Anvil assembly for tubular stapler and tubular stapler

Abstract

The present disclosure provides a nail anvil assembly for a tubular stapler and a tubular stapler, wherein the nail anvil assembly comprises an anvil cap, an anvil and a first patch. The anvil has an anvil end face on the side away from the anvil cap; the first patch comprises a first body portion and a first connecting portion, the first body portion covers the anvil end face, and at least a portion of the first connecting portion is clamped between the anvil cap and the anvil. The first patch is clamped between the anvil cap and the anvil, which can effectively prevent the first patch from falling off the tubular stapler, and can also avoid the contamination that may be caused by private patch replacement, so as to ensure the use safety and hygienic safety of the medical device.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and in particular to a stapler anvil assembly for a tubular stapler and the tubular stapler. Background Art

[0002] The application of staplers has greatly promoted the development of modern surgery and minimally invasive surgery, and has a milestone significance. Staplers include linear staplers and tubular staplers, which can staple tissues through staplers while cutting, and are widely used for cutting, suturing or anastomosis of organ tissues such as intestines, stomachs, lungs, and pancreas. The cutting and anastomosis part of the tubular stapler includes two parts, one is a staple anvil assembly with an umbrella-like or mushroom-like shape, and the other is a stapler assembly of the stapler. The stapler assembly includes a stapler and is also provided with an annular knife for cutting tissue. The tubular stapler can form an annular staple line on the tissue, and use the annular knife to cut the tissue to form a circular anastomosis. This instrument can be used to conveniently perform end-to-end, end-to-side, and side-to-side anastomosis of tubular organs, and is usually used for esophageal, intestinal or gastrointestinal surgery. Compared with conventional surgery that first uses a scalpel / scissors to open, it greatly reduces the risk of such surgical procedures and shortens the operation time, so it has a very wide range of applications in surgical operations. However, the rigidity of staples alone cannot completely prevent leakage and bleeding of the anastomotic tissue. This is because the staples are rigid structures that cannot fully match the flexibility of soft tissues, resulting in leakage and bleeding in the staple holes. To solve the above problems, the anastomotic reinforcement patch can be used in conjunction with the stapler, so that while the stapler cuts and seals the wound surface, the reinforcement patch is fixed to the wound surface to seal the staple holes, improve the wound surface strength, and thus prevent leakage and bleeding in the wound surface. Summary of the invention

[0003] The purpose of the present disclosure is to provide a stapler anvil assembly for a tubular stapler and a tubular stapler in order to solve the technical problems in the related art. The specific scheme is as follows:

[0004] According to a first aspect of the embodiments of the present disclosure, there is provided an anvil assembly for a tubular stapler, comprising: an anvil cap; an anvil, wherein the anvil has an anvil end face on a side away from the anvil cap; and a first patch, wherein the first patch comprises a first body portion and a first connecting portion, wherein the first body portion covers the anvil end face, and wherein at least a portion of the first connecting portion is clamped between the anvil cap and the anvil.

[0005] In some embodiments, the first connecting portion is a serrated structure, and at least a portion of the first connecting portion is clamped between the anvil cap and the anvil.

[0006] In some embodiments, the anvil assembly for the tubular stapler further includes: a washer ring, which is arranged on the side of the first main body of the first patch facing the anvil, wherein the outer aperture of the washer ring is larger than the inner aperture of the first patch, so as to prevent the washer ring from escaping from the inner aperture of the first patch.

[0007] In some embodiments, the anvil assembly for the tubular stapler further includes: a central axis assembly, which is clamped with the anvil cap so that the anvil cap has a pressing tendency toward the anvil to clamp the first patch.

[0008] In some embodiments, the anvil cap further includes: a first limiting member, which is arranged on the anvil cap portion and extends toward the anvil, and a first protrusion is arranged on the end of the first limiting member away from the anvil cap; a second limiting member, which is arranged inside the anvil cap and extends toward the anvil, and a second protrusion is arranged on the end of the second limiting member away from the anvil cap.

[0009] In some embodiments, the central axis assembly includes: a buckle assembly, and after the buckle assembly is engaged with the anvil cap, the anvil cap has a pressing tendency toward the anvil.

