clip openings 724, each distance feature 760 has, in general, a zigzag configuration. It should also be understood that the spacing resources 760 are distinctly formed in the present example, so that gaps are located between each spacing resource 760 and the adjacent spacing resources 760. In some other versions, the spacing resources 760 are contiguous with each other.
[0097] In the version shown in Figure 13, the upper edges 768 of the spacer features 760 are located above the plane of the upper edge of the annular wall 754, so that the upper edges 768 will come into contact with the fabric just before the wall ring 754 to contact the fabric. In some other versions, at least a portion of the upper edges 768 is located along the same plane as the upper edge of the annular wall 754, so that the upper edges 768 and the annular wall 754 will come into contact with the tissue along the same plan. In still other versions, at least a portion of the upper edges 768 are located below the annular wall plane 754, so that the wall
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37/71 annular net 754 will come into contact with the fabric just before the upper edges 768 come into contact with the fabric.
[0098] Figure 15 shows an example of a cross-section profile that can be used in the first zone 710. In such versions, the upper edges 768 in the second zone 750 are located above the plane of the upper edge of the annular wall 754. However, it should be understood that the cross-sectional profile shown in Figure 15 can alternatively be used in the second zone 750. In such versions, the upper edges 738 in the first zone 710 are located below the plane of the upper edge of the annular wall 754. In the present example , Figure 15 shows how the platform surface 722 slopes downward from the outer region of the platform member 702 towards the inner region of the platform member 702, along line E. Figure 15 also shows how the edge upper 738 of the spacer feature 730 and the upper edge of the annular wall 754 all extend along the same curve D. Obviously, this configuration and set of relationships it is just an illustrative example.
[0099] It should be understood that the projected configuration of the spacer features 760 in relation to the platform surface 752 will provide tissue engagement effects similar to those described above in the context of the platform member 502. In particular, when the fabric is compressed between the platform member 702 and the anvil 400, as described above, portions of the compressed tissue enter the recessed areas adjacent to the 760 spacing features. Having part of the tissue within these recessed areas can help reduce the overall pressure that would otherwise be applied to the fabric if the fabric was being compressed against a consistently flat platform surface like the 322 platform surface. By reducing the total pressure on the fabric, the mem
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38/71 platform broiler 702 can reduce the risk of the fabric becoming fractured by excessive compression. In addition to reducing the total pressure on the fabric, the entry of fabric portions into recessed areas adjacent to the 760 spacing features can provide a squeeze on the compressed fabric that is greater than the squeeze that could otherwise be obtained using a surface with a consistently flat platform like the 322 platform surface. The increased tightening of the fabric can promote a more accurate cut by the knife member 740 and also promote the more satisfactory positioning of the staples 90 in the fabric. In this way, the presence of the 760 spacing features can reduce the risk of over-compressing the fabric and also promote more effective tissue cutting and stapling.
[0100] It should be understood that the increased tightening and the reduction of the risk of overcompression described above can also be provided in the first zone 710. In particular, the projection configuration of the spacer features 730 in relation to the platform surface 722 will provide some effects of tissue engagement, although these effects may be less pronounced in the first zone 710 than in the second zone 750. When the tissue is compressed between the platform member 702 and the anvil 400 as described above, portions of the compressed tissue will enter the adjacent recessed areas to the 730 spacing features. This can reduce the total pressure that would otherwise be applied to the fabric if the fabric was being compressed against a consistently flat platform surface like the 322 platform surface; and it can also provide a squeeze on the compressed tissue that is greater than the squeeze that could otherwise be obtained using a consistently flat platform surface like the 322 platform surface. Thus, the presence of spacers 730 at
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39/71 first zone 710 can also reduce the risk of excess compression of the tissue and promote more effective cutting and stapling of the tissue within the first zone 710.
[0101] In versions of the first zone 710 having a cross-sectional profile like the one shown in Figure 15, it should be understood that the effects of engaging the fabric may be more pronounced in the inner region of the first zone 710 than the effects of engaging the fabric in the outer region of the first zone 710. In other words, due to the combination of the structural features being positioned along the downward sloping line E and the structural features being positioned along the curve D, the fabric engagement effects of the features of distance 730 may increase progressively from the outermost region of the first zone 710 to the innermost region of the first zone 710.
[0102] As noted above, the entry of tissue into recessed areas adjacent to the spacer features 730, 760 can reduce the risk of tissue overcompression and promote more effective tissue cutting and stapling when the anvil 400 and the stapling head 700. However, this same tissue entry in recessed areas adjacent to the spacer features 760 may present some risks when inserting the stapling head assembly 700 and the drive shaft assembly 200 into the fabric. In other words, in variations of the platform member 702 where the complete circumference of the platform member 502 is configured as the second zone 750 of the platform member 702, the T fabric may have a tendency to enter the recessed areas adjacent to the spacing features 760 during insertion of the drive shaft assembly 200 and a stapling head assembly 700 into the patient's colon C. Any resulting bump of the T fabric in the distance resources
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40/71 ment 760 may increase the risk of damage to T tissue in the event that T tissue is being compressed against the sacrum S as described above with reference to Figure 8.
[0103] To avoid the aforementioned risks that could otherwise be associated with tissue bumping on the spacing resources 760 during insertion of the drive shaft assembly 200 and the staple head assembly 500 into the patient's colon C, the first zone 710 is positioned to correspond with the external curve 214 of the curved section 212 of the drive shaft assembly 200. As shown in Figure 8, the region of the staple head assembly 300 that corresponds to the external curve 214 is the region of the stapling head assembly 300 that would tend to compress the T fabric against the sacrum S. It should be understood that the reduced effective height of the spacer features 730 in relation to the spacer features 760 may cause the spacer features 730 to present a risk lesser of the 730 spacing capabilities of compressing the T tissue against the sacrum S, compared to the risk of such compression presented by the s 760 distance features.
[0104] Thus, because it has the first zone 710 in the region of the staple head assembly 300 that would tend to compress the T fabric against the sacrum S, the staple head assembly 700 avoids risks that could otherwise be associated the spacing features 760 during insertion of the drive shaft assembly 200 and the staple head assembly 700 into the colon of the patient's C; while still providing the advantages of spacing features 760 in the second zone when anvil 400 and stapling head assembly 700 are actuated. In addition, the presence of spacer features 730 in the first zone 710 may still provide some of the same
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41/71 fabric that are provided by the 760 spacer features, although to a lesser extent than the fabric hitch benefits that are provided by the 760 spacer features.
