Staple cartridge assembly and medical stapler

Abstract

A staple cartridge assembly and a medical stapler, the staple cartridge assembly including a staple band 2, a support member 3, a staple cartridge cover 1, and a firing block 4, the staple band 2 including a staple band body 21, the staple band body 21 being attached to one side of the support member 3 and including a first surface 211 away from the support member 3, the staple cartridge cover 1 at least partially covering the first surface 211 of the staple band body 21, the staple cartridge cover 1 including a second surface 13 facing the first surface 211 of the staple band body 21, and including a first gap 6 between the first surface 211 of the staple band body 21 and the second surface 13 of the staple cartridge cover 1, the firing block 4 being movably disposed at a bottom of the staple cartridge cover 1 and being movable along an axial direction, the firing block 4 including a staple cutting portion 41, and a height P1 of a highest point of the staple cutting portion 41 being higher than a height P2 of the first surface 211 of the staple band body 21. In the present invention, by providing a first gap 6 between the first surface 211 of the staple band body 21 and the second surface 13 of the staple cartridge cover 1, the staple cutting portion 41 of the firing block 4 is made higher than the first surface 211 of the staple band body 21, making it easier for the staple cutting portion 41 to drive the stapler staple 22 to separate it from the staple band 2.

Description

[Technical field]

[0001] The present invention relates to the field of medical instruments, and more particularly to a staple cartridge assembly and a medical stapler. [Background technology]

[0002] In the prior art, medical staplers generally include an instrument platform, a firing handle movably connected to the instrument platform, and a staple head attached to the instrument platform. The staple head can be passed through a small incision in the body by a piercer to access a surgical site and perform the procedure. The staple head includes an oppositely disposed staple cartridge assembly and a staple anvil. The staple cartridge assembly includes a staple band, a support member supporting the staple band, and a staple cartridge cover housing the staple band and the support member, the staple cartridge cover including a firing block at a proximal end. When the stapler is fired, the cutter is driven to move distally by the cutter pusher bar, the cutter drives the firing block to move in the direction of the distal end of the stapler, the firing block pushes outward the stapler staples rotatably connected to the staple band body, the staple cutting portion of the firing block drives the stapler staples to separate from the staple band body, and the cutter cuts tissue disposed between the staple cartridge assembly and the staple anvil to fire the stapler.

[0003] In a conventional stapler, the inner surface of the staple cartridge cover is in close contact with the upper surface of the staple band. The height of the staple cutting portion disposed at the tip of the firing block may be lower than the height of the upper surface of the staple band or may be the same as the height of the upper surface of the staple band, and the staple cutting portion may not easily drive the staple for the stapler to separate from the staple band body during the movement of the firing block toward the distal end side, resulting in a situation in which the staple for the stapler cannot be released from the staple band body.

[0004] In the present invention, the distal end side and the proximal end side are relative to the operator, and the end closer to the operator is the proximal end side, and the end farther from the operator, i.e., the end closer to the surgical position, is the distal end side. In a stapler, the inside and outside are relative to the axis of the stapler, and the side closer to the axis is the inside and the side farther from the axis is the outside. Summary of the Invention [Problem to be solved by the invention]

[0005] In addressing the problems of the prior art, an object of the present invention is to provide a staple cartridge assembly and a medical stapler in which a first gap is provided between a first surface of a staple band body and a second surface of a staple cartridge cover, such that a staple cutting portion of a firing block is higher than the first surface of the staple band, and the staple cutting portion is easily driven to separate a stapler staple from the staple band. [Means for solving the problem]

[0006] An embodiment of the present invention provides a staple cartridge assembly for use in a medical stapler, comprising: the staple cartridge assembly includes a staple band, a support member, a staple cartridge cover, and a firing block; the staple band comprises a staple band body extending in an axial direction of the stapler, the staple band body being attached to one side of the support member, the staple band body having a first surface remote from the support member; the staple cartridge cover at least partially covers a first surface of the staple band body, the staple cartridge cover having a second surface opposing the first surface of the staple band body, and a first gap between the first surface of the staple band body and the second surface of the staple cartridge cover; The firing block is movably disposed at the bottom of the staple cartridge cover and is movable along the axial direction, the firing block including a staple cutting portion, the height of the highest point of the staple cutting portion being greater than the height of the first surface of the staple band body.

[0007] In some embodiments, the apex of the staple-cutting portion of the firing block abuts a second surface of the staple cartridge cover.

[0008] In some embodiments, the height of the lowest point of the staple cutting portion of the firing block is less than the height of the first surface of the staple band body.

[0009] In some embodiments, the staple band further comprises a staple for a stapler, the staple for a stapler being rotatably connected to the staple band by a staple connecting portion, and a height of a highest point of the staple cutting portion of the firing block is greater than a height of the staple connecting portion.