[0010] In some embodiments, the buckle assembly includes: a buckle base, the buckle base has a first surface facing the nail anvil cap and a second surface away from the nail anvil cap, including: a first mounting portion, arranged on the first surface, the first mounting portion is used to be clamped with the first limiting member; a second mounting portion, arranged on the second surface, the outer side wall of the second mounting portion is provided with a mounting groove, wherein a first through hole is provided at the end of the first mounting portion, the first limiting member extends through the first through hole to the inside of the first mounting portion, and the first protrusion is clamped with the inner wall of the first mounting portion.

[0011] In some embodiments, the anvil assembly for the tubular stapler further includes: a first elastic member, which is sleeved on the end of the first mounting portion so that the end cap tends to move away from the anvil.

[0012] In some embodiments, the snap assembly also includes: a snap-on member, wherein a first protrusion key matching the mounting groove is provided on a side of the snap-on member facing the snap-on base, and a first recessed portion is provided on a side away from the snap-on base; a second elastic member, wherein the second elastic member is provided in the mounting groove, wherein the first recessed portion is used to snap-on with the second protrusion portion.

[0013] According to a second aspect of the embodiments of the present disclosure, a tubular stapler is provided. The tubular stapler includes the anvil assembly for the tubular stapler described in the first aspect of the embodiments of the present disclosure.

[0014] Compared with the related art, the above solution of the embodiment of the present disclosure has at least the following beneficial effects:

[0015] The anvil assembly provided by the present invention is used in a tubular stapler, and the first patch is clamped between the anvil cap and the anvil, which can effectively prevent the first patch from falling off the stapler and avoid the pollution that may be caused by private patch replacement, thereby ensuring the safe use and hygienic safety of the medical device.

[0016] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present disclosure, and together with the specification, are used to explain the principles of the present disclosure. Obviously, the drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0018] Figure 1 It is a schematic structural diagram of an anvil assembly and a central axis assembly of a tubular stapler in an unfired state according to an exemplary embodiment.

[0019] Figure 2 yes Figure 1 A partial enlarged view of part A.

[0020] Figure 3 yes Figure 1 A partial enlarged view of part B.

[0021] Figure 4 The figure is an exploded view of an anvil assembly and a central shaft assembly according to an exemplary embodiment.

[0022] Figure 5 The diagram is a partial exploded view of a nail anvil assembly according to an exemplary embodiment.

[0023] Figure 6 It is a schematic structural diagram of a nail magazine assembly when a ring-shaped knife is in a storage state according to an exemplary embodiment.

[0024] Figure 7 It is a schematic structural diagram of a staple cartridge assembly when a ring-shaped knife is in a released state according to an exemplary embodiment.

[0025] Figure 8 The figure is a schematic structural diagram showing a patch fixing member connected to a second patch according to an exemplary embodiment.

[0026] Fig. 9 is a cross-sectional view showing a patch fixing element connected to a second patch according to an exemplary embodiment.

[0027] Fig.10 It is a schematic structural diagram of an anvil assembly and a central axis assembly of a tubular stapler in a firing state according to an exemplary embodiment.

[0028] Fig.11 yes Fig.10 A partial enlarged view of part C.

[0029] Fig.12 yes Fig.10 A partial enlarged view of part D.

[0030] Fig.13 It is a schematic structural diagram of a tubular stapler according to an exemplary embodiment.

[0031] Fig.14 The present invention is a schematic structural diagram of a nail magazine assembly according to a prior art.

[0032] Reference numerals:

[0033] The anvil assembly 100, the anvil cap 110, the first limiting member 111, the second limiting member 112, the limiting groove 113, the first elastic member 114, the washer ring 115, the second protruding key 116, the anvil 120, and the nail stop groove 121;

[0034] The second through hole 201, the first patch 210, the first body portion 211, the first connecting portion 212, the second patch 220, the second body portion 221, the second connecting portion 222, and the edge portion 223;

[0035] Central shaft assembly 300, central shaft body 310, fastener 311, buckle assembly 320, buckle base 321, second elastic member 322, and clamping member 323;

[0036] The staple cartridge assembly 400, the patch fixing member 410, the fixing member body 411, the first clamping portion 412, the second clamping portion 413, the protrusion 414, the staple cartridge 420, the clamping groove 421, the shaft core 430, and the annular knife 440;

[0037] A firing handle 500, a safety bolt 510, and a tubular stapler 1000;

[0038] Nail cartridge assembly 400'; Nail cartridge 420'. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0040] The terms used in the embodiments of the present disclosure are only for the purpose of describing specific embodiments, and are not intended to limit the present disclosure. The singular forms "a", "said" and "the" used in the embodiments of the present disclosure and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, and other quantifiers are similar.