C · Exemplary platform member with combination of connected and non-connected hitch features [0105] Figure 16 shows a portion of an alternative exemplary stapling head assembly 800, comprising a knife member similar to a cylinder 840 and a member alternative platform 850. The stapling head assembly 800 is configured and operable just like the stapling head assembly 500, 600, 700, except for the differences described below. In some versions, the angular region of the platform member 850 shown in Figure 16 corresponds to only a portion of the complete angular range of the platform member 850. In some other versions, the angular region of the platform member 850 shown in Figure 16 corresponds to the complete angular range of the platform member 850. Naturally, the platform member 850 can have any other types of geometries and structural configurations along the angular regions that have any other arrangements and relationships with the angular region represented in Figure 16.
[0106] Like the platform member 502, 650, 702 described above, the platform member 850 of the present example includes an internal annular matrix of clip openings 824 (shown as being closest to knife member 840) and an annular matrix clamp openings 824 (shown as being further away from knife member 840). Although only an internal staple opening 824 and an external staple opening 824 are shown, it should be understood that additional staple openings 824 are provided in the inner and outer annular arrays that are angularly offset from each other, exactly as
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42/71 the clamp openings 524, 724 of the platform member 502, 702. [0107] Figure 16 also shows a first spacing feature 880 that surrounds the outermost clamp opening 824 and a second spacing feature 860 that surrounds the innermost clamp opening 824. The first spacing feature 880 includes a curved outer wall 882 that ends in and out at the platform surface 822. The platform surface 822 ends out at a curved outer edge 820. A recess 870 is defined close to the first distance feature 880, with the platform surface 822 defining an inclined recess floor 870. In particular, the regions of the platform surface 822 that are close to and away from the first distance feature 880 are oriented along line G, which slopes downward from the outer region of the 802 platform member towards the inner region of the platform 802. In some other versions, this line G is oriented perpendicular to the longitudinal geometric axis of the staple head assembly 800. In still other versions, this line G slopes upwards from the outer region of the 802 platform member towards the inner region of the 802 platform member.
[0108] The second spacer feature 860 includes an inclined top surface 862 that ends outwardly on the platform surface 822 in the recess 870. The top surface 862 ends inwardly on the inner wall 854 of the platform member 802. Although not shown, it must it will be understood that the platform member 802 may also include a separate annular wall, such as the annular walls 592, 654, 754 described above, which may extend along the angular regions of the platform member 802 where the second spacer features 860 are angularly spaced from each other. In other words, 860 distance features
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43/71 can be distinctly positioned in an angularly spaced array, with the 860 spacing features being integral with an annular wall that extends between the 860 distinct spacing features.
[0109] As shown in Figure 16, the top edge 824 of the first distance feature 880 and the surface and top 862 of the second distance feature 860 extend along the same plane, indicated by line F. This line F slopes to down from the outer region of the 802 platform member towards the inner region of the 802 platform member. In the present example, the slope of line G is more pronounced than the slope of line F, although this relationship can be reversed in some other versions. It should be understood that the relative orientations of lines F, G in this example cause the second spacing feature 860 to have an effective height greater than the effective height of the first spacing feature 880. In some other versions, the first spacing feature 880 has an effective height greater than the effective height of the second spacing feature 860.
[0110] It should be understood that the combination of the distance features 860, 880 and the recess 870 can provide tissue engagement effects similar to those described above. In particular, the combination of the spacing features 860, 880 and the recess 870 can provide marked tissue tightening by the platform member 802 while also providing a reduced pressure profile against the fabric being compressed between the anvil 400 and the platform member 802. To the extent that the second standoff features 860 have an effective height greater than the effective height of the first standoff features 880, the effects of tissue engagement may be more pronounced towards the inner region of the limb
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44/71 of 802 platform compared to the tissue engagement effects provided in the inner region of the 802 platform member.
[0111] It should also be understood that the platform member 802 may include a zone where the distance resources 860, 880 are omitted or at least less pronounced. Having such a zone can reduce the risk of the 802 platform member bumping against the T tissue as the staple head assembly 800 is being inserted into the patient's colon. Similarly, having this zone can reduce the risk of the platform member 802 damaging the T tissue by compressing the T tissue against the sacrum S as the staple head assembly 800 is being inserted into the patient's colon C. In such versions that have a no-bump zone, the no-bump zone can be positioned to correspond with the external curve 214 of the curved section 212 of the drive shaft assembly 200.
D. Exemplary platform member with tissue engagement features to limit tissue flow [0112] In some cases when tissue is being compressed between anvil 400 and platform member 320, the tissue may tend to migrate or flow, in and / or out in radial directions, from the space between the anvil 400 and the platform member 320. In addition, or alternatively, in some cases when the fabric is being compressed between the anvil 400 and the platform member 320, the fabric may tend to migrate or flow in a twisted manner around the longitudinal geometric axis of the stapling head assembly 300 and the anvil 400. Therefore, it may be desirable to provide a modified version of the platform member 320 with the coupling features of avoiding or otherwise controlling the migration or flow of the tissue in radial and angular directions.
[0113] Figure 17 shows an alternative exemplary platform member 900 that can be incorporated into the head assembly.
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45/71 stapling 300 instead of platform member 320. The platform member 900 of the present example includes a platform surface 922 that defines an internal ring matrix of staple openings 924 and an external ring matrix of staple openings 924. The platform member 900 additionally includes an angularly spaced array of spacer features 930. spacer features 930 are angularly spaced in an array around the full circumference of platform member 900 in the present example. A corresponding angularly spaced set of radially extending channels 950 is formed between the spacer features 930. Channels 950 are tapered so that channels 950 have a greater angular width in the radially outer region of the platform member 900 than the angular width channels 950 in the radially internal region of channels 950. Channels 950 pass over the outer matrix of clamp openings 924, so that each channel 950 is associated with a corresponding clamp opening 924. It should be understood that some alternative versions of the platform member 900 may include a zone where the 930 spacing features are omitted or less pronounced, etc.
[0114] Each spacer feature 930 includes an outer portion that extends angled 932 and a set of inner portions that extend radially 934. Each outer portion 932 includes a curved outer edge 920. Each outer portion 932 also partially surrounds the ends angularly outermost of the adjacent staple openings 924. In particular, each outer portion 932 partially surrounds only one end of a corresponding first staple opening 924 while also partially surrounding only one end of a corresponding second staple opening 924. Thus, a single outer portion 932 does not surround both ends of the same clamp opening 924.
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46/71 [0115] In contrast, each set of inner portions 934 for each spacer feature 930 partially surrounds both angularly outer ends of the angularly adjacent staple openings 924. The inner portions 934 are tapered in this example, so that the inner portions 934 of each spacer feature 930 define a corresponding tapered recess 940. Each recess 940 leads to a corresponding clamp opening 924 in the internal array of clamp openings 924. The recesses 940 are tapered so that each recess 940 has a width greater angular in the radially internal region of the platform member 900 than the angular width of the recess 940 in the corresponding clamp opening 924.