[0010] In some embodiments, at least one protrusion is further provided, the protrusion including a first portion disposed between a first surface of the staple band body and a second surface of the staple cartridge cover, and a height of the first portion of the protrusion is equal to a height of the first gap.

[0011] In some embodiments, the protrusion is disposed on the support member or on the staple band body, and a surface of the protrusion facing away from the staple band body abuts a second surface of the staple cartridge cover.

[0012] In some embodiments, a surface of the protrusion facing away from the staple band body is flush with and in close contact with a second surface of the staple cartridge cover.

[0013] In some embodiments, at least one first protrusion is provided on a surface of the support member, the height of the surface of the first protrusion away from the support member being higher than the height of a first surface of the staple band body, and the surface of the first protrusion away from the support member abuts against a second surface of the staple cartridge cover.

[0014] In some embodiments, the lateral distance between the inner and outer surfaces of the first protrusion is smaller than the lateral distance between the inner and outer surfaces of the staple band body, at least one mounting hole is provided on a surface of the staple band body, and the first protrusion is positioned through the mounting hole.

[0015] In some embodiments, the first projection is a boss, the projection of which on the first surface of the staple band body is a rectangle with rounded corners.

[0016] In some embodiments, the staple cartridge assembly includes a plurality of staple bands arranged along the axial direction, and the first protrusion is located between the staple band bodies of two adjacent staple bands.

[0017] In some embodiments, the first prong is fixedly connected to the staple band body.

[0018] In some embodiments, at least one second protrusion is provided on a surface of the support member, the second protrusion being located on the proximal end side and / or the distal end side of the support member, the height of the surface of the second protrusion away from the support member being higher than the height of the first surface of the staple band body, and the surface of the second protrusion away from the support member abutting against the second surface of the staple cartridge cover.

[0019] In some embodiments, the second prong is fixedly connected to the staple band body.

[0020] In some embodiments, the surface of the support member is further provided with at least one first protrusion distributed in the axial direction, the surface of the first protrusion facing away from the support member being flush with the surface of the second protrusion facing away from the support member.

[0021] In some embodiments, a first surface of the staple band body is provided with at least one third protrusion, and a surface of the third protrusion away from the staple band body abuts against the second surface of the staple cartridge cover.

[0022] In some embodiments, the second surface of the staple cartridge cover is provided with a fourth protrusion that protrudes toward the staple band, and a surface of the fourth protrusion facing the staple band body abuts against a first surface of the staple band body.

[0023] In some embodiments, a surface of the fourth prong facing the staple band body is flush with and in close contact with a first surface of the staple band body.

[0024] In some embodiments, the staple cartridge cover further comprises a third surface opposite the second surface, and a lower surface of the firing block abuts against the third surface of the staple cartridge cover.

[0025] In some embodiments, the stapler staples are biocompatible, degradable stapler staples and / or the stapler staples are biocompatible, bioabsorbable stapler staples.

[0026] In some embodiments, the surface of the staple for the stapler is provided with a biocompatible degradable and bioabsorbable coating and / or the surface of the staple for the stapler is provided with a magnetic coating, and the staple for the stapler is magnetized under the action of an external magnetic field.

[0027] An embodiment of the present invention provides a medical stapler including the staple cartridge assembly described above.

[0028] The staple cartridge assembly and medical stapler provided by the present invention have the following advantages: The present invention provides a staple cartridge assembly for use in a medical stapler, in which a first gap is provided between a first surface of a staple band body and a second surface of a staple cartridge cover, so that the height of the highest point of the staple cutting portion of the firing block is higher than the first surface of the staple band, making it easier for the staple cutting portion of the firing block to separate the stapler staples from the staple band, and therefore, when the stapler staples are fired, the firing block can push the stapler staples toward the staple anvil to close them against tissue. [Brief description of the drawings]

