Firing member, staple cartridge assembly, and surgical stapler

Abstract

Provided in the present application are a firing member, a staple cartridge assembly, and a surgical stapler. The firing member is used for the staple cartridge assembly of the surgical stapler and can be driven to move in the axial direction of the surgical stapler. The staple cartridge assembly is provided with at least one row of staples arranged in the axial direction. The firing member comprises a body portion and at least one staple pushing portion. The staple pushing portion is at least partially located on a distal side of the body portion. An upper surface of the staple pushing portion is provided with a staple pushing surface, and the staple pushing surface is provided with at least one limiting portion. Each staple pushing portion corresponds to one row of the staples, and when the firing member moves in a distal direction to drive the staples, the limiting portion at least partially acts on the staples. According to the present application, by arranging the limiting portion on the distal side of the firing member, the staples in the forming process are guided and limited, and the transverse offset of the staples under the action of an external force is compensated, thereby effectively improving the surgical effect.

Description

Firing member, staple cartridge assembly, and surgical stapler TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a firing member, a staple cartridge assembly, and a surgical stapler. BACKGROUND

[0002] In the prior art, a medical stapler generally comprises a device platform, a firing handle movably connected to the device platform, and a staple head mounted on the device platform. The staple head can pass through a small incision on the body through a puncture device to access the surgical site to perform surgery. The staple head comprises a staple cartridge assembly and an anvil oppositely arranged. The staple cartridge assembly comprises a staple belt, a support member supporting the staple belt, and a staple cartridge cover accommodating the staple belt and the support member, and a firing member is arranged at the proximal end side of the staple cartridge cover. When the stapler is fired, the cutting knife is pushed to move to the distal end side by the push knife rod, the cutting knife drives the firing member to move to the distal end side of the stapler, the firing member pushes the anastomosis staples rotatably connected to the staple belt body outward, and the cutting knife cuts the tissue between the staple cartridge assembly and the anvil, thereby achieving the firing of the stapler.

[0003] In the existing stapler, when the firing member pushes the anastomosis staples outward, the staple legs of the anastomosis staples pierce the tissue and are resisted by the tissue. Due to the existence of a certain gap on the transverse sides of the anastomosis staples, the anastomosis staples may be deviated to the left and right sides under the action of external force, which affects the staple forming effect and leads to poor suturing effect on the tissue, thereby seriously affecting the surgical effect. SUMMARY

[0004] In view of the problems in the prior art, the purpose of the present application is to provide a firing member, a staple cartridge assembly, and a surgical stapler. A limiting portion is arranged at the distal end side of the firing member to guide and limit the anastomosis staples during the forming process, compensate for the transverse deviation of the anastomosis staples under the action of external force, and improve the surgical effect.

[0005] The present application provides a firing member for a staple cartridge assembly of a surgical stapler and can be driven to move in the axial direction of the surgical stapler. The staple cartridge assembly is provided with at least one row of anastomosis staples arranged in the axial direction. The firing member comprises a body portion and at least one staple pushing portion, the staple pushing portion is at least partially located at the distal end side of the body portion, the upper surface of the staple pushing portion is provided with a staple pushing surface, and at least one segment of the staple pushing surface is provided with a limiting portion.

[0006] Each of the staple pushing portions corresponds to a row of the anastomosis staples, and when the firing member moves to the distal end direction to drive the anastomosis staples, the limiting portion at least partially acts on the anastomosis staples, so that the limiting portion compensates for the transverse deviation of the anastomosis staples.

[0007] In some embodiments, the limiting portion is a limiting groove arranged in the length direction of the staple pushing surface.

[0008] In some embodiments, the anastomosis staple includes a staple body, the limiting groove has a first projection in a first plane perpendicular to the axial direction, the staple body has a second projection in the first plane, and two sides of the first projection are located outside two sides of the second projection, respectively.

[0009] In some embodiments, the limiting groove includes a first side wall and a second side wall extending along the length direction of the push surface, respectively, and the first side wall and the second side wall are symmetrically arranged with respect to the center line of the limiting groove.

[0010] In some embodiments, the limiting portion includes a first end and a second end, the second end is located on the proximal side of the first end, and from the first end to the second end of the limiting portion, the limiting portion extends along the length direction of the push surface, and the profile trend of the limiting portion is adapted to the trend of the push surface; the first end and the second end are smoothly connected with the push surface.

[0011] In some embodiments, the limiting groove is a circular arc shape as a whole to adapt to the shape of the push surface.

[0012] In some embodiments, the body portion includes a first body portion and a second body portion, the push portion is fixedly connected with the first body portion, and the first body portion is installed on the distal side of the second body portion.

[0013] In some embodiments, the push portion includes a first push portion and a first push portion, the body portion includes a first body portion and a second body portion, the first push portion and the first body portion are fixedly connected, the second push portion and the second body portion are fixedly connected, the first body portion is installed on the distal side of the second body portion, and the first push portion is located on the inner side of the second push portion.

[0014] In some embodiments, a plurality of limiting portions are arranged at intervals, and the plurality of limiting portions are arranged along the length direction of the push surface.

[0015] In some embodiments, the limiting portion is a protruding portion, and the surface of each limiting portion is provided with a limiting groove.

[0016] In some embodiments, the limiting portion includes a limiting protruding portion arranged along the length direction of the push surface, and when the firing member moves to abut against the push portion and the anastomosis staple, the limiting protruding portion is at least partially located on the outer side of the corresponding anastomosis staple and / or the inner side of the anastomosis staple to compensate for the lateral deviation of the anastomosis staple to the outer side and / or the inner side.

[0017] The second aspect of the present application also provides a staple cartridge assembly including the firing member.

[0018] The third aspect of the present application also provides a surgical anastomat comprising the staple cartridge assembly.

[0019] The firing member, the staple cartridge assembly and the surgical anastomat provided by the present application have the following advantages:

[0020] In the present application, the limiting portion is arranged on the distal end side of the firing member, and when the firing member moves in the distal direction to drive the anastomat staples, the limiting portion at least partially acts on the anastomat staples, so that the limiting portion at least partially abuts against the anastomat staples during the rotation of the anastomat staples driven by the pushing portion, and guides and limits the anastomat staples during the forming process, compensates for the lateral deviation of the anastomat staples under external force, improves the suturing effect of the anastomat staples, and effectively improves the surgical effect. BRIEF DESCRIPTION OF DRAWINGS

[0021] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments with reference to the attached drawings.

