US20140239047A1 - Adherence concepts for non-woven absorbable felt buttresses - Google Patents
Adherence concepts for non-woven absorbable felt buttresses Download PDFInfo
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- US20140239047A1 US20140239047A1 US14/172,036 US201414172036A US2014239047A1 US 20140239047 A1 US20140239047 A1 US 20140239047A1 US 201414172036 A US201414172036 A US 201414172036A US 2014239047 A1 US2014239047 A1 US 2014239047A1
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- Prior art keywords
- assembly
- surgical
- anvil
- cartridge
- surgical buttress
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B17/07207—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously the staples being applied sequentially
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B17/07292—Reinforcements for staple line, e.g. pledgets
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00004—(bio)absorbable, (bio)resorbable, resorptive
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B2017/00477—Coupling
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B2017/07214—Stapler heads
- A61B2017/07257—Stapler heads characterised by its anvil
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/068—Surgical staplers, e.g. containing multiple staples or clamps
- A61B17/072—Surgical staplers, e.g. containing multiple staples or clamps for applying a row of staples in a single action, e.g. the staples being applied simultaneously
- A61B2017/07214—Stapler heads
- A61B2017/07271—Stapler heads characterised by its cartridge
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49908—Joining by deforming
Abstract
A loading unit for use with a surgical stapling apparatus including a tool assembly and a surgical buttress. The tool assembly includes: a cartridge assembly including a staple cartridge having a tissue facing surface, staple retaining pockets having a plurality of surgical fasteners therein, and a knife slot; and an anvil assembly including an anvil plate having a tissue facing surface defining staple forming pockets and a knife slot. The surgical buttress is attached to the tissue facing surface of at least one of the cartridge assembly or the anvil assembly, and conforms to the tissue facing surface such that the surgical buttress is deformed locally into the staple retaining pockets and the knife slot of the cartridge assembly or the staple forming pockets and the knife slot of the anvil assembly to which the surgical buttress is attached.
Description
- The present application claims the benefit of, and priority to, U.S. Provisional Application No. 61/770,855, filed on Feb. 28, 2013 the entire disclosure of which is incorporated by reference herein.
- The present application relates to U.S. patent application Ser. No. 13/729,144, filed on Dec. 28, 2012, now U.S. Pat. No. 8,631,989, which is a Continuation Application which claims the benefit of and priority to U.S. application Ser. No. 13/097,194, filed on Apr. 29, 2011, now U.S. Pat. No. 8,365,972, which is a Continuation-In-Part Application which claims the benefit of and priority to U.S. application Ser. No. 12/414,943, filed on Mar. 31, 2009, now U.S. Pat. No. 8,011,550, the entire content of each of which is incorporated herein by reference.
- 1. Technical Field
- The present disclosure relates to a surgical apparatus having a buttress material incorporated therewith. More particularly, the present disclosure relates to a surgical stapling apparatus including a detachable surgical buttress and/or an endoscopic surgical stapling apparatus that includes a detachable surgical buttress.
- 2. Background of Related Art
- Surgical devices for grasping or clamping tissue between opposing jaw structure and then joining tissue by surgical fasteners are well known in the art. In some instruments a knife is provided to cut the tissue which has been joined by the fasteners. The fasteners are typically in the form of surgical staples but two-part polymeric fasteners can also be utilized.
- Instruments for this purpose can include two elongated jaw members which are respectively used to capture or clamp tissue. In certain surgical staplers, one of the jaw members carries a staple cartridge which houses a plurality of staples arranged in at least two lateral rows while the other jaw member has an anvil that defines a surface for forming the staple legs as the staples are driven from the staple cartridge. The stapling operation is effected by cam members that travel longitudinally through the staple cartridge, with the cam members acting upon staple pushers to sequentially eject the staples from the staple cartridge. A knife can travel between the staple rows to longitudinally cut and/or open the stapled tissue between the rows of staples. Such instruments are disclosed, for example, in U.S. Pat. No. 3,079,606 and U.S. Pat. No. 3,490,675.
- Another stapler disclosed in U.S. Pat. No. 3,499,591 also applies a double row of staples on each side of the incision. This patent discloses a surgical stapler that has a disposable loading unit in which a cam member moves through an elongate guide path between two sets of staggered staple carrying grooves. Staple drive members are located within the grooves and are positioned in such a manner so as to be contacted by the longitudinally moving cam member to effect ejection of the staples from the staple cartridge of the disposable loading unit. Other examples of such staplers are disclosed in U.S. Pat. Nos. 4,429,695 and 5,065,929.
- Each of the instruments described above is designed for use in surgical procedures in which surgeons have direct manual access to the operative site. However, in endoscopic or laparoscopic procedures, surgery is performed through a small incision or through a narrow cannula inserted through small entrance wounds in the skin. In order to address the specific needs of endoscopic and/or laparoscopic surgical procedures, endoscopic surgical stapling devices have been developed and are disclosed in, for example, U.S. Pat. No. 5,040,715 (Green, et al.); U.S. Pat. No. 5,307,976 (Olson, et al.); U.S. Pat. No. 5,312,023 (Green, et al.); U.S. Pat. No. 5,318,221 (Green, et al.); U.S. Pat. No. 5,326,013 (Green, et al.); U.S. Pat. No. 5,332,142 (Robinson, et al.); and U.S. Pat. No. 6,241,139 (Milliman et al.), the entire contents of each of which are hereby incorporated herein by reference.
- Tyco Healthcare Group, LP, the assignee of the present application, has manufactured and marketed endoscopic stapling instruments, such as the Multifire ENDO GIA™. 30 and Multifire ENDO GIA™. 60 instruments, for a number of years. These instruments include a surgical stapling apparatus and a loading unit. Typically, the loading unit is attached to the apparatus immediately prior to surgery. After use, the loading unit can be removed from the apparatus and a new loading unit can be fastened to the apparatus to perform additional stapling and/or cutting operations. These instruments have provided significant clinical benefits. Nonetheless, improvements to these instruments are still desirable.
- When stapling relatively thin or fragile tissues, it is important to effectively seal the staple line against air or fluid leakage. Additionally, it is often necessary to reinforce the staple line against the tissue to prevent tears in the tissue or pulling of the staples through the tissue. One method of preventing tears or pull through involves the placement of a biocompatible fabric reinforcing material, or “buttress” material, between the staple and the underlying tissue. In this method, a layer of buttress material is placed against the tissue and the tissue is stapled in conventional manner. In another method, the buttress material is positioned on the stapling instrument itself prior to stapling the tissue. An exemplary example of this is disclosed in U.S. Pat. No. 5,542,594 to McKean et al., the entire content of which is incorporated herein by reference. In McKean et al., a tube of buttress material is slipped over the jaw of the stapler. The stapler is then actuated to staple the subject tissue and secure the buttress material between the tissue and staple line to reinforce the tissue and staple line.
- Buttress materials which are either pre-loaded or are an after-market add-on, for endomechanical or open mechanical surgical stapling apparatus, may shift in position relative to a stapler reload cartridge assembly and anvil assembly to which they are attached during grasping and manipulation of tissue by the surgical stapling apparatus. If the shifting of the buttress material is pronounced and is not corrected by the surgeon before firing the surgical stapling apparatus, then staples may form outside the perimeter or width of the buttress material thereby reducing the benefits of having the entire staple line reinforced by the buttress material.
- Accordingly, a need exists to systems and methods for securing a buttress material to the tissue contacting/facing surface of a cartridge assembly and/or anvil assembly of a surgical stapling apparatus, whereby the buttress material remains secured in place over top of the staple retaining slots and/or staple forming pockets, along an entire length thereof.
- Additionally, a need exists to design or modify the mechanical and physical properties of the buttress material to reduce the impact of material shifting on the stapler reload cartridge assembly and anvil assembly.
- In accordance with the present disclosure a surgical stapling apparatus is provided including a housing; a handle supported by the housing; an elongated body extending distally from the housing; and a tool assembly at the distal end of the elongated body. The tool assembly has a cartridge assembly including a staple cartridge having a tissue facing surface, a plurality of staple retaining pockets and a knife slot formed in the tissue facing surface thereof. The tool assembly also has a plurality of surgical fasteners loaded one each in the staple retaining pockets. The tool assembly additionally has an anvil assembly in juxtaposed relation to the cartridge assembly, the anvil assembly including an anvil plate having a tissue facing surface defining a plurality of staple forming pockets and a knife slot therein, at least one of the cartridge assembly or the anvil assembly being movable in relation to the other of the cartridge assembly and the anvil assembly.
- The surgical stapling apparatus further includes a surgical buttress releasably secured to a tissue contacting surface of at least one of the anvil plate and the staple cartridge, wherein each surgical buttress is secured to the at least one of the anvil assembly and the cartridge assembly by at least one anchor; a release assembly associated with the at least one of the anvil assembly and the cartridge assembly; and a drive assembly slidably translatable through the tool assembly from a proximal position to a distal position, wherein the drive assembly actuates the release assembly to thereby release the anchor and to free the surgical buttress from the at least one of the anvil assembly and cartridge assembly.
- The release assembly may grip the at least one anchor prior to an actuation of the drive assembly.
- The at least one of the anvil assembly and the cartridge assembly may define a side slot for receiving an end of the at least one anchor therein.
- The release assembly may include a first bar extending across the longitudinal slot prior to an actuation of the drive assembly; and a second bar, connected to and actuatable by the first bar, having an end extending at least partially into the side slot, prior to an actuation of the drive assembly.
- In use, as the drive assembly is advanced to the distal position, the drive assembly may actuate the first bar of the release assembly which in turn may actuate the second bar of the release assembly to release the anchor disposed within the side slot.
- Each of the anvil assembly and the cartridge assembly may include a release assembly. Each of the anvil assembly and the cartridge assembly may define a side slot for receiving the anchor of each surgical buttress.
- Each release assembly may include a first bar extending across the longitudinal slot prior to an actuation of the drive assembly; and a second bar, connected to and actuatable by the first bar, having an end extending at least partially into the side slot, prior to an actuation of the drive assembly. In use, as the drive assembly is advanced to the distal position, the drive assembly may actuate the first bar of each release assembly which in turn may actuate the second bar of each release assembly to release the anchor disposed within the each side slot.
- At least one of the anvil assembly and the cartridge assembly may include a constricting, open-ended, side slot configured to grip an end of the anchor, and wherein the release assembly may push the end of the anchor out of the side slot, upon a distal advancement of the drive assembly.
- The release assembly may include a pusher that is in operative association with the side slot retaining the end of the anchor. The pusher may be actuatable by a distally advancing drive member to push the end of the anchor out of the side slot.
- The pusher of the release assembly may be one of pivotally connected to and slidably supported in at least one of the anvil assembly and the cartridge assembly.
- The anchor may be a suture engaging the surgical buttress and the at least one of the cartridge assembly and the anvil assembly. The anchor may be an extension of the surgical buttress and engages the at least one of the cartridge assembly and the anvil assembly.
- According to another aspect of the present application, a loading unit for use with a surgical stapling apparatus is provided and includes a tool assembly having a cartridge assembly including a cartridge having a plurality of surgical fasteners therein, and an anvil assembly, at least one of the cartridge assembly and the anvil assembly being movable in relation to the other of the cartridge assembly and anvil assembly, wherein the anvil assembly includes an anvil plate and, wherein each of the anvil plate and the staple cartridge define an elongate longitudinal slot; a surgical buttress releasably secured to a tissue contacting surface of at least one of the anvil plate and the staple cartridge, wherein each surgical buttress is secured to the at least one of the anvil assembly and the cartridge assembly by at least one anchor; a release assembly associated with the at least one of the anvil assembly and the cartridge assembly; and a drive assembly slidably translatable through the tool assembly from a proximal position to a distal position, the drive assembly actuating the release assembly to thereby release the anchor to free the surgical buttress from the at least one of the anvil assembly and cartridge assembly.
- The release assembly may grip the at least one anchor prior to an actuation of the drive assembly.
- At least one of the anvil assembly and the cartridge assembly may define a side slot for receiving an end of the at least one anchor therein.
- The release assembly may include a first bar extending across the longitudinal slot prior to an actuation of the drive assembly; and a second bar, connected to and actuatable by the first bar, having an end extending at least partially into the side slot, prior to an actuation of the drive assembly.