[0029] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which: [Figure 1] FIG. 1 is a schematic diagram showing a structure of a staple cartridge assembly according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a front view of a staple cartridge assembly according to a first embodiment of the present invention. [Diagram 3] FIG. 2 is an exploded view of a staple cartridge assembly according to a first embodiment of the present invention. [Figure 4] FIG. 1 is a top view of a staple cartridge assembly according to a first embodiment of the present invention. [Diagram 5] 5 is a cross-sectional view taken along the line A1-A1 in FIG. 4. [Figure 6] 5 is a cross-sectional view taken along the line A2-A2 in FIG. 4. [Figure 7] FIG. 2 is a left side view of the staple cartridge assembly of the first embodiment of the present invention. [Figure 8] 1 is a partial schematic view of a staple cartridge assembly according to a first embodiment of the present invention, with a staple cartridge cover omitted. FIG. [Figure 9] 11 is a partial schematic view of a staple cartridge assembly according to a second embodiment of the present invention, with the staple cartridge cover omitted. FIG. [Figure 10] 11 is a schematic diagram of cooperation of a staple band and a staple cartridge cover according to a second embodiment of the present invention; FIG. [Figure 11] FIG. 10 is a schematic diagram of a structure of a staple cartridge cover according to a third embodiment of the present invention. [Figure 12] 13 is a partial schematic view of a staple cartridge assembly of a third embodiment of the present invention, with the staple cartridge cover omitted. FIG. [Figure 13] 13 is a schematic diagram of the structure of a staple cartridge assembly of a fourth embodiment of the present invention, with the staple cartridge cover omitted. FIG. [Figure 14] FIG. 10 is a schematic diagram of a structure of a staple band according to a fourth embodiment of the present invention. [Figure 15] FIG. 10 is a schematic diagram of a structure of a support member according to a fourth embodiment of the present invention. [Figure 16] 13 is a partial schematic view of a staple cartridge assembly of a fourth embodiment of the present invention, with the staple cartridge cover omitted. FIG. [Figure 17] FIG. 10 is a schematic diagram of the cooperation of a staple band and a support member according to a fifth embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Next, exemplary embodiments will be described in more detail with reference to the accompanying drawings. However, exemplary embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete, and the concept of exemplary embodiments will be fully conveyed to those skilled in the art. The same attached reference numerals in the drawings indicate the same or similar structures, and therefore repeated description thereof will be omitted.

[0031] The present invention provides a staple cartridge assembly and a medical stapler including the same, the medical stapler comprising an instrument platform, a firing handle movably connected to the instrument platform, and a staple head attached to the instrument platform, the staple head comprising an opposedly disposed staple cartridge assembly and a staple anvil, the staple cartridge assembly including a staple band, a support member, a staple cartridge cover, and a firing block, the staple band comprising a staple band body extending in an axial direction of the stapler, the staple band body attached to one side of the support member, the staple band body comprising a first surface remote from the support member, the staple cartridge cover at least partially covering the first surface of the staple band body, the staple cartridge cover comprising a second surface opposite the first surface of the staple band body, and the staple cartridge cover covering the staple band body from the staple band body. The staple cartridge cover has a first gap between its first surface and a second surface, the firing block is movably arranged at the bottom of the staple cartridge cover, the firing block is positioned at the proximal end side of the staple cartridge cover in an initial state and is movable along the axial direction, the firing block includes a staple cutting portion, the height of the highest point of the staple cutting portion is higher than the height of the first surface of the staple band body, and the staple cutting portion is used to activate a stapler staple to separate from the staple band body when the stapler is fired.

[0032] Therefore, in the present invention, by providing a first gap between the first surface of the staple band body and the second surface of the staple cartridge cover so that the height of the highest point of the staple cutting portion of the firing block is higher than the height of the first surface of the staple band, it becomes easier for the staple cutting portion of the firing block to drive the stapler staples to separate them from the staple band, and it is ensured that when the stapler is fired, the firing block pushes the stapler staples toward the staple anvil to close them against the tissue.

[0033] The structure of the staple cartridge assembly of each specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that each specific embodiment should not be construed as limiting the scope of protection of the present invention.

[0034] 1 to 8 show the structure of a staple cartridge assembly according to a first embodiment of the present invention. As shown in FIGS. 1 to 3, the staple cartridge assembly includes a staple band 2, a support member 3 for supporting the staple band 2, a staple cartridge cover 1 that houses the support member 3 and the staple band 2, and a firing block 4 that at least partially enters the staple cartridge cover 1. The staple band 2 includes a staple band body 21 extending in the axial direction and a stapler staple 22 attached to the staple band body 21, and the stapler staple 22 is rotatably connected to the staple band body 21 by a staple connection portion 221. The staple cartridge assembly further includes a fixing member 5, and a distal end side 31 of the support member 3 and a distal end side 11 of the staple cartridge cover 1 are fixed to the fixing member 5. In this embodiment, two support members 3, two staple bands 2, and two staple cartridge covers 1 are provided, and the two staple bands 2 are respectively provided on the corresponding support members 3, and staples 22 are provided on both sides of each staple band 2, and the staple cartridge cover 1 is sleeved on the outside of the support members 3 and the staple band 2. In other alternative embodiments, the number of the support members 3, the staple bands 2, and the staple cartridge covers 1 are not limited to those shown in the drawings, and can be changed as required, and the staple band 2 can be provided with staples 22 on only one side, all of which are within the protection scope of the present invention. Figure 3 only exemplarily shows a part of the staples 22 for the stapler, and in actual application, the number and arrangement of the staples 22 for the stapler can be selected as required.

