Staple cartridge assembly and medical stapler

Abstract

The present application provides a kind of staple cartridge assembly and medical anastomat, the staple cartridge assembly includes: staple belt and support, the staple belt includes staple belt body, is installed to the side of the support, the staple belt body includes the first surface away from the support;Staple cartridge cover, the first surface of the staple belt body is at least partially covered the first surface of the staple belt body, the staple cartridge cover includes the second surface opposite the first surface of the staple belt body, there is first gap between the first surface of the staple belt body and the second surface of the staple cartridge cover;Firing block, movably set in the bottom of the staple cartridge cover, and can be moved along the axial direction of the anastomat, the firing block includes cutting nail part, the height of the highest point of the cutting nail part is higher than the height of the first surface of the staple belt body.The present application is by being arranged first gap between the first surface of the staple belt body and the second surface of the staple cartridge cover, so that the cutting nail part of firing block is higher than the first surface of the staple belt, facilitate cutting nail part drive anastomotic nail and separate from the staple belt.

Description

TECHNICAL FIELD

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

[0002] In the prior art, a medical anastomat 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 via a puncture device to access a surgical site for performing a 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 containing the staple belt and the support member, and a firing block is arranged on the proximal end side of the staple cartridge cover. During the firing of the anastomat, a knife rod pushes a cutting knife to move towards the distal end side, the cutting knife drives the firing block to move towards the distal end side of the anastomat, the firing block pushes the anastomotic staples rotatably connected to the staple belt body outward, and the cutting portion of the firing block drives the anastomotic staples to separate from the staple belt body, the cutting knife cuts the tissue between the staple cartridge assembly and the anvil, and the firing of the anastomat is achieved.

[0003] In the existing anastomat, the inner surface of the staple cartridge cover is in contact with the upper surface of the staple belt. The height of the cutting portion at the top end of the firing block can be lower than or equal to the height of the upper surface of the staple belt. When the firing block moves towards the distal end side, the cutting portion is not easy to drive the anastomotic staples to separate from the staple belt body, which can cause the anastomotic staples to fail to separate from the staple belt body.

[0004] In the present application, the distal end side and the proximal end side are relative to the operator, 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 site, is the distal end side. In the anastomat, the inner side and the outer side are relative to the axis of the anastomat, the side closer to the axis is the inner side, and the side farther from the axis is the outer side. SUMMARY

[0005] In view of the problems in the prior art, the present application aims to provide a staple cartridge assembly and a medical anastomat. A first gap is arranged between the first surface of the staple belt body and the second surface of the staple cartridge cover, so that the cutting portion of the firing block is higher than the first surface of the staple belt, facilitating the cutting portion to drive the anastomotic staples to separate from the staple belt.

[0006] The present application provides a staple cartridge assembly for a medical anastomat, which comprises:

[0007] a staple belt and a support member, the staple belt comprising a staple belt body extending along the axial direction of the anastomat, the staple belt body being mounted on one side of the support member, the staple belt body comprising a first surface facing away from the support member;

[0008] a cartridge cover at least partially covering a first surface of the staple belt body, the cartridge cover comprising a second surface opposite to the first surface of the staple belt body, wherein a first gap is formed between the first surface of the staple belt body and the second surface of the cartridge cover;

[0009] a firing block movably arranged at a bottom of the cartridge cover and movable along an axial direction of the stapler, the firing block comprising a staple cutting portion, wherein a highest point of the staple cutting portion is higher than a height of the first surface of the staple belt body.

[0010] In some embodiments, the highest point of the staple cutting portion of the firing block abuts against the second surface of the cartridge cover.

[0011] In some embodiments, a lowest point of the staple cutting portion of the firing block is lower than the height of the first surface of the staple belt body.

[0012] In some embodiments, the staple belt further comprises a staple, the staple being rotatably connected to the staple belt by a staple connecting portion, wherein the highest point of the staple cutting portion of the firing block is higher than a height of the staple connecting portion.

[0013] In some embodiments, at least one protrusion is further included, the protrusion being at least partially located between the first surface of the staple belt body and the second surface of the cartridge cover, and a height of the protrusion at a portion between the first surface of the staple belt body and the second surface of the cartridge cover is equal to a height of the first gap.

[0014] In some embodiments, the protrusion is located on the support or the staple belt body, and a side surface of the protrusion facing away from the staple belt body abuts against the second surface of the cartridge cover.

[0015] In some embodiments, the side surface of the protrusion facing away from the staple belt body is in parallel contact with the second surface of the cartridge cover.