[0022] Fig. 1 is a structural schematic view of a staple cartridge assembly according to an embodiment of the present application;

[0023] Fig. 2 is a perspective view of a firing member and a staple belt according to the embodiment of the present application;

[0024] Fig. 3 is a front view of the firing member and the staple belt according to the embodiment of the present application;

[0025] Fig. 4 is a sectional view in the direction of C1-C1 in Fig. 3;

[0026] Fig. 5 is a left view of the firing member according to the embodiment of the present application;

[0027] Fig. 6 is a schematic view of Fig. 5 enlarged at A and rotated counterclockwise;

[0028] Fig. 7 is a perspective view of a firing member according to an embodiment of the present application;

[0029] Fig. 8 is an exploded view of the firing member according to the embodiment of the present application;

[0030] Fig. 9 is a perspective view of a firing member according to an embodiment of the present application;

[0031] Fig. 10 is an exploded view of the firing member according to the embodiment of the present application;

[0032] Fig. 11 is a left view of the firing member according to the embodiment of the present application;

[0033] Fig. 12 is a schematic view of Fig. 11 enlarged at B and rotated counterclockwise;

[0034] Fig. 13 is a perspective view of a firing member according to an embodiment of the present application;

[0035] FIG. 14 is an exploded view of a firing member of Example 4 of the present application;

[0036] FIG. 15 is a perspective view of a firing member of Example 5 of the present application;

[0037] FIG. 16 is a front view of the firing member of Example 5 of the present application;

[0038] FIG. 17 is a top view of the firing member of Example 5 of the present application;

[0039] FIG. 18 is a partial schematic view of a firing member of Example 6 of the present application;

[0040] FIG. 19 is a partial schematic view of a firing member of Example 7 of the present application;

[0041] FIG. 20 is a partial schematic view of a firing member of Example 8 of the present application;

[0042] FIG. 21 is a partial schematic view of a firing member of Example 9 of the present application;

[0043] FIG. 22 is a partial schematic view of a firing member of Example 10 of the present application;

[0044] FIG. 23 is a schematic view of a firing member of Example 11 of the present application;

[0045] FIG. 24 is a schematic view of a firing member of Example 12 of the present application.

[0046] Reference numeral: 1 firing member (embodiment 1) 332 third body portion 11 pusher portion 334 fourth assembly portion 110 pusher surface 4 firing member (embodiment 5) 111 limiting groove 41 pusher portion 1111 first side wall 410 pusher surface 1112 second side wall 411 limiting portion 111a first side edge 412 limiting groove 111b second side edge 42 body portion 12 body portion 43 cutting portion 13 cutting portion 5a-5c firing member (embodiments 6-8) 2 firing member (embodiment 2) 51a-51c pusher portion 21 first member 511a-511c limiting groove 211 first pusher portion 6 firing member (embodiments 9, 10) 2111 first limiting groove 61 pusher portion 212 first body portion 610 pusher surface 2121 first assembly portion 62 limiting protrusion 22 second member 621 guide surface 221 second pusher portion 7 firing member (embodiments 11, 12) 2211 second limiting groove 71 pusher portion 222 second body portion 710 pusher surface 2221 second assembly portion 711 first position limiting groove 223 cutting portion 712 second position limiting groove 3 firing member (embodiments 3, 4) 713 third position limiting groove 31 first member 72 body portion 311 pusher portion 73 cutting portion 3111 limiting groove 100 nail cartridge cover 312 first body portion101 nail hole 313 first fitting portion 200 band 32 second member 201 band body 321 second nail pushing portion 203 staple 3211 second limiting groove 2031 nail connecting portion 322 second body portion 2032 staple body 323 second fitting portion 2033 staple leg 324 third fitting portion 300 support 33 third member P first plane 331 staple cutting portion DETAILED DESCRIPTION

[0047] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example implementations to those skilled in the art. The term "or" as used in this specification is intended to mean "and / or" unless otherwise indicated. Although the terms "upper," "lower," "between," and the like can be used in this specification to describe different example features and elements of the application, these terms are used in this context solely for convenience, e.g., based on the example's orientation in the drawings. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures as falling within the scope of the application. Although the terms "first" or "second" can be used herein to describe certain features, these terms are used only for convenience and do not limit the scope of these features.

[0048] The application provides a firing member, a staple cartridge assembly and a surgical stapler. The surgical stapler comprises a device platform, a firing handle movably connected to the device platform and a staple head mounted on the device platform. The staple head comprises a staple cartridge assembly and an anvil oppositely arranged. The staple cartridge assembly comprises a firing member and at least one row of anastomosis staples arranged along the axial direction. The firing member can be driven to move along the axial direction of the surgical stapler. The firing member comprises a body portion and at least one pusher portion, the pusher portion is at least partially located on the distal side of the body portion, the upper surface of the pusher portion is provided with a pusher surface, and the pusher surface is provided with at least one limiting portion. Each pusher portion corresponds to a row of anastomosis staples, and when the firing member moves in the distal direction to drive the anastomosis staples, the limiting portion at least partially acts on the anastomosis staples to limit and guide the anastomosis staples during the forming process, compensate for the lateral deviation of the anastomosis staples, improve the stapling effect of the anastomosis staples, and effectively improve the surgical effect. In the application, the limiting portion compensating for the lateral deviation of the anastomosis staples can only compensate for the deviation of the anastomosis staples to one side (for example, left or right), or the limiting portion can compensate for the deviation of the anastomosis staples to both sides.

[0049] The specific structure of the firing member and the staple cartridge assembly comprising the same will be described below in combination with specific embodiments. It can be understood that the drawings and the following description are only examples and do not limit the scope of protection of the application. The same reference signs in the drawings represent the same or similar structures, and thus repeated description thereof will be omitted. In the application, the distal end and the proximal end are relative to the operator, the end closer to the operator is the proximal end, the end farther away from the operator, i.e., the end closer to the surgical position is the distal end, and the direction along the axis of the stapler is the axial direction, i.e., the direction from the distal end to the proximal end of the stapler or the direction from the proximal end to the distal end of the stapler. As shown in FIGS. 1 and 2, the S1 direction is the direction from the proximal end to the distal end of the stapler, and the S1 direction or the direction opposite to the S1 direction is defined as the axial direction of the stapler. The S2 direction in FIG. 1 is defined as the longitudinal direction of the stapler, i.e., the height direction. The S3 direction in FIG. 2 is defined as the transverse direction of the stapler, i.e., the width direction. In the application, for a component, the inner side and the outer side are relative to the center line of the component, the side close to the center line is the inner side, and the side away from the center line is the outer side.