[0035] The staple band body 21 is attached to one side of the support member 3 in the view of Fig. 3 and Fig. 5, i.e., the staple band body 21 is provided on the upper side of the support member 3, and the staple band body 21 includes a first surface 211 away from the support member 3, i.e., the upper surface of the staple band body 21 is this first surface 211. As shown in Figs. 3 to 5, the staple cartridge cover 1 at least partially covers the first surface 211 of the staple band body 21, and the staple cartridge cover 1 includes a second surface 13 facing the first surface 211 of the staple band body 21. The second surface 13 of the staple cartridge cover 1 is a surface of the staple cartridge cover 1 facing the staple band body 21, and in this embodiment, the second surface 13 of the staple cartridge cover 1 is an inner surface of an upper plate of the staple cartridge cover. The staple cartridge cover 1 further includes a fourth surface 15 located outwardly of the second surface 13, i.e., an outer surface of a top plate of the staple cartridge cover 1. The top plate of the staple cartridge cover 1 is provided with staple holes 14 extending therethrough.

[0036] In the present invention, the distal end side and the proximal end side are relative to the operator, and the end closer to the operator is the proximal end side, and the end farther from the operator, i.e., the end closer to the surgical position, is the distal end side, and the direction along the axis of the stapler is the axial direction, i.e., the direction from the distal end side to the proximal end side of the stapler, or the direction from the proximal end side to the distal end side of the stapler. For example, in the field of view of FIG. 1, the distal end side 11 is the right side and the proximal end side 12 is the left side for the staple cartridge cover 1. In the field of view of FIG. 15, the distal end side 31 is the right side and the proximal end side 32 is the left side for the support member 3. In the present invention, the S1 direction is the direction from the proximal end side to the distal end side of the stapler, and the S1 direction or the opposite direction to the S1 direction is defined as the axial direction of the stapler. The S2 direction shown in FIGS. 5 to 7 is defined as the vertical direction, i.e., the height direction. The S3 direction perpendicular to the S1 and S2 directions is defined as the lateral direction, i.e., the width direction. In the present invention, the inside and outside of the members are relative to the axis of the stapler, and the side closer to the axis is defined as the inside and the side away from the axis is defined as the outside.

[0037] As shown in Figs. 3 to 5, there is a first gap 6 between the first surface 211 of the staple band body 21 and the second surface 13 of the staple cartridge cover 1, and the height of this first gap 6 is h1. The height h1 of this first gap 6 varies depending on the dimensions of the staple cartridge assembly and can take different values. The firing block 4 is initially located at the proximal end side 12 of the staple cartridge cover 1 and is movable along the axial direction. As shown in Figs. 7 and 8, the firing block 4 includes a staple cutting portion 41 and a staple pushing portion 42, and the staple pushing portion 42 is located at the distal end side of the staple cutting portion 41. When the stapler is fired, first, the staple pushing portion 42 contacts the staple 22 for stapler, pushing the staple 22 for stapler to rotate closed, causing the staple legs of the staple 22 for stapler to extend outward from the staple hole 14 of the staple cartridge cover 1, and then the staple cutting portion 41 contacts the staple connecting portion 221, cutting the staple, cutting the staple connecting portion 221, and separating the staple 22 for stapler from the staple band body 21, and the staple 22 for stapler is pushed out as a whole from the staple hole 14 of the staple cartridge cover 1, so that it can be anastomosed to tissue. As shown in FIG. 8, the height P1 of the highest point of the staple cutting portion 41 is higher than the height P2 of the first surface 211 of the staple band body 21, which facilitates the staple cutting portion 41 of the firing block 4 to drive the stapler staples 22 to separate from the staple band 2, thereby ensuring that when the stapler is fired, the firing block 4 pushes the stapler staples 22 toward the staple anvil to close on the tissue.

[0038] As shown in FIG. 7, in this embodiment, the highest point of the staple cutting portion 41 of the firing block 4 abuts against the second surface 13 of the staple cartridge cover 1, and the staple cutting portion 41 of the firing block 4 can make full use of the first gap 6 to better separate the stapler staples 22 from the staple band 2. The staple cartridge cover 1 further includes a third surface 16 provided opposite to the second surface 13, and the lower surface of the firing block 4 abuts against the third surface 16 of the staple cartridge cover 1. In this embodiment, the third surface 16 of the staple cartridge cover 1 is the upper surface of the lower plate of the staple cartridge cover 1. The third surface 16 and the second surface 13 of the staple cartridge cover 1 hold the firing block 4 in a stable position in the height direction. The height of the highest point of the staple cutting portion 41 of the firing block 4 is also maintained continuously higher than the height of the first surface 211 of the staple band body 21 as the firing block 4 moves in the axial direction within the staple cartridge cover 1, so that all of the stapler staples 22 can be normally separated from the staple band body 21.