[0116] It should be understood that the 930 spacer features can provide fabric engagement features similar to those described above. In particular, the combination of spacer features 930, channels 950, and recesses 940 can provide a marked tightening of the fabric by the platform member 900 while also providing a reduced pressure profile against the fabric that is compressed between an anvil that 400 and the member platform 900. In addition, the configuration of channels 950 and recesses 940 can minimize or otherwise control the migration or flow of tissue in and / or out in radial directions, from the space between the anvil 400 and the limb platform 900, as the fabric is being compressed between the anvil 400 and the platform member 900. Similarly, the configuration of channels 950 and recesses 940 can prevent the migration or flow of tissue in a twisted shape around the longitudinal geometric axis of the stapling head and anvil set 300 400, as the fabric is being compressed between the anvil 400 and 900 platform member.
[0117] Figure 18 shows another alternate platform member
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The example member 1000 can be incorporated into the staple head assembly 300 instead of the platform member 320. The platform member 1000 of the present example includes a platform surface 1022 that defines an internal annular matrix of staple openings 1024 and an outer annular array of clip openings 1024. The platform member 1000 additionally includes an angularly spaced array of spacers 1030. The spacers 1030 are angularly spaced in a matrix around the complete circumference of the platform member 1000 in the present example. Each spacer feature 1030 partially surrounds the end of a staple opening 1024 from the internal array of staple openings 1024 and a staple opening 1024 from the outer array of staple openings 1024. Each spacer feature 1030 also includes a curved outer end 1020. It should be understood that some alternative versions of platform member 1000 may include a zone where spacing features 1030 are omitted or less pronounced, etc.
[0118] An angularly spaced array of first channels extending radially 1026 and an angularly spaced array of second channels extending radially 1028 are formed between the spacer features 1030. Channels 1026 are angularly interposed between channels 1028, so that channels 1026, 1028 are arranged in matrix in an alternating manner. Channels 1026 are tapered so that each channel 1026 has a smaller angular width in the radially inner region of the platform member 1000 than the angular width of channel 1026 in the radially outer region of the platform member 1000. In contrast, channels 1028 are tapered so that each channel 1028 has a greater angular width in the radially internal region of the member
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48/71 platform 1000 than the angular width of channel 1028 in the radially outer region of platform member 1000.
[0119] It should be understood that the 1030 spacing features can provide coupling features similar to those described above. In particular, the combination of the spacer features 930 and the channels 1026, 1028 can provide a marked tightening of the fabric by the platform member 1000 while also providing a reduced pressure profile against the fabric that is compressed between an anvil that 400 and a member of platform 1000. In addition, channel configuration 1026, 1028 can minimize or otherwise control the migration or flow of tissue in and / or out in radial directions, from the space between the anvil 400 and the platform member 1000, as the fabric is being compressed between the anvil 400 and the platform member 1000. Similarly, the configuration of channels 1026, 1028 can prevent the migration or flow of tissue in a twisted shape, around the longitudinal geometric axis of the stapling head assembly 300 and anvil 400, as the fabric is being compressed between the anvil 400 and the platform member 1000.
E · Exemplary platform member with fabric engaging recesses [0120] Figures 19 to 20 show another alternative exemplary platform member 1100 that can be readily incorporated into the staple head assembly 300 in place of platform member 320. O platform member 1100 of this example is configured and operable exactly as platform member 320 except as otherwise described below. The platform member 1100 of the present example comprises an internal ring matrix of clip openings 1124 and an external ring matrix of clip openings 1124. The platform member 1124 includes additional
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49/71 a first platform surface 1120, a second platform surface 1132, and a curved outer edge 1126. Clamp openings 1124 are formed through the second platform surface 1132, with the first platform surface 1120 being located outside of the second 1132 platform surface.
[0121] As can be seen better in Figure 20, the second platform surface 1132 projects slightly in relation to the first platform surface 1120, so that the first platform surface 1120 is lowered in relation to the second platform surface 1132. The portions of the first platform surface 1120 extend inwardly with respect to the spaces between the outer matrix of staple openings 1124, thereby effectively forming recesses 1122 between the staple openings 1124 of the outer matrix of the staple openings 1124. In the present example , the platform member 1100 additionally provides transition surfaces 1134 at an angle between surfaces 1120, 1132. In the present example, transition surfaces 1134 are flat and obliquely angled with respect to surfaces 1120, 1132, thus providing an inclined transition between the surfaces 1120, 1132. In some other versions, the surfaces of t 1134 are curved. In some other versions, the transition surfaces 1134 are perpendicular to the surfaces 1120, 1132, thus providing a heavily recessed transition between the surfaces 1120, 1132.
[0122] The platform member 1100 of the present example additionally includes a set of triangular recesses 1160 formed on the second platform surface 1132. Each triangular recess 1160 includes a floor 1162 and three side walls positioned at an angle 1164 that provide a transition between the surface platform 1132 and floor 1162. In the present example, side walls 1164 are angled obliquely to the surface
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1132 and floor 1162, thus providing an inclined transition between surface 1132 and floor 1162. In some other versions, side walls 1164 are curved. In some other versions, side walls 1164 are perpendicular to surface 1132 and floor 1162, thus providing a heavily recessed transition between surface 1132 and floor 1162. In the present example, and as can be seen best in Figure 21, the floor 1162 is located on the same plane as the first 1120 platform surface. In some other versions, floor 1162 is higher or lower than the first 1120 platform surface.
[0123] As can be seen better in Figure 19, the triangular recesses 1160 are configured and positioned so that the outermost point of each triangular recess is located between the corresponding staple openings 1124 of the internal matrix of staple openings 1124. According to Also shown in Figure 19, the platform member 1100 of the present example provides a first zone 1110 that extends along a first angular band of the platform member 1100 and a second zone 1150 that extends along a second angular band of the platform member 1100. Triangular recesses 1160 are included in the second zone 1150 but not in the first zone 1110. In some other variations, the triangular recesses 1160 are arranged along the total angular extent of the platform member 1000, so that there are no different zones 1110, 1150.