[0041] It should be understood that although the terms first, second, third, etc. may be used to describe ... in the embodiments of the present disclosure, these ... should not be limited to these terms. These terms are only used to distinguish .... For example, without departing from the scope of the embodiments of the present disclosure, the first ... may also be referred to as the second ..., and similarly, the second ... may also be referred to as the first .... In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship. The singular forms "a", "the" and "the" are also intended to include the plural forms, unless the context clearly indicates other meanings.

[0043] It should be further understood that the terms "center", "longitudinal", "lateral", "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] As used herein, the words "if" and "if" may be interpreted as "at the time of" or "when" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrases "if it is determined" or "if (stated condition or event) is detected" may be interpreted as "when it is determined" or "in response to determining" or "when detecting (stated condition or event)" or "in response to detecting (stated condition or event)", depending on the context.

[0046] It should also be noted that the term "includes", "comprising" or any other variation thereof is intended to cover non-exclusive inclusion, so that a commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprising a ..." do not exclude the existence of other identical elements in the commodity or device including the elements.

[0047] In the related art, the patch is detachably mounted on the nail anvil and the nail magazine, and the anastomotic reinforcement patch mounted on the nail anvil adopts a naturally fitting structure without additional fixation. The present invention further transforms the nail anvil, adds a physical fixing structure, further improves the connection strength between the patch and the nail anvil, and improves the safety of use.

[0048] In view of this, optional embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

[0049] The first aspect of the embodiment of the present disclosure provides an anvil assembly 100 for a tubular stapler 1000. The anvil assembly 100 includes an anvil cap 110, an anvil 120 and a first patch 210.

[0050] like Figure 1 , Figure 2 , Figure 3 As shown, the anvil cap 110 is engaged with the anvil 120 , so that a portion of the first patch 210 is clamped between the anvil cap 110 and the anvil 120 and fixed, wherein the anvil 120 has an anvil end surface on a side away from the anvil cap 110 .

[0051] In some embodiments, the first patch 210 is an annular structure, including: a first main body portion 211 and a first connecting portion 212, the first main body portion 211 covers at least a portion of the anvil end surface, the first connecting portion 212 is a serrated structure, and at least a portion of the first connecting portion 212 is clamped between the anvil cap 110 and the anvil 120.

[0052] Specifically, because the side wall of the anvil 120 is tapered, the straight-tube outer patch used in the related art cannot completely wrap the anvil 120. Therefore, in the present disclosure, the first connecting portion 212 is constructed as a sawtooth structure, which has a soft outer periphery and has the advantages of high tension, good relaxation, and strong expandability, and can wrap the anvil 120 to avoid the first patch 210 being displaced on the anvil 120 due to poor matching between the first patch 210 and the anvil 120 or a large press-fit gap, thereby affecting the suturing effect.

[0053] In some embodiments, the anvil assembly 100 further includes: a central axis assembly 300 , which penetrates the anvil 120 and is then engaged with the anvil cap 110 , so that the anvil cap 110 has a pressing tendency toward the anvil 120 to clamp the first patch 210 .

[0054] Furthermore, if Figure 2 As shown, the anvil cap 110 is provided with a first limiting member 111, a second limiting member 112 and a limiting groove 113, wherein the first limiting member 111 is provided inside the limiting groove 113, and a first protrusion is provided at one end of the first limiting member 111 away from the anvil cap 110. A second protrusion is provided at one end of the second limiting member 112 away from the anvil cap 110.