[0039] 8, in this embodiment, the height P3 of the lowest point of the staple cutting portion 41 of the firing block 4 is lower than the height P2 of the first surface 211 of the staple band body 21. The height P1 of the highest point of the staple cutting portion 41 of the firing block 4 is higher than the height of the staple connecting portion 221. Therefore, the staple cutting portion 41 of the firing block 4 is at least partially aligned with the staple connecting portion 221 in the axial direction, which can ensure that the stapler staples 22 are completely separated from the staple band body 21 and anastomosed to tissue when the stapler is fired.

[0040] As shown in Figures 3 to 8, in this embodiment, at least one first protrusion 33 is provided on the surface of the support member 3, and the height of the surface of the first protrusion 33 away from the support member 3 (i.e., the upper surface of the first protrusion 33) is higher than the height of the first surface 211 of the staple band main body 21, and the upper surface of the first protrusion 33 abuts against the staple cartridge cover 1, and due to the abutting action of the first protrusion 33, there is the first gap 6 between the first surface 211 of the staple band main body 21 and the second surface 13 of the staple cartridge cover 1. The first protrusion 33 includes a first portion positioned between the second surface 13 of the staple cartridge cover 1 and the first surface 211 of the staple band body 21, and a second portion positioned between the first surface 211 of the staple band body 21 and the upper surface of the support member 3, and the height of the first portion of the first protrusion 33 is the height of the portion of the first protrusion 33 protruding from the first surface 211 of the staple band body 21, and this height is equal to the height h1 of the first gap 6.

[0041] As shown in Figures 3 and 6, in this embodiment, the surface of the first protrusion 33 on the side remote from the staple band body 21 is parallel to and in close contact with the second surface 13 of the staple cartridge cover 1, so that the stability of cooperation between the first protrusion 33 and the staple band body 21 can be increased. As shown in Figures 3 and 8, the lateral distance between the inner surface and the outer surface of the first protrusion 33 is smaller than the lateral distance between the inner surface and the outer surface of the staple band body 21, i.e., the lateral width of the first protrusion 33 is smaller than the lateral width of the staple band body 21, and at least one mounting hole 212 is provided on the surface of the staple band body 21, and the first protrusion 33 is provided to penetrate the mounting hole 212. Preferably, the first protrusion 33 is fixedly connected to the mounting hole 212 by welding.

[0042] As shown in Fig. 8, in this embodiment, the first protrusion 33 is a boss, and the projection of the boss on the first surface 211 of the staple band body 21 is a rectangle with rounded corners, that is, all corners of the boss are provided with guide surfaces having circular arcs, and when the staple band 2 is assembled to the support member 3, the guide surfaces of the circular arcs can better guide the boss into the mounting hole 212. Here, the shape of the first protrusion 33 is merely exemplary, and in other alternative embodiments, the first protrusion 33 can also have other shapes, for example, the projection of the first protrusion 33 on the first surface 211 of the staple band body 21 is a rectangle, a triangle, a rhombus, a trapezoid, etc., and the area of ​​the upper surface and the area of ​​the lower surface of the first protrusion 33 can be different, for example, the first protrusion 33 can be a cone structure with a large area of ​​the lower surface and a small area of ​​the upper surface, all of which are within the protection scope of the present invention. The number of the first protrusions 33 and the mounting holes 212 may be provided in one-to-one correspondence, or the number of the mounting holes 212 may be greater than the number of the first protrusions 33 .

[0043] In this embodiment, the surface of the support member 3 is further provided with two second protrusions 34, the two second protrusions 34 being located at the proximal end side and the distal end side of the support member 3, respectively, the height of the surface of the second protrusions 34 on the side away from the support member 3 (the upper surface of the second protrusions 34) is higher than the height of the first surface 211 of the staple band body 21, and the upper surface of the second protrusions 34 abuts against the second surface 13 of the staple cartridge cover 1. The upper surface of the first protrusions 33 has the same height as the upper surface of the second protrusions 34. In this embodiment, the lateral distance between the inner surface and the outer surface of the second protrusions 34 is equal to the lateral distance between the inner surface and the outer surface of the staple band body 21. Preferably, the second protrusions 34 may be fixedly connected to the staple band body 21 by welding.