[0016] In some embodiments, a surface of the support is provided with at least one first protrusion, a height of the side surface of the first protrusion facing away from the support is higher than the height of the first surface of the staple belt body, and the side surface of the first protrusion facing away from the support abuts against the second surface of the cartridge cover.

[0017] In some embodiments, a distance between an inner side surface and an outer side surface of the first protrusion is smaller than a distance between an inner side surface and an outer side surface of the staple belt body, a surface of the staple belt body is provided with at least one mounting hole, and the first protrusion is arranged in the mounting hole.

[0018] In some embodiments, the first protrusion is a boss, and a projection of the boss on the first surface of the staple strip body is a rounded rectangle.

[0019] In some embodiments, the staple cartridge assembly includes a plurality of staple strips arranged along an axial direction of the stapler, and the first protrusion is located between staple strip bodies of two adjacent staple strips.

[0020] In some embodiments, the first protrusion is fixedly connected to the staple strip body.

[0021] In some embodiments, a surface of the support member is provided with at least one second protrusion, the second protrusion is located on a proximal side and / or a distal side of the staple strip body, a height of the second protrusion away from a side surface of the support member is higher than a height of the first surface of the staple strip body, and the second protrusion away from the side surface of the support member abuts against the second surface of the staple strip body.

[0022] In some embodiments, the second protrusion is fixedly connected to the staple strip body.

[0023] In some embodiments, a surface of the support member is provided with two second protrusions, the two second protrusions are respectively located on a proximal side and a distal side of the staple strip body.

[0024] The surface of the support member is further provided with at least one first protrusion, the first protrusion is located between the two second protrusions, and a height of the first protrusion away from the side surface of the support member is the same as a height of the second protrusion away from the side surface of the support member.

[0025] In some embodiments, the first surface of the staple strip body is provided with at least one third protrusion, and a side surface of the third protrusion away from the staple strip body abuts against the second surface of the cartridge cover.

[0026] In some embodiments, the second surface of the cartridge cover is provided with a fourth protrusion protruding towards the staple strip, and a side surface of the fourth protrusion away from the staple strip body abuts against the first surface of the staple strip body.

[0027] In some embodiments, the side surface of the fourth protrusion away from the staple strip body is parallelly fitted to the first surface of the staple strip body.

[0028] In some embodiments, the cartridge cover further includes a third surface opposite to the second surface, and a lower surface of the firing block abuts against the third surface of the cartridge cover.

[0029] In some embodiments, the anastomosis staples are biocompatible and degradable; and / or, the anastomosis staples are biocompatible and bioabsorbable.

[0030] In some embodiments, the anastomosis staples are provided with a biocompatible and degradable and bioabsorbable coating; and / or, the anastomosis staples are provided with a magnetic coating, and under the action of an external magnetic field, the anastomosis staples are magnetized.

[0031] The embodiment of the present application also provides a medical anastomat comprising the above-mentioned staple cartridge assembly.

[0032] The staple cartridge assembly and the medical anastomat provided by the present application have the following advantages:

[0033] The present application provides a staple cartridge assembly for a medical anastomat, by arranging a first gap between the first surface of the staple belt body and the second surface of the staple cartridge cover, so that the height of the highest point of the cutting staple part of the firing block is higher than the first surface of the staple belt, facilitating the cutting staple part of the firing block to drive the anastomosis staples to separate from the staple belt, so as to ensure that the firing block can push the anastomosis staples out of the anvil and close on the tissue when the anastomat is fired. BRIEF DESCRIPTION OF DRAWINGS

[0034] Other features, objects, and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments thereof, read in conjunction with the accompanying drawings.

[0035] Figure 1 is a structure diagram of the staple cartridge assembly of the first embodiment of the present application;

[0036] Figure 2 is a front view of the staple cartridge assembly of the first embodiment of the present application;

[0037] Figure 3 is an exploded view of the staple cartridge assembly of the first embodiment of the present application;

[0038] Figure 4 is a top view of the staple cartridge assembly of the first embodiment of the present application;

[0039] Figure 5 is Figure 4 a sectional view in the direction of A1-A1 in FIG.

[0040] Figure 6 is Figure 4 a sectional view in the direction of A2-A2 in FIG.