[0050] Figs. 1-6 show the structure of the firing member 1 and the staple cartridge assembly of the embodiment 1. As shown in Figs. 1-3, the staple cartridge assembly comprises the firing member 1, a staple strip 200, a support member 300 supporting the staple strip 200, and a staple cartridge cover 100 containing the staple strip 200 and the support member 300. The staple strip 200 comprises a staple strip body 201 and staples 203. The staple 203 comprises a staple leg 2033, a staple connecting portion 2031, and a staple body 2032. The staple 203 is rotatably and detachably connected to the staple strip body 201 through the staple connecting portion 2031. The upper surface of the staple cartridge cover 100 is provided with staple holes 101. The lateral sides of the staple 203 are limited between the staple cartridge cover 100 and the support member 300. In order to ensure that the staple 203 can rotate smoothly and be pushed out when being driven, a certain lateral gap is respectively provided between the side wall of the staple 203 and the side wall of the staple cartridge cover 100 and the side wall of the support member 300. In the initial state, the firing member 1 is located at the proximal end of the staple cartridge cover 100 without acting on the staple 203.

[0051] As shown in Figs. 2 and 3, the firing member 1 comprises a body portion 12 and at least one staple pushing portion 11, which is at least partially located at the distal end side of the body portion 12. The top of the body portion 12 is provided with a staple cutting portion 13. The upper surface of each staple pushing portion 11 is provided with a staple pushing surface 110, which is provided with a limiting portion. In this embodiment, the limiting portion is a limiting groove 111 arranged along the length direction of the staple pushing surface 110. At least one row of staples 203 is arranged in the staple cartridge assembly, and the number of the staple pushing portions 11 corresponds to the number of the rows of staples 203, i.e., each staple pushing portion 11 corresponds to one row of staples 203 and is used to push out the corresponding row of staples 203 when the stapler is fired. Two staple pushing portions 11 are exemplarily shown in Fig. 2, and correspondingly, two rows of staples 203 are arranged in the staple cartridge assembly, but the present application is not limited thereto, and the number of the rows of staples 203 can also be one, three, four, etc. The staple pushing surface corresponding to the row of staples can also be provided with the limiting portion on each staple pushing surface, or any one of them can be provided with the limiting portion, which is not limited in the present application. A first plane P perpendicular to the axial direction is exemplarily shown in Fig. 3, i.e., a plane parallel to the lateral direction and the longitudinal direction. The projection of the limiting groove 111 in the first plane P at least partially overlaps with the projection of the staple 203 in the first plane P, so that the staple 203 is at least partially located on the path of the limiting groove 111 moving from the proximal end to the distal end.

[0052] In the initial state, the firing member 1 is located at the proximal end side of the cartridge cover 100 without acting on the anastomosis needle 203. When the anastomat is fired, the firing member 1 is driven to move in the distal direction, the needle pushing portion 11 of the firing member 1 first contacts the anastomosis needle 203 and drives the anastomosis needle 203 to rotate, the needle leg 2033 of the anastomosis needle 203 penetrates out of the needle hole 101 to pierce the tissue, and in the process of rotating the anastomosis needle 203, the anastomosis needle 203 is at least partially located inside the limiting groove 111, the side wall of the limiting groove 111 abuts against the anastomosis needle 203, and if the anastomosis needle 203 has a tendency to laterally deviate to one side under the resistance of the tissue, the lateral deviation of the anastomosis needle 203 can be compensated under the action of the side wall of the limiting groove 111. Because the limiting groove 111 guides and limits the anastomosis needle 203 in the process of closing and forming the anastomosis needle, the lateral deviation of the anastomosis needle 203 is effectively compensated. After the anastomosis needle 203 is closed and formed, the needle cutting portion 13 moves to the needle connecting portion 2031 and applies a force to the needle connecting portion 2031 to separate the needle connecting portion 2031 and the needle belt body 201, so that the anastomosis needle 203 is separated from the needle belt body 201 and is sutured on the tissue. Therefore, the limiting groove 111 avoids the lateral deviation of the anastomosis needle 203 under the resistance of the tissue, improves the suturing effect of the anastomosis needle 203, and effectively improves the operation effect.

[0053] Fig. 4 is a sectional view in the direction of C1-C1 in Fig. 3, and the sectional plane obtained is a plane perpendicular to the axial direction, i.e. parallel to the first plane. In the sectional view of Fig. 4, the sectional profile of the needle body 2032 corresponds to the profile of the second projection M2 of the needle body 2032 in the first plane, and the sectional profile of the limiting groove 111 corresponds to the profile of the first projection M1 of the limiting groove 111 in the first plane. In this embodiment, the width of the second projection M2 is smaller than the width of the first projection M1, and the first side edge 111a of the first projection M1 is located outward of the right side edge of the second projection M2, and the second side edge 111b of the first projection M1 is located outward of the left side edge of the second projection M2 (where outward means the side away from the center line S4 of the first projection, and left and right are relative to the center line S4 in the perspective of Fig. 4). Thus, in the process of driving the anastomosis needle 203 to rotate by the needle pushing portion 11, the part of the needle body 2032 of the anastomosis needle 203 abutting against the limiting groove 111 enters the inside of the limiting groove 111 as a whole. If the anastomosis needle 203 has a tendency to deviate to the left under the resistance of the tissue, the left side wall of the limiting groove 111 limits the anastomosis needle 203 to compensate for the deviation of the anastomosis needle 203 to the left, and if the anastomosis needle 203 has a tendency to deviate to the right under the resistance of the tissue, the right side wall of the limiting groove 111 limits the anastomosis needle 203 to compensate for the deviation of the anastomosis needle 203 to the right, so that the anastomosis needle 203 can be sutured on the tissue without lateral deviation.