[0044] In this embodiment, the number and arrangement of the first protrusions 33 can be selected as desired and can be distributed uniformly or non-uniformly along the axial direction on the surface of the support member 3; in another alternative embodiment, the surface of the support member 3 can be provided with only the first protrusions 33 and not with the second protrusions 34; in a further alternative embodiment, the surface of the support member 3 can be provided with only the second protrusions 34 and not with the first protrusions 33. In a further alternative embodiment, the second protrusions 34 can be provided only on the distal end side or only on the proximal end side; in yet another alternative embodiment, the second protrusions 34 can be the same shape and size as the first protrusions 33.

[0045] 9 and 10 show the structure of a staple cartridge assembly according to a second embodiment of the present invention. This embodiment is different from the first embodiment in that the surface of the support member 3 is not provided with the first protrusion 33 and the second protrusion 34, and at least one third protrusion 213 is provided on the first surface 211 of the staple band body 21, and the surface of the third protrusion 213 on the side away from the staple band body 21 (the upper surface of the third protrusion 213) abuts against the second surface 13 of the staple cartridge cover 1 to form a first gap 6 between the first surface 211 of the staple band body 21 and the second surface 13 of the staple cartridge cover 1. The height of the third protrusion 213 is equal to the height h1 of the first gap 6. The upper surface of the third protrusion 213 is parallel to and in close contact with the second surface 13 of the staple cartridge cover 1, improving the stability of the cooperation. The shape, size, number and arrangement of the third protrusions are not limited to those shown in the drawings and can be selected and set as desired. The adoption of this embodiment also achieves the purpose of making it easier for the staple cutting portion 41 of the firing block 4 to drive the staples 22 for the stapler to separate from the staple band 2.

[0046] 11 and 12 are diagrams showing the structure of a staple cartridge assembly according to a third embodiment of the present invention. This embodiment is different from the first embodiment in that the support member 3 does not have a first protrusion 33 and a second protrusion 34 on its surface, but has a fourth protrusion 17 extending toward the staple band 2 on the second surface 13 of the staple cartridge cover 1, and the surface of the fourth protrusion 17 facing the staple band body 21 (the lower surface of the fourth protrusion 17) abuts against the first surface 211 of the staple band body 21. The height of the fourth protrusion 17 is equal to the height h1 of the first gap 6. The lower surface of the fourth protrusion 17 is parallel to the first surface 211 of the staple band body 21 and is in close contact with each other, improving the stability of the operation. The shape, size, number and arrangement of the fourth protrusion 17 are not limited to those shown in the drawings, and can be selected and set as desired. Similarly, by employing this embodiment, the staple cutting portion 41 of the firing block 4 can achieve the purpose of easily driving the stapler staples 22 to separate from the staple band 2.

[0047] The protrusions in the above-mentioned first, second and third embodiments are provided on the support member 3, the staple band body 21 and the staple cartridge cover 1, respectively, to realize the first gap 6 between the first surface 211 of the staple band body 21 and the second surface 13 of the staple cartridge cover 1. In other alternative embodiments, the above three embodiments can be used in combination, for example, by simultaneously providing two or more of the first protrusion 33, the second protrusion 34, the third protrusion 213 and the fourth protrusion 17, all of which are within the protection scope of the present invention.

[0048] 13 to 16 show the structure of a staple cartridge assembly according to a fourth embodiment of the present invention. In this embodiment, similar to the first embodiment, a first protrusion 33 and two second protrusions 34 are provided on the surface of the support member 3. The two second protrusions 34 are disposed on the distal end side 31 and the proximal end side 32 of the support member 3, the first protrusion 33 is disposed between the two second protrusions 34, and the upper surface of the first protrusion 33 and the upper surface of the second protrusion 34 abut against the second surface 13 of the staple cartridge cover 1, respectively. The fourth embodiment is different from the first embodiment in that, in this embodiment, the staple cartridge assembly includes a plurality of staple bands 2, the plurality of staple bands 2 are arranged in the axial direction, and the first protrusions 33 are disposed between the staple band bodies 21 of the two adjacent staple bands 2. The two second protrusions 34 are located at the distal end side of the farthest staple band 2 and the proximal end side of the nearest staple band 2, respectively. In this embodiment, the first protrusion 33 and / or the second protrusion 34 are preferably fixedly connected to the staple band body 21. For example, the first protrusion 33 and the second protrusion 34 are each fixedly connected to the staple band body 21 by welding or the like.

[0049] As shown in Figures 13 to 15, in this embodiment, the lateral distance between the inner and outer surfaces of the first protrusion 33 is equal to the lateral distance between the inner and outer surfaces of the staple band body 21, i.e., the lateral width of the first protrusion 33 is equal to the lateral width of the staple band body 21, thereby improving the positioning of the attachment of the plurality of staple bands 2 and better maintaining the stability of the staple bands 2. In another alternative embodiment, the lateral distance between the inner and outer surfaces of the first protrusion 33 can also be smaller than the lateral distance between the inner and outer surfaces of the staple band body 21, for example, the same shape and size as the first protrusion 33 in the first embodiment can be used, which also falls within the scope of protection of the present invention.