[0041] Figure 7 is a left view of the staple cartridge assembly of the first embodiment of the present application;

[0042] Figure 8FIG. 11 is a partial schematic view of a staple cartridge assembly of the first embodiment of the present application omitting the staple cartridge cover;

[0043] Figure 9 FIG. 12 is a partial schematic view of a staple cartridge assembly of the second embodiment of the present application omitting the staple cartridge cover;

[0044] Figure 10 FIG. 13 is a schematic view of a staple belt and the staple cartridge cover of the second embodiment of the present application;

[0045] Figure 11 FIG. 14 is a schematic view of a staple cartridge cover of the third embodiment of the present application;

[0046] Figure 12 FIG. 15 is a partial schematic view of a staple cartridge assembly of the third embodiment of the present application omitting the staple cartridge cover;

[0047] Figure 13 FIG. 16 is a schematic view of a staple cartridge assembly of the fourth embodiment of the present application omitting the staple cartridge cover;

[0048] Figure 14 FIG. 17 is a schematic view of a staple belt of the fourth embodiment of the present application;

[0049] Figure 15 FIG. 18 is a schematic view of a support member of the fourth embodiment of the present application;

[0050] Figure 16 FIG. 19 is a partial schematic view of a staple cartridge assembly of the fourth embodiment of the present application omitting the staple cartridge cover;

[0051] Figure 17 FIG. 20 is a schematic view of a staple belt and a support member of the fifth embodiment of the present application.

[0052] REFERENCE NUMERALS:

[0053] 1 staple cartridge cover 22 staple

[0054] 11 distal side of staple cartridge cover 221 staple connecting portion

[0055] 12 proximal side of staple cartridge cover 3 support member

[0056] 13 second surface 31 distal side of support member

[0057] 14 staple hole 32 proximal side of support member

[0058] 15 fourth surface 33 first protruding portion

[0059] 16 third surface 34 second protruding portion

[0060] 17 fourth protruding portion 4 firing block

[0061] 2 staple belt 41 staple cutting portion

[0062] 21 band body 42 pusher

[0063] 211 first surface 5 fixing member

[0064] 212 mounting hole 6 first gap

[0065] 213 third protruding part DETAILED DESCRIPTION

[0066] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, the example embodiments can 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 the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and descriptions of the same elements will be omitted from descriptions of subsequent figures.

[0067] The present application provides a staple cartridge assembly and a medical anastomat comprising the same. The medical anastomat comprises a device platform, a firing handle movably connected to the device platform, and a staple head mounted on the device platform, wherein the staple head comprises oppositely arranged staple cartridge assembly and anvil. The staple cartridge assembly comprises: a staple band and a support, wherein the staple band comprises a staple band body extending along the axial direction of the anastomat, the staple band body is mounted on one side of the support, and the staple band body comprises a first surface facing away from the support; a staple cartridge cover, wherein the staple cartridge cover at least partially covers the first surface of the staple band body, the staple cartridge cover comprises a second surface opposite to the first surface of the staple band body, and there is a first gap between the first surface of the staple band body and the second surface of the staple cartridge cover; and a firing block movably arranged at the bottom of the staple cartridge cover, wherein in the initial state, the firing block is located at the proximal end side of the staple cartridge cover and can move along the axial direction of the anastomat, and the firing block comprises a cutting portion, wherein the height of the highest point of the cutting portion is higher than the height of the first surface of the staple band body, and the cutting portion is used to drive the anastomat staple to separate from the staple band body during the firing of the anastomat.

[0068] Therefore, by arranging the first gap between the first surface of the staple band body and the second surface of the staple cartridge cover, the height of the highest point of the cutting portion of the firing block is higher than the first surface of the staple band, which facilitates the cutting portion of the firing block to drive the anastomat staple to separate from the staple band, so that the firing block can push the anastomat staple out to the anvil to be closed on the tissue during the firing of the anastomat.

[0069] The structure of the staple cartridge assembly of each specific embodiment will be described in detail below with reference to the accompanying drawings. It should be understood that each specific embodiment is not a limitation on the protection scope of the present application.

[0070] Figures 1-8The structure of the staple cartridge assembly of the first embodiment of the present application is shown. As shown in the figure Figures 1-3 The staple cartridge assembly comprises a staple belt 2, a support 3 for supporting the staple belt 2, a staple cartridge cover 1 containing the support 3 and the staple belt 2, and a firing block 4 at least partially into the staple cartridge cover 1. The staple belt 2 comprises a staple belt body 21 extending in the axial direction of the stapler and anastomosis staples 22 connected to the staple belt body 21, the anastomosis staples 22 being rotatably connected to the staple belt body 21 through a staple connecting portion 221. The staple cartridge assembly further comprises a fixing member 5, the distal end side 31 of the support 3 and the distal end side 11 of the staple cartridge cover 1 are both fixed to the fixing member 5. In this embodiment, two supports 3, two staple belts 2 and two staple cartridge covers 1 are provided, the staple belts 3 are respectively arranged on the corresponding supports 3, and the anastomosis staples 22 are arranged on both sides of the staple belt 3, and the staple cartridge cover 1 is sleeved outside the support 3 and the staple belt 3. In other alternative embodiments, the number of supports 3, staple belts 2 and staple cartridge covers 1 can be changed as needed, and the staple belt 2 can only have anastomosis staples 22 on one side, all of which are within the protection scope of the present application. Figure 3 Only part of the anastomosis staples 22 is shown in the figure, and in actual application, the number and arrangement of the anastomosis staples 22 can be selected as needed.