[0124] Figure 21 shows how indentations 1122, 1160 provide engagement effects on the fabric L ·, l_ ₂ being compressed between the anvil 400 and the platform member 1100 within the second zone 1150. In this illustration, a upper layer of fabric U is adjacent to anvil 400 while a lower layer of fabric l_2 is adjacent to platform member 1100, with both beds
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51/71 of Li tissue l_ ₂ also being adjacent to one another. As shown, an outer region radially tissue L ₂ to enter the recess 1122, a radially innermost region of l- fabric ₂ and enters the recess 1160 and a middle region of tissue L ₂ b is fully compressed against the second platform surface 1132 In other words, the compression of the L ₂ a, L ₂ c tissue regions is less than the compression of the L ₂ b tissue region. It is to be understood that within the tissue regions L ₂ a, L ₂ c can reduce the total pressure applied to the tissue Li, ₁₂ ; and / or may provide an enhanced gripping effect on the tissue Li, l- _2.
[0125] It should be understood from the aforementioned that recesses 1122, 1160 can provide tissue engagement effects that are similar to the tissue engagement effects described above as being provided by various types of detachment features. In addition, by relying on recesses rather than spacings to provide such tissue engaging effects, platform member 1100 can provide an additional reduced risk of bumping into T fabric during insertion of the stapling head assembly 300 into colon C of the patient.
F. Exemplar platform member that provides variable staple height [0126] Figure 22 shows another example staple head assembly 1200 that can be readily incorporated into instrument 10 instead of staple head assembly 300. Figure 22 also shows another exemplary anvil 1250 that can be used in place of anvil 400. The stapling head assembly 1200 and the anvil 1250 are substantially identical to the stapling head assembly 300 and the anvil 400 described above, respectively, except for the differences described below. The gift clipping head assembly 1200
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52/71 example comprises a pair of clamps 1210, 1214 with corresponding clamp drivers 1212, 1216; a curved platform surface 1220; and a knife member 1204. In this example, the clamp 1214 has a higher height than the clamp 1210, and the clamp actuators 1212, 1216 are positioned and configured to take into account these differences in clamp heights. It will be understood that the staple head assembly 1200 includes an internal annular matrix of angularly spaced staples 1210 and corresponding staple drivers 1212; and an external annular matrix of angularly spaced clamps 1214 and corresponding clamp drivers 1216.
[0127] The curvature of the 1220 platform surface is contoured and positioned so that the outer region of the 1220 platform surface is at a more proximal or lower location than the inner region of the 1220 platform surface. Due to this curvature, staples 1210 will exit the platform surface 1220 at a point ci which is distal to point C2 at which staple 1214 will exit the platform surface 1220. In addition, the curvature of the platform surface 1220 will provide variable pressure to the fabric layers l_ ₃ , l_4 compressed between the platform surface 1220 and the anvil 1250. In addition, due to the curvature of the platform surface 1220, the platform surface 1220 will tend to squeeze the tissue layers l ₃ , l 4 radially outward as the l- layers of fabric _3, l_4 are compressed between the surface platform 1220 and anvil 1250.
[0128] The anvil 1250 of the present example comprises a pair of staple forming pockets 1254, 1256. The staple forming pocket 1254 is positioned to correspond with the staple 1210 while the staple forming pocket 1214 is positioned to correspond with the staple 1214 The staple-forming pocket 1254 is located in a position there that is proximal to the position
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53/71 to ₂ in which the staple-forming pocket 1256 is located. Anvil 1250 also includes a breakable washer 1252, which is similar to breakable washer 417 as described above. In particular, washer 1252 is broken by knife member 1204 when knife member 1204 completes a full range of distal movement by actuation of staple head assembly 1200.
[0129] Figure 23 shows the tissue layers l_ ₃ , U after the staple head assembly 1200 has been actuated to cut and staple the tissue l_ ₃ , l_4. In particular, Figure 23 shows staples 1210 implanted in an internal region of tissue l_ ₃ , U, with staples 1214 being implanted in an external region of tissue l_ ₃ , l_4. The implanted clamp 1210 has a height xi that is shorter than the height x ₂ of the implanted clamp 1214. This is due to the fact that the unformed clamp 1210 was smaller than the unformed clamp 1214, the exit point ci of the clamp 1210 is distal to the exit point c ₂ of the staple 1214, and the position ai of the staple-forming pocket 1254 is proximal to the position a ₂ of the staple-forming pocket 1256. It should be understood that when providing these varying heights xi, x ₂ , the installed clamps 1210, 1214 can maintain the varied pressure profile that has been applied against the layers of fabric l_ ₃ , l_4 by the curved platform surface 1220 and corresponding anvil surface 1250.
G · Exemplary clamp platform member with combination of rigid and elastomeric features [0130] Figures 24 to 26 show another example 1300 staple head assembly that can be readily incorporated into instrument 10 instead of the staple head assembly 300. The 1300 staple head assembly is substantially identical to the 500 staple head assembly described above, except for the differences described below. The 1300 staple head assembly of the present example comprises a member
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54/71 of platform 1350 having a platform surface 1352 which defines two concentric annular arrays of clip openings 1324. The clip openings 1324 are arranged to correspond to the arrangement of the clip drivers 352 and the clip forming pockets 414 described above. In this way, each clamp opening 1324 is configured to provide a path for a corresponding clamp driver 352 to drive a corresponding clamp 90 through the platform member 1350 and into a corresponding clamp forming pocket 414 when the stapling 1300 is triggered. The platform member 1350 defines an internal diameter that is only slightly larger than the outside diameter defined by the knife member 1340. The platform member 1350 is thus configured to allow the knife member 1340 to move distally to a point where the cutting edge 1342 is distal to the platform surface 1352.
[0131] In the present example, a plurality of spacers 1360 project upwardly from the platform surface 1352. Each spacer 1360 comprises a wall 1364 that partially wraps around one end of an internal staple opening 1324 and one end of an external clamp opening 1324, with a zigzag configuration that is identical to the configuration of the spacing features 560 described above.
[0132] The platform member 1350 of the present example also includes an annular wall projecting upwards 1354. The annular wall 1354 of this example is configured and operable in the same way as the annular wall 592 described above. An annular recess 1390 is formed between the annular wall 1354 and the spacer 1360. In some other versions, the annular wall 1354 is directly connected to the spacer 1360. It must also be
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55/71 it is understood that the platform member 1350 can be divided into zones such as the zones described above. For example, platform member 1350 may have spacer features 1360 located in an angular region of platform member 1350 for example, similar to zones 550, 750 described above; with another angular region of the platform member 1350 being flat for example, similar to zone 510 described above or having less pronounced versions of distance features 1360 for example, similar to zone 710 described above. Alternatively, the 1360 spacing features can extend around the full angular range of the 1350 platform member.
[0133] It should also be understood that 1360 spacing features can provide tissue engaging effects similar to those provided by other tissue engaging features described in the present invention, including, but not limited to, 560 spacing features. In this way, the 1360 spacing features can reduce the total pressure that would otherwise be applied to the compressed tissue against the 1350 platform member, improve the tightness of the tissue that is compressed against the 1350 platform member, and / or provide other fabric hitch effects.