- In use, as the drive assembly is advanced to the distal position, drive assembly actuates the first bar of the release assembly which in turn actuates the second bar of the release assembly to release the grip on the end of the at least one anchor disposed within the side slot.
- Each of the anvil assembly and the cartridge assembly may include a release assembly.
- At least one of the anvil assembly and the cartridge assembly may include a constricting, open-ended, side slot configured to grip an end of the anchor disposed therein, and wherein the release assembly may push the end of the anchor out of the side slot, upon a distal advancement of the drive assembly.
- According to a further aspect of the present disclosure, a surgical stapling apparatus is provided and includes a housing; a handle supported by the housing; an elongated body extending distally from the housing; and a tool assembly at the distal end of the elongated body. The tool assembly includes a cartridge assembly including a cartridge having a plurality of surgical fasteners therein, and an anvil assembly in juxtaposed relation to the cartridge assembly, at least one of the cartridge assembly and anvil assembly being movable in relation to the other of the cartridge assembly and anvil assembly. The anvil assembly includes an anvil plate defining a pair of opposed distal side slots for receiving an end of an anchor and a pair of opposed proximal side slots for receiving an end of an anchor. The anvil plate includes at least one of the following: at least one of the pair of distal side slots is keyhole-shaped; and at least one of the pair of proximal side slots is keyhole-shaped. The surgical stapling apparatus further includes a surgical buttress releasably secured to a tissue contacting surface of at least one of the anvil plate and the staple cartridge, wherein each surgical buttress is secured to the at least one of the anvil assembly and the cartridge assembly by at least one anchor; a release assembly associated with the at least one of the anvil assembly and the cartridge assembly; and a drive assembly slidably translatable through the tool assembly from a proximal position to a distal position, the drive assembly actuating the release assembly to thereby release the anchor and to free the surgical buttress from the at least one of the anvil assembly and cartridge assembly.
- According to yet another aspect of the present disclosure, a loading unit for use with a surgical stapling apparatus is provided. The loading unit comprises a tool assembly having a cartridge assembly including a cartridge having a plurality of surgical fasteners therein, and an anvil assembly in juxtaposed relation to the cartridge assembly, at least one of the cartridge assembly and anvil assembly being movable in relation to the other of the cartridge assembly and anvil assembly. The anvil assembly includes an anvil plate defining a pair of opposed distal side slots for receiving an end of an anchor and a pair of opposed proximal side slots for receiving an end of an anchor. The anvil plate includes at least one of the following: at least one of the pair of distal side slots is keyhole-shaped; and at least one of the pair of proximal side slots is keyhole-shaped. The loading unit further includes a surgical buttress releasably secured to a tissue contacting surface of at least one of the anvil plate and the staple cartridge, wherein each surgical buttress is secured to the at least one of the anvil assembly and the cartridge assembly by at least one anchor; a release assembly associated with the at least one of the anvil assembly and the cartridge assembly; and a drive assembly slidably translatable through the tool assembly from a proximal position to a distal position, the drive assembly actuating the release assembly to thereby release the anchor to free the surgical buttress from the at least one of the anvil assembly and cartridge assembly.
- Each of the anvil plate and the staple cartridge may define an elongate longitudinal slot.
- The cartridge assembly may define at least one side slot for receiving an end of the at least one anchor therein.
- Each of the anvil assembly and the cartridge assembly may include a release assembly.
- Each of the anvil assembly and the cartridge assembly may define a side slot for receiving the anchor associated with each surgical buttress.
- At least one of the anvil assembly and the cartridge assembly may include a keyhole-shaped side slot.
- The anchor may be a suture that is in engagement with the surgical buttress and the at least one of the cartridge assembly and the anvil assembly.
- Additional advantages will become apparent from the description which follows, taken in conjunction with the accompanying drawings.
- The present disclosure will be further described with reference to the accompanying drawings, wherein like reference numerals refer to like parts in the several views, and wherein:
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FIG. 1 is a perspective view of a surgical stapling apparatus according to an embodiment of the present disclosure; -
FIG. 2 is a top, perspective view, with parts separated, of a distal end of a loading unit of the surgical stapling apparatus ofFIG. 1 ; -
FIG. 2A is an enlarged perspective view of a distal end of an anvil assembly of the loading unit illustrating a surgical anvil buttress operatively secured to a tissue contacting surface thereof; -
FIG. 2B is an enlarged perspective view of a cartridge assembly of the loading unit illustrating a surgical cartridge buttress secured to a tissue contacting surface thereof; -
FIG. 3 is a top, perspective view of a distal end of an anvil assembly of the loading unit including a suture release assembly according to an embodiment of the present disclosure, shown in an open configuration; -
FIG. 4 is a top, perspective view of the anvil assembly ofFIG. 3 , illustrating the parts of the suture release assembly thereof separated; -
FIG. 5 is a bottom, perspective view of the anvil assembly ofFIGS. 3 and 4 ; -
FIG. 6 is a top, plan view of the anvil assembly ofFIGS. 3-5 , illustrating the suture release assembly thereof in the closed configuration; -
FIG. 7 is a top, plan view of the anvil assembly ofFIG. 6 , with a retainer removed therefrom; -
FIG. 8 is a top, plan view of the anvil assembly ofFIGS. 3-7 , illustrating the suture release assembly thereof in the open configuration; -
FIG. 9 is a top, plan view of the anvil assembly ofFIG. 8 , with a retainer removed therefrom; -
FIG. 10 is a top, perspective view of a distal end of a cartridge assembly of the DLU including a suture release assembly according to an embodiment of the present disclosure; -
FIG. 11 is a top, perspective view of the cartridge assembly ofFIG. 10 , illustrating the parts of the suture release assembly thereof separated; -
FIG. 12 is a bottom, perspective view of a distal end of the cartridge assembly ofFIGS. 10 and 11 ; -
FIG. 13 is a top, plan view of the cartridge assembly ofFIGS. 10-12 , illustrating the suture release assembly thereof in the closed configuration; -
FIG. 14 is a top, plan view of the cartridge assembly ofFIGS. 10-13 , illustrating the suture release assembly thereof in the open configuration; -
FIG. 15 is a perspective view of a distal end of a loading unit including suture release assemblies according to another embodiment of the present disclosure; -
FIG. 16 is an enlarged view of the indicated area of detail ofFIG. 15 ; -
FIG. 17 is a top, perspective view of a distal end of an anvil assembly (with an anvil cover removed), illustrating a suture release assembly thereof in an actuated configuration; -
FIG. 18 is a top, perspective view of the distal end of the anvil assembly ofFIG. 17 , illustrating the parts of the suture release assembly thereof separated; -
FIG. 19 is a top, plan view of the anvil assembly ofFIGS. 17 and 18 , illustrating the suture release assembly thereof in an unactuated configuration; -
FIG. 20 is a top, plan view of the anvil assembly ofFIGS. 17-19 , illustrating the suture release assembly thereof in an actuated configuration; -
FIG. 21 is a bottom, perspective view of a distal end of a cartridge assembly of the DLU ofFIG. 15 , illustrating a suture release assembly thereof separated therefrom; -
FIG. 22 is a top, perspective view of the suture release assembly ofFIG. 21 ; -
FIG. 23 is a bottom, perspective view, with parts separated, of the suture release assembly ofFIGS. 21 and 22 ; -
FIG. 24 is a top, plan view of the suture release assembly ofFIGS. 21-23 , illustrating the suture release assembly thereof in an unactuated configuration; -
FIG. 25 is a top, plan view of the suture release assembly ofFIGS. 21-24 , illustrating the suture release assembly thereof in an actuated configuration; -
FIG. 26 is a top, plan view of a distal end of an anvil assembly of a loading unit including a suture release assembly according to yet another embodiment of the present disclosure; -
FIG. 27 is a top, perspective view, with parts separated, of the distal end of the anvil assembly ofFIG. 26 ; -
FIG. 28 is a top, plan view of the distal end of the anvil assembly ofFIGS. 26 and 27 , illustrating the suture release assembly thereof in an unactuated configuration; -
FIG. 29 is a top, plan view of the distal end of the anvil assembly ofFIGS. 26-28 , illustrating the suture release assembly thereof in an actuated configuration; -
FIG. 30 is a top, plan view of a distal end of an anvil assembly of a loading unit including a suture release assembly according to still another embodiment of the present disclosure, illustrating the suture release assembly thereof in an unactuated configuration; -
FIG. 31 is a top, plan view of the distal end of the anvil assembly ofFIG. 30 , illustrating the suture release assembly thereof in an actuated configuration; -
FIG. 32 is a top, perspective view of a distal end of a cartridge assembly of a loading unit including a suture release assembly according to a further embodiment of the present disclosure; -
FIG. 33 is a top, perspective view of the suture release assembly ofFIG. 32 ; -
FIG. 34 is a bottom, perspective view of the suture release assembly ofFIGS. 32 and 33 ; -
FIG. 35 is a bottom, perspective view, with parts separated, of the suture release assembly ofFIGS. 32-34 ; -
FIG. 36 is a top, perspective view, with parts separated, of the suture release assembly ofFIGS. 32-35 ; -
FIG. 37 is a top, plan view of the suture release assembly ofFIGS. 32-36 , illustrating the suture release assembly in an unactuated configuration; -
FIG. 38 is a top, plan view of the suture release assembly ofFIGS. 32-37 , illustrating the suture release assembly in an actuated configuration; -
FIG. 39 is a rear, perspective view, with parts separated of an anvil assembly according to another embodiment of the present disclosure; -
FIG. 40 is a top, plan view of a distal end of the anvil assembly ofFIG. 39 (with an anvil cover removed therefrom), illustrating a suture release assembly according to another embodiment of the present disclosure; -
FIG. 41 is a bottom, plan view of an anvil plate of the anvil assembly ofFIG. 39 ; -
FIG. 42 is a top, plan view of the anvil plate ofFIG. 41 ; -
FIG. 43 is an enlarged view of the indicated area of detail ofFIG. 42 ; -
FIG. 44 is an enlarged view of the indicated area of detail ofFIG. 42 ; -
FIG. 45 is a top, plan view of an anvil cover of the anvil assembly ofFIG. 39 ; -
FIG. 46 is an enlarged view of the indicated area of detail ofFIG. 45 ; -
FIG. 47 is an enlarged view of the indicated area of detail ofFIG. 45 showing a different embodiment of a suture receiving slot; -
FIG. 48 is an enlarged view of the indicated area of detail ofFIG. 45 showing a different embodiment of a suture receiving slot; -
FIG. 49 is an enlarged view of the indicated area of detail ofFIG. 45 showing a different embodiment of a suture receiving slot; -
FIG. 50 is a cross-sectional view of the indicated area of detail ofFIG. 45 , as taken through line 50-50 ofFIG. 49 ; -
FIG. 51 is a transverse, cross-sectional schematic illustration of a cartridge assembly including a surgical buttress overlying a tissue contacting/facing surface thereof; and -
FIG. 52 is a transverse, cross-sectional schematic illustration of an anvil assembly including a surgical buttress overlying a tissue contacting/facing surface thereof. - Embodiments of the presently disclosed surgical stapling apparatus and loading unit will now be described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views.
- In the drawings and in the description that follows, the term “proximal”, as is traditional, will refer to the end of the stapling apparatus which is closest to the operator, while the term “distal” will refer to the end of the apparatus which is furthest from the operator.