[0071] The staple belt body 21 is installed on one side of the support 3, and Figure 3 and Figure 5 from the perspective of the figure, that is, the staple belt body 21 is arranged on the upper side of the support 3, the staple belt body 21 comprises a first surface 211 facing away from the support 3, that is, the upper surface of the staple belt body 21 is the first surface 211. As shown in the figure Figures 3-5 The staple cartridge cover 1 at least partially covers the first surface 211 of the staple belt body 21, and the staple cartridge cover 1 comprises a second surface 13 opposite to the first surface 211 of the staple belt body 21. The second surface 13 of the staple cartridge cover 1 is the surface opposite to the staple belt body 21, and in this embodiment, the second surface 13 of the staple cartridge cover 1 is the inner surface of the upper side plate of the staple cartridge cover. The staple cartridge cover 1 further comprises a fourth surface 15 outside the second surface 13, that is, the outer surface of the upper side plate of the staple cartridge cover 1. The upper side plate of the staple cartridge cover 1 is provided with a through staple hole 14.

[0072] In the present application, the distal end side and the proximal end side are relative to the operator, the end closer to the operator is the proximal end side, the end farther away from the operator, that is, 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, that is, 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 figure Figure 1From the perspective of the staple cartridge cover 1, its distal side 11 is the right side, and its proximal side 12 is the left side. Figure 15 From the perspective of the support member 3, its distal side 31 is the right side, and its proximal side 32 is the left side. In this invention, the S1 direction is the direction from the proximal side to the distal side of the stapler, and the S1 direction or the direction opposite to the S1 direction is defined as the axial direction of the stapler. Figures 5-7 The S2 direction shown is the height direction. In this invention, for a component, the inner and outer sides are relative to the axis of the anastomosis device; the side closer to the axis is the inner side, and the side farther from the axis is the outer side.

[0073] like Figures 3-5 As shown, there is a first gap 6 between the first surface 211 of the staple body 21 and the second surface 13 of the staple cartridge cover 1, and the height of the first gap 6 is h1. The height h1 of this first gap 6 can vary depending on the size of the staple cartridge assembly. The firing block 4 is initially located on the proximal side 12 of the staple cartridge cover 1 and can move axially along the stapler. Figure 7 and Figure 8 As shown, the firing block 4 includes a cutting section 41 and a pushing section 42, with the pushing section 42 located at the distal end of the cutting section 41. When the stapler is fired, the pushing section 42 first contacts the staple 22, pushing it to rotate and close, causing the staple foot of the staple 22 to extend outward from the staple hole 14 of the staple cartridge cover 1. Then, the cutting section 41 contacts the staple connection portion 221 and cuts the staple, causing the staple connection portion 221 to disconnect, separating the staple 22 from the staple body 21. The staple 22 can then be pushed out entirely from the staple hole 14 of the staple cartridge cover 1 and abut against the tissue. Figure 8 As shown, the height P1 of the highest point of the cutting part 41 is higher than the height P2 of the first surface 211 of the staple body 21, which facilitates the cutting part 41 of the firing block 4 to drive the staple 22 to separate from the staple 2, thereby ensuring that when the stapler is fired, the firing block 4 can push the staple 22 toward the anvil and close it on the tissue.

[0074] like Figure 7As shown, in this embodiment, the highest point of the cutting portion 41 of the firing block 4 abuts against the second surface 13 of the cartridge cover 1, and the cutting portion 41 of the firing block 4 can make the best use of the first gap 6, and better drive the anastomosis needle 22 to separate from the staple band 2. The cartridge cover 1 further comprises a third surface 16 opposite to the second surface 13, and the lower surface of the firing block 4 abuts against the third surface 16 of the cartridge cover 1. In this embodiment, the third surface 16 of the cartridge cover 1 is the upper surface of the lower side plate of the cartridge cover 1. The third surface 16 and the second surface 13 of the cartridge cover 1 keep the firing block 4 in a stable position in the height direction. When the firing block 4 moves in the axial direction of the anastomat in the cartridge cover 1, the height of the highest point of the cutting portion 41 of the firing block 4 is kept higher than the height of the first surface 211 of the staple band body 21, and all the anastomosis needles 22 can be normally separated from the staple band body 21.

[0075] As shown, Figure 8 In this embodiment, the lowest point of the cutting portion 41 of the firing block 4 has a height P3 lower than the height P2 of the first surface 211 of the staple band body 21. The highest point of the cutting portion 41 of the firing block 4 has a height P1 higher than the height of the staple connecting portion 221. Therefore, the cutting portion 41 of the firing block 4 is at least partially aligned with the staple connecting portion 221 in the axial direction of the anastomat, and it can be ensured that the anastomosis needles 22 are completely separated from the staple band body 21 and anastomosed to the tissue when the anastomat is fired.

[0076] As shown, Figures 3-8 In this embodiment, the surface of the support 3 is provided with at least one first protruding portion 33, the height of the side surface (in this embodiment, the upper surface of the first protruding portion 33) of the first protruding portion 33 away from the support 3 is higher than the height of the first surface 211 of the staple band body 21, and the side surface of the first protruding portion 33 away from the support 3 abuts against the second surface 13 of the cartridge cover 1. The abutting action of the first protruding portion 33 makes the first gap 6 between the first surface 211 of the staple band body 21 and the second surface 13 of the cartridge cover 1. The height of the portion of the first protruding portion 33 between the second surface 13 of the cartridge cover 1 and the first surface 211 of the staple band body 21 is the height of the portion of the first protruding portion 33 protruding from the first surface 211 of the staple band body 21, and the height is equal to the height h1 of the first gap 6.

[0077] As shown, Figure 3 and Figure 6As shown, in this embodiment, the side surface of the first protruding part 33 away from the staple belt body 21 is parallel to the second surface 13 of the staple cartridge cover 1 and abuts against each other, so as to enhance the stability of the cooperation between the first protruding part 33 and the staple belt body 21. Figure 3 and Figure 8 As shown, the distance between the inner side surface and the outer side surface of the first protruding part 33 is less than the distance between the inner side surface and the outer side surface of the staple belt body 21, that is, the lateral width of the first protruding part 33 is less than the lateral width of the staple belt body 21, and the surface of the staple belt body 21 is provided with at least one mounting hole 212, and the first protruding part 33 is arranged in the mounting hole 212. Preferably, the first protruding part 33 and the mounting hole 212 are fixedly connected by welding.

[0078] As shown, Figure 8 In this embodiment, the first protruding part 33 is a boss, and the projection of the boss on the first surface 211 of the staple belt body 21 is a rounded rectangle, that is, each corner of the boss is provided with a circular arc guide surface, which can better guide the boss into the mounting hole 212 when the staple belt 2 is assembled with the support 3. The shape of the first protruding part 33 here is only an example, and in other alternative embodiments, the first protruding part 33 can also adopt other shapes, for example, the projection of the first protruding part 33 on the first surface 211 of the staple belt body 21 is a rectangle, or a triangle, a rhombus, a trapezoid, etc., and the area of the upper surface of the first protruding part 33 can also be different from the area of the lower surface, for example, the first protruding part 33 is a cone structure with a large lower surface area and a small upper surface area, which all belong to the protection scope of the present application. The number of the first protruding part 33 and the mounting hole 212 can be one-to-one correspondence, or the mounting hole 212 can be more than the first protruding part 33.

[0079] In this embodiment, the surface of the support 3 is also provided with two second protruding parts 34, which are located on the proximal end side and the distal end side of the staple belt body 21, and the height of the side surface of the second protruding part 34 away from the support 3 is higher than the height of the first surface 211 of the staple belt body 21, and the side surface of the second protruding part 34 away from the support 3 abuts against the second surface 13 of the staple belt body 21. The height of the side surface of the first protruding part 33 away from the support 3 is the same as the height of the side surface of the second protruding part 34 away from the support 3. In this embodiment, the distance between the inner side surface and the outer side surface of the second protruding part 34 is equal to the distance between the inner side surface and the outer side surface of the staple belt body 21. Preferably, the second protruding part 34 can be fixedly connected with the staple belt body 21 by welding.

[0080] In this embodiment, the number and arrangement of the first protrusions 33 can be selected as required, and can be uniformly or non-uniformly distributed on the surface of the support 3 along the axial direction of the anastomat; in another alternative embodiment, only the first protrusions 33 can be provided on the surface of the support 3, and the second protrusions 34 can not be provided; in still another alternative embodiment, only the second protrusions 34 can be provided on the surface of the support 3, and the first protrusions 33 can not be provided; in still another alternative embodiment, the second protