US 9,010,612 B2Grant
Buttress support design for EEA anvil
Issue Date:2015-04-21
•26 Claims
•12 Drawing Sheets
Abstract
An apparatus for joining two hollow organ sections with an annular array of surgical staples includes a staple cartridge, an anvil, a buttress member, and a buttress mount. In particular, the staple cartridge includes a plurality of surgical staples in an annular array. The anvil includes an anvil member and a shaft extending therefrom. The anvil member defines a plurality of staple pockets for deforming the surgical staples. The anvil is movable relative to the staple cartridge component between spaced apart and approximated positions to adjustably clamp tissue between the staple cartridge and the anvil. The buttress member is concentrically aligned with the plurality of staple pockets defined in the anvil member. The buttress mount is detachably secured with the shaft of the anvil. The buttress mount includes at least one support member radially extending outward to secure the buttress member to the anvil member.
Metadata
Assignee
- Covidien LP
Inventors
- Richard P. Stevenson
- Thomas Casasanta, Jr.
- Sally Carter
Application Information
Application Number:US 13/358,544
Filing Date:2012-01-26
Priority Date:2012-01-26
Art Unit:3721
Classifications
IPC:
A61B17/068A61B17/072A61B17/115
Patent Drawings (12 sheets)
Description
Background
[0001] 1. Technical Field
[0002] The present disclosure relates to a surgical instrument for applying surgical fasteners or staples to body tissue, and more particularly, to a surgical buttress assembly for use with an end-to-end anastomosis stapling apparatus.
[0003] 2. Background of Related Art
[0004] Anastomosis is a surgical joining of separate hollow organ sections. Typically, an anastomosis procedure follows surgery in which a diseased or defective section of hollow tissue is removed and the remaining end sections are joined. Depending on the desired anastomosis procedure, the end sections may be joined by either circular, end-to-end or side-to-side organ reconstruction methods.
[0005] In a circular anastomosis procedure, the two ends of the organ sections are joined by means of a stapling instrument which drives a circular array of staples through the end section of each organ section and simultaneously cores any tissue interior of the driven circular array of staples to free the tubular passage. Typically, these instruments include an elongated shaft having a handle portion at a proximal end to actuate the instrument and a staple holding component disposed at a distal end. An anvil assembly including an anvil shaft with attached anvil head is mounted to the distal end adjacent the staple holding component. Opposed end sections of the organ to be stapled are clamped between the anvil head and the staple holding component. The clamped tissue is stapled by driving a plurality of staples from the staple holding component so that the ends of the staples pass through the tissue and are deformed by the anvil head.
[0006] In use, one end section of the organ is secured about the anvil assembly and the other end section of the organ is held in place adjacent the staple holding component. The shaft of the anvil assembly is removably connected to the instrument. Once the anvil shaft is secured to the instrument, the anvil is drawn into close approximation to the staple holding component. The instrument is then fired to cause the staples to pass through tissue of both sections of the organ and deform against the anvil. During the firing step, a circular knife is advanced to cut tissue inside the staple line, thereby establishing a passage between the two sections of the organ. After firing, the instrument is typically removed by withdrawing the anvil through the staple line, after which the surgeon will carefully inspect the surgical site to ensure a proper anastomosis has been achieved.
[0007] While circular staplers are helpful in a number of surgical procedures, problems such as anastomotic leak, tearing of tissue during stapler extraction, bleeding, and other complications may arise. In order to remedy such problems, buttress or reinforcing materials have been utilized. However, due to the inherent difficulty in positioning and securing such materials with the instrument, a need exists for the buttress material that can be safely and effectively positioned with the anvil.
Summary
[0008] In accordance with an embodiment of the present disclosure, there is provided an apparatus for joining two hollow organ sections with an annular array of surgical staples. The apparatus includes a staple cartridge component, an anvil component, a buttress member and a buttress mount. The staple cartridge component includes a plurality of surgical staples in an annular array. The anvil component includes an anvil member and a shaft extending therefrom. The anvil member defines a plurality of staple pockets for deforming the surgical staples. The anvil component is movable relative to the staple cartridge component between spaced apart and approximated positions to adjustably clamp tissue between the staple cartridge and anvil components. The buttress member is concentrically aligned with the plurality of staple pockets defined in the anvil member. The buttress mount is detachably secured with the shaft of the anvil component. The buttress mount includes at least one support member radially extending outward to secure the buttress member to the anvil member. The buttress mount at least partially underlying the buttress member to provide support thereto.