[0054] FIGS. 5 and 6 are left views of the firing member 1, which show the projection profile of the firing member 1 in the first plane. As shown in FIG. 6, the limiting slot 111 includes a first side wall 1111 and a second side wall 1112, which respectively extend along the length direction of the pusher surface 110, and are both circular arc-shaped. The first side wall 1111 and the second side wall 1112 are respectively symmetrically arranged with respect to the center line of the limiting slot 111. Specifically, the first projection of the limiting slot 111 in the first plane extends in a first direction, and the center line direction S4 is parallel to the first direction. In the first projection, the first side wall 1111 and the second side wall 1112 are symmetrically arranged with respect to the center line S4 of the limiting slot 111 extending in the first direction, so that the center position of the anastomosis nail 203 is opposite to the center position of the limiting slot 111, thereby providing uniform limiting blocking action to both side surfaces of the anastomosis nail 203. In other embodiments, the first side wall 1111 and the second side wall 1112 can also be asymmetrically arranged, for example, the curvature of the first side wall 1111 is greater than the curvature of the second side wall 1112, etc., which all belong to the protection scope of the present application.

[0055] In the perspective of FIG. 3 (corresponding to the plane parallel to the axial and longitudinal directions), the pusher surface 110 of the pusher portion 11 is overall arc-shaped, and the limiting groove 111 is overall arc-shaped to adapt to the shape of the pusher surface 110, so that when the limiting groove 111 abuts against the anastomosis nail 203, the limiting groove 111 and the anastomosis nail 203 are more likely to form surface contact, thereby improving the cooperation stability of the limiting groove 111 and the overall pusher portion 11 with the anastomosis nail 203. The limiting groove 111 includes a first end at the distal end and a second end at the proximal end, extends along the length direction of the pusher surface 110 from the first end to the second end, and the profile trend of the limiting groove 111 adapts to the trend of the pusher surface 110; the distal end and the proximal end are smoothly connected with the pusher surface 110, so that the limiting groove 111 is an inclined groove, and during the movement of the firing member 1 to the distal end, the anastomosis nail 203 cooperates with the limiting groove 111 at different positions from the distal end to the proximal end in turn, and the anastomosis nail 203 is always in smooth contact with the surface of the pusher portion 11 at the transition position of the pusher surface 110 and the limiting groove 111. The height of the first end of the limiting groove 111 can be selected to be lower than the height of the lowest point of the nail body 2032 of the anastomosis nail 203, so that when the pusher portion 11 abuts against the anastomosis nail 203, the limiting groove 111 can cooperate with the nail body 2032 earlier. However, the height of the first end of the limiting groove 111 can also be higher than the height of the lowest point of the nail body 2032, and the nail body 2032 cooperates with the limiting groove 111 during the rotation of the anastomosis nail 203. The length of the limiting groove 111 can be substantially the same as the length of the pusher surface 110, or can be shorter than the pusher surface 110, for example, only a small section of the limiting groove is arranged at the distal end of the pusher surface 110, or only a small section of the limiting groove is arranged at the proximal end of the pusher surface 110 close to the cutting portion 13, or only a small section of the limiting groove is arranged at the central position of the pusher surface 110, or a section of the limiting groove is arranged between the distal end and the central position of the pusher surface 110, etc., all of which are within the protection scope of the present application.

[0056] It can be understood that in the first embodiment shown in FIGS. 1-6, the pusher surface 110 can also be provided with at least one limiting groove 111 arranged in sections. For example, two limiting grooves are provided, i.e., a first position limiting groove at the proximal end and a second position limiting groove at the distal end of the first position limiting groove. The structure of the two limiting grooves can adopt the structure of the limiting groove 111 of the first embodiment, but the present application is not limited thereto.

[0057] FIGS. 7 and 8 show the structure of the firing member 2 of the present application in Embodiment 2. In Embodiment 2, the firing member 2 includes a pusher portion and a body portion, the pusher portion is at least partially located at the distal end side of the body portion, the upper surface of the pusher portion is provided with a pusher surface, and the pusher surface is provided with a limiting portion. In this embodiment, the pusher portion includes a first pusher portion 211 and a second pusher portion 221, and the body portion includes a first body portion 212 and a second body portion 222. The first pusher portion 211 and the first body portion 212 are integrally provided, and the second pusher portion 221 and the second body portion 222 are integrally provided. The proximal end side of the first body portion 212 is provided with a first fitting portion 2121, the top of the second body portion 222 is provided with a cutting portion 223, the cutting portion 223 is integrally provided with the second body portion 222, and the first pusher portion 211 and the second pusher portion 221 are both located at the distal end side of the cutting portion 223. The distal end side of the second body portion 222 is provided with a second fitting portion 2221, the first fitting portion 2121 and the second fitting portion 2221 are embeddedly connected, so that the first body portion 212 is mounted at the distal end side of the second body portion 222, and the first pusher portion 211 is located at the inner side of the second pusher portion 221 (here, the inner side means the side closer to the axis of the cartridge assembly). In this embodiment, the first fitting portion 2121 is a protrusion, and the second fitting portion 2221 is a hole, but the present application is not limited thereto, the first fitting portion can also be a hole, and the second fitting portion is a protrusion. The first fitting portion and the second fitting portion are not limited to be connected front and back, but can also be connected top and bottom, for example, the first fitting portion is a downwardly extending protrusion, and the second fitting portion is a hole accommodating the protrusion, or the second fitting portion is an upwardly extending protrusion, and the first fitting portion is a hole accommodating the protrusion, etc. Therefore, the firing member 2 in this embodiment is composed of a first component 21 (including the first pusher portion 211 and the first body portion 212) and a second component 22 (including the second pusher portion 221 and the second body portion 222) which are independent of each other and connected to each other.