[0055] The anvil cap 110 is further provided with a first elastic member 114, which is disposed inside the limiting groove 113 and sleeved with the end of the central shaft assembly 300, wherein the end of the central shaft assembly 300 is disposed in the limiting groove 113, and the first elastic member 114 abuts against the inner wall of the anvil cap 110. The first elastic member 114 has a tendency to keep the anvil cap 110 away from the central shaft body 310.

[0056] In some embodiments, Figure 4 As shown, the central shaft assembly 300 includes: a central shaft body 310 and a buckle assembly 320. The buckle assembly 320 is disposed between the anvil cap 110 and the anvil 120, and is used to make the anvil cap 110 and the anvil 120 snap together; the central shaft body 310 is connected to the buckle assembly 320, and is used to connect the anvil assembly 100 with an external force-applying component.

[0057] Specifically, the buckle assembly 320 includes a buckle base 321 , and the buckle base has a first surface facing the anvil cap 110 and a second surface facing away from the anvil cap 110 .

[0058] A first mounting portion is provided on the first surface of the buckle base 321, and the first elastic member 114 is sleeved on the outside of the first mounting portion. A first through hole is provided at the end of the first mounting portion, and the first stopper 111 extends through the first through hole to the inside of the first mounting portion, and the first protrusion of the first stopper 111 is engaged with the inner wall of the first mounting portion.

[0059] A second mounting portion is disposed on the second surface of the buckle base 321 , and the second mounting portion is connected to one end of the central axis body 310 , and is used to connect the anvil assembly 100 to an external force-applying component.

[0060] Fasteners 311 are also provided on both sides of the central shaft body 310. The fasteners 311 are clamped with the central shaft body 310 to enable the anvil 120 to move smoothly along the central shaft body 310 to a clamping position with the anvil cap 110, so as to prevent the anvil 120 from falling out of the anvil cap 110 after the anvil cap 110 is clamped with the anvil 120.

[0061] like Figure 1 , Figure 2 , Figure 3 As shown, the buckle assembly 320 further includes a second elastic member 322 and a clamping member 323 .

[0062] A first protrusion key matching the mounting groove is provided on a side of the clip 323 facing the clip base 321, and is used to connect with the clip base 321; a first recessed portion and a first inclined surface are provided on a side of the clip 323 away from the clip base 321, wherein when the first inclined surface is acted upon by external force, it can move in the extension and contraction direction of the second elastic member 322 to squeeze the second elastic member 322.

[0063] The first recessed portion of the clamping member 323 is used to clamp with the second protruding portion of the second limiting member 112 , so that the anvil cap 110 is clamped with the anvil 120 .

[0064] Furthermore, the anvil cap 110 is provided with a second protruding key 116, and the anvil cap 110 has a pressing tendency toward the anvil 120, so that the second protruding key 116 clamps the first patch 210. The first patch 210 moves synchronously with the anvil assembly 100.

[0065] In some embodiments, the staple cartridge assembly 400 includes a staple cartridge 420. Figure 6 As shown, a patch fixing member 410 is disposed inside the staple cartridge 420 for connecting a portion of the fixing patch to the staple cartridge 420 , wherein the staple cartridge 420 is used for storing staples.

[0066] Furthermore, the nail anvil assembly 100 further includes a washer ring 115, such as Figure 3 As shown, the washer ring 115 is disposed on the side of the first patch 210 facing the anvil 120, and the washer ring 115 is used to assist external force in cutting the first patch 210 and the second patch 220, so that the first patch 210 and the second patch 220 are neatly cut on the washer ring 115. The washer ring 115 is constructed as an annular structure, and the outer aperture of the washer ring 115 is larger than the inner aperture of the first patch 210, so as to prevent the washer ring 115 from escaping from the inner aperture of the first patch 210.

[0067] In some embodiments, the second patch 220 includes a second body portion 221 and a second connection portion 222, wherein the second body portion 221 covers the end surface of the staple cartridge 420, and the second connection portion 222 is connected to the patch fixing member 410, and is used to firmly connect the second patch 220 to the staple cartridge 420. The second connection portion 222 is provided in plurality, and the plurality of second connection portions 222 are discretely provided at the inner ring edge of the second body portion 221, and extend in a direction substantially perpendicular to the second body portion 221.