[0134] In contrast to the 560 spacing features described above, the 1360 spacing features of the present example are partially deformable. In particular, an outer region of the spacer 1360 is formed primarily by an elastomeric member 1370 while an inner region of the spacer 1360 is formed primarily by a rigid base member 1380. As can best be seen in Figure 25, the limb platform 1350 provides an inclined interface between the rigid base member 1380 and the elastomeric member 1370, so that the inner region of the elastomeric member 1370 is thinner than the outer region of the mem
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56/71 elastomeric bro 1370, with wall 1364 still providing a flat distal surface through which clamps 90 come out.
[0135] Figure 26 shows anvil 400 compressing layers of tissue 15, L ₆ against the platform member 1350. As shown, the elastomeric member 1370 compressively deforms against the layer of tissue ₁₆ . It should be understood that even with the elastomeric member being compressible 1370, the distancing means 1360 may also provide a marked tightening of l- fabric ₆ at least during an initial stage of the compression fabric l_ _{5, 6} l_. The base member rigidity 1380, combined with the reduced thickness of the elastomeric member 1370 in the inner region of detachment resources 1360, and the presence of the recess 1390 can additionally provide an enhanced grip l- tissue ₆ during full range of compression of the fabric l_5, l_ ₆ . Deformation of the elastomeric member 1370 may additionally allow the platform member 1350 to provide a pressure profile against the tissue layers ₁₅ , ₁₆ that varies along the radial extension of the platform member 1350. In particular, the platform member 1350 may provide greater tissue compression l_5 L ₆ in the 1350 platform member inner region compared to the outer region of the platform member 1350. This variable compression may further tighten the fabric ₅ l_, l_ ₆ radially outward as that the fabric ₁₅ , ₁₆ is being compressed between the platform member 1350 and the anvil 400.
[0136] In addition to providing a different tissue tightening profile and a variable pressure profile against the fabric, the 1370 elastomeric member can also reduce the risk of the 1360 spacing features bumping into the T fabric as the 1300 staple head assembly is inserted into a patient's colon C. In particular, in the case where the outer regions of the 1360 spacing features meet a fold F of the fabric T or a region of fabric T
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57/71 that is adjacent to the patient's sacrum S, the 1370 elastomeric member can simply deform to absorb the forces that impose against the 1360 distance features. Thus, the inclusion of the 1370 elastomeric member can provide a reduced risk of damage to the compared to the risk posed by the 1360 spacing feature versions that are completely rigid.
H · Exemplary clamp platform member with combination of rigid θ elastomeric features [0137] Figures 27 to 28 show another exemplary stapling head assembly 1400 that can be readily incorporated into instrument 10 instead of the stapling head assembly 300. The stapling head assembly 1400 is substantially identical to the stapling head assembly 300 described above, except for the differences described below. The staple head assembly 1400 of the present example comprises a curved platform surface 1450 having a rounded outer edge 1420. A plurality of staple openings 1424 are formed across the platform surface 1450.
[0138] Although the platform surface 1450 generally has a curved profile in this example, the platform surface 1450 defines a set of flat surfaces 1434, 1436, 1438 adjacent to the clip openings 1424. In particular, the flat surfaces 1434 are located close together of each inner clip opening 1424. The flat surfaces 1436 are located close to each outer clip opening 1424. Each flat surface 1436, 1434 is adjacent to a corresponding inner wall 132 leading to an inner annular portion 1430. The inner annular portion 1430 is configured to function similarly to annular wall 592, so that inner annular portion 1430 is configured to compress a region
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58/71 partially annular tissue against anvil 400, thereby providing assistance for the edge 1404 of knife member 1402 scraping the tissue. Flat surfaces 1438 are located away from each inner and outer clamp opening 1424. Flat surfaces 1438 transition directly to the rounded outer edge 1420.
[0139] The platform surface 1450 also defines a zigzag wall 1452 that partly wraps around the ends of clip openings 1424. It should be understood that the recessed aspect of the flat surfaces 1434, 1436, 1438 in relation to the walls 1452 will provide regions for the fabric to enter as the fabric is compressed against the platform surface 1450 by anvil 400. Zigzag walls 1452 can provide fabric engagement effects similar to those described above, including reducing the total pressure that would otherwise be applied to the tissue compressed against the platform member 1450, accentuating the tightness of the tissue that is compressed against the platform member 1450, and / or providing other tissue engaging effects.
[0140] It should also be understood that the curved profile of the platform surface 1450 can provide effects similar to those described above in relation to the platform surface 1220. In particular, the curvature of the platform surface 1450 can provide variable pressure to the compressed tissue between the platform surface 1450 and anvil 400. In addition, due to the curvature of the platform surface 1450, the platform surface 1450 may tend to squeeze the fabric radially outward as the fabric is compressed between the platform surface 1450 and the anvil 400 .
L Exemplary staple platform member with fabric hooking features and staple trigger bulkhead features [0141] In some conventional circular staplers, re
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59/71 Strokes of an actuated staple actuator may have a tendency to protrude distally from the platform surface of the staple head assembly after the staple head assembly has been actuated. In some cases, these protruding staple trigger features may be sharp or have some other structural configuration that may tend to damage the fabric. This risk of tissue damage from the exposed staple trigger features may be present immediately after the staple head assembly is triggered (that is, the exposed staple trigger features can damage the tissue that is still compressed between the anvil and the clamp platform). In addition, there may be a risk that such staple trigger features will bump into tissue as the actuated staple head assembly is removed from the patient's colon C or other anatomical structure. Therefore, it may be desirable to modify the staple head assembly platform to prevent any features of an actuated staple driver from protruding distally from the platform surface after the staple head assembly has been actuated.
[0142] Figure 29 shows another exemplary alternative platform member set 1500 that can readily be incorporated into the staple head assembly 300 instead of platform member 320. The platform member 1500 of this example comprises a platform surface 1510 which defines a plurality of staple openings 1524. The platform surface 1510 includes zigzag walls 1512 and an inner annular portion 1514. Zigzag walls 1512 partially surround the ends of the staple openings 1424. The inner annular portion 1514 is configured to function similarly to annular wall 592, so that the inner annular portion 1514 is configured to compress a partially annular region of tissue against anvil 400, thereby providing
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60/71 assistance for the cutting edge of a knife member to shear the fabric. The platform surface 1510 further defines an internal recess 1540 next to each internal clamp opening 1524 and an external recess 1544 that is spaced from each internal clamp opening 1524. Similarly, the platform surface 1510 additionally defines an internal recess 1542 next to each external clamp opening 1524 and an external recess 1546 that is spaced from each external clamp opening 1524. The external recesses 1544, 1546 are contiguous with a rounded outer edge 1520 of the platform member 1500.