[0058] In this embodiment, the firing member 2 is provided with four pusher portions: two first pusher portions 211 and two second pusher portions 221, and the staple cartridge assembly is provided with four rows of anastomosis staples correspondingly. The number of pusher portions is not limited in the present application, and the number of pusher portions provided on the first component 21 and the number of pusher portions provided on the second component 22 can be reduced or increased as needed, and alternatively, the first pusher portions 211 can also be provided on the outside of the second pusher portions 221, which also belongs to the protection scope of the present application. The upper surface of the first pusher portion 211 is provided with a first pusher surface, and the first pusher surface is provided with a first limiting portion. The upper surface of the second pusher portion 221 is provided with a second pusher surface, and the second pusher surface is provided with a second limiting portion. In this embodiment, the first limiting portion is a first limiting groove 2111 extending along the length direction of the first pusher surface. The first limiting groove 2111 includes a first end and a second end. The second end is located on the proximal side of the first end. From the first end to the second end of the first limiting groove 2111, the first limiting groove 2111 extends along the length direction of the first pusher surface, and the contour trend of the first limiting groove 2111 is adapted to the trend of the first pusher surface. The first end and the second end of the first limiting groove 2111 are respectively provided with a transition section between the first end and the first pusher surface and between the second end and the first pusher surface, so that the first end and the second end are smoothly connected to the first pusher surface. The second limiting portion is a second limiting groove 2211 extending along the length direction of the second pusher surface. The second limiting groove 2211 includes a first end and a second end. The second end is located on the proximal side of the first end. From the first end to the second end of the second limiting groove 2211, the second limiting groove 2211 extends along the length direction of the second pusher surface, and the contour trend of the second limiting groove 2211 is adapted to the trend of the second pusher surface. The first end and the second end of the second limiting groove 2211 are respectively provided with a transition section between the first end and the second pusher surface and between the second end and the second pusher surface, so that the first end and the second end are smoothly connected to the second pusher surface. During the firing process of the anastomat, when the firing member 2 moves in the distal direction, the first pusher portion 211 of the firing member 2 drives the two rows of anastomosis staples on the inner side (the side close to the shaft center of the staple cartridge assembly) of the staple cartridge assembly to rotate, and the first limiting groove 2111 guides and limits the two rows of anastomosis staples on the inner side to compensate for the lateral deviation of the anastomosis staples on the inner side. The second pusher portion 221 of the firing member 2 drives the two rows of anastomosis staples on the outer side (the side away from the shaft center of the staple cartridge assembly) of the staple cartridge assembly to rotate, and the second limiting groove 2211 guides and limits the two rows of anastomosis staples on the outer side to compensate for the lateral deviation of the anastomosis staples on the outer side. The shapes of the first limiting groove 2111 and the second limiting groove 2211 can be the same as the shape of the limiting groove 111 in Embodiment 1, but the present application is not limited thereto.

[0059] Figures 9-12 show the structure of the firing member 3 of the embodiment 3. In the embodiment 3, the firing member 3 comprises a pusher 311, a body portion, and a cutting portion 331, the pusher 311 is at least partially located at the distal end side of the body portion, the upper surface of the pusher 311 is provided with a pusher surface, the pusher surface is provided with a limiting portion, and the pusher 311 is located at the distal end side of the cutting portion 331. The body portion comprises a first body portion 312, a second body portion 322, and a third body portion 332, the first body portion 312 is integrally provided with the first pusher 311, the cutting portion 331 is integrally provided with the third body portion 332, and the cutting portion 331 is located at the top end of the third body portion 332, each cutting portion 331 corresponds to a row of the anastomosis staples. The proximal end side of the first body portion 312 is provided with a first assembly portion 313, the distal end side of the second body portion 322 is provided with a second assembly portion 323, the second body portion 322 is further provided with a third assembly portion 324, and the third body portion 332 is provided with a fourth assembly portion 334. The first assembly portion 313 and the second assembly portion 323 are embeddedly connected to enable the first body portion 312 to be installed at the distal end side of the second body portion 322. The third assembly portion 324 and the fourth assembly portion 334 are embeddedly connected to enable the third body portion 332 to be installed at the second body portion 322. In this embodiment, the first assembly portion 313 is a hole, the second assembly portion 323 is a protrusion, and the second assembly portion 323 is embedded in the first assembly portion 313. The third assembly portion 324 is a protruding column, the fourth assembly portion 334 is a hole, and the third assembly portion 324 is embedded in the fourth assembly portion 334. The structures of the first assembly portion 313, the second assembly portion 323, the third assembly portion 324, and the fourth assembly portion 334 in this embodiment are only examples and do not limit the protection scope of the present application, and other structures that can realize the connection between the first body portion 312, the second body portion 322, and the third body portion 332 all belong to the protection scope of the present application. Therefore, in this embodiment, the firing member 3 is composed of a first component 31 (including the pusher 311 and the first body portion 312), a second component 32 (including the second body portion 322), and a third component 33 (including the cutting portion 331 and the third body portion 332), which are independent of each other and connected to each other.

[0060] In the embodiment 3, the firing member 3 comprises four pusher portions 311, and the staple cartridge assembly is correspondingly provided with four rows of anastomosis staples. The limiting portion is a limiting groove 3111 extending along the length direction of the pusher surface, so as to guide and limit the anastomosis staples in the transverse direction through the limiting groove 3111 during the firing of the anastomosis device, and compensate for the transverse deviation of the anastomosis staples. As shown in FIG. 12, in the first projection of the limiting groove 3111 in the first plane, the surface of the limiting groove 3111 is a whole circular arc surface symmetrical to the center line S4. The structure of the limiting groove 3111 can also be applied to the limiting groove 111 in the embodiment 1, and can also be applied to the first limiting groove 2111 and the second limiting groove 2211 in the embodiment 2, or the structure of the limiting groove 3111 in the embodiment 3 can be replaced by the structure of the limiting groove 111 in the embodiment 1.