[0009] In an embodiment, the buttress mount may further include an annular ring member from which the at least one support member radially extends outward. The annular ring member may be configured and dimensioned to receive the shaft of the anvil component therethrough. The at least one support member may be disposed radially inward of the plurality of staple pockets. A radially outer peripheral portion of the at least one support member may be flush with a peripheral edge of the anvil member. The at least one support member may also extend radially outward of at least one of the annular rows of staple pockets. Alternatively, the at least one support member may at least partially overlie at least one of the annular rows of staple pockets.
[0010] The at least one support member may have a radially varying thickness. The buttress member may have an annular configuration. In particular, the buttress member may be disposed in a juxtaposed relation with the plurality of staple pockets. The buttress mount may engage a proximal surface of the buttress member. Alternatively, the buttress mount may engage a distal surface of the buttress member. The buttress member may be made of a biodegradable material. The anvil member may define a recess configured and dimensioned to receive the buttress mount therein to provide securement of the buttress mount therein. The at least one support member of the buttress mount may engage an inner wall of the recess to provide securement of the buttress mount thereagainst. The buttress member and the buttress mount may be monolithically formed as a single construct. In addition, the apparatus may further include a knife member concentrically arranged with the plurality of surgical staples in the staple cartridge component. The knife member may be movable relative to the staple cartridge component. In particular, the at least one support member of the buttress mount may be disposed radially inward of the knife member when the knife member engages the buttress member.
[0011] In accordance with another embodiment of the present disclosure, there is provided an apparatus for joining two hollow organ sections with an annular array of surgical staples. The apparatus includes a staple cartridge component, an anvil component, a knife member, a buttress member, and a buttress mount. The staple cartridge component includes a plurality of surgical staples in an annular array. The anvil component defines a plurality of staple pockets for deforming the surgical staples. The anvil component is movable relative to the staple cartridge component between spaced apart and approximated positions to adjustably clamp tissue between the staple cartridge and anvil components. The knife member is concentrically arranged with the plurality of surgical staples in the staple cartridge component. The knife member is movable relative to the staple cartridge component. The buttress member is concentrically aligned with the anvil component. The buttress mount is detachably secured with the anvil component. The buttress mount includes a core ring, an outer ring, and at least one spoke extending between and interconnecting the core ring and the outer ring. The buttress mount is configured and adapted to secure the buttress member with the anvil member. The buttress mount at least partially underlying the buttress member to provide support thereto.
[0012] In an embodiment, the buttress member may be concentrically aligned with the plurality of staple pockets. The outer ring may at least partially overlap the plurality of staple pockets in the annular array. The buttress mount may engage a proximal surface of the buttress member. The buttress mount may engage a distal surface of the buttress member. The outer ring may be disposed radially inward of the knife member when the knife member is actuated to engage the buttress member.
[0013] In accordance with still another embodiment of the present disclosure, there is provided an apparatus for joining two hollow organ sections with an annular array of surgical staples. The apparatus includes a handle assembly, an elongate tubular member, a staple cartridge component, an anvil component, a knife member, a buttress member, and a buttress mount. The handle assembly includes a firing trigger. The elongate tubular member extends distally from the handle assembly. The staple cartridge component is coupled to a distal portion of the elongate tubular member. The staple cartridge component includes a plurality of surgical staples in an annular array. The anvil component defines a plurality of staple pockets for deforming the surgical staples. The anvil component is movable relative to the staple cartridge component between spaced apart and approximated positions to clamp tissue between the staple cartridge and anvil components. The knife member is concentrically arranged with the plurality of surgical staples in the staple cartridge component. The knife member is movable relative to the staple cartridge component. The buttress member is concentrically aligned with the anvil component. The buttress mount is detachably secured with the anvil component. The buttress mount includes at least one support member radially extending outward, from a shaft of the anvil component when the buttress mount is mounted on the anvil component to secure the buttress member to the anvil component. The buttress mount at least partially underlies the buttress member to provide support thereto.
[0014] In an embodiment, the buttress mount may further include an annular ring member from which the at least one support member radially extends outward. The at least one support member may be disposed radially inward of the plurality of staple pockets. A peripheral portion of the at least one support member may be flush with a peripheral edge of the anvil member. The at least one support member may extend radially outward of at least one of the annular rows of staple pockets. The at least one support member may at least partially overlie at least one of the annular rows of staple pockets.