[0143] The platform member 1550 also includes a set of internal walls 1550 that separate each internal clamp opening 1524 from the corresponding recesses 1540, 1544. The internal walls 1550 are lowered in relation to the platform surface 1510 but project slightly in relation to to the recesses 1540, 1544. Similarly, a set of walls 1550 separates each external clamp opening 1524 from the corresponding recesses 1542, 1546. Again, the internal walls 1550 are lowered in relation to the platform surface 1510 but project slightly in relation to to the recesses 1542, 1546.
[0144] It should be understood that the combination of the zigzag walls 1512 and the recesses 1540, 1542, 1544, 1546 can provide fabric engagement effects similar to those described above, including reducing the total pressure that would otherwise be applied to the fabric compressed against the platform member 1500, accentuating the tightness of the fabric that is compressed against the platform member 1500, and / or providing other tissue engaging effects.
[0145] It should also be understood that zigzag walls 1512 and walls 1550 can cooperate to protect the staple actuators 1502. In particular, as shown
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61/71 shown in Figure 29, all structural features of the dispensing staple actuators 1502 are lowered in relation to the zigzag walls 1512 and the walls 1550 in this example. Zigzag walls 1512 and walls 1550 will thus prevent staple actuators 1502 from bumping or otherwise damaging the tissue after staple actuators 1502 have reached the fully implanted position shown in Figure 29.
Ill · Exemplary combinations [0146] The following examples refer to several non-exhaustive ways in which the teachings of the present invention can be combined or applied. It should be understood that the following examples are not intended to restrict coverage of any claims that may be made at any time in this application or in deposits subsequent to this application. No rights waiver is intended. The following examples are provided for illustrative purposes only. It is contemplated that the various teachings of the present invention can be arranged and applied in several other ways. It is also contemplated that some variations may omit certain features referred to in the examples below. Therefore, none of the aspects or resources referred to below should be considered critical, unless explicitly stated otherwise at a later date by the inventors or by a successor of interest to the inventors. If any claims are made in this application or in subsequent filings related to this application that include additional features in addition to those listed below, it is not assumed that these additional features have been added for any reason related to patentability. Example 1 [0147] An apparatus comprising: (a) a body; (b) a drive shaft assembly that extends distally from the
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62/71 body assembly, the drive shaft assembly having a distal end; (c) a stapling head assembly located at the distal end of the drive shaft assembly, the stapling head assembly comprising: (i) an annular platform member defining an inner diameter and an outer diameter, the platform member comprises:
(A) a first platform surface, the first platform surface having a curved profile defined by a curve extending from the inner diameter of the platform member to the outer diameter of the platform member, (B) an external annular assembly of clamp openings, and (C) an internal annular set of clamp openings, (ii) a plurality of clamps, and (iii) an operable actuator for driving the clamps through the clamp openings; and (d) an anvil, the anvil being operable to compress the tissue against the first platform surface.
Example 2 [0148] The apparatus of Example 1 in which the curve has a more distal region located between the inner diameter and the outer diameter.
Example 3 [0149] The apparatus of Example 2 in which the region furthest from the curve is located closer to the inner diameter than the outer diameter.
Example 4 [0150] The apparatus of any one or more of Examples 1 to 3 wherein the platform member additionally comprises a second platform surface, the second platform surface being lowered in relation to the first platform surface.
Example 5
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63/71 [0151] The apparatus of Example 4 in which the platform member additionally comprises a plurality of spacing resources that project from the second platform surface, the first platform surface being located on the spacing resources.
Example 6 [0152] The apparatus of Example 5 in which the distance features comprise walls that have a zigzag shape. Example 7 [0153] The apparatus of any one or more of Examples 5 to 6 wherein an inner portion of each spacer partly surrounds one end of a corresponding staple opening of the internal annular matrix of staple openings, one portion being The outer part of each spacing feature partially surrounds one end of a corresponding clamp opening of the outer annular matrix of clamp openings.
Example 8 [0154] The apparatus of any one or more of Examples 5 to 7 which additionally comprises an inner annular wall extending upwardly from the second surface, the inner annular wall being located on the inner diameter of the platform member .
Example 9 [0155] The apparatus of Example 8 wherein a portion of the first surface and a distal edge of the inner annular wall are coplanar. Example 10 [0156] The apparatus of any one or more of Examples 8 to 9 in which the platform member defines an annular recess between the spacer features and the internal annular wall.
Example 11
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64/71 [0157] The apparatus of any one or more of Examples 8 to 10 wherein the inner annular wall has a distal edge, the distal edge of the annular wall being situated along the curve of the first platform surface.
Example 12 [0158] The apparatus of any one or more of Examples 4 to 11 in which the staple head assembly defines a longitudinal geometric axis, the second platform surface being oriented obliquely with respect to the longitudinal geometric axis.
Example 13 [0159] The apparatus of Example 12 wherein the second platform surface is obliquely oriented so that an outer portion of the second platform surface is positioned distally from an innermost portion of the platform surface, so that the second platform surface slopes proximally from the outermost portion towards the innermost portion.
Example 14 [0160] The apparatus of any one or more of Examples 1 to 13 wherein the platform member further comprises a second platform surface that extends along a first angular strip, the second platform surface being flat , the first platform surface extending along a second angular strip.
Example 15 [0161] The apparatus of Example 14 in which the drive shaft assembly has a curved region with an internal curve and an external curve, the first angular strip being angularly positioned to correspond to the external curve, the second angular band is angularly positioned to correspond to the interPetition curve 870190044679, of 05/13/2019, p. 107/124
65/71 na.
Example 16 [0162] An apparatus comprising: (a) a body; (b) a drive shaft assembly that extends distally from the body assembly, the drive shaft assembly having a distal end; (c) a stapling head assembly located at the distal end of the drive shaft assembly, the stapling head assembly defining a longitudinal geometric axis, the stapling head assembly comprising:
(i) an annular platform member defining an inner diameter and an outer diameter, the platform member comprising: (A) a platform surface, with a portion of the platform surface being obliquely oriented in relation to the longitudinal geometric axis so that the platform surface is inclined along a radially extending path, (B) an external annular matrix of clamp openings, and (C) an internal annular matrix of clamp openings, (ii) a plurality of clamps, and one (iii) an operable actuator for driving the clamps through the clamp openings; and (d) an anvil, the anvil being operable to compress the tissue against the first platform surface.
Example 17 [0163] The apparatus of Example 16 in which the platform surface is tilted so that the platform surface tilts proximally from an external region of the platform surface towards an internal region of the platform surface. Example 18 [0164] The apparatus of any one or more of Examples 16 to 17 wherein the platform member further comprises a distal surface positioned distally from the platform surface.