[0061] FIG. 13 and FIG. 14 show the structure of the firing member 3 of the embodiment 4. In the embodiment 4, the firing member 3 comprises a pusher portion, a body portion and a cutting portion 331, each of the cutting portions 331 corresponds to a row of the staples, the pusher portion is at least partially located at the distal end side of the body portion, the upper surface of the pusher portion is a pusher surface, and the pusher surface is provided with a limiting portion. The pusher portion comprises a first pusher portion 311 and a second pusher portion 321, the first pusher portion 311 and the second pusher portion 321 are both located at the distal end side of the cutting portion 331, and the body portion comprises a first body portion 312, a second body portion 322 and a third body portion 332. The first pusher portion 311 and the first body portion 312 are integrally arranged, the second pusher portion 321 and the second body portion 322 are integrally arranged, and the cutting portion 331 and the third body portion 332 are integrally arranged. The proximal end side of the first body portion 312 is provided with a first assembly portion 313, the distal end side of the second body portion 322 is provided with a second assembly portion 323, and the second body portion 322 is further provided with a third assembly portion 324. The first assembly portion 313 and the second assembly portion 323 are embeddedly connected to enable the first body portion 312 to be mounted at the distal end side of the second body portion 322. The first pusher portion 311 is located at the inner side (the side close to the shaft center of the cartridge assembly) of the second pusher portion 321. The third assembly portion 324 and the fourth assembly portion 334 are embeddedly connected to enable the third body portion 332 to be mounted to the second body portion 322. In this embodiment, the first assembly portion 313 is a downwardly extending convex column, the second assembly portion 323 is a hole, and the first assembly portion 313 is embedded in the second assembly portion 323. The third assembly portion 324 is a convex column, the fourth assembly portion 334 is a hole, and the third assembly portion 324 is embedded in the fourth assembly portion 334. The structures of the first assembly portion 313, the second assembly portion 323, the third assembly portion 324 and the fourth assembly portion 334 in this embodiment are only examples, and do not limit the protection scope of the present application. Other structures that can realize the connection of the first body portion 312, the second body portion 322 and the third body portion 332 all belong to the protection scope of the present application. Therefore, in this embodiment, the firing member 3 is composed of the first component 31 (including the first pusher portion 311 and the first body portion 312), the second component 32 (including the second pusher portion 321 and the second body portion 322) and the third component 33 (including the cutting portion 331 and the third body portion 332) which are independent of each other and connected to each other.

[0062] In this embodiment, the firing member 3 is provided with four pusher portions 311 in total, two first pusher portions 311 and two second pusher portions 321, and the staple cartridge assembly is provided with four rows of anastomosis staples correspondingly. The upper surface of the first pusher portion 311 is a first pusher surface, and the first pusher surface is provided with a first limiting portion. The upper surface of the second pusher portion 321 is a second pusher surface, and the second pusher surface is provided with a second limiting portion. In this embodiment, the first limiting portion is a first limiting groove 3111, and the second limiting portion is a second limiting groove 3211. During the firing process of the anastomat, when the firing member 3 moves in the distal direction, the first pusher portion 311 of the firing member 3 drives the two rows of anastomosis staples inside the staple cartridge assembly to rotate, and the first limiting groove 3111 guides and limits the two rows of anastomosis staples inside to compensate for the lateral deviation of the inside anastomosis staples. Meanwhile, the second pusher portion 321 of the firing member 3 drives the two rows of anastomosis staples outside the staple cartridge assembly to rotate, and the second limiting groove 3211 guides and limits the two rows of anastomosis staples outside to compensate for the lateral deviation of the outside anastomosis staples.

[0063] Figs. 15-17 show the structure of the firing member 4 of the embodiment 5 of the present application. In the embodiment 5, the firing member 4 comprises a pusher portion 41, a body portion 42, and a cutting portion 43. The cutting portion 43 is located at the top of the body portion 42, and the pusher portion 41 is located at least partially on the distal side of the body portion 42 and on the distal side of the cutting portion 43. The upper surface of the pusher portion 41 is provided with a pusher surface 410, and the pusher surface 410 is provided with a plurality of limiting portions 411 arranged at intervals. The plurality of limiting portions 411 are arranged along the length direction of the pusher surface 410 of the pusher portion 41. Further, the limiting portions 411 are protruding portions protruding towards the distal direction, and the surface of each limiting portion 411 is provided with a limiting groove 412 recessed towards the proximal direction. Therefore, the limiting portions in this embodiment are divided into multiple segments, and when the anastomosis staples are rotated to different angles, the limiting grooves 412 at different positions abut against the anastomosis staples and guide and limit the anastomosis staples. The plurality of limiting portions 411 can be uniformly arranged, or can be unevenly distributed, and the length and position of the limiting portions 411 are designed according to the specific position of the anastomosis staples. For example, in one implementation, by simulating and analyzing the rotation process of the anastomosis staples driven by the firing member 4 in advance, the position where the anastomosis staples are likely to be subjected to relatively large resistance is determined, and a limiting groove 412 is arranged at this position, so that the use requirement of the actual application scenario can be better met.

[0064] Figure 18 shows a partial structure of the firing member 5a according to an embodiment 6 of the present application. In the embodiment 6, the upper surface of the pusher portion 51a of the firing member 5a is provided with a pusher surface, and the pusher surface is provided with a limiting portion, which is a limiting groove 511a. In the first projection of the limiting groove 511a in the first plane, the side wall of the limiting groove 511a is not symmetrically arranged relative to the center line S4, but is a circular arc that is biased to the right side (here, the left side and the right side are relative to the center line S4 in the perspective of Figure 18). Such a limiting groove 511a can be applied to a scenario where it is necessary to emphasize the avoidance of the anastomosis needle from being offset to the right side. When the anastomosis needle has a tendency to be offset to the right side, the side wall of the limiting groove 511a gives the anastomosis needle a force to compensate for the lateral offset, thereby preventing the anastomosis needle from being offset to the right side.

[0065] Figure 19 shows a partial structure of the firing member 5b according to an embodiment 7 of the present application. In the embodiment 7, the upper surface of the pusher portion 51b of the firing member 5b is provided with a pusher surface, and the pusher surface is provided with a limiting portion, which is a limiting groove 511b. In the first projection of the limiting groove 511b in the first plane, the side wall of the limiting groove 511b is not symmetrically arranged relative to the center line S4, but is a circular arc that is biased to the left side (here, the left side and the right side are relative to the center line S4 in the perspective of Figure 19). Such a limiting groove 511b can be applied to a scenario where it is necessary to emphasize the avoidance of the anastomosis needle from being offset to the left side. When the anastomosis needle has a tendency to be offset to the left side, the side wall of the limiting groove 511b gives the anastomosis needle a force to compensate for the lateral offset, thereby preventing the anastomosis needle from being offset to the left side.

[0066] Figure 20 shows a partial structure of the firing member 5c according to an embodiment 8 of the present application. In the embodiment 8, the upper surface of the pusher portion 51c of the firing member 5c is provided with a pusher surface, and the pusher surface is provided with a limiting portion, which is a limiting groove 511c. In the first projection of the limiting groove 511c in the first plane, the first side wall and the second side wall of the limiting groove 511c are not circular arc surfaces, but are inclined planes. Similarly, when the anastomosis needle has a tendency to be offset in the corresponding direction, the side wall of the limiting groove 511c gives the anastomosis needle a force to compensate for the lateral offset.