Brief Description of the Drawings
[0015] Various embodiments of the present disclosure are described hereinbelow with reference to the drawings, wherein:
[0016] FIG. 1 is a perspective view of an annular surgical stapling apparatus configured for use with a surgical buttress assembly in accordance with an embodiment of the present disclosure, illustrating an anvil assembly and the buttress assembly detached from the surgical stapling apparatus;
[0017] FIG. 2 is an exploded perspective view of the anvil assembly and the buttress assembly of the surgical stapling apparatus of FIG. 1 with parts separated;
[0018] FIG. 3 is a perspective view of the anvil assembly of FIG. 2 having the buttress assembly of FIG. 2 mounted thereon;
[0019] FIG. 4 is a cutaway perspective view of the area of detail indicated in FIG. 3 ;
[0020] FIG. 5 is an exploded perspective view of the anvil assembly and the buttress assembly of FIG. 2 with parts separated, illustrating invertible use of the buttress assembly;
[0021] FIG. 6 is a perspective view of the anvil assembly of FIG. 5 having the buttress assembly of FIG. 5 mounted thereon;
[0022] FIG. 7 is an exploded perspective view of the anvil assembly of FIG. 1 and a buttress assembly in accordance with another embodiment of the present disclosure, with parts separated;
[0023] FIG. 8 is a perspective view of the anvil assembly of FIG. 1 having a buttress assembly in accordance with another embodiment of the present disclosure mounted thereon;
[0024] FIG. 9 is a cutaway perspective view of the area of detail indicated in FIG. 8 ;
[0025] FIG. 10 is a perspective view of the anvil assembly of FIG. 1 having a buttress assembly in accordance with another embodiment of the present disclosure mounted thereon;
[0026] FIG. 11 is a cutaway perspective view of the area of detail indicated in FIG. 10 ;
[0027] FIG. 12 is an exploded perspective view of the anvil assembly of FIG. 1 and a buttress assembly in accordance with another embodiment of the present disclosure with parts separated;
[0028] FIG. 13 is a side cross-sectional view of a buttress assembly of FIG. 12 taken along section line 13-13 in FIG. 12 ;
[0029] FIG. 14 is a perspective view of the annular surgical apparatus of FIG. 1 , illustrating insertion of the apparatus through two hollow organ sections;
[0030] FIG. 15 is an enlarged, partial longitudinal cross-sectional view of a head portion of the apparatus of FIG. 14 ;
[0031] FIG. 16 is an enlarged view of the area of detail indicated in FIG. 15 ; and
[0032] FIG. 17 is an enlarged, partial longitudinal cross-sectional view of the head portion of the apparatus of FIG. 15 , illustrating stapling and cutting of the two hollow organ sections.
Detailed Description of Embodiments
[0033] Embodiments of the present disclosure 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. As used herein, the term “distal,” as is conventional, will refer to that portion of the instrument, apparatus, device or component thereof which is farther from the user while, the term “proximal,” will refer to that portion of the instrument, apparatus, device or component thereof which is closer to the user. In the following description, well-known functions or constructions are not described in detail to avoid obscuring the present disclosure in unnecessary detail.
[0034] With reference to FIG. 1 , a surgical stapling apparatus 10 for performing circular anastomosis of hollow organs is shown. Surgical stapling apparatus 10 drives a circular array of staples 7 (FIG. 15 ) through the end sections of each organ and simultaneously fires an annular knife 76 (FIG. 15 ) to sever any tissue interior of the driven circular array of staples 7 to free the tubular passage, and thereby joining two ends of the organ. Surgical stapling apparatus 10 includes a handle assembly 20 having a pair of pivotable actuating handle members 22 and an advancing means 24 including a rotatable grip member 26, an elongate body portion 30 extending distally from handle assembly 20, and a head portion 50 including an anvil assembly 60, a staple cartridge assembly 70, and a surgical buttress assembly 100 in accordance with an embodiment of the present disclosure. The components of surgical apparatus 10 are generally formed from thermoplastics including polycarbonates, and metals including stainless steel and aluminum. The particular material selected to form a particular component will depend upon the strength requirements of the particular component. Staples 7 are of a conventional type and include a backspan having a pair of legs extending from the backspan. The legs terminate in tissue penetrating tips.
[0035] Handle assembly 20 can be actuated to approximate anvil assembly 60 relative to staple cartridge assembly 70 and to apply a pair of annular arrays of staples 7 through tissue. In order to properly position tissue in head portion 50, rotatable grip member 26 may be rotated to move anvil assembly 60 axially relative to staple cartridge assembly 70 between a spaced apart position and an approximated position in which anvil assembly 60 is positioned adjacent staple cartridge assembly 70 to clamp tissue therebetween. Handle members 22 may be squeezed to fire staples 7 through tissue to join two segments “T1,” “T2” (FIG. 14 ) of tubular tissues together, as will be discussed in detail below.