[0068] In some embodiments, the second patch 220 further includes an edge portion 223. The edge portion 223 is disposed at the outer edge of the second body portion 221 and extends in the same direction as the second connecting portion 222 to wrap the outer edge of the staple cartridge 420 to prevent the edge of the staple cartridge 420 from directly contacting human tissue in actual applications.

[0069] In some embodiments, the patch fixing member 410 includes: a fixing member body 411, a first clamping portion 412 and a second clamping portion 413.

[0070] The first clamping portion 412 is provided with a plurality of Figure 8 As shown, a plurality of first clamping portions 412 extend along the fixing body 411 in a direction away from the second patch 220 for connecting the nail magazine 420. A clamping groove 421 is provided inside the nail magazine 420, and the clamping groove 421 is connected to the first clamping portion 412 of the patch fixing member 410.

[0071] A plurality of second clamping portions 413 are provided, and the plurality of second clamping portions 413 extend along the fixing element body 411 toward a direction approaching the second patch 220 , and are used for connecting the second patch 220 .

[0072] Specifically, the second clamping portion 413 is provided with a protrusion 414, and the second connecting portion 222 of the second patch 220 is provided with a second through hole 201. Fig. 9 As shown, after the second through hole 201 passes through the protrusion 414 , the second connecting portion 222 is connected to the second clamping portion 413 , that is, the second patch 220 is connected to the patch fixing member 410 .

[0073] In some embodiments, the anvil assembly 100 may be connected to the nail magazine assembly 400. Specifically, the anvil assembly 100 and the nail magazine assembly 400 have a first state and a second state.

[0074] When the anvil assembly 100 and the nail magazine assembly 400 are in the first state, the anvil 120 is separated from the nail magazine 420, the first patch 210 is separated from the second patch 220, and the first patch 210 and the second patch 220 are respectively assembled to the anvil 120 and the nail magazine 420.

[0075] When the anvil assembly 100 and the staple cartridge assembly 400 are in the second state, the anvil 120 fits with the staple cartridge 420 , the first patch 210 fits with the second patch 220 , and the staples in the staple cartridge 420 connect the first patch 210 with the second patch 220 .

[0076] In some embodiments, the nail magazine assembly 400 also includes an axis core 430, and the inner wall of the axis core 430 is provided with a third connection portion suitable for connecting to the central axis body 310. When the anvil assembly 100 and the nail magazine assembly 400 are switched from the first state to the second state, the central axis body 310 is connected to the third connection portion.

[0077] Specifically, when the anvil assembly 100 and the nail magazine assembly 400 are in the second state, the end of the central axis body 310 away from the anvil cap 110 extends toward the inside of the nail magazine 420 and connects with the third connecting portion in the shaft core 430 , thereby making the anvil 120 fit with the nail magazine 420 .

[0078] In some embodiments, the staple cartridge assembly 400 further includes an annular knife 440 . The annular knife 440 is sleeved on the outside of the positioning shaft core 430 and moves in the length direction of the shaft core 430 .

[0079] The annular knife 440 has a storage position and a release position relative to the staple cartridge assembly 400 .

[0080] When the anvil assembly 100 and the nail magazine assembly 400 are in the first state, the annular knife 440 is stored in the nail magazine 420. Figure 6As shown, the annular knife 440 is in the storage position at this time; when the anvil assembly 100 and the staple cartridge assembly 400 are in the second state, the tubular stapler 1000 can be fired to switch the annular knife 440 from the storage position to the release position.

[0081] like Figure 7 As shown, the end of the annular knife 440 in the firing state extends out of the nail magazine assembly 400 to cut off the first patch 210 and the second patch 220 .

[0082] In some embodiments, a nail anvil groove 121 is provided on the end surface of the nail anvil 120, and the nail anvil groove 121 is used to squeeze and deform the suture nail. Further, the first patch 210 and the second patch 220 are sutured. The first patch 210 and the second patch 220 sutured by the suture nails are connected to the human tissue, and the cut part of the first patch 210 and the second patch 220 and the human tissue are cut off by the annular knife 440.

[0083] In some embodiments, when the tubular stapler 1000 is restored from the firing state to the initial state, the annular knife 440 switches from the release position to the storage position. At this time, the first patch 210, the second patch 220, and the human tissue sutured by the first patch 210 and the second patch 220 are cut off by the annular knife 440.