[0067] The structure of any one of the limiting grooves in the above embodiments 6-8 can replace the structure of any one of the limiting grooves in the above embodiments 1-5 to form a new implementation, which is also within the protection scope of the present application. Further, for the same firing member, limiting grooves with different shapes can be provided at different positions, for example, the limiting groove 511b shown in Figure 19 is provided on the left pusher portion, and the limiting groove 511a shown in Figure 18 is provided on the right pusher portion, etc., which are all within the protection scope of the present application.

[0068] FIG. 21 shows a partial structure of the firing member 6 according to an embodiment 9 of the present application. FIG. 22 shows a partial structure of the firing member 6 according to an embodiment 10 of the present application. In the embodiments 9 and 10, the upper surface of the pusher portion 61 of the firing member 6 is provided with a pusher surface 610, which is provided with a limiting portion including a limiting protrusion 62 protruding toward the distal end, which is arranged along the length direction of the pusher surface 610. When the firing member 6 moves to the position where the pusher portion 61 abuts against the anastomosis needle, the limiting protrusion 62 is at least partially located outside and / or inside the corresponding anastomosis needle (here, the outside and inside of the anastomosis needle are relative to the axis of the cartridge assembly, the side away from the axis of the cartridge assembly is the outside, and the side close to the axis of the cartridge assembly is the inside), so as to compensate for the lateral deviation of the anastomosis needle to the outside and / or the inside. Specifically, when it is necessary to compensate for the lateral deviation of the anastomosis needle to the outside and the inside at the same time, the limiting protrusion 62 is at least partially located outside and inside the corresponding anastomosis needle. That is, the projection of the limiting protrusion 62 on the first plane has a part located outside the second projection of the anastomosis needle on the first plane, which is used to compensate for the lateral deviation of the anastomosis needle to the outside, and the projection of the limiting protrusion 62 on the first plane has a part located inside the second projection of the anastomosis needle on the first plane, which is used to compensate for the lateral deviation of the anastomosis needle to the inside. When it is only necessary to compensate for the lateral deviation of the anastomosis needle to the outside, the projection of the limiting protrusion 62 on the first plane is at least partially located outside the second projection of the anastomosis needle on the first plane. When it is only necessary to compensate for the lateral deviation of the anastomosis needle to the inside, the projection of the limiting protrusion 62 on the first plane is at least partially located inside the second projection of the anastomosis needle on the first plane.

[0069] Fig. 21 and Fig. 22 show two different structures of the limiting protrusion 62. As shown in Fig. 21, in embodiment 9, the limiting protrusion 62 comprises two limiting protrusions respectively arranged on the left and right sides of the pushing surface 610, the projection of the left limiting protrusion on the first plane is at least partially located inside the second projection of the anastomosis needle on the first plane, and the projection of the right limiting protrusion on the first plane is at least partially located outside the second projection of the anastomosis needle on the first plane. Therefore, the limiting protrusion 62 can effectively prevent the lateral deviation of the anastomosis needle to the outside and the inside. In other alternative embodiments, only one limiting protrusion can be arranged to realize the compensation in one direction, or the left limiting protrusion can be arranged on the left pushing surface and the right limiting protrusion can be arranged on the right pushing surface. As shown in Fig. 22, in embodiment 10, the limiting protrusion 62 comprises a protruding part arranged on the right side of the pushing surface 610, and the surface of the protruding part is provided with an inclined guiding surface 621. The projection of the limiting protrusion 62 on the first plane is at least partially located outside the second projection of the anastomosis needle on the first plane, which can effectively compensate the lateral deviation of the anastomosis needle to the outside. The limiting protrusion 62 in Fig. 10 can also be arranged on the left side of the center line S4, or one limiting protrusion 62 can be arranged on the left side and the right side of the center line S4, which also belongs to the protection scope of the present application.

[0070] The length of the limiting protrusion 62 in the above embodiment 9 and embodiment 10 can be set as needed, which can be substantially equal to the length of the pushing surface, or shorter than the length of the pushing surface. The limiting protrusion in any one of the above embodiment 9 and embodiment 10 can replace the structure of the limiting groove in any one of the above embodiment 1-5 to form a new embodiment. Or the limiting protrusion 62 in any one of the above embodiment 9 and embodiment 10 can also be used in combination with the limiting groove, for example, on the same striker, according to the needs of use, the limiting protrusion is arranged on part of the pushing surface, and the limiting groove is arranged on part of the pushing surface, etc. The above various modifications all belong to the protection scope of the present application.

[0071] Fig. 23 shows the structure of the firing member 7 of the embodiment 11. In this embodiment, the firing member 7 comprises a pushing portion 71, a body portion 72 and a cutting portion 73, and the pushing portion 71 is located at the distal end side of the cutting portion 73. The upper surface of the pushing portion 71 is provided with a pushing surface 710. The pushing surface 710 of the outer pushing portion 71 is provided with a limiting portion, while the pushing surface 710 of the inner pushing portion 71 is not provided with a limiting portion, and is a smooth surface as a whole. The pushing surface 710 of the outer pushing portion 71 is provided with two limiting portions: a first position limiting groove 711 and a second position limiting groove 712. The first position limiting groove 711 is located at the distal end position of the pushing surface 710, and the second position limiting groove 712 is located at the proximal end position of the pushing surface 710, i.e. the position of the pushing surface 710 close to the cutting portion 73. The first position limiting groove 711 can cooperate with the staple body when the pushing portion 71 just abuts against the outer side anastomotic staple, so as to compensate for the lateral deviation of the outer side anastomotic staple, and the second position limiting groove 712 can cooperate with the staple body when the outer side anastomotic staple is basically formed and is pushed out, so as to compensate for the lateral deviation of the outer side anastomotic staple. In another alternative embodiment, the pushing surface 710 of the inner pushing portion 71 can also be provided with the first position limiting groove 711 and the second position limiting groove 712, or other limiting portion structures, which all belong to the protection scope of the present application.

[0072] As shown in Fig. 23, in this embodiment, the first position limiting groove 711 and the second position limiting groove 712 both extend along the length direction of the pushing surface 710, and the profile trend of the first position limiting groove 711 and the second position limiting groove 712 is adapted to the trend of the pushing surface 710, the first end and the second end of the first position limiting groove 711 are both connected with the pushing surface 710 in smooth transition, and the first end and the second end of the second position limiting groove 712 are both connected with the pushing surface 710 in smooth transition, so as to realize the smooth transition of the cooperation of each position of the whole pushing portion 71 with the anastomotic staple.