[0036] Elongate body portion 30 is constructed to have a slightly curved/bent shape along its length. However, elongate body portion 30 may also be straight, as well as flexible to bend to any configuration. The length, shape and/or the diameter of elongate body portion 30 may be varied to suit a particular surgical procedure.
[0037] With reference to FIGS. 1-4 , head portion 50 includes, a staple cartridge assembly 70, an anvil assembly 60 and a surgical buttress assembly 100 detachably secured with anvil assembly 60. Staple cartridge assembly 70 may be fixedly connected to a distal end portion of elongate body portion 30 or may be configured to concentrically fit within the distal end portion of elongate body portion 30. In particular, staple cartridge assembly 70 defines a pair of annular arrays of staple receiving slots 72 (FIG. 15 ) having a staple 7 disposed in each one of staple receiving slots 72. In addition, staple cartridge assembly 70 includes a cylindrical knife 76 concentrically arranged with the pair of annular array of staples 7 and a plurality of staple pushers 9 (FIG. 15 ) each disposed in staple receiving slot 72 to eject staple 7 through slot 72. Staples 7 travel through slots 72 and tissue toward anvil assembly 60.
[0038] With brief reference to FIG. 15 , cylindrical knife 76 includes a distal rim 79 defining a knife blade adapted to cut tissue and portions of surgical buttress assembly 100. Upon actuation of handle members 22, cylindrical knife 76 is moved distally to cut tissue and portions of surgical buttress assembly 100, and the plurality of pushers 9 are moved distally to eject staples 7 from the staple receiving slots 72 toward anvil assembly 60.
[0039] With particular reference back to FIG. 2 , positioned distally of staple cartridge assembly 70 is anvil assembly 60 including an anvil member 62 and a shaft 64 extending proximally from anvil member 62. Anvil member 62 includes a plurality of staple pockets 65 for receiving and deforming staples 7. Shaft 64 is configured to be detachably received in approximation shaft 75 (FIG. 1 ) disposed in elongate body portion 30. Approximation shaft 75 is operatively coupled with rotatable grip member 26 of handle assembly 20, whereby rotation of rotatable grip member 26 moves approximation shaft 75 axially. Such axial movement of approximation shaft 75 is imparted to anvil assembly 60. In this manner, anvil assembly 60 is movable axially relative to staple cartridge assembly 70 between a spaced apart position and an approximated position in which anvil assembly 60 is positioned adjacent staple cartridge assembly 70 to adjustably clamp tissue between anvil assembly 60 and staple cartridge assembly 70.
[0040] Examples of instruments for performing circular anastomosis of hollow organs are described in U.S. Pat. Nos. 6,053,390, 5,588,579, 5,119,983, 5,005,749, 4,646,745, 4,576,167, and 4,473,077, each of which is hereby incorporated herein in its entirety by reference.
[0041] With continued reference to FIGS. 2-4 , a buttress member 110 and a buttress mount 120 are concentrically arranged with one another. Buttress member 110 is provided to reinforce and seal staple lines applied to tissue by surgical stapling apparatus 10.
[0042] Buttress member 110 is fabricated from a biocompatible material which is bio-absorbable or non-absorbable, and can also be made from natural or synthetic materials. It should be understood that any combination of natural, synthetic, bio-absorbable, and non-bioabsorbable materials may be used to form buttress member 110.
[0043] In addition, buttress member 110 may be porous, non-porous, or combinations thereof. It is also envisioned that buttress member 110 described herein may contain a plurality of layers in which any combination of non-porous and porous layers may be configured. For example, buttress member 110 may be formed to include multiple non-porous layers and porous layers that are stacked in an alternating manner. In another example, buttress member 110 may be formed in a “sandwich-like” manner wherein the outer layers of buttress member 110 include porous layers and the inner layers are non-porous layers. Examples of multi-layered buttress members are disclosed in U.S. Patent Application Publication No. 2009/0001122, filed on Jun. 27, 2007, entitled “Buttress and Surgical Stapling Apparatus,” the entire disclosure of which is hereby incorporated by reference therein.
[0044] In particular, the use of non-porous layers in buttress member 110 may enhance the ability of buttress member 110 to resist tears and perforations during the manufacturing, shipping, handling, and stapling processes. In addition, the use of a non-porous layer in the surgical buttress may also retard or inhibit tissue ingrowth from surrounding tissues, and thereby act as an adhesion barrier and/or inhibit the formation of unwanted scar tissue.
[0045] In addition, at least one bioactive agent may be combined with buttress member 110. The agent may be disposed on a surface of the surgical buttress and/or impregnated therein. In these embodiments, buttress member 110 can also serve as a vehicle for delivery of the bioactive agent. The term “bioactive agent,” as used herein, is used in its broadest sense and includes any substance or mixture of substances that have clinical use.
[0046] With continued reference to FIGS. 2-4 , buttress member 110 has an annular profile configured to be concentrically aligned with anvil assembly 60. In particular, buttress member 110 is mounted on a proximal surface 66 of anvil assembly 60, and buttress mount 120 is disposed proximal of buttress member 110. The annular profile of buttress member 110 is configured and dimensioned to at least be flush with an outer peripheral edge of anvil member 62 when mounted on anvil assembly 60.
[0047] Buttress mount 120 includes a core ring 122 and support arms 124 radially extending outward from core ring 122. Support arms 124 are circumferentially arranged about core ring 122 and are configured and dimensioned to be affixed to a proximal surface 112 of buttress member 110 by, for example, over molding, ultrasonic welding, melt pressing or melt pressing in conjunction with other polymers or with adhesives. Core ring 122 includes a hole 123 configured and dimensioned to receive shaft 64 of anvil assembly 60 therethrough when being mounted to anvil assembly 60. In particular, hole 123 is configured and dimensioned to provide a tight or friction fit against shaft 64 to enable securement of buttress member 110 between anvil member 62 and buttress mount 120. It is contemplated that core ring 122 may be configured as a split ring (i.e., including a break along a length thereof) to accommodate various diameter shafts.
[0048] Other shapes for the buttress support are contemplated, and the buttress support may incorporate straight or curved members having a variety of cross-sectional shapes.
[0049] With particular reference now to FIG. 4 , buttress member 110 is in a superposed relation with the pair of annular arrays of staple pockets 65 defined in anvil member 62. In particular, radially extending support arms 124 of buttress mount 120 are configured and sized to terminate radially inward of the pair of annular arrays of staple pockets 65, such that when staples 7 are ejected through the pair of annular arrays of staple receiving slots 72, the legs of each staple 7 penetrate through tissue and buttress member 110 into staple pockets 65. Under such a configuration, support arms 124 of buttress mount 120 are not affected by the staple formation and, likewise, the support arms do not affect the staple formation. In this manner, upon actuation of handle members 22, a portion of buttress member 110 is stapled with tissue to reinforce tissue, and the remaining portions of buttress member 110 and buttress mount 120 are cut and detached from the portion of buttress member 110 stapled with tissue. However, it is also contemplated that support arm 124 may be configured and sized to terminate radially inward of cylindrical knife 76 when cylindrical knife 76 is actuated to cut tissue and buttress mount 120. In this manner, severing of support arm 124 by cylindrical knife 76 may be eliminated.
[0050] With reference now to FIGS. 5 and 6 , it is also envisioned that buttress assembly 100 may be used in an inverted position. Specifically, buttress mount 120 is secured with buttress member 110, by any of the methods described hereinabove, so that the buttress mount 120 is arranged distal of buttress member 110. Furthermore, buttress mount 120 may be configured and dimensioned to be received in a recess 67 defined in anvil member 62. Additionally or alternatively, a hole 123 defined by core ring 122 provides a tight fit against shaft 64 of anvil assembly 60. Moreover, support arms 124 are configured and dimensioned to provide a tight fit with a peripheral edge of recess 67, which further improves the securement of buttress member 110 with anvil assembly 60.
[0051] The distal arrangement of buttress mount 120 with respect to buttress member 110 can provide a flat surface contact between buttress member 110 and the proximal surface 66 of anvil member 62, to thereby further enhance staple formation through tissue.