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Example 19 [0165] The apparatus of Example 18 in which the distal surface has a curved profile defined by a curve extending from the inner diameter of the platform member to the outer diameter of the platform member.
Example 20 [0166] A surgical stapling head assembly comprising: (a) an annular platform member defining an inner diameter and an outer diameter, the platform member comprising: (i) a first platform surface, being that the first platform surface has a curved profile defined by a curve extending from the inner diameter of the platform member to the outer diameter of the platform member, (ii) a second platform surface, with a portion of the surface The platform surface is oriented obliquely in relation to the longitudinal geometric axis so that the platform surface is inclined along a path that extends radially, (iii) an external annular matrix of clamp openings, and (iv) an internal annular matrix staple openings; (b) a plurality of clips; and (c) an operable actuator for driving the clamps through the clamp openings.
IV · Miscellaneous [0167] It should be understood that the above teachings can be readily combined with the teachings of US patent application No. [attorney document number END7975USNP.0637659], entitled Circular Surgical Stapler with Recessed Deck and Raised Circumferential Edges filed on the same date as this application, the disclosure of which is hereby incorporated by reference. Various suitable ways according to which the teachings of the invention and the teachings of US patent application no.
Petition 870190044679, of 05/13/2019, p. 109/124
67/71 proxy79 END7975USNP.0637659] can be combined will be evident to those skilled in the art.
[0168] It should be understood that the above teachings can be readily combined with the teachings of US patent application No. [attorney document number END7977USNP.0637664], entitled Staple Pocket Configurations for Circular Surgical Stapler, filed on the same date of this application, the disclosure of which is hereby incorporated by reference. Various suitable ways in which the teachings of the invention and the teachings of US patent application No. [attorney document number END7977USNP.0637662] can be combined will be apparent to those skilled in the art.
[0169] It should be understood that the above teachings can be readily combined with the teachings of US patent application No. [attorney document number END7978USNP.0637666], entitled Circular Surgical Stapler with Angularly Asymmetric Deck Features, filed in the same date of this application, the disclosure of which is hereby incorporated by reference. Various suitable ways in which the teachings of the invention and the teachings of US patent application No. [attorney document number END7978USNP.0637666] can be combined will be apparent to those skilled in the art.
[0170] It should also be understood that any one or more of the teachings, expressions, modalities, examples, etc. described here can be combined with any one or more of the other teachings, expressions, modalities, examples, etc. that are described here. The teachings, expressions, modalities, examples, etc. described above should therefore not be seen in isolation from each other. Various suitable ways in which the teachings of the present invention can be combined will become readily apparent to those skilled in the art in view of the teachings.
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68/71 of the present invention. These modifications and variations are intended to be included in the scope of the attached claims.
[0171] At least some of the teachings of the present invention can readily be combined with one or more of the teachings of US Patent No. 7,794,475, entitled Surgical Staples Having Compressible or Crushable Members for Securing Tissue Therein and Stapling Instruments for Deploying the Same, granted September 14, 2010, the disclosure of which is incorporated into the present invention, as a reference; US publication No. 2014/0151429, entitled Trans-Oral Circular Anvil Introduction System with Dilation Feature, published on June 5, 2014, the disclosure of which is hereby incorporated by reference; US publication No. 2014/0144968, entitled Surgical Staple with Integral Pledget for Tip Deflection, published on May 29, 2014, the disclosure of which is hereby incorporated by reference; US publication No. 2014/0158747, entitled Surgical Stapler with Varying Staple Widths along Different Circumferences, published on June 12, 2014, the disclosure of which is hereby incorporated by reference; US publication No. 2014/0144969, entitled Pivoting Anvil for Surgical Circular Stapler, published on May 29, 2014, the disclosure of which is hereby incorporated by reference; US publication No. 2014/0151430, entitled Circular Anvil Introduction System with Alignment Feature, published on June 5, 2014, the disclosure of which is hereby incorporated by reference; US publication No. 2014/0166717, entitled Circular Stapler with Selectable Motorized And Manual Control, Including a Control Ring, published on June 19, 2014, the disclosure of which is hereby incorporated by reference; US publication No. 2014/0166728, entitled Motor Driven Rotary Input Circular Stapler with Modular End Effector, published on June 19, 2014, the disclosure of which is hereby incorporated by reference; and / or US publication No. 2014/0166718, entitled Motor Driven Rotary Input
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69/71
Circular Stapler with Modular Flexible Shaft, published on June 19, 2014, the disclosure of which is hereby incorporated by reference. Various suitable ways in which such teachings can be combined will be evident to those skilled in the art.
[0172] It should be understood that any patent, publication, or other disclosure material taken as incorporated into the present invention for reference, in whole or in part, is incorporated into the present invention only insofar as the incorporated material does not conflict with the definitions, statements or other material disclosed in this disclosure. Accordingly, and to the extent necessary, the disclosure as explicitly presented herein replaces any conflicting material incorporated by reference to the present invention. Any material, or portion thereof, which is incorporated herein by reference, but which conflicts with the definitions, statements, or other disclosure materials contained herein, will be incorporated here only insofar as there is no conflict between the material embedded and existing disclosure material.
[0173] Versions of the devices described above may have application in conventional medical treatments and procedures conducted by a medical professional, as well as application in medical treatments and procedures assisted by robotics. As an example only, several teachings of the present invention can readily be incorporated into a robotic surgical system such as the DAVINCI ™ system by Intuitive Surgical, Inc., of Sunnyvale, California, USA.
[0174] The versions described above can be designed to be discarded after a single use or can be designed to be used multiple times. The versions can, in either or both cases, be reconditioned for reuse after
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70/71 at least one use. Reconditioning can include any combination of steps to disassemble the device, followed by cleaning or replacing specific parts and subsequent reassembly. Specifically, some versions of the device can be disassembled into any number of particular parts or parts of the device can be selectively replaced or removed in any combination. By cleaning and / or replacing specific parts, some versions of the device can be reassembled for subsequent use in a reconditioning facility or by a user immediately before a surgical procedure. Those skilled in the art will understand that the reconditioning of a device can use a variety of disassembly, cleaning / replacement and reassembly techniques. The use of these techniques, as well as the resulting refurbished device, are all within the scope of this application.
[0175] Just as an example, the versions described here can be sterilized before and / or after a procedure. In a sterilization technique, the device is placed in a closed and sealed container, such as a plastic or TYVEK bag. The container and the device can then be placed in a radiation field, such as gamma radiation, X-rays or high-energy electrons, which can penetrate the container. Radiation can kill bacteria on the device and the container. The sterile device can then be stored in a sterile container for later use. The device can also be sterilized using any other known technique, including, but not limited to, beta or gamma radiation, ethylene oxide or water vapor.