[0073] Figure 24 shows the structure of the firing member 7 of the present application embodiment 12. The difference between this embodiment and embodiment 11 is that the outer pusher surface 710 is further provided with a third position limiting groove 713, which is located at the center position of the horizontal direction of the pusher surface 710. During the rotation of the anastomosis needle, the third position limiting groove 713 cooperates with the needle body to effectively compensate for the lateral deviation of the anastomosis needle during the rotation of the outer anastomosis needle. Optionally, the inner pusher surface 710 can also be provided with a first position limiting groove 711, a second position limiting groove 712 and a third position limiting groove 713 at the same time, to compensate for the lateral deviation of the inner anastomosis needle. In alternative embodiments, different modifications can be made as needed, for example, only the first position limiting groove 711 can be provided on the pusher surface 710 of one or more pusher parts 71, or only the second position limiting groove 712 can be provided, or only the third position limiting groove 713 can be provided, or only the first position limiting groove 711 and the third position limiting groove 713 can be provided, or only the second position limiting groove 712 and the third position limiting groove 713 can be provided, or the first position limiting groove 711 and the second position limiting groove 712 are connected, or the second position limiting groove 712 and the third position limiting groove 713 are connected, etc., all of which are within the scope of the present application.

[0074] The above embodiments only exemplarily show several optional embodiments of the firing member, but the present application is not limited to the structures described in the above embodiments, and other modifications and extensions can also be made, or combinations between embodiments can be made. When the firing member is provided with multiple pusher parts, the pusher surface of each pusher part can be provided with a limiting part, or only part of the pusher surfaces of the pusher parts can be provided with a limiting part. When the pusher surfaces of multiple pusher parts are provided with limiting parts, the limiting part structures of different pusher parts can be the same or different, for example, on the same firing member, the limiting parts on one or several pusher parts can adopt the limiting part structure of one of the above embodiments, and the limiting parts on the other pusher parts can adopt the limiting structure of another embodiment. The number, position, length, shape, depth / height, etc. of the limiting parts of different pusher parts can be the same or different, and can be adjusted as needed, all of which are within the scope of the present application.

[0075] Embodiments 9 and 10 above can also be modified to provide multiple segment limiting protrusions. For example, on the pusher surface of at least one pusher part, multiple segment limiting protrusions are arranged along the length direction of the pusher surface, for example, limiting protrusions are arranged at one or more of the proximal end position, the distal end position, the center position of the pusher surface, or one or more segment limiting protrusions are arranged at other positions where the lateral deviation of the anastomosis needle needs to be compensated, etc., all of which are within the scope of the present application.

[0076] The above description is further detailed in combination with specific preferred embodiments of the present application, and cannot be deemed to limit the specific implementation of the present application to these descriptions. For those of ordinary skill in the art to which the present application belongs, several simple deductions or replacements can be made without departing from the concept of the present application, and all of them shall be deemed to fall within the protection scope of the present application.

Claims

1. A firing member comprising: A staple cartridge assembly for a surgical stapler and can be driven to move along an axial direction of the surgical stapler, the staple cartridge assembly is provided with at least one row of anastomotic staples arranged along the axial direction; the firing member comprises a body portion and at least one pusher portion, the pusher portion is at least partially located on the distal side of the body portion, the upper surface of the pusher portion is provided with a pusher surface, and the pusher surface is provided with at least one limiting portion; Wherein each of the pusher portion corresponds to a row of the anastomotic staples, and when the firing member moves in the distal direction to drive the anastomotic staples, the limiting portion at least partially acts on the anastomotic staples to compensate for the lateral deviation of the anastomotic staples.

2. The firing member of claim 1, wherein, The limiting portion is a limiting groove arranged along the length direction of the pusher surface.

3. The firing member of claim 2, wherein, The anastomotic staple comprises a staple body, the limiting groove has a first projection in a first plane perpendicular to the axial direction, and the staple body has a second projection in the first plane, and the two sides of the first projection are located outside the two sides of the second projection.

4. The firing member of claim 2, wherein, The limiting groove comprises a first side wall and a second side wall respectively extending along the length direction of the pusher surface, and the first side wall and the second side wall are symmetrically arranged with respect to the center line of the limiting groove.

5. The firing member of claim 1, wherein, The limiting portion comprises a first end and a second end, the second end is located on the proximal side of the first end, and from the first end to the second end of the limiting portion, the limiting portion extends along the length direction of the pusher surface, and the contour trend of the limiting portion adapts to the trend of the pusher surface; the first end and the second end are smoothly connected with the pusher surface.

6. The firing member of claim 1, wherein, The limiting groove is a circular arc shape that adapts to the shape of the pusher surface.

7. The firing member of claim 1, wherein, The body portion comprises a first body portion and a second body portion, the pusher portion is fixedly connected with the first body portion, and the first body portion is installed on the distal side of the second body portion.

8. The firing member of claim 1, wherein, The pusher portion comprises a first pusher portion and a second pusher portion, the body portion comprises a first body portion and a second body portion, the first pusher portion and the first body portion are fixedly connected, the second pusher portion and the second body portion are fixedly connected, the first body portion is installed on the distal side of the second body portion, and the first pusher portion is located on the inner side of the second pusher portion.

9. The firing member of claim 1, wherein, The limiting portion comprises at least two limiting portions arranged at intervals, and the limiting portions are arranged along the length direction of the pusher surface.

10. The firing member of claim 9, wherein, The limiting portion is a protruding portion, and the surface of each limiting portion is provided with a limiting groove.

11. The projectile of claim 1 wherein, The limiting portion comprises a limiting protruding portion arranged along the length direction of the pusher surface, and when the firing member moves to abut against the anastomotic staple, the limiting protruding portion is at least partially located on the outer side of the corresponding anastomotic staple and / or the inner side of the anastomotic staple to compensate for the lateral deviation of the anastomotic staple to the outer side and / or the inner side.

12. A staple cartridge assembly comprising: The firing member of any one of claims 1 to 11.

13. A surgical stapler, characterized by, The staple cartridge assembly of claim 12.

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