[0052] With reference now to FIG. 7 , it is also envisioned that buttress member 110 may be supported by a pair of buttress mounts 520a, 520b. In particular, buttress mount 520a is arranged distal of buttress member 110, and buttress mount 520b is arranged proximal of buttress member 110. Buttress mounts 520a, 520b are attached to buttress member 110 by any of the methods described hereinabove. Buttress mounts 520a, 520b are substantially identical to buttress mount 120 described hereinabove, and thus will not be described herein in the interest of brevity. Buttress mounts 520a, 520b are substantially identical and as such, buttress assembly 500 may be used interchangeably. Holes 523 of respective buttress mounts 520a, 520b are configured and dimensioned to receive shaft 64 of anvil assembly 60 therethrough to provide a tight or friction fit therewith. In addition, buttress mount 520a include support arms 524 radially extending outward from core ring 522 to provide a tight fit around the peripheral edge of recess 67 of anvil assembly 60 to further improve securement of buttress member 110 with anvil assembly 60. The entire assembly may be inverted, and buttress mount 520b may also include support arms 524 configured and dimensioned to provide a tight fit against the peripheral edge of recess 67 of anvil assembly 60. While support arms 524 of buttress mount 520a are shown to be in radial registration with support arms 524 of buttress mount 520b, it is contemplated that support arms 524 of buttress mounts 520a, 520b may be out of radial registration with one another. The buttress mounts 520a and 520b may have different configurations including arms that are curved or straight, having a variety of cross-sectional shapes. The configuration of buttress mount 520a may be different from the configuration of buttress mount 520b.
[0053] With reference to FIGS. 8 and 9 , it is further contemplated that a buttress mount 220 may include support arms 224 that radially extend outward from a core ring 222 and that are substantially flush with an outer peripheral edge of anvil member 62 when mounted on anvil assembly 60. Under such a configuration, a portion of each support arm 224 is stapled to tissue to reinforce tissue, and the remaining portions (i.e., portions radially inward of cylindrical knife 76) of buttress member 110 and buttress mount 120 are cut and detached from the portion of buttress member 110 that is stapled to tissue.
[0054] By providing a greater area of contact between buttress member 110 and support arms 224, the force applied to buttress member 110 by support arms 224 is more evenly distributed throughout buttress member 110, which may inhibit tearing or damage to buttress member 110. Under such a configuration, it is further contemplated that support arms 224 may have varying thickness. In particular, a portion of support arm 224 that is stapled to tissue may have a minimal thickness, e.g., a thickness substantially smaller than the thickness of a portion of support arm 224 adjacent core ring 222, such that any effect of the thickness of support arms 224 on staple formation is minimized. In addition, it is further envisioned that the portion of support arms 224 that are stapled with buttress member 110 may be formed of bioabsorbable and/or biodegradable material.
[0055] With reference to FIGS. 10 and 11 , a buttress mount 320 in accordance with another embodiment of the present disclosure is illustrated. Buttress mount 320 includes a core ring 322 configured and dimensioned to receive shaft 64 of anvil assembly 60 therethrough, an outer ring 326 concentrically arranged with core ring 322 and spokes 324 radially extending outward from core ring 322 to outer ring 326, thereby interconnecting core ring 322 and outer ring 326. Outer ring 326 provides additional support for buttress member 110 against anvil member 62. In particular, outer ring 326 may greatly reduce the potential for buttress member 110 to fold over, dislodge or separate from anvil assembly 60. In particular, the force applied to buttress member 110 by buttress mount 320 is more evenly distributed throughout buttress member 110, which may inhibit tear or damage to buttress member 110.
[0056] With particular reference to FIG. 11 , outer ring 326 is at least partially disposed in the staple formation portion of buttress member 110, whereby only a portion of outer ring 326 is stapled to buttress member 110 and tissue, and the remaining portions of outer ring 326 are cut and detached from the portion of buttress member 110 stapled to tissue. As discussed hereinabove with respect to support arm 224, outer ring 326 may have a minimal thickness at a peripheral portion thereof to minimize interference with staple formation. Additionally, outer ring 326 and/or buttress mount 320, as a whole, may be made of biodegradable and/or bioabsorbable material, such that the portion of outer ring 326 that is stapled to buttress member 110 and tissue is degraded over time. Alternatively, the outer ring 326 can be positioned inwardly of the staple line, or inwardly of the cut line.
[0057] With reference to FIGS. 12 and 13 , while buttress mounts 120, 220, 320 and buttress member 110 have been described hereinabove as separate components that are attached to each other by the methods describe hereinabove, it is also envisioned that buttress member and buttress support may be monolithically formed as a single construct. Monolithically formed buttress assembly 400 defines a common through hole 423 configured and dimensioned to receive shaft 64 of anvil assembly 60 therethrough to provide a tight fit therewith. Alternatively, the buttress member and buttress support can be formed from different materials that are bonded or otherwise attached to one another.