[0050] Similarly, many variations are possible for this fourth embodiment, all of which are within the scope of protection of the present invention. The number, size, shape and arrangement of the first protrusions 33 and the second protrusions 34 in the fourth embodiment are not limited to those shown in the drawings. The axial length of the staple bands 2 and the number of staple bands 2 are also not limited to those shown in the drawings, and can be selected and adjusted as desired. In an alternative embodiment, only the first protrusions 33 can be provided, and the second protrusions 34 cannot be provided.

[0051] As shown in FIG. 17, a schematic diagram of the structure of a staple cartridge assembly according to a fifth embodiment of the present invention is shown. This embodiment is different from the fourth embodiment in that the first protrusion 33 is provided differently. The fifth embodiment also includes a plurality of staple bands 2, which are distributed on the support member 3 in the axial direction. The shape and installation form of the first protrusion 33 in the fifth embodiment are the same as those of the first embodiment, that is, the distance between the inner surface and the outer surface of the first protrusion 33 is smaller than the distance between the inner surface and the outer surface of the staple band body 21, and at least one mounting hole 212 is provided on the surface of the staple band body 21, and the first protrusion 33 is provided to pass through the mounting hole 212. The mounting hole 212 can be opened in two types. One is that the mounting hole 212 is completely opened in the staple band body 21 of one staple band 2. The other is that the staple band bodies 21 of two adjacent staple bands 2 each have a half hole, and after the two staple band bodies 21 are combined in the axial direction, the two half holes are combined to obtain an attachment hole 212.

[0052] This fifth embodiment may have many variations as well, all of which fall within the scope of protection of the present invention. The number, size, shape and arrangement of the first protrusions 33 and the second protrusions 34 in the fifth embodiment are not limited to those shown in the drawings. The length of the staple bands 2 along the axial direction and the number of staple bands 2 are also not limited to those illustrated in the drawings, and can be adjusted as needed. In another alternative embodiment, it is also possible to provide only the first protrusions 33 without providing the second protrusions 34.

[0053] In each of the above embodiments, the staple band 2 is a staple band 2 that satisfies the biocompatible material. In a preferred embodiment, the staple band body 21 and the staple for stapler 22 may be made of different materials. For example, in some embodiments, the staple band body 21 is made of a non-absorbable, non-degradable material such as titanium, titanium alloy, and stainless steel, and the staple for stapler 22 may be a staple for stapler made of a degradable material having biocompatibility, or a staple for stapler 22 that is biocompatible, biodegradable, and bioabsorbable, and does not require subsequent staple removal after the staple for stapler 22 is sutured to tissue. For example, the staple for stapler 22 is made of magnesium, magnesium alloy, degradable polymer material, etc., but the present invention is not limited thereto. Furthermore, a biocompatible, degradable, and bioabsorbable coating may be applied to the surface of the staple for stapler 22. Such a coating can further increase the hardness of the staple 22 and adjust the degradation rate of the staple 22. The coating can be, for example, a poly-L-lactic acid (PLLA) and / or poly-D,L-lactic acid (PDLLA) coating of absorbent material, but the present invention is not limited thereto. The overall degradation rate of the staple 22 can be adjusted by adjusting the thickness of the coating. Alternatively, the coating can be a drug having a coagulation effect, which can improve bleeding during anastomosis. In some other embodiments, the surface of the staple 22 can be provided with a magnetic coating, and when an external magnetic field is applied, the coating can be magnetized and have the effect of increasing the strength of the anastomosis. The external magnetic field can be an electromagnetic field, and the strength of the magnetic field can be adjusted according to the needs of the anastomosis, but can also be a permanent magnetic field.

[0054] The above describes the present invention in more detail in relation to specific preferred embodiments, and it cannot be concluded that the specific embodiments of the present invention are limited to these descriptions alone. For those skilled in the art to which the present invention pertains, many simple inferences or substitutions can be made without departing from the concept of the present invention, and all of these should be considered as belonging to the protection scope of the present invention.

Claims

1. 1. A staple cartridge assembly for use in a medical stapler, comprising: the staple cartridge assembly includes a staple band, a support member, a staple cartridge cover, and a firing block; the staple band comprises a staple band body extending in an axial direction of the stapler, the staple band body being attached to one side of the support member, the staple band body having a first surface remote from the support member; the staple cartridge cover at least partially covers a first surface of the staple band body, the staple cartridge cover having a second surface opposing the first surface of the staple band body, and a first gap between the first surface of the staple band body and the second surface of the staple cartridge cover; A staple cartridge assembly, characterized in that the firing block is movably disposed at a bottom of the staple cartridge cover and is movable along the axial direction, the firing block includes a staple cutting portion, and a height of a highest point of the staple cutting portion is higher than a height of a first surface of the staple band body.