[0084] In some embodiments, the anvil cap 110 and the anvil 120 have a clamping state for clamping the first patch 210 , and a releasing state for releasing the first patch 210 .

[0085] like Fig.10 , Fig.11 , Fig.12 As shown, after the annular knife 440 cuts off the first patch 210 and the second patch 220, the annular knife 440 continues to move toward the anvil cap 110, and the annular knife 440 cuts off the washer ring 115 and contacts and presses the first inclined surface of the clamping member 323, so that the clamping member 323 squeezes the second elastic member 322. The second elastic member 322 is compressed, and the clamping member 323 moves toward the buckle base until the first concave portion of the clamping member 323 is disengaged from the clamping of the second convex portion of the second limiting member 112, and further, the anvil cap 110 is separated from the anvil 120 and the first patch 210 is released. At this time, the first patch 210 is removed from between the anvil cap 110 and the anvil 120.

[0086] A second aspect of the present disclosure provides a tubular stapler 1000 , which includes the anvil assembly 100 in the first aspect of the present disclosure.

[0087] In some embodiments, the tubular stapler 1000 further includes a firing handle 500 and a safety bolt 510. Fig.13 As shown, when the nail anvil assembly 100 and the nail magazine assembly 400 are in the second state, the tubular stapler 1000 can be fired. Before firing the tubular stapler 1000, the safety bolt 510 needs to be peeled off the firing handle 500. Furthermore, the firing handle 500 is pressed with all the force to move the nail magazine 420 as a whole toward the front end of the tubular stapler 1000, and at the same time, the staples and the annular knife 440 are pushed out. The staples are sent out from the nail magazine 420, and deformed by contacting with the nail groove 121 at the end of the nail anvil 120, so that the first patch 210 and the second patch 220 are partially connected and fixed; the annular knife 440 is sent out from the nail magazine 420 to cut off the first patch 210 and the second patch 220.

[0088] Furthermore, the annular knife 440 continues to move toward the anvil cap 110 , cuts off the washer ring 115 , and causes the anvil cap 110 to pop open, releasing the first patch 210 .

[0089] In other embodiments, after the anvil cap 110 and the anvil 120 are ejected, the anvil cap 110 can be contracted as the central shaft body 310 passes through the anvil 120 . Furthermore, the anvil assembly 100 is moved out of the human body as the central shaft assembly 300 moves.

[0090] The anvil assembly 120 for a tubular stapler 1000 provided by the present disclosure and the tubular stapler 1000 are disposable devices. The anvil assembly 100 has the anvil 120, the anvil cap 110 for clamping and the patch fixing member 410 for connection, so that the first patch 210 and the second patch 220 can be connected to the anvil 120 and the stapler 420 respectively, effectively preventing the first patch 210 and the second patch 220 from being dislodged from the stapler. When the first patch 210 is dislodged from between the anvil cap 110 and the anvil 120, it cannot be installed back into the tubular stapler 1000 again, which can avoid the pollution caused by private patch replacement, so as to ensure the use safety and hygienic safety of medical devices.

[0091] The biomaterial used for the fixation patch described in the present application is selected from a degradable polymer material or a degradable animal-derived biomaterial. Preferably, the degradable animal-derived biomaterial includes a dermal matrix, pericardium, peritoneum, bladder submucosa or small intestinal submucosa treated with immunogen removal, or a combination of these materials, such as a composition obtained by lamination, weaving, inlaying, etc. Preferably, it includes a decellularized small intestinal submucosa matrix material. The degradable polymer material can be selected from PGA, PLA or PLGA, or a combination of these materials, such as a composition obtained by lamination, weaving, inlaying, etc.

[0092] The specific structure, working principle, and beneficial effects of the anvil assembly 120 for the tubular stapler 1000 and the tubular stapler 1000 provided in the embodiments of the present disclosure can refer to the anvil assembly 120 for the tubular stapler 1000 and the tubular stapler 1000 described in any of the above embodiments, and will not be repeated here.