[0176] Having shown and described various modalities of the present invention, other adaptations of the methods and systems described in the present invention can be made by means of modifications
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71/71 suitable by a person skilled in the art without departing from the scope of the present invention. Several of these possible modifications have been mentioned, and others will be evident to those skilled in the art. For example, the examples, modalities, geometry, materials, dimensions, proportions, steps and the like discussed above are illustrative and are not mandatory. Consequently, the scope of the present invention must be considered in accordance with the terms of the following claims and it is understood that it is not limited to the details of the structure and operation shown and described in the specification and drawings.

权利要求:
Claims (20)
[1]
1. Apparatus characterized by the fact that it comprises:
(a) a body;
(b) a drive shaft assembly that extends distally from the body, the drive shaft assembly having a distal end;
(c) a stapling head assembly located at the distal end of the drive shaft assembly, the stapling head assembly comprising:
(i) an annular platform member defining an inner diameter and an outer diameter, the platform member comprising:
(A) a first platform surface, the first platform surface having a curved profile defined by a curve that extends from the inner diameter of the platform member to the outer diameter of the platform member, (B) a matrix external annular clamp openings, and (C) an internal annular array of clamp openings, (ii) a plurality of clamps, and (iii) an operable actuator for driving the clamps through the clamp openings; and (d) an anvil, the anvil being operable to compress the tissue against the first platform surface.
[2]
2. Apparatus, according to claim 1, characterized by the fact that the curve has a more distal region located between the inner diameter and the outer diameter.
[3]
3. Apparatus according to claim 2, characterized by the fact that the region furthest from the curve is located closer to the inner diameter than the outer diameter.
[4]
4. Apparatus according to claim 1, characterized
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2/5 by the fact that the platform member additionally comprises a second platform surface, the second platform surface being lowered in relation to the first platform surface.
[5]
5. Apparatus according to claim 4, characterized by the fact that the platform member additionally comprises a plurality of spacing features that protrude from the second platform surface, the first platform surface being located on the distancing.
[6]
6. Apparatus according to claim 5, characterized by the fact that the distance features comprise walls that have a zigzag shape.
[7]
7. Apparatus according to claim 5, characterized by the fact that an inner portion of each spacer partly surrounds one end of a corresponding clamp opening of the internal annular matrix of clamp openings, with an outer portion of each Spacing feature partially surrounds one end of a corresponding clamp opening of the external annular matrix of clamp openings.
[8]
Apparatus according to claim 5, characterized in that it additionally comprises an internal annular wall extending upwardly from the second surface, the internal annular wall being located on the inner diameter of the platform member.
[9]
Apparatus according to claim 8, characterized in that a portion of the first surface and a distal edge of the inner annular wall are coplanar.
[10]
10. Apparatus according to claim 8, characterized
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3/5 due to the fact that the platform member defines an annular recess between the spacer features and the internal annular wall.
[11]
Apparatus according to claim 8, characterized in that the inner annular wall has a distal edge, the distal edge of the annular wall being located along the curve of the first platform surface.
[12]
12. Apparatus according to claim 4, characterized by the fact that the stapling head assembly defines a longitudinal geometric axis, the second platform surface being obliquely oriented in relation to the longitudinal geometric axis.
[13]
13. Apparatus according to claim 12, characterized in that the second platform surface is obliquely oriented so that an outer portion of the second platform surface is positioned distally from an innermost portion of the platform surface , so that the second platform surface slopes proximally from the outermost portion towards the innermost portion.
[14]
14. Apparatus according to claim 1, characterized by the fact that the platform member additionally comprises a second platform surface that extends along a first angular strip, the second platform surface being flat, being that the first platform surface extends along a second angular strip.
[15]
15. Apparatus according to claim 14, characterized by the fact that the drive shaft assembly has a curved region with an internal curve and an external curve, the first angular band being angularly positioned to correspond to the external curve, the second angular band being angularly positioned to correspond to the internal curve.
[16]
16. Device characterized by the fact that it comprises:
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4/5 (a) a body;
(b) a drive shaft assembly that extends distally from the body, the drive shaft assembly having a distal end;
(c) a stapling head assembly located at the distal end of the drive shaft assembly, the stapling head assembly defining a longitudinal geometric axis, the stapling head assembly comprising:
(i) an annular platform member defining an inner diameter and an outer diameter, the platform member comprising:
(A) a platform surface, with a portion of the platform surface being oriented obliquely in relation to the longitudinal geometric axis so that the platform surface is inclined along a radially extending path, (B) an annular matrix external clamp openings, and (C) an internal ring matrix of clamp openings, (ii) a plurality of clamps, and (iii) an operable actuator for driving the clamps through the clamp openings; and (d) an anvil, the anvil being operable to compress the tissue against the first platform surface.
[17]
17. Apparatus according to claim 16, characterized in that the platform surface is inclined so that the platform surface tilts proximally from an external region of the platform surface towards an internal region of the surface platform.
[18]
18. Apparatus according to claim 16, characterized by the fact that the platform member comprises additional
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5/5 finally a distal surface positioned distally in relation to the platform surface.
[19]
19. Apparatus according to claim 18, characterized by the fact that the distal surface has a curved profile defined by a curve that extends from the inner diameter of the platform member to the outer diameter of the platform member.
[20]
20. Surgical stapling head set characterized by the fact that it comprises:
(a) an annular platform member defining an inner diameter and an outer diameter, the platform member comprising:
(i) a first platform surface, the first platform surface having a curved profile defined by a curve that extends from the inner diameter of the platform member to the outer diameter of the platform member, (ii) a second platform surface, a portion of the platform surface being obliquely oriented in relation to the longitudinal geometric axis so that the platform surface is inclined along a radially extending path, (iii) an external annular matrix of openings staples, and (iv) an internal ring matrix of staple openings;
(b) a plurality of clips; and (c) an operable actuator for driving the clamps through the clamp openings.

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法律状态:
2021-10-05| B350| Update of information on the portal [chapter 15.35 patent gazette]|

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2022-02-15| B06W| Patent application suspended after preliminary examination (for patents with searches from other patent authorities) chapter 6.23 patent gazette]|

优先权:

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申请号 | 申请日 | 专利标题

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US15/350,593|US10542981B2|2016-11-14|2016-11-14|Atraumatic stapling head features for circular surgical stapler|

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PCT/US2017/035113|WO2018089051A1|2016-11-14|2017-05-31|Atraumatic stapling head features for circular surgical stapler|

---