2. The staple cartridge assembly of claim 1 , wherein a vertex of the staple-cutting portion of said firing block abuts a second surface of said staple cartridge cover.

3. The staple cartridge assembly of claim 1 , wherein a height of a lowest point of the staple cutting portion of said firing block is lower than a height of a first surface of said staple band body.

4. the staple band further comprises a staple for a stapler; The staple cartridge assembly of claim 1, wherein the staple for the stapler is rotatably connected to the staple band by a staple connecting portion, and the height of the highest point of the staple cutting portion of the firing block is higher than the height of the staple connecting portion.

5. At least one protrusion is further provided, 2. The staple cartridge assembly of claim 1, wherein the protrusion includes a first portion disposed between a first surface of the staple band body and a second surface of the staple cartridge cover, and a height of the first portion of the protrusion is equal to a height of the first gap.

6. The staple cartridge assembly of claim 5, wherein the protrusion is disposed on the support member or on the staple band body, and a surface of the protrusion away from the staple band body abuts against a second surface of the staple cartridge cover.

7. The staple cartridge assembly of claim 6, wherein a surface of said protrusion away from said staple band body is in parallel contact with a second surface of said staple cartridge cover.

8. 6. The staple cartridge assembly according to claim 5, characterized in that the surface of the support member is provided with at least one first protrusion, the height of the surface of the first protrusion away from the support member is higher than the height of the first surface of the staple band body, and the surface of the first protrusion away from the support member abuts against a second surface of the staple cartridge cover.

9. The staple cartridge assembly of claim 8, wherein a lateral distance between an inner surface and an outer surface of the first projection is smaller than a lateral distance between an inner surface and an outer surface of the staple band body, and at least one mounting hole is provided on a surface of the staple band body, and the first projection is disposed through the mounting hole.

10. The staple cartridge assembly of claim 9, wherein the first protrusion is a boss, and a projection of the boss on the first surface of the staple band body is a rectangle with rounded corners.

11. The staple cartridge assembly of claim 8, wherein the staple cartridge assembly includes a plurality of staple bands arranged along the axial direction, and the first protrusion is located between staple band bodies of two adjacent staple bands.

12. The staple cartridge assembly of claim 11, wherein said first protrusion is fixedly connected to said staple band body.

13. The staple cartridge assembly according to claim 5, characterized in that the surface of the support member is provided with at least one second protrusion, the second protrusion being located on the proximal end side and / or the distal end side of the support member, the height of the surface of the second protrusion away from the support member being higher than the height of the first surface of the staple band body, and the surface of the second protrusion away from the support member abuts against the second surface of the staple cartridge cover.

14. The staple cartridge assembly of claim 13, wherein said second protrusion is fixedly connected to said staple band body.

15. 14. The staple cartridge assembly of claim 13, further comprising at least one first protrusion disposed axially on a surface of said support member, said surface of said first protrusion being flush with a surface of said second ...

16. The staple cartridge assembly of claim 5, characterized in that at least one third protrusion is provided on a first surface of the staple band body, and a surface of the third protrusion away from the staple band body abuts against the second surface of the staple cartridge cover.

17. The staple cartridge assembly of claim 5, characterized in that the second surface of the staple cartridge cover is provided with a fourth protrusion protruding toward the staple band, and the surface of the fourth protrusion facing the staple band body abuts against the first surface of the staple band body.

18. The staple cartridge assembly of claim 17, wherein a surface of said fourth protrusion facing said staple band body is in close contact with and parallel to a first surface of said staple band body.

19. The staple cartridge assembly of claim 1, wherein the staple cartridge cover further comprises a third surface opposite the second surface, and a lower surface of the firing block abuts against the third surface of the staple cartridge cover.

20. The staple cartridge assembly of claim 4, wherein the staples for the stapler are biocompatible, degradable staples for the stapler and / or the staples for the stapler are biocompatible, bioabsorbable staples for the stapler.

21. The staple cartridge assembly according to claim 4, characterized in that the surface of the staple for the stapler is provided with a biocompatible degradable and bioabsorbable coating, and / or the surface of the staple for the stapler is provided with a magnetic coating, and the staple for the stapler is magnetized under the action of an external magnetic field.

22. 22. A staple cartridge assembly comprising: a staple cartridge assembly according to any one of claims 1 to 21; A medical stapler comprising:

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