[0058] With reference now to FIGS. 14-17 , surgical stapling apparatus 10 is used in an anastomosis procedure to effect joining of, for example, two opposing intestinal sections “T1,” “T2.” The anastomosis procedure is typically performed using minimally invasive surgical techniques including laparoscopic means and instrumentation. Initially, a diseased intestinal section is removed. Thereafter, anvil assembly 60 is inserted to the operative site either through a surgical incision or transanally and is positioned within the intestinal section “T1.” Elongate body portion 30 of surgical stapling apparatus 10 including staple cartridge assembly 70 is inserted transanally into the other intestinal section “T2.” Intestinal sections “T1,” “T2” are then temporarily secured about their respective components (e.g., shaft 64 of anvil assembly 60 and the distal end of elongate body portion 30) by conventional means such as a purse string suture “P.”
[0059] Thereafter, the clinician maneuvers anvil assembly 60 until the proximal end of shaft 64 is inserted into the distal end of approximation shaft 75 disposed in elongate body portion 30 of surgical stapling apparatus 10. Shaft 64 engages approximation shaft 75 to be operable as a unitary construct, as shown in FIG. 15 . Anvil assembly 60 and elongate body portion 30 are then approximated to approximate intestinal sections “T1,” “T2,” as shown in FIG. 17 . Surgical stapling apparatus 10 is then fired, effecting stapling of intestinal sections “T1,” “T2” to one another, while cylindrical knife 76 cuts a portion of buttress member 110 and tissue disposed radially inward of cylindrical knife 76, and thereby detaching buttress mount 320 and an inner portion of buttress member 110 from the portion of buttress member 110 that is clamped (approximated) between distal surface 74 of staple cartridge assembly 70 and proximal surface 66 of anvil assembly 60 to complete the anastomosis.
[0060] In a further embodiment, a buttress member can be superposed in relation with the annular rows of staple slots defined in the staple cartridge assembly 70. In a particular example, radially extending support arms of buttress mount are attached to a core ring and are configured and sized to terminate radially inward of the pair of annular rows of staple slots 72 (see FIG. 15 ), such that when staples 7 are ejected through the pair of annular arrays of staple receiving slots 72, the legs of each staple 7 penetrate through tissue and buttress member into staple pockets 65. Alternatively, the support arms can terminate adjacent the rows of staple slots 72. Upon actuation of handle members 22, a portion of buttress member is stapled with tissue to reinforce tissue, and the remaining portions of buttress member and/or buttress mount are cut and detached from the portion of buttress member stapled with tissue. The support arms can be configured to engage the inner surface of a recess in the staple cartridge assembly. Additionally or alternatively, the core ring of the buttress support frictionally engages the shaft. In addition, in certain embodiments, a pair of buttress supports can be used to mount the buttress member on the staple cartridge, as discussed above.
[0061] Although the illustrative embodiments of the present disclosure have been described herein with reference to the accompanying drawings, the above description, disclosure, and figures should not be construed as limiting, but merely as exemplifications of particular embodiments. For example, buttress member and buttress support may be secured with approximation shaft 75 disposed in staple cartridge assembly 70, whereby buttress assembly 100 is in a superposed relation with a tissue contacting surface of staple cartridge assembly 70. It is to be understood, therefore, that the disclosure is not limited to those precise embodiments, and that various other changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the disclosure.
Claims
What is claimed is:
1. An apparatus for joining two hollow organ sections with an annular array of surgical staples, the apparatus comprising:
a staple cartridge component including a plurality of surgical staples in the annular array;
an anvil component including an anvil member and a shaft extending therefrom, the anvil member defining a plurality of staple pockets for deforming the plurality of surgical staples, the anvil component movable relative to the staple cartridge component between spaced apart and approximated positions to adjustably clamp tissue between the staple cartridge and anvil components;
a buttress member concentrically aligned with the plurality of staple pockets defined in the anvil member; and
a buttress mount detachably secured with the shaft of the anvil component, the buttress mount including an annular ring member and at least one support member radially extending outward from the annular ring member to secure the buttress member to the anvil member, the at least one support member at least partially underlying the buttress member to provide support thereto, wherein the buttress mount is separate from the buttress member, and the annular ring member of the buttress mount is secured to the shaft of the anvil component.
2. The apparatus according to claim 1, wherein the annular ring member is configured and dimensioned to receive the shaft of the anvil component therethrough.
3. The apparatus according to claim 1, wherein the at least one support member is disposed radially inward of the plurality of staple pockets.
4. The apparatus according to claim 1, wherein a radially outer peripheral portion of the at least one support member is flush with a peripheral edge of the anvil member.