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FIG. 1 shows a surgical apparatus, e.g., surgical stapling apparatus, generally referred to as 10. In the interest of brevity, this disclosure will focus primarily on to the tool assembly of thesurgical stapling apparatus 10. A detailed discussion of the remaining components and method of use ofsurgical stapling apparatus 10 is disclosed in U.S. Pat. No. 6,241,139, the disclosure of which is hereby incorporated by reference herein. -
Surgical stapling apparatus 10 is an endoscopic apparatus and includes ahandle assembly 12 and anelongated body 14 extending fromhandle assembly 12. Aloading unit 16 is releasably secured to the distal end ofelongated body 14. Furthermore, the present disclosure contemplates surgical stapling apparatus that have a replaceable cartridge that is received in the jaws of the apparatus. -
Loading unit 16 includes atool assembly 17 having acartridge assembly 18 housing a plurality of surgical fasteners or staples 84 (seeFIG. 2 ) and ananvil assembly 20 secured in juxtaposed relation relative tocartridge assembly 18, whereinanvil assembly 20 andcartridge assembly 18 are moveable to or away from one another to close oropen tool assembly 17. As shown herein,loading unit 16 is configured to apply six (6) linear rows of staples, in loading units measuring from about 30 mm to about 60 mm in length. Loading units for applying any number of rows of staples, having staple pockets arranged in various patterns and/or loading units and end effectors having any other lengths, e.g., 45 mm, are also envisioned. Handleassembly 12 includes astationary handle member 22, amovable handle member 24, and abarrel portion 26. - A
rotatable member 28 is mounted on the forward end ofbarrel portion 26 to facilitate rotation ofelongated body 14 and attachedloading unit 16 with respect to handleassembly 12. Anarticulation lever 30 is also mounted on the forward end ofbarrel portion 26 adjacentrotatable member 28 to facilitate articulation oftool assembly 17. Preferably, a pair ofknobs 32 are movably positioned alongbarrel portion 26.Knobs 32 are advanced distally to approximate or close cartridge and/oranvil assembly anvil assembly -
Loading unit 16 is desirably selectively removably couplable toelongated body 14.Loading unit 16 includes ahousing portion 36 having a proximal end adapted to releasably engage the distal end ofelongated body 14. A mounting assembly 38 is pivotally secured at “P” to the distal end ofhousing portion 36, and is configured to receive the proximal end oftool assembly 17 such that pivotal movement oftool assembly 17 about an axis at “P”, perpendicular to the longitudinal axis ofhousing portion 36, effects articulation oftool assembly 17. - With general reference to
FIG. 2 ,loading unit 16 includes a mountingassembly 40. Mountingassembly 40 includes an upper and a lower mountingportion axial drive assembly 50 is operatively associated with and slidably disposed between cartridge and/oranvil assembly FIG. 2 ,axial drive assembly 50 includes anelongated drive beam 52 having adistal end 54 and aproximal end 56.Drive beam 52 may be constructed from a single sheet of material or, preferably, multiple stacked sheets. -
Proximal end 56 ofdrive beam 52 ofdrive assembly 50 includes a pair of resilient engagement fingers that receive a pusher. The pusher is dimensioned and configured to mountingly engage a drive member, e.g., a drive rod or control rod (not shown) when the proximal end ofloading unit 16 is engaged withelongated body 14 ofsurgical stapling apparatus 10. The control rod functions to impart axial movement ofdrive assembly 50 fromhandle assembly 12. -
Distal end 54 ofdrive beam 52 ofdrive assembly 50 includes ahead 60 with a laterally extendingupper portion 64 a, a laterally extendinglower portion 64 b, and acentral wall portion 62. A distal edge ofcentral wall portion 62 defines a knife blade or the like 66. - As seen in
FIG. 2 ,anvil assembly 20 includes ananvil plate 70 having a plurality of staple deforming pockets/cavities (not shown) and acover plate 72 secured to a top surface ofanvil plate 70, having a cavity (not shown) is defined therebetween. The cavity defined between theanvil plate 70 andcover plate 72 is dimensioned to receive theupper portion 64 a ofhead 60 therein. Alongitudinal slot 70 b extends throughanvil plate 70 to facilitate passage ofcentral wall portion 62 ofhead 60 therethrough. Additionally,cover plate 72 defines a pair ofopposed recesses 72 a formed therein which align with the proximal pair ofrecesses 70 d formed inanvil plate 70 whencover plate 72 is assembled withanvil plate 70. - With continued reference to
FIG. 2 ,anvil plate 70 defines a proximal pair ofrecesses 70 d formed near a proximal end ofanvil plate 70 and disposed, one each, on opposed sides oflongitudinal slot 70 b.Anvil plate 70 defines a distal pair ofrecesses 70 e formed near a distal end ofanvil plate 70 and disposed, one each, on opposed sides oflongitudinal slot 70 b. In one embodiment, at least one of the recesses of each of the proximal pair ofrecesses 70 d and the distal pair ofrecesses 70 e is preferably non-circular and constricting, or has a reduced width dimension, so as to frictionally engage and/or pinch an anchor “S”. - As used herein the term anchor is understood to include and is not limited to sutures, threads, tethers, straps, bands, lines, wires, cables, fasteners, tacks or any other material suitable for the intended purpose disclosed herein. In certain embodiments, the anchor is an extension of the staple line reinforcement material discussed below. The anchor may comprise an integral part of the staple line reinforcement material, or may be formed from the same or a similar material and attached to the staple line reinforcement material.
- As seen in
FIGS. 2 and 2A ,anvil assembly 20 further includes a surgical anvil buttress “B1”, pledget or the like operatively secured to a lower surface or tissue contacting surface ofanvil plate 70, by an anchor “S”, to overlie at least some of anvil pockets 70 a and/or at least a portion of a length oflongitudinal slot 70 b. In particular, an anchor “S” is cinched around a proximal portion of surgical anvil buttress “B1” and each of the proximal pair ofrecesses 70 d and an anchor “S” is cinched around a distal portion of the surgical anvil buttress “B1” and each of the distal pair ofrecesses 70 e. - Surgical anvil buttress “B1” includes a proximal pair of notches formed in side edges aligned with the proximal pair of
recesses 70 d ofanvil plate 70, a distal pair of notches formed in side edges thereof aligned with the distal pair ofrecesses 70 e ofanvil plate 70, and a proximal notch formed in a proximal edge thereof aligned withlongitudinal slot 70 b when surgical anvil buttress “B1” is secured toanvil assembly 20. Surgical anvil buttress “B1” further includes a tongue or tab extending from a distal edge thereof to facilitate with the attachment of surgical anvil buttress “B1” toanvil assembly 20 during the assembly process. It is contemplated that the tongue is removed from surgical anvil buttress “B1” following securement of surgical anvil buttress “B1” toanvil assembly 20 and prior to packaging or shipment. - As seen in
FIGS. 2-9 ,anvil assembly 20 further includes arelease assembly 74 disposed betweenanvil plate 70 andcover plate 72 at a location in operative registration with the distal pair ofrecesses 70 e.Release assembly 74 includes aguide plate 75 defining anarcuate slot 75 a formed therethrough.Slot 75 a is configured and dimensioned to receive a tool (not shown) therethrough. The function and purpose ofslot 75 a will be discussed in greater detail below. -
Release assembly 74 further includes a lock oranchor bar 76 pivotally connected to anvil plate 70 (as seen inFIGS. 4 and 5 ) and/or optionally cover plate 72 (shown inFIG. 2 ).Anchor bar 76 includes abody portion 76 a defining an elongate channel orslot 76 b therein and afinger 76 c extending from an edge thereof.Finger 76 c is in operative registration with one of the distal pair ofrecesses 70 e, preferably, the one of the distal pair of recesses having the relatively larger width dimension. -
Suture release assembly 74 further includes an anchorbar actuation member 77 pivotally connected to anvil plate 70 (as seen inFIGS. 4 and 5 ) and/or optionally cover plate 72 (shown inFIG. 2 ).Actuation member 77 includes aneccentric cam 77 a defining a central axis of rotation about which actuation member is permitted to rotate.Actuation member 77 includes a nub orboss 77 b extending from a surface ofeccentric cam 77 a in a direction substantially parallel to and offset a radial distance from the central axis of rotation ofeccentric cam 77 a.Boss 77 b is slidably and rotatably disposed inelongate slot 76 b ofanchor bar 76.Actuation member 77 further includes arelease bar 77 c extending substantially tangentially fromeccentric cam 77 a from a side substantially opposite toboss 77 b.Release bar 77 c defines apin 77 d formed thereon which is in registration with thearcuate slot 75 a ofguide plate 75. In operation, aseccentric cam 77 a is rotated, pin 77 d ofrelease bar 77 c follows along the path ofarcuate slot 75 a ofguide plate 75. - As seen in
FIGS. 6 and 7 ,suture release assembly 74 includes a locking or anchoring configuration whereinfinger 76 c ofanchor bar 76 extends into or overlies the respective one of the pair ofdistal recesses 70 e in operative registration therewith,release bar 77 c ofactuation member 77 extends acrossknife slot 70 b ofanvil plate 70, and pin 77 d ofrelease bar 77 c is disposed at or near a first end ofarcuate slot 75 a ofguide plate 75. It is contemplated thatsuture release assembly 74 may include a friction fit or snap fit feature for maintaining and/or retainingsuture release assembly 74 in the locking or anchoring configuration at all times following the manufacturing/assembly process and prior to a complete firing ofsurgical stapling apparatus 10. - As seen in
FIGS. 8 and 9 ,suture release assembly 74 includes an open or release configuration whereinfinger 76 c ofanchor bar 76 does not extend into or overlie the respective one of the pair ofdistal recesses 70 e in operative registration therewith,release bar 77 c ofactuation member 77 does not extend acrossknife slot 70 b ofanvil plate 70, and pin 77 d ofrelease bar 77 c is disposed at or near a second end ofarcuate slot 75 a ofguide plate 75. -
Suture release assembly 74 is used by a manufacturer during the assembly process ofsurgical stapling apparatus 10 to secure, with a surgical suture or tether, a surgical anvil buttress “B” to a tissue contacting surface of theanvil plate 70, and by the end user ofsurgical stapling apparatus 10 to automatically release or free the surgical anvil buttress “B” from the tissue contacting surface of theanvil plate 70 upon a complete firing of thesurgical stapling apparatus 10. - With reference to
FIGS. 6-9 , during the manufacturing process, withsuture release assembly 74 in the open or release configuration (FIGS. 8 and 9 ), a surgical anvil buttress “B” is laid over the tissue contacting surface ofanvil plate 70. Then, a first end of a surgical suture “S1” is inserted into one of the pair ofdistal recesses 70 e and a second end of surgical suture “S1” is extended across the surgical anvil buttress “B1” (seeFIG. 2 ) and inserted into the other of the pair ofdistal recesses 70 e. It is contemplated that the first end of surgical suture “S1” may include a knot, stop or the like (not shown) sized so as to not pass through the narrower recess of the distal pair ofrecesses 70 e. - With the second end of the surgical suture “S1” disposed in the pair of
distal recesses 70 e, and with the surgical suture “S1” pulled taught across the surgical anvil buttress “B”, a tool (not shown) is inserted througharcuate slot 75 a ofguide plate 75 and engaged with an opening provided in thepin 77 d ofrelease bar 77 c. With reference toFIGS. 6 and 7 , the tool is then manipulated to move through or alongarcuate slot 75 a ofguide plate 75, thereby actuating or movingrelease bar 77 c and rotatingeccentric cam 77 a. Aseccentric cam 77 a is rotated,boss 77 b is rotated around the pivot axis ofeccentric cam 77 a and acts on the walls ofelongate slot 76 b ofanchor bar 76 thereby causinganchor bar 76 to pivot. Asanchor bar 76 is pivoted,finger 76 c thereof is caused to extend into or overlies one of thedistal recesses 70 e and to pinch the second end of the surgical suture disposed therewithin. Meanwhile,release bar 77 c has been moved to a position extending acrossknife slot 70 b ofanvil plate 70.Suture release assembly 74 is now in the locking or anchoring configuration, as described above. Thedistal recess 70 e that cooperates with thefinger 76 c is desirably relatively wide so as to allow the suture “S1” to easily pass into and out of therecess 70 e when the 76 anchor bar is away from therecess 70 e. The otherdistal recess 70 e, arranged on the opposite lateral side of theanvil plate 70, may be the same size, or may be small enough to cinch the suture “S1” and hold the suture in place to facilitate assembly. - In operation, with surgical anvil buttress “B1” secured against the lower surface of