[0093] Although the present disclosure describes the anvil assembly 100 with the first patch 210 and the staple cartridge assembly 400 with the second patch 220, and uses them together, in fact, the anvil assembly 100 in the present disclosure can be used together with the staple cartridge assembly 400 without the second patch 220, and can also be used together with a staple cartridge assembly with patches in other forms. That is, the anvil assembly 100 in the present disclosure is versatile and can be used as a component of various types of tubular staplers.

[0094] like Fig.14 As shown, Fig.14 1 is a schematic diagram of a structure of a nail magazine assembly according to a prior art. In practical applications, the nail anvil assembly 100 provided by the present disclosure can be used in conjunction with a nail magazine assembly without a patch, for example Fig.14 The staple cartridge assembly 400' shown in the figure is not provided with a patch on the staple cartridge end surface. The anvil assembly 100 can also be used in conjunction with a staple cartridge assembly with other forms of patches, such as a staple cartridge assembly 400' equipped with an adaptable patch.

[0095] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other. For the system or device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description.

[0096] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A stapler anvil assembly for a tubular stapler, characterized in that: include: Anvil cap; an anvil, wherein the side of the anvil away from the anvil cap has an anvil end surface; and a first patch, the first patch comprising a first body portion and a first connecting portion, the first body portion covers the end surface of the anvil, and at least a portion of the first connecting portion is clamped between the anvil cap and the anvil, The anvil cap and the anvil have a clamping state for clamping the first patch and a releasing state for releasing the first patch.

2. The stapler anvil assembly for a tubular stapler according to claim 1, characterized in that: The first connecting portion is a sawtooth structure, and at least a portion of the first connecting portion is clamped between the anvil cap and the anvil.

3. The stapler anvil assembly for a tubular stapler according to claim 1, characterized in that: Also includes: A washer ring is arranged on a side of the first body portion of the first patch facing the anvil, The washer ring is constructed as an annular structure, and the outer aperture of the washer ring is larger than the inner aperture of the first patch, so as to prevent the washer ring from escaping from the inner aperture of the first patch.

4. The stapler anvil assembly for a tubular stapler according to claim 1, characterized in that: Also includes: The central shaft assembly passes through the anvil and is clamped with the anvil cap. The central shaft assembly includes a buckle assembly. After the buckle assembly is clamped with the anvil cap, the anvil cap has a pressing tendency toward the anvil to clamp the first patch.

5. The stapler anvil assembly for a tubular stapler according to claim 4, characterized in that: The nail anvil cap also includes: A first stopper, which is arranged on the anvil cap and extends toward the anvil, and a first protrusion is arranged at one end of the first stopper away from the anvil cap; The second limiting member is arranged inside the anvil cap and extends toward the anvil. A second protrusion is arranged at one end of the second limiting member away from the anvil cap.

6. The stapler anvil assembly for a tubular stapler according to claim 5, characterized in that: The buckle assembly comprises: A snap-on base, the snap-on base having a first surface facing the anvil cap and a second surface facing away from the anvil cap, comprising: A first mounting portion, disposed on the first surface, the first mounting portion being used for engaging with the first limiting member; A second mounting portion is disposed on the second surface, and an outer side wall of the second mounting portion is provided with a mounting groove. A first through hole is disposed at the end of the first mounting portion, the first position-limiting member passes through the first through hole and extends to the inside of the first mounting portion, and the first protrusion is engaged with the inner wall of the first mounting portion.

7. The stapler anvil assembly for a tubular stapler according to claim 6, characterized in that: Also includes: The first elastic member is sleeved on the end of the first mounting portion so that the anvil cap tends to move away from the anvil.

8. The stapler anvil assembly for a tubular stapler according to claim 6, characterized in that: The buckle assembly also includes: A clamping member, wherein a first protruding key matching the mounting groove is provided on a side of the clamping member facing the clamping base, and a first recessed portion is provided on a side away from the clamping base; a second elastic member, the second elastic member being disposed in the mounting groove, In response to the first recessed portion and the second raised portion being engaged, the anvil cap and the anvil are in the clamped state; in response to the first recessed portion and the second raised portion being disengaged, the anvil cap and the anvil are in the released state.

9. A tubular stapler, characterized in that: include: The stapler anvil assembly for a tubular stapler according to any one of claims 1 to 8.

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