5. The apparatus according to claim 1, wherein the plurality of staple pockets are arranged in annular rows, and the at least one support member extends radially outward of at least one of the annular rows of the plurality of staple pockets.
6. The apparatus according to claim 1, wherein the at least one support member at least partially overlies one of the plurality of staple pockets.
7. The apparatus according to claim 1, wherein the at least one support member has a radially varying thickness.
8. The apparatus according to claim 1, wherein the buttress member has an annular configuration, and wherein the buttress member is disposed in a juxtaposed relation with the plurality of staple pockets.
9. The apparatus according to claim 1, wherein the buttress mount engages a proximal surface of the buttress member.
10. The apparatus according to claim 1, wherein the buttress mount engages a distal surface of the buttress member.
11. The apparatus according to claim 1, wherein the buttress member is made of a biodegradable material.
12. The apparatus according to claim 1, wherein the anvil member defines a recess configured and dimensioned to receive the buttress mount therein.
13. The apparatus according to claim 12, wherein the at least one support member of the buttress mount engages an inner wall of the recess to provide securement of the buttress mount thereagainst.
14. The apparatus according to claim 1, further comprising a knife member concentrically arranged with the plurality of surgical staples in the staple cartridge component, the knife member movable relative to the staple cartridge component.
15. The apparatus according to claim 14, wherein the at least one support member of the buttress mount is disposed radially inward of the knife member when the knife member engages the buttress member.
16. An apparatus for joining two hollow organ sections with an annular array of surgical staples, the apparatus comprising:
a staple cartridge component including a plurality of surgical staples in an annular array;
an anvil component defining a plurality of staple pockets for deforming the plurality of surgical staples, the anvil component movable relative to the staple cartridge component between spaced apart and approximated positions to adjustably clamp tissue between the staple cartridge and anvil components;
a knife member concentrically arranged with the plurality of surgical staples in the staple cartridge component, the knife member movable relative to the staple cartridge component;
a buttress member concentrically aligned with the anvil component; and
a buttress mount detachably secured with the anvil component, the buttress mount including a core ring, an outer ring, and at least one spoke extending between and interconnecting the core ring and the outer ring, the buttress mount at least partially underlying the buttress member to provide support thereto, wherein the buttress mount is separate from the buttress member, and the core ring of the buttress mount is secured to a shaft of the anvil component.
17. The apparatus according to claim 16, wherein the buttress member is concentrically aligned with the plurality of staple pockets.
18. The apparatus according to claim 16, wherein the outer ring at least partially overlaps the plurality of staple pockets in the annular array.
19. The apparatus according to claim 16, wherein the buttress mount engages a proximal surface of the buttress member.
20. The apparatus according to claim 16, wherein the buttress mount engages a distal surface of the buttress member.
21. The apparatus according to claim 16, wherein the outer ring is disposed radially inward of the knife member when the knife member is actuated to engage the buttress member.
22. An apparatus for joining two hollow organ sections with an annular array of surgical staples, the apparatus comprising:
a handle assembly including a firing trigger;
an elongate tubular member extending distally from the handle assembly;
a staple cartridge component coupled to a distal portion of the elongate tubular member, the staple cartridge component including a plurality of surgical staples in the annular array;
an anvil component defining a plurality of staple pockets for deforming the plurality of surgical staples, the anvil component movable relative to the staple cartridge component between spaced apart and approximated positions to clamp tissue between the staple cartridge and anvil components;
a knife member concentrically arranged with the plurality of surgical staples in the staple cartridge component, the knife member movable relative to the staple cartridge component;
a buttress member concentrically aligned with the anvil component; and
a buttress mount detachably secured with the anvil component, the buttress mount including an annular ring member and at least one support member radially extending outward from the annular ring member, the buttress mount at least partially underlying the buttress member to provide support thereto, wherein the buttress member is separate from the buttress mount, and the annular ring member of the buttress mount is secured to a shaft of the anvil component.
23. The apparatus according to claim 22, wherein the at least one support member is disposed radially inward of the plurality of staple pockets.
24. The apparatus according to claim 22, wherein a peripheral portion of the at least one support member is flush with a peripheral edge of the anvil member.
25. The apparatus according to claim 22, wherein the plurality of staple pocket are arranged in annular rows, and the at least one support member extends radially outward of at least one of the annular rows of the plurality of staple pockets.
26. The apparatus according to claim 22, wherein the plurality of staple pockets are arranged in annular rows, and the at least one support member at least partially overlies at least one of the annular rows of the plurality of staple pockets.
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