anvil plate 70, during firing ofsurgical stapling apparatus 10, asdrive assembly 50 is advanced (i.e., moved from a proximal-most position to a distal-most position),knife blade 66 slices through a central section of the proximal suture “S2”, thereby freeing the proximal end of the surgical anvil buttress “B1” fromanvil assembly 20. During use, as the firing stroke ofsurgical stapling apparatus 10 is nearing completion and asdrive assembly 50 approaches a distal end ofknife slot 70 b ofanvil plate 70, as seen inFIG. 9 , drive assembly 50 contacts releasebar 77 c, urgingrelease bar 77 c and, in turn,eccentric cam 77 a to rotate about the pivot axis thereof. Aseccentric cam 77 a is rotated,boss 77 b is rotated around the pivot axis ofeccentric cam 77 a and acts on the walls ofelongate slot 76 b ofanchor bar 76 thereby causinganchor bar 76 to pivot. Asanchor bar 76 is pivoted,finger 76 c thereof is caused to move away from the relatively widerdistal recess 70 e and to release the second end of the surgical suture “S” disposed therewithin. With the second end of surgical suture “S” released or free, the distal end of the surgical anvil buttress “B1” is free to separate from the tissue contacting surface ofanvil plate 70. - As seen in
FIGS. 1 and 2 ,cartridge assembly 18 includes acarrier 80 defining anelongated support channel 80 a.Elongated support channel 80 a ofcarrier 80 receives astaple cartridge 82 therein. Corresponding tabs and slots formed alongstaple cartridge 82 andcarrier 80 function to retainstaple cartridge 82 withincarrier 80. A pair of support struts formed on and extending fromstaple cartridge 82 are positioned to rest on side walls ofcarrier 80 to further stabilizestaple cartridge 82 withinsupport channel 80 a ofcarrier 80.Staple cartridge 82 includesretention slots 82 a formed therein for receiving a plurality offasteners 84 and pushers 86. A plurality of spaced apartlongitudinal slots 82 b extend throughstaple cartridge 82 to accommodateupstanding cam wedges 90 a of anactuation sled 90. Theactuation sled 90 includes a central upstanding wedge orwall 90 b.Central wall 90 b defines a distal notch orshoulder 90 c formed therein (SeeFIG. 2 ). - A central
longitudinal slot 82 c is formed in and extends along the length ofstaple cartridge 82 to facilitate passage ofcentral wall portion 62 ofhead 60 therethrough. During operation ofsurgical stapler 10,actuation sled 90 translates throughlongitudinal slots 82 b ofstaple cartridge 82 to advancecam wedges 90 a into sequential contact withpushers 92, to causepushers 92 to translate vertically withinretention slots 82 a and urge fasteners 84 (e.g., staples) fromslots 82 a into the staple forming cavities 70 a ofanvil plate 70 ofanvil assembly 20. - With continued reference to
FIGS. 1 and 2 ,staple cartridge 82 defines a proximal pair ofrecesses 82 e formed near a proximal end thereof and disposed, one each, on opposed sides oflongitudinal slot 82 c.Staple cartridge 82 further defines a distal pair ofrecesses 82 f formed near a distal end thereof and disposed, one each, on opposed sides oflongitudinal slot 82 c. In one embodiment, at least one of the recesses of each of the proximal pair ofrecesses 82 e and the distal pair ofrecesses 82 f is preferably non-circular and constricting or otherwise arranged so as to frictionally engage and/or pinch an anchor “S”. - As seen in
FIGS. 1 and 2B ,cartridge assembly 18 further includes a surgical cartridge buttress “B2”, pledget or the like operatively secured to an upper surface or tissue contacting surface ofstaple cartridge 82, by anchors “S3” and “S4”, to overlie at least some ofstaple pockets 82 a and/or at least a portion of a length oflongitudinal slot 82 c. In particular, an anchor “S4” is cinched around a proximal portion of surgical cartridge buttress “B2” and each of the proximal pair ofrecesses 82 e and an anchor “S3” is cinched around a distal portion of the surgical cartridge buttress “B2” and each of the distal pair ofrecesses 82 f. - In one particular embodiment, a first end of each anchor “S” includes a knot, stop or the like (not shown) sized so as to not pass through one recess of the proximal pair of
recesses 82 e and a second end of each anchor “S” passes over, and transversely across, surgical cartridge buttress “B2”, at least once, and back through the other recess of the proximal pair ofrecesses 82 e. For example, the second end of each anchor “S” may be pinched or cinched in the other recess of the proximal pair ofrecesses 82 e so as to anchor the second end of the anchor “S” and secure the surgical cartridge buttress “B2” against the tissue contacting surface ofstaple cartridge 82. Similarly, an anchor “S3” is used to extend transversely across surgical cartridge buttress “B2” and into engagement with the distal pair ofrecesses 82 f. - In a further embodiment, the release assembly is arranged to cut the suture “S.” The
arcuate slot 75 a on theguide plate 75 extends in the opposite direction so that it is arranged to drive theanchor bar 95 toward the suture “S.” The surface of theanchor bar 76 that faces the suture S includes a sharpened edge and cuts the suture when actuated by the drive assembly. - Surgical cartridge buttress “B2” includes a proximal pair of notches formed in side edges aligned with the proximal pair of
recesses 82 e ofstaple cartridge 82, a distal pair of notches formed in side edges thereof aligned with the distal pair ofrecesses 82 f ofstaple cartridge 82, and a proximal notch formed in a proximal edge thereof aligned withlongitudinal slot 82 c when surgical cartridge buttress “B2” is secured tostaple cartridge 82. Surgical cartridge buttress “B2” further includes a tongue or tab extending from a distal edge thereof to facilitate with the attachment of surgical cartridge buttress “B2” tostaple cartridge 82 during the assembly process. It is contemplated that a width of surgical cartridge buttress “B2” may be reduced in a proximal portion thereof. It is further contemplated that the tongue is removed from surgical cartridge buttress “B2” following securement of surgical cartridge buttress “B2” tostaple cartridge 82 and prior to packaging or shipment. - As seen in FIGS. 2 and 10-14,
cartridge assembly 18 further includes acartridge release assembly 94 supported in and near a distal end ofstaple cartridge 82.Release assembly 94 includes a lock oranchor bar 95 pivotally connected tostaple cartridge 82.Anchor bar 95 includes abody portion 95 a having afinger 95 b extending from an edge thereof.Finger 95 b is in operative registration with one of the distal pair ofrecesses 82 f, preferably, the one of the distal pair of recesses having the relatively larger width dimension. -
Release assembly 94 further includes an anchorbar actuation member 97 pivotally connected to anchor bar 95 (as seen inFIGS. 11 and 12 ).Actuation member 97 includes afirst cam surface 97 a located along a proximal edge ofactuation member 97 and extending across centrallongitudinal slot 82 c ofstaple cartridge 82, and a secondeccentric cam surface 97 b extending distally and laterally fromactuation member 97 in close proximity to the one of the distal pair ofrecesses 82 f that is operatively associated withfinger 95 b ofanchor bar 95. First cam surface 97 a ofactuation member 97 is substantially arcuate or convex.Actuation member 97 defines an aperture oropening 97 c configured and dimensioned to receive apin 95 c ofanchor bar 95 therein so as to anchorbar 95 andactuation member 97 to pivot or rotate relative to one another. - In operation, rotation of
actuation member 97 in a first direction, about its pivot point, results insecond cam surface 97 b pressing against asurface 82 g (seeFIGS. 13 and 14 ) ofstaple cartridge 82 and thus movingfinger 95 b at least partially over and/or across the one of the distal pair ofrecesses 82 f associated therewith. - As seen in
FIG. 13 ,suture release assembly 94 includes a locking or anchoring configuration whereinfirst cam surface 97 a ofactuation member 97 extends into and across centrallongitudinal slot 82 c ofstaple cartridge 82, whereinsecond cam surface 97 b ofactuation member 97 is pressed againstsurface 82 g ofstaple cartridge 82, and thusfinger 95 b ofanchor bar 95 extends into or overlies the respective one of the pair ofdistal recesses 82 f in operative registration therewith.Fastener release assembly 94 may be maintained in the locking or anchoring configuration by way of a biasing member or a detent that engagesactuation member 97 in a manner so as to keepactuation member 97 in the locked or anchoring configuration. When in such a locked or anchoring configuration, the suture “S3” may be urged intorecess 82 f ofstaple cartridge 82. It is contemplated thatsuture release assembly 94 may include a friction fit or snap fit feature for maintaining and/or retainingsuture release assembly 94 in the locking or anchoring configuration at all times following the manufacturing/assembly process and prior to a complete firing ofsurgical stapling apparatus 10. - As seen in
FIGS. 12 and 14 ,suture release assembly 94 includes an open or release configuration whereinfinger 95 b ofanchor bar 95 does not extend into or overlie the respective one of the pair ofdistal recesses 82 f in operative registration therewith,first cam surface 97 a ofactuation member 97 does not extend into and across centrallongitudinal slot 82 c ofstaple cartridge 82, andsecond cam surface 97 b ofactuation member 97 is not pressed againstsurface 82 g ofstaple cartridge 82. -
Suture release assembly 94 is used by a manufacturer during the assembly process ofsurgical stapling apparatus 10 to secure, with an anchor, surgical suture, or tether “S”, a surgical cartridge buttress “B2” (seeFIG. 2 ) to a tissue contacting surface of thestaple cartridge 82, and by the end user ofsurgical stapling apparatus 10 to automatically release or free the surgical cartridge buttress “B2” from the tissue contacting surface of thestaple cartridge 82 upon a complete firing of thesurgical stapling apparatus 10. - With reference to
FIGS. 10-14 , during the manufacturing process, withsuture release assembly 94 in the open or release configuration, a surgical cartridge buttress “B2” is laid over the tissue contacting surface ofstaple cartridge 82. Then, a first end of a surgical suture “S” is inserted into the relatively narrower of the pair ofdistal recesses 82 f and a second end of surgical suture “S” is extended across the surgical cartridge buttress “B2” and inserted into the relatively wider of the pair ofdistal recesses 82 f. It is contemplated that the first end of surgical suture “S” may include a knot, stop or the like (not shown) sized so as to not pass through the narrower recess of the distal pair ofrecesses 82 f. - As seen in
FIG. 11 ,staple cartridge 82 includes an access opening 83 formed therein which is used to insert and receivesuture release assembly 94 therein and to provide access toactuation member 97. With the second end of the surgical suture “S” disposed in the relatively wider of the pair ofdistal recesses 82 f, and with the surgical suture “S” pulled taught across the surgical cartridge buttress “B2,”actuation member 97 is rotated about the pivot axis causingfirst cam surface 97 a ofactuation member 97 to extend into and across centrallongitudinal slot 82 c ofstaple cartridge 82 and causingsecond cam surface 97 b ofactuation member 97 to press againstsurface 82 g (seeFIGS. 13 and 14 ) ofstaple cartridge 82. In so doing,anchor bar 95 is pivoted by an amount sufficient forfinger 95 b ofanchor bar 95 to extend into or overlies the respective one of the pair ofdistal recesses 82 f in operative registration therewith thereby pinch the second end of the surgical suture disposed therewithin.Suture release assembly 94 is now in the locking or anchoring configuration, as described above. - In operation, with surgical cartridge buttress “B1” secured against the tissue contacting surface of
staple cartridge 82, during firing ofsurgical stapling apparatus 10, asdrive assembly 50 is advanced (i.e., moved from a proximal-most position to a distal-most position),knife blade 66 slices through a central section of the proximal suture “S4”, thereby freeing the proximal end of the surgical cartridge buttress “B2” fromstaple cartridge 82. During use, as the firing stroke ofsurgical stapling apparatus 10 is nearing completion and asdrive assembly 50 approaches a distal end of centrallongitudinal slot 82 c ofstaple cartridge 82, as seen inFIG. 14 ,drive assembly 50 contactsfirst cam surface 97 a ofactuation member 97, urgingactuation member 97 to rotate.Second cam surface 97 b ofactuation member 97 also rotates about the pivot axis ofpivot pin 95 c thereof. As eccentricsecond cam surface 97 b is rotated about the pivot axissecond cam surface 97 b, the distance between thepivot pin 95 c and thesurface 82 g ofstaple cartridge 82 is reduced thereby pivotinganchor bar 95 aboutpivot pin 95 c. Asanchor bar 95 is pivoted,finger 95 c thereof is caused to move away from the relatively widerdistal recess 82 f and to release the second end of the surgical suture “S” disposed therewithin. With the second end of surgical suture “S” released or free, the distal end of the surgical cartridge buttress “B2” is free to separate from the tissue contacting surface ofstaple cartridge 82. The distal recesses 82 f that is in operative registration withfinger 95 b ofanchor bar 95 is dimensioned so that, notwithstanding the rotation ofanchor bar 95, the suture “S3” is not cinched therewithin. - As
drive assembly 50 is advanced from the proximal position to the distal position,knife blade 66 thereof slices or cuts longitudinally through both surgical anvil buttress “B1” and surgical cartridge buttress “B2”, thereby dividing the buttresses “B1, B2” substantially in half. Additionally, asdrive assembly 50 is advanced from a proximal-most position to a distal-most position,upstanding cam wedges 90 a ofactuation sled 90 actuatespushers 92, to causepushers 92 to translate vertically withinretention slots 82 a andurge fasteners 84 fromslots 82 a. As fasteners 84 (e.g., staples) are urged fromslots 82 a ofstaple cartridge 82, legs offasteners 84 penetrate and pass through both surgical anvil buttress “B1” and surgical cartridge buttress “B2”, through any tissue (not shown) interposed between surgical anvil buttress “B1” and surgical cartridge buttress “B2”, and are formed against or within staple forming cavities 70 a ofanvil plate 70 ofanvil assembly 20. Buttresses “B1, B2” preferably include perforations that divide the buttresses and facilitate removal of the apparatus from the tissue. - According to the present disclosure, surgical anvil buttress “B1” and/or surgical cartridge buttress “B2” is pre-loaded (i.e., from the manufacturer) onto
anvil assembly 20 orcartridge assembly 18, respectively, of theloading unit 16. After the loading unit is fired, an additional unfired loading unit, with or without buttresses “B”, can be loaded onto the surgical apparatus. In certain embodiments, the replaceable loading unit is a removable cartridge that can be inserted into support channel ofcarrier 80. A buttress and release assembly may be pre-loaded onto the removable cartridge and means for the user of the surgical apparatus to load a buttress onto the anvil assembly can be provided. For example, a buttress having an adhesive can be used. Additional or replacement buttresses “B” foranvil assembly 20 and/orcartridge assembly 18 may be secured to eitheranvil assembly 20 orcartridge assembly 18 as needed or desired. - In a further embodiment, the release assembly may be arranged to cut the suture “S.” The
cam surface 97 b on theactuation member 97 may be arranged to cam theanchor bar 95 toward the suture “S.” The surface of theanchor bar 97 that faces the suture “S” may include a sharpened edge and may cut the suture when actuated by the drive assembly. - Turning now to
FIGS. 15-25 , a loading unit according to another embodiment of the present disclosure, forsurgical stapling apparatus 10, is generally designated as 116.Loading unit 116 is substantially similar toloading unit 16 and will only be discussed in detail herein to the extent necessary to identify differences in construction and operation. - As seen in
FIGS. 15-20 ,anvil assembly 120 ofloading unit 116 includes asuture release assembly 174 disposed betweenanvil plate 170 andcover plate 172 at a location in operative registration with the distal pair ofrecesses 170 e.Suture release assembly 174 includes alink arm 175 pivotally connected to anvil plate 170 (as seen inFIG. 18 ) and/or optionally coverplate 172.Link arm 175 includes abody portion 175 a defining a pocket orrecess 175 c formed in afirst side edge 175 b thereof and acamming surface 175 d defined substantially along an adjacent side or proximal edge thereof.Pocket 175 c has a substantially arcuate, circular or rounded profile. As seen inFIGS. 18 and 20 ,link arm 175 includes apivot pin 175 e extending frombody portion 175 a for pivotally connectinglink arm 175 toanvil assembly 120. -
Release assembly 174 further includes apusher bar 177 pivotally connected to linkarm 175 and slidably disposed betweenanvil plate 170 andcover plate 172.Pusher bar 177 includes abody portion 177 a having a substantially rectangular configuration and ahead 177 b, extending from a corner ofbody portion 177 a, and having a substantially circular or rounded configuration.Head 177 b ofpusher bar 177 is configured and dimensioned for pivotable and/or rotatable connection inpocket 175 c oflink arm 175. - As seen in
FIG. 19 ,suture release assembly 174 includes an unactuated configuration whereinpusher bar 177 does not extend into or overlie the respective one of the pair ofdistal recesses 170 e in operative registration therewith, and a longitudinal axis oflink arm 175 is oriented substantially parallel with a longitudinal axis ofloading unit 116. It is contemplated thatsuture release assembly 174 may include a friction fit or snap fit feature for maintaining and/or retainingsuture release assembly 174 in the locking or anchoring configuration at all times following the manufacturing/assembly process and prior to a complete firing of the surgical stapling apparatus. - As seen in
FIG. 20 ,suture release assembly 174 includes an actuated configuration whereinpusher bar 177 extends into or overlies the respective one of the pair ofdistal recesses 170 e in operative registration therewith, and a longitudinal axis oflink arm 175 is oriented substantially transverse to the longitudinal axis ofloading unit 116. - With reference to
FIGS. 15-20 , during the manufacturing process, withsuture release assembly 174 in the unactuated configuration, a surgical anvil buttress (not shown) is laid over the tissue contacting surface ofanvil plate 170. Then, a first end of a surgical suture “S1” is inserted into one of the pair ofdistal recesses 170 e and a second end of surgical suture “S1” is extended across the surgical anvil buttress (not shown) and inserted into the other of the pair ofdistal recesses 170 e. It is contemplated that each of the pair ofdistal recesses 170 e is an open ended constricting slot so as to frictionally grip or cinch a surgical suture “S1” disposed therein. - In operation, with a surgical anvil buttress (not shown) secured against the lower surface of
anvil plate 170, during firing of the surgical stapling apparatus, asdrive assembly 150 is advanced (i.e., moved from a proximal-most position to a distal-most position), knife blade 166 slices through a central section of the proximal suture (not shown), thereby freeing the proximal end of the surgical anvil buttress (not shown) fromanvil assembly 120. During use, as the firing stroke of the surgical stapling apparatus is nearing completion and asdrive assembly 150 approaches a distal-most end of knife slot 170 b ofanvil plate 170, as seen inFIG. 20 , drive assembly 150contacts camming surface 175 d oflink arm 175, thus urginglink arm 175 to rotate or pivot around the pivot pin and, in turn, urgingpusher bar 177 to translate in the direction of the slot. Aspusher bar 177 is translated,pusher bar 177 comes into contact with and urges the second end of suture “S1” out of thedistal recess 170 e that is registration therewith to release the second end of suture “S1” therefrom. With the second end of surgical suture “S1” released or free fromdistal recess 170 e, the distal end of the surgical anvil buttress “B1” is free to separate from the tissue contacting surface ofanvil plate 170. - As seen in
FIGS. 15 , 16 and 21-25,cartridge assembly 118 ofloading unit 116 includes acartridge release assembly 194 supported in and near a distal end ofstaple cartridge 182.Release assembly 194 includes aretainer 195 supported in a distal end ofstaple cartridge 182 at a location near a distal end oflongitudinal slot 182 c and at least partially extending thereacross.Retainer 195 includes abody portion 195 a, aboss 195 b extending from a surface thereof, and defines a channel orrecess 195 c formed in a surface thereof and extending through a side thereof. When supported instaple cartridge 182,recess 195 c ofretainer 195 is in registration with one of the pair ofdistal recesses 182 f ofstaple cartridge 182. -
Release assembly 194 further includes apusher member 196 having ahead portion 196 a pivotally connected toboss 195 b ofretainer 195.Pusher member 196 further includes afirst leg member 196 b extending fromhead portion 196 a and asecond leg member 196 c connected to a free end offirst leg member 196 b via a livinghinge connection 196 d.Pusher member 196 further includespiston 196 e connected to a free end ofsecond leg member 196 c via a livinghinge connection 196 f.Piston 196 e is slidably disposed and translatable withinrecess 195 c ofretainer 195. In certain other embodiments, the pusher is a linkage assembly having a first link pivotably connected to the cartridge at one end. The other end of the first link is pivotably connected to a first end of a second link. The opposite, second, end of the second link is confined in the recess of the retainer. - As seen in
FIG. 24 ,release assembly 194 includes an unactuated configuration whereinpiston 196 e does not extend into or overlie the respective one of the pair ofdistal recesses 182 f, andfirst leg member 196 b andsecond leg member 196 c are angled with respect to one another and project proximally alonglongitudinal slot 182 c ofstaple cartridge 182. It is contemplated thatsuture release assembly 194 may include a friction fit or snap fit feature for maintaining and/or retainingsuture release assembly 194 in the locking or anchoring configuration at all times following the manufacturing/assembly process and prior to a complete firing of the surgical stapling apparatus. - As seen in
FIG. 25 ,suture release assembly 194 includes an actuated configuration whereinpiston 196 e extends into or overlies the respective one of the pair ofdistal recesses 182 f in operative registration therewith, andfirst leg member 196 b andsecond leg member 196 c are extended substantially along a common axis. - With reference to
FIGS. 21-25 , during the manufacturing process, withsuture release assembly 194 in the unactuated configuration, a surgical cartridge buttress (not shown) is laid over the tissue contacting surface ofstaple cartridge 182. Then, a first end of a surgical suture “S3” is inserted into one of the pair ofdistal recesses 182 f and a second end of surgical suture “S3” is extended across the surgical cartridge buttress and inserted into the other of the pair ofdistal recesses 182 f. It is contemplated that at least therecess 182 f that is adjacent theretainer 195 is an open ended constricting slot so as to frictionally grip or cinch a surgical suture “S3” disposed therein. - In operation, with surgical cartridge buttress (not shown) secured against the tissue contacting surface of
staple cartridge 182, during firing ofsurgical stapling apparatus 10, asdrive assembly 150 is advanced (i.e., moved from a proximal-most position to a distal-most position), knife blade 166 slices through a central section of a proximal suture (not shown), thereby freeing the proximal end of the surgical cartridge buttress fromstaple cartridge 182. During use, as the firing stroke ofsurgical stapling apparatus 10 is nearing completion and asdrive assembly 150 approaches a distal end of centrallongitudinal slot 182 c ofstaple cartridge 182, as seen inFIG. 25 , drive assembly 150 contacts livinghinge connection 196 d betweenfirst leg member 196 b andsecond leg member 196 c. Asdrive assembly 150 is further advanced distally, drive assembly 150 presses against livinghinge connection 196 d, causingfirst leg member 196 b andsecond leg member 196 c to extend. Asfirst leg member 196 b andsecond leg member 196 c extend,piston 196 e is translated throughrecess 195 c ofretainer 195. Aspiston 196 e is translated throughrecess 195 c ofretainer 195,piston 196 e engages the second end of suture “S3” and urges suture “S3” out of thedistal recess 182 f that is registration therewith to release the second end of suture “S3” therefrom. With the second end of surgical suture “S3” released or free fromdistal recess 182 f, the distal end of the surgical cartridge buttress “B” is free to separate from the tissue contacting surface ofstaple cartridge 182. - Turning now to
FIGS. 26-29 , a loading unit according to another embodiment of the present disclosure, forsurgical stapling apparatus 10, is generally designated as 216.Loading unit 216 is substantially similar toloading unit - As seen in
FIGS. 26-29 ,anvil assembly 220 ofloading unit 216 includes arelease assembly 274 disposed betweenanvil plate 270 andcover plate 272 at a location in operative registration with the distal pair ofrecesses 270 e.Release assembly 274 includes acam 275 pivotally connected toanvil plate 270 and/orcover plate 272.Cam 275 includes abody portion 275 a having an ovular profile and defining acam surface 275 b that is in operative association with one of the distal pair ofrecesses 270 e.Cam 275 further includes a finger or stem 275 c projecting at an angle from a lateral edge ofbody portion 275 a. -
Release assembly 274 further includes apusher 277 slidably disposed betweenanvil plate 270 andcover plate 272. As seen inFIGS. 27-29 ,pusher 277 may be slidably disposed withinlongitudinal slot 270 b of anvil plate 270 a.Pusher 277 includes acam arm 277 a extending substantially in a distal direction.Cam arm 277 a is configured and dimensioned to engage and/or act onfinger 275 c extending fromcam 275. - As seen in
FIG. 28 ,suture release assembly 274 includes an unactuated configuration whereinbody portion 275 a ofcam 275 does not extend into or overlie the respective one of the pair ofdistal recesses 270 e in operative registration therewith, andpusher 277 is in a retracted or non-advanced position. As seen inFIG. 28 ,cam arm 277 a ofpusher 277 isadjacent finger 275 c and may, although not necessarily, be in contact withfinger 275 c ofcam 275. - As seen in
FIG. 29 ,suture release assembly 274 includes an actuated configuration whereinbody portion 275 a ofcam 275 extends into or overlies the respective one of the pair ofdistal recesses 270 e in operative registration therewith, andpusher 277 is in an advanced position. As seen inFIG. 29 , whenpusher 277 is in the advanced position,cam arm 277 a ofpusher 277 has engagedfinger 275 c ofcam 275 to rotatebody portion 275 a ofcam 275. - In operation, with an surgical anvil buttress (not shown) secured against the lower surface of
anvil plate 270, during firing of the surgical stapling apparatus, asdrive assembly 250 approaches a distal-most end ofknife slot 270 b ofanvil plate 270, drive assembly 250contacts pusher 277, thus drivingpusher 277 distally. Aspusher 277 is driven distally, as seen inFIGS. 28 and 29 ,cam arm 277 a ofpusher 277 engagesfinger 275 c ofcam 275 to rotate orpivot cam 275. Ascam 275 is rotated,cam surface 275 b ofcam 275 comes into contact with and urges the second end of suture “S1” out of thedistal recess 270 e that is registration therewith to release the second end of suture “S1” therefrom. With the second end of surgical suture “S1” released or free fromdistal recess 270 e, the distal end of the surgical anvil buttress is free to separate from the tissue contacting surface ofanvil plate 270. - Turning now to
FIGS. 30 and 31 , a loading unit according to another embodiment of the present disclosure, forsurgical stapling apparatus 10, is generally designated as 316.Loading unit 316 is substantially similar toloading unit - As seen in
FIGS. 30 and 31 ,anvil assembly 320 ofloading unit 316 includes arelease assembly 374 disposed between anvil plate 370 and the cover plate at a location in operative registration with the distal pair ofrecesses 370 e.Release assembly 374 includes abody portion 374 a slidably disposed withinlongitudinal slot 370 b of anvil plate 370 a.Release assembly 374 further includes ahead portion 374 b connected to or extending from a distal surface ofbody portion 374 a.Head portion 374 b defines acam surface 374 c along a side edge thereof that is configured and dimensioned for operatively association with one of the distal pair ofrecesses 370 e formed in anvil plate 370 a.Cam surface 374 c may have an arcuate, curved or sinusoidal profile. - As seen in
FIG. 30 ,suture release assembly 374 includes an unactuated configuration whereinbody portion 374 a is retracted andcam surface 374 c does not extend into or across the respective one of the pair ofdistal recesses 370 e in operative registration therewith. - As seen in
FIG. 31 ,suture release assembly 374 includes an actuated configuration whereinbody portion 374 a is advanced distally andcam surface 374 c extends into or overlies the respective one of the pair ofdistal recesses 370 e in operative registration therewith. - In operation, with a surgical anvil buttress (not shown) secured against the lower surface of anvil plate 370, during firing of the surgical stapling apparatus, as
drive assembly 350 approaches a distal-most end ofknife slot 370 b of anvil plate 370, as seen inFIGS. 30 and 31 , drive assembly 350contacts body portion 374 a ofrelease assembly 374, thus drivinghead portion 374 b distally. Ashead portion 374 b is driven distally,cam surface 374 c comes into contact with and urges the second end of suture “S1” out of thedistal recess 370 e that is registration therewith to release the second end of suture “S1” therefrom. With the second end of surgical suture “S10” released or free fromdistal recess 370 e, the distal end of the surgical anvil buttress is free to separate from the tissue contacting surface of anvil plate 370. - In a further embodiment, the driving head portion may include a sharpened edge instead of
cam surface 374 c. As the driving head portion is moved distally, the suture “S1” is caught between the sharpened edge of the driving head portion and the side of thedistal recess 370 e, severing the suture “S1.” - Turning now to
FIGS. 32-38 , a loading unit according to another embodiment of the present disclosure, forsurgical stapling apparatus 10, is generally designated as 416.Loading unit 416 is substantially similar toloading unit - As seen in
FIGS. 32-38 ,cartridge assembly 418 ofloading unit 416 includes acartridge release assembly 494 supported in and near a distal end ofstaple cartridge 482.Release assembly 494 includes aretainer 495 supported in a distal end ofstaple cartridge 482 at a location near a distal end oflongitudinal slot 482 c and at least partially extending thereacross.Retainer 495 includes abody portion 495 a, aboss 495 b extending from a surface thereof, and defines a channel orrecess 495 c formed in a surface thereof and extending through a side thereof.Body portion 495 a ofretainer 495 defines a slot 495 d formed in opposed sides thereof and which are configured to receive a suture therein. When supported instaple cartridge 482,recess 495 c ofretainer 495 is in registration with one of the pair ofdistal recesses 482 f ofstaple cartridge 482, and slots 495 d ofretainer 495 are in registration with the pair ofdistal recesses 482 f of staple cartridge 482 (seeFIG. 32 ). -
Release assembly 494 further includes acam member 496 having ahead portion 496 a pivotally connected toboss 495 b ofretainer 495.Cam member 496 further includes abody portion 496 b extending fromhead portion 496 a.Body portion 496 b defines afirst cam surface 496 c and asecond cam surface 496 d each extending substantially tangentially to an axis of rotation ofcam member 496. -
Release assembly 494 further includes asled 497 slidably disposed withinchannel 495 c ofretainer 495.Sled 497 includes abody portion 497 a defining acam surface 497 b oriented to operatively engagesecond cam surface 496 d ofcam member 496, and aside wall 497 c in registration with the one of the pair ofdistal recesses 482 f ofstaple cartridge 482 that is in registration withrecess 495 c ofretainer 495. - As seen in
FIG. 37 ,release assembly 494 includes an unactuated configuration whereinfirst cam surface 496 c ofcam member 496 extends acrosslongitudinal slot 482c staple cartridge 482,side wall 497 c ofsled 497 does not extend into or over the one of the pair ofdistal recesses 482 f ofstaple cartridge 482 that is in registration therewith, andsecond cam surface 496 d ofcam member 496 is substantially in flush contact withcam surface 497 b ofsled 497. - As seen in
FIG. 38 ,release assembly 494 includes an actuated configuration whereinfirst cam surface 496 c ofcam member 496 does not substantially extend acrosslongitudinal slot 482 c ofstaple cartridge 482,side wall 497 c ofsled 497 extends into or over the one of the pair ofdistal recesses 482 f ofstaple cartridge 482 that is in registration therewith, andsecond cam surface 496 d ofcam member 496 is spaced away fromcam surface 497 b ofsled 497. - With reference to
FIGS. 32-38 , during the manufacturing process, withsuture release assembly 494 in the unactuated configuration, a surgical cartridge buttress (not shown) is laid over the tissue contacting surface ofstaple cartridge 482. Then, a first end of a surgical suture “S3” is inserted into one of the pair ofdistal recesses 482 f and a second end of surgical suture “S3” is extended across the surgical cartridge buttress and inserted into the other of the pair ofdistal recesses 482 f. It is contemplated that at least thedistal recesses 482 f adjacent theside wall 497 c is an open ended constricting slot so as to frictionally grip or cinch a surgical suture “S3” disposed therein. - In operation, with a surgical cartridge buttress (not shown) secured against the tissue contacting surface of
staple cartridge 482, during firing of the surgical stapling apparatus, asdrive assembly 450 approaches a distal end of centrallongitudinal slot 482 c ofstaple cartridge 482, as seen inFIG. 38 , drive assembly 450 contactssecond cam surface 496 c ofcam member 496 extending acrosslongitudinal slot 482 c ofstaple cartridge 482. - As
drive assembly 450 is further advanced distally, drive assembly 450 presses againstfirst cam surface 496 c ofcam member 496, causingcam member 496 to rotate. Ascam member 496 is rotated,second cam surface 496 d thereof contacts and presses againstcam surface 497 b ofsled 497 thus causingsled 497 to translate inrecess 495 c ofretainer 495. Assled 497 is translated throughrecess 495 c,side wall 497 c ofsled 497 engages the second end of suture “S3” and urges suture “S3” out of thedistal recess 482 f that is registration therewith to release the second end of suture “S3” therefrom. With the second end of surgical suture “S3” released or free fromdistal recess 482 f, the distal end of the surgical cartridge buttress is free to separate from the tissue contacting surface ofstaple cartridge 482. - Turning now to
FIGS. 39-46 , an anvil assembly according to another embodiment of the present disclosure, for use with loading unit 116 (seeFIGS. 15-25 ), is generally designated as 520.Anvil assembly 520 is substantially similar toanvil assembly 120 and will only be discussed in detail herein to the extent necessary to identify differences in construction and operation. - As seen in
FIGS. 39 and 40 ,anvil assembly 520 includes asuture release assembly 574 disposed betweenanvil plate 570 andcover plate 572 at a location in operative registration with the distal pair ofrecesses 570 e ofanvil plate 570.Suture release assembly 574 includes alink arm 575 pivotally connected toanvil plate 570.Link arm 575 includes abody portion 575 a defining a pocket orrecess 575 c formed in afirst side edge 575 b thereof and acamming surface 575 d defined substantially along an adjacent side or proximal edge thereof.Pocket 575 c has a substantially circular profile and defines anarcuate relief 575 e is a side wall thereof. -
Release assembly 574 further includes apusher bar 577 pivotally connected to linkarm 575 and slidably disposed betweenanvil plate 570 andcover plate 572.Pusher bar 577 includes abody portion 577 a having a substantially rectangular configuration and ahead 577 b, extending from a corner ofbody portion 577 a, and having a substantially circular or rounded configuration.Body portion 577 a ofpusher bar 577 defines an arcuate distal surface orwall 577 c configured to ride against asurface 570 f ofanvil plate 570.Head 577 b ofpusher bar 577 is configured and dimensioned for pivotable and/or rotatable connection inpocket 575 c oflink arm 575.Head 577 b ofpusher bar 577 includes astop member 577 d projecting from a side edge thereof and intoarcuate relief 575 e ofpocket 575 c oflink arm 575. A relative distance of rotation ofpusher bar 577 relative to linkarm 575 is determined by a relative length ofarcuate relief 575 e and a relative width ofstop member 577 d. - Turning now to
FIGS. 41-46 , in accordance with the present embodiment,anvil assembly 520 defines a proximal pair ofrecesses 570 d formed near a proximal end ofanvil plate 570 and disposed, one each, on opposed sides oflongitudinal slot 570 b.Anvil plate 570 defines a distal pair ofrecesses 570 e formed near a distal end ofanvil plate 570 and disposed, one each, on opposed sides oflongitudinal slot 570 b. In one embodiment, at least one of the recesses of each of the proximal pair ofrecesses 570 d and at least one of the recesses of the distal pair ofrecesses 570 e is in the form of a keyhole-shaped slot/recess. - In particular, as seen in
FIG. 44 , at least one of the recesses of each of the proximal pair ofrecesses 570 d defines a uniform widthcentral portion 570 d 1, an expanding or wideningmouth portion 570 d 2 disposed at one end ofcentral portion 570 d 1 and opening out beyond a side edge ofanvil plate 570, and anenlarged head portion 570 d 3 disposed at an opposite end ofcentral portion 570 d 3.Central portion 570 d 1 ofrecess 570 d defines a first width W1, andenlarged head portion 570 d 3 defines a second width W2 that is larger than first width W1. - As seen in
FIG. 43 , at least one of the recesses of each of the distal pair ofrecesses 570 e defines a uniform widthcentral portion 570 e 1, an expanding or wideningmouth portion 570 e 2 disposed at one end ofcentral portion 570 e 1 and opening out beyond a side edge ofanvil plate 570, and anenlarged head portion 570 e 3 disposed at an opposite end ofcentral portion 570 e 3.Central portion 570 e 1 ofrecess 570 e defines a first width W1, andenlarged head portion 570 e 3 defines a second width W2 that is larger than first width W1. As seen inFIGS. 43 and 44 , enlargedhead portion 570 e 3 is oval in shape having a length that is greater than second width W2. - In this manner, the sutures will reside in the enlarged head portions of the proximal pair of
recesses 570 d and the distal pair ofrecesses 570 e, and the reduced widtrh portions thereof will inhibit the sutures form sliding/walking out of the recesses without application of an external force thereto. By way of example, it is envisioned that width W1 is about 0.009-0.011 inches, width W2 is about 0.014-0.016 inches, and the sutures have a diameter of about 0.0165-0.0185 inches. - Turning now to
FIGS. 45 and 46 , in accordance with the present embodiment,anvil assembly 520 defines a distal pair ofrecesses 572 b formed near a distal end ofcover plate 572 and disposed in operative registration with the distal pair ofrecesses 570 e ofanvil plate 570. In one embodiment, at least one of the recesses of each of the distal pair ofrecesses 572 b ofcover plate 572 is in the form of a keyhole-shaped slot/recess. - As seen in
FIG. 46 , at least one of the recesses of each of the distal pair ofrecesses 572 b defines a uniform widthcentral portion 572 b 1, an expanding or wideningmouth portion 572 b 2 disposed at one end ofcentral portion 572 b 1 and opening out beyond a side edge ofcover plate 572, and anenlarged head portion 572 b 3 disposed at an opposite end ofcentral portion 572 b 1.Central portion 572 b 1 ofrecess 572 b defines a first width W1, andenlarged head portion 572 b 3 defines a second width W2 that is larger than first width W1. - Keyhole-shaped slots or
recesses recesses anvil plate 70 and recess 72 b ofcover plate 72, as described above. - It is further contemplated that a keyhole-shaped slot or recess may be provided in place of any of the side slots defined in any of the anvil assemblies and/or cartridge assemblies disclosed herein.
- In further embodiments, recesses 570 d, 570 e, 572 b are provided with differently-shaped slots and configurations to facilitate the insertion and/or release of a suture “S” (not shown) in a variety of circumstances. While the following embodiments illustrate a recess on the distal end of
cover plate 572, it is contemplated that these configurations may be applied equally to recesses on theanvil plate 570. - Referring now to
FIG. 47 , a recess 572 f is shown having a uniform width central portion 572 f 1, an expanding or widening mouth portion 572 f 2 disposed at one end of central portion 572 f 1 and opening out beyond a side edge ofcover plate 572, and a circular head portion 572 f 3 disposed at an opposite end of central portion 572 f 1. Central portion 572 f 1 of recess 572 f defines a first width W1f, and circular head portion 572 f 3 defines a second width W2f that is larger than first width W1f. Recess 572 f differs fromrecess 572 b in that theenlarged head portion 572 b 3 is elongated or oval while the head portion 572 f 3 is substantially circular. - Turning now to
FIG. 48 , arecess 572 g is shown having a uniform widthcentral portion 572 g 1 disposed at an angle with a side edge ofcover plate 572, an expanding or wideningmouth portion 572 g 2 disposed at one end ofcentral portion 572 g 1 and opening out beyond a side edge ofcover plate 572 and arounded head portion 572 g 3 disposed at an opposite end ofcentral portion 572 g 1. Recess 572 g is configured to engage a suture “S” (not shown) at an angle rather than substantially transverse to a side edge ofcover plate 572 as in previous embodiments. Recess 572 g prevents a suture “S” (not shown) from sliding out ofrecess 572 g in a path substantially transverse to a side edge ofcover plate 572. This may be particularly beneficial during the operation ofsurgical stapling apparatus 10, as theanvil assembly 520 is advanced through tissue. - Referring to
FIG. 49 , an embodiment of arecess 572 h is shown having a uniform widthcentral portion 572 h 1, an expanding or wideningmouth portion 572 h 2 disposed at one end ofcentral portion 572 h 1 and opening out beyond a side edge ofcover plate 572, and anenlarged head portion 572 h 3 disposed at an opposite end ofcentral portion 572 h 1.Central portion 572 h 1 ofrecess 572 h defines a first width W1h, andenlarged head portion 572 h 3 defines a second width W2h that is larger than first width W1h. Disposed withincentral portion 572 h 1 are a plurality ofbarbs 572 h 1a such that upon insertion of a suture “S” (not shown) into arecess 572 h, the edges of 572 h 1b engage suture “S” (not shown) so that it is restricted from motion away from theenlarged head portion 572 h 3. - Turning to
FIG. 50 , disposed on an inner wall of therecess 572 h within theelongated head portion 572 h 3 are a pair ofsteppes 572 h 3a,3b.Steppes 572 h 3a,b are defined by ledges that are offset along a line extending through theelongated head portion 572 h 3. In other embodiments, varying numbers of steppes may be present. - In use, the pair of
steppes 572 h 3a,3b serve to trap suture “S” (not shown) withinelongated head portion 572 h 3 to prevent/inhibit distal motion of the suture “S” (not shown) or withdrawal of suture “S” fromrecess 572 h. Suture “S” (not shown) is trapped along a path defined by the internal wall ofrecess 572 h andsteppes 572 h 3a,3b. If suture “S” (not shown) is provided with barbs on its outer surface,steppes 572 h 3a,3b may serve to engage the barbs on suture “S” (not shown) to further inhibit motion of sutures “S”. Thus,steppes 572 h 3a,3b work in conjunction withbarbs 572 h 1a to keep suture “S” (not shown) disposed in a substantially fixed position within theelongated head portion 572 h 3 during operation of theanvil assembly 520. - According to further embodiments of the present disclosure, it is contemplated that buttresses “B” may be provided or formed with integral wings or tabs extending therefrom for insertion and/or receipt into distal and/or proximal recesses of anvil assembly and/or cartridge assembly. It is further contemplated that sutures “S” may be affixed to, embedded in or other wise connected to buttresses “B.”
- Exemplary surgical buttresses “B” for use with the surgical stapling devices disclosed herein are shown and described in commonly assigned U.S. Pat. Nos. 5,542,594; 5,908,427; 5,964,774; and 6,045,560, and commonly assigned U.S. application Ser. No. 12/579,605, filed on Oct. 15, 2009 (now U.S. Patent Publication No. 2010/0092710, now U.S. Pat. No. 8,157,151), commonly assigned U.S. application Ser. No. 11/241,267, filed on Sep. 30, 2005 (U.S. Patent Publication No. 2006/0085034, now U.S. Pat. No. 7,938,307), and U.S. application Ser. No. 11/248,846, filed on Oct. 12, 2005 (U.S. Patent Publication No. 2006/0135992, now U.S. Pat. No. 7,823,592), the entire contents of each of which is incorporated herein by reference.
- Surgical buttresses “B” may be fabricated from a suitable biocompatible and bioabsorbable material. Surgical buttresses “B” may be fabricated from a non-absorbent material which does not retain fluid. Surgical buttresses “B” may be fabricated from “BIOSYN” made from GLYCOMER 631 (a block copolymer), a synthetic polyester composed of glycolide, dioxanone and trimethylene carbonate.
- One block of the resulting copolymer contains randomly combined units derived from p-dioxanone (1,4-dioxan-2-one) and trimethylene carbonate (1,3-dioxan-2-one). The second block of the copolymer contains randomly combined units derived from glycolide and p-dioxanone. The resulting polyester is an ABA triblock terpolymer possessing about 60% glycolide, about 14% dioxanone, and about 26% trimethylene carbonate.
- In accordance with the present disclosure, it is further contemplated that surgical buttresses “B” may be constructed and/or fabricated, from the above-identified materials, as a non-woven, absorbable felt and the like.
- With reference to
FIGS. 1-52 , and specifically,FIGS. 51 and 52 , as mentioned above, in accordance with the present disclosure, and either in place of or in addition to the methods and systems disclosed above for attaching surgical buttresses “B1, B2” to the tissue contacting/facing surface ofcartridge assembly 18 and/oranvil assembly 20 of a surgical stapling apparatus 100, surgical buttresses “B1, B2” may be further attached to the tissue contacting/facing surface ofcartridge assembly 18 and/oranvil assembly 20 ofsurgical stapling apparatus 10 in a number of different ways. - For example, a roughness of a tissue facing side of surgical buttresses “B1, B2” may be minimized, thereby reducing friction between tissues and the surgical buttresses “B1, B2” during tissue manipulation; a flexing of the surgical buttresses “B1, B2” between attachment points thereof may be minimized, thereby limiting movement where the surgical buttresses “B1, B2” is not fastened to
cartridge assembly 18 and/oranvil assembly 20; a shape of each surgical buttresses “B1, B2” may be modified to conform to the topography of tissue facing surface ofcartridge assembly 18 and/oranvil assembly 20; and/or increase a width of a profile of surgical buttresses “B1, B2” to be wider than a width of therespective cartridge assembly 18 and/oranvil assembly 20 widths so that some lateral shifting of surgical buttresses “B1, B2” can occur without compromising reinforcement of the entire staple line. - Specifically, the surface roughness of the material of surgical buttresses “B1, B2” may be minimized by any number of means including calendaring, applying heat and pressure, adding a lubricious coating, or forming the material on a flat surface. In the case of melt blown synthetic fabrics the material of surgical buttresses “B1, B2” could be produced by blowing fibers onto a smooth heated belt to encourage relaxation of the fibers to conform to the heated surface. Minimizing buttress roughness reduces the interaction of the material of surgical buttresses “B1, B2” when being moved across tissue, thus reducing forces exerted on the surgical buttresses “B1, B2” which lead to movement of surgical buttresses “B1, B2”.
- Also, flexing or the flexibility of the material of surgical buttresses “B1, B2” may be minimized by increasing the material density, basis weight, or choosing a base material that has a high Young's modulus. In the case of melt blown synthetic fabrics, this can also be accomplished by calendaring with heated rollers to increase intra fiber bonding and to increase fiber packing Less material flexing equates to the surgical buttresses “B1, B2” moving less when forces are exerted thereon during tissue manipulation.
- Additionally, as seen in
FIGS. 51 and 52 , a topography of the surgical buttresses “B1, B2” may be shaped through heat and pressure when on therespective cartridge assembly 18 and/oranvil assembly 20, or staple reload, so that the surgical buttresses “B1, B2” conforms to the shape of the tissue facing surface of therespective cartridge assembly 18 and/oranvil assembly 20. This concept could include deforming the topography of the surgical buttresses “B1, B2” through pressure with a patterned press in such a way that the material is slightly deformed locally into the staple retaining pockets in thecartridge assembly 18 and into the staple forming pockets on theanvil assembly 20 and also into the knife slots in theanvil assembly 20 andcartridge assembly 18. These local deformations would increase the contact area between the buttress and cartridge and anvil surfaces and would thus make it more difficult to displace the surgical buttresses “B1, B2” during tissue manipulation. - Further, with continued reference to
FIGS. 51 and 52 , a profile of the surgical buttresses “B1, B2” may be made wider so that its edges (lateral or otherwise) extend partially around the circumference and beyond a lateral side edge of therespective cartridge assembly 18 and/oranvil assembly 20, or staple reload. This could be done in combination with heat and pressure to ensure conformance of the material of the surgical buttresses “B1, B2” to the tissue facing surface of therespective cartridge assembly 18 and/oranvil assembly 20 so that shifting (i.e., lateral shifting) is hindered. Additionally, if any shifting were to occur the extra width of the profiles of the surgical buttresses “B1, B2” would help ensure that the entire staple line is reinforced with buttress. - In addition to the foregoing, the surgical buttresses “B” may be fabricated from any biodegradable and/or non-biodegradable material, including polymers, that can be used in surgical procedures. The term “biodegradable” as used herein is defined to include both bioabsorbable and bioresorbable materials. By biodegradable, it is meant that the material decomposes, or loses structural integrity under body conditions (e.g., enzymatic degradation or hydrolysis) or is broken down (physically or chemically) under physiologic conditions in the body, such that the degradation products are excretable or absorbable by the body. Absorbable materials are absorbed by biological tissues and disappear in vivo at the end of a given period, which can vary, for example, from hours to several months, depending on the chemical nature of the material. It should be understood that such materials include natural, synthetic, bioabsorbable, and/or certain non-absorbable materials, as well as combinations thereof.
- Representative natural biodegradable polymers which may be used to form the medical devices include: polysaccharides such as alginate, dextran, chitin, chitosan, hyaluronic acid, cellulose, collagen, gelatin, fucans, glycosaminoglycans, and chemical derivatives thereof (substitutions and/or additions of chemical groups including, for example, alkyl, alkylene, amine, sulfate, hydroxylations, carboxylations, oxidations, and other modifications routinely made by those skilled in the art); catgut; silk; linen; cotton; and proteins such as albumin, casein, zein, silk, soybean protein; and combinations such as copolymers and blends thereof, alone or in combination with synthetic polymers.
- Synthetically modified natural polymers which may be used to form the medical devices include cellulose derivatives such as alkyl celluloses, hydroxyalkyl celluloses, cellulose ethers, cellulose esters, nitrocelluloses, and chitosan. Examples of suitable cellulose derivatives include methyl cellulose, ethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, hydroxybutyl methyl cellulose, cellulose acetate, cellulose propionate, cellulose acetate butyrate, cellulose acetate phthalate, carboxymethyl cellulose, cellulose triacetate, cellulose sulfate sodium salt, and combinations thereof.
- Representative synthetic biodegradable polymers which may be utilized to form medical devices include polyhydroxy acids prepared from lactone monomers (such as glycolide, lactide, caprolactone, ε-caprolactone, valerolactone, and δ-valerolactone), carbonates (e.g., trimethylene carbonate, tetramethylene carbonate, and the like), dioxanones (e.g., 1,4-dioxanone and p-dioxanone), 1,dioxepanones (e.g., 1,4-dioxepan-2-one and 1,5-dioxepan-2-one), and combinations thereof. Polymers formed therefrom include: polylactides; poly(lactic acid); polyglycolides; poly(glycolic acid); poly(trimethylene carbonate); poly(dioxanone); poly(hydroxybutyric acid); poly(hydroxyvaleric acid); poly(lactide-co-(ε-caprolactone-)); poly(glycolide-co-(ε-caprolactone)); polycarbonates; poly(pseudo amino acids); poly(amino acids); poly(hydroxyalkanoate)s such as polyhydroxybutyrate, polyhydroxyvalerate, poly(3-hydroxybutyrate-co-3-hydroxyvalerate), polyhydroxyoctanoate, and polyhydroxyhexanoate; polyalkylene oxalates; polyoxaesters; polyanhydrides; polyester anyhydrides; polyortho esters; and copolymers, block copolymers, homopolymers, blends, and combinations thereof.
- Synthetic degradable polymers also include hydrophilic vinyl polymers including phosphorylcholines such as 2-methacryloyloxyethyl phosphorylcholine, hydroxamates, vinyl furanones and their copolymers, and quaternary ammonia; as well as various alkylene oxide copolymers in combination with other polymers such as lactones, orthoesters, and hydroxybutyrates, for example.
- Rapidly bioerodible polymers, such as poly(lactide-co-glycolide)s, polyanhydrides, and polyorthoesters, which have carboxylic groups exposed on the external surface as the surface of the polymer erodes, may also be used.
- Other biodegradable polymers include polyphosphazenes; polypropylene fumarates; polyimides; polymer drugs such as polyamines; perfluoroalkoxy polymers; fluorinated ethylene/propylene copolymers; PEG-lactone copolymers; PEG-polyorthoester copolymers; blends and combinations thereof.
- Some non-limiting examples of suitable nondegradable materials from which the medical devices may be made include metals, ceramics, and polymeric materials. Suitable nondegradable polymeric materials include, for example, polyolefins such as polyethylene (including ultra high molecular weight polyethylene) and polypropylene including atactic, isotactic, syndiotactic, and blends thereof; polyethylene glycols; polyethylene oxides; polyisobutylene and ethylene-alpha olefin copolymers; fluorinated polyolefins such as fluoroethylenes, fluoropropylenes, fluoroPEGSs, and polytetrafluoroethylene; polyamides such as nylon, Nylon 6, Nylon 6,6,
Nylon 6,10, Nylon 11,Nylon 12, and polycaprolactam; polyimines; polyesters such as polyethylene terephthalate, polyethylene naphthalate, polytrimethylene terephthalate, and polybutylene terephthalate; polyethers; polybutester; polytetramethylene ether glycol; 1,4-butanediol; polyurethanes; acrylic polymers; methacrylics; vinyl halide polymers such as polyvinyl chloride; polyvinyl alcohols; polyvinyl ethers such as polyvinyl methyl ether; polyvinylidene halides such as polyvinylidene fluoride and polyvinylidene chloride; polychlorofluoroethylene; polyacrylonitrile; polyaryletherketones; polyvinyl ketones; polyvinyl aromatics such as polystyrene; polyvinyl esters such as polyvinyl acetate; etheylene-methyl methacrylate copolymers; acrylonitrile-styrene copolymers; ABS resins; ethylene-vinyl acetate copolymers; alkyd resins; polycarbonates; polyoxymethylenes; polyphosphazine; epoxy resins; aramids; rayon; rayon-triacetate; spandex; silicones; and copolymers and combinations thereof. - It will be understood that various modifications may be made to the embodiments disclosed herein. For example, the stapling apparatus need not apply staples but rather may apply two part fasteners as is known in the art. Further, the length of the linear row of staples or fasteners may be modified to meet the requirements of a particular surgical procedure. Thus, the length of a single stroke of the actuation shaft and/or the length of the linear row of staples and/or fasteners within a disposable loading unit may be varied accordingly. Therefore, the above description should not be construed as limiting, but merely as exemplifications of preferred embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the claims appended thereto.
Claims (20)
1. A surgical stapling apparatus, comprising:
a housing;
a handle supported by the housing;
an elongated body extending distally from the housing;
a tool assembly at the distal end of the elongated body, the tool assembly including:
a cartridge assembly including a staple cartridge having a tissue facing surface, a plurality of staple retaining pockets and a knife slot formed in the tissue facing surface thereof;
a plurality of surgical fasteners loaded one each in the staple retaining pockets; and
an anvil assembly in juxtaposed relation to the cartridge assembly, the anvil assembly including an anvil plate having a tissue facing surface defining a plurality of staple forming pockets and a knife slot therein, at least one of the cartridge assembly or the anvil assembly being movable in relation to the other of the cartridge assembly and the anvil assembly; and
a surgical buttress attached to the tissue facing surface of at least one of the cartridge assembly or the anvil assembly, the surgical buttress conforming to the tissue facing surface such that the surgical buttress is deformed locally into the staple retaining pockets and the knife slot of the cartridge assembly or the staple forming pockets and the knife slot of the anvil assembly to which the surgical buttress is attached, thereby increasing the contact area between the surgical buttress and the tissue facing surface.
2. The surgical stapling apparatus according to claim 1 , wherein the surgical buttress has a width that is wider than a width of the respective cartridge assembly or anvil assembly to which the surgical buttress is attached.
3. The surgical stapling apparatus according to claim 2 , wherein lateral edges of the surgical buttress extend partially around a circumference and beyond a lateral side edge of the respective cartridge assembly or anvil assembly to which the surgical buttress is attached.
4. The surgical stapling apparatus according to claim 1 , wherein the surgical buttress is nonwoven.
5. The surgical stapling apparatus according to claim 4 , wherein the surgical buttress is absorbable.
6. The surgical stapling apparatus according to claim 1 , wherein the surgical buttress is a non-woven, absorbable felt.
7. The surgical stapling apparatus according to claim 1 , wherein the surgical buttress is secured to at least one of the cartridge assembly or the anvil assembly by at least one anchor.
8. The surgical stapling apparatus according to claim 7 , wherein the anchor is selected from the group consisting of sutures, threads, tethers, straps, bands, lines, wires, cables, fasteners, and tacks.
9. The surgical stapling apparatus according to claim 7 , further comprising:
a release assembly associated with the at least one of the cartridge assembly or the anvil assembly to which the surgical buttress is attached; and
a drive assembly slidably translatable through the tool assembly from a proximal position to a distal position, wherein the drive assembly actuates the release assembly to thereby release the anchor and to free the surgical buttress from the at least one of the cartridge assembly or the anvil assembly.
10. A loading unit for use with a surgical stapling apparatus, the loading unit comprising:
a tool assembly including:
a cartridge assembly including a staple cartridge having a tissue facing surface, a plurality of staple retaining pockets and a knife slot formed in the tissue facing surface thereof;
a plurality of surgical fasteners loaded one each in the staple retaining pockets; and
an anvil assembly in juxtaposed relation to the cartridge assembly, the anvil assembly including an anvil plate having a tissue facing surface defining a plurality of staple forming pockets and a knife slot therein, at least one of the cartridge assembly or the anvil assembly being movable in relation to the other of the cartridge assembly and the anvil assembly; and
a surgical buttress attached to the tissue facing surface of at least one of the cartridge assembly or the anvil assembly, the surgical buttress conforming to the tissue facing surface such that the surgical buttress is deformed locally into the staple retaining pockets and the knife slot of the cartridge assembly or the staple forming pockets and the knife slot of the anvil assembly to which the surgical buttress is attached, thereby increasing the contact area between the surgical buttress and the tissue facing surface.
11. The loading unit according to claim 10 , wherein the surgical buttress has a width that is wider than a width of the respective cartridge assembly or anvil assembly to which the surgical buttress is attached.
12. The loading unit according to claim 11 , wherein lateral edges of the surgical buttress extend partially around a circumference and beyond a lateral side edge of the respective cartridge assembly or anvil assembly to which the surgical buttress is attached.
13. The loading unit according to claim 10 , wherein the surgical buttress is nonwoven.
14. The loading unit according to claim 13 , wherein the surgical buttress is absorbable.
15. The loading unit according to claim 10 , wherein the surgical buttress is a non-woven, absorbable felt.
16. The loading unit according to claim 10 , wherein the surgical buttress is secured to at least one of the cartridge assembly or the anvil assembly by at least one anchor.
17. The loading unit according to claim 16 , wherein the anchor is selected from the group consisting of sutures, threads, tethers, straps, bands, lines, wires, cables, fasteners, and tacks.
18. The loading unit according to claim 16 , wherein at least one of the staple cartridge or the anvil plate includes a pair of recesses that frictionally engage the anchor.
19. A method of securing a surgical buttress to at least one of a cartridge assembly or an anvil assembly, the method comprising:
applying a surgical buttress to a tissue facing surface of at least one of a cartridge assembly or an anvil assembly;
applying at least one of heat or pressure on the respective cartridge assembly or anvil assembly so that the surgical buttress conforms to the shape of the tissue facing surface by deforming the surgical buttress into staple retaining pockets and a knife slot of the cartridge assembly or staple forming pockets and a knife slot of the anvil assembly to which the surgical buttress is applied, thereby increasing the contact area between the surgical buttress and the tissue facing surface.
20. The method according to claim 19 , wherein the step of applying at least one of heat or pressure further includes the step of applying pressure with a patterned press.
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CA2843705A CA2843705C (en) | 2013-02-28 | 2014-02-21 | Adherence concepts for non-woven absorbable felt buttresses |
EP14157195.0A EP2772197B1 (en) | 2013-02-28 | 2014-02-28 | Adherence concepts for non-woven absorbable felt buttresses |
US16/012,224 US10722234B2 (en) | 2013-02-28 | 2018-06-19 | Adherence concepts for non-woven absorbable felt buttresses |
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US14/172,036 US20140239047A1 (en) | 2013-02-28 | 2014-02-04 | Adherence concepts for non-woven absorbable felt buttresses |
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Also Published As
Publication number | Publication date |
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AU2014200793A1 (en) | 2014-09-11 |
US20180296214A1 (en) | 2018-10-18 |
EP2772197A1 (en) | 2014-09-03 |
CA2843705A1 (en) | 2014-08-28 |
AU2014200793B2 (en) | 2018-08-23 |
EP2772197B1 (en) | 2022-06-15 |
CA2843705C (en) | 2021-03-02 |
US10722234B2 (en) | 2020-07-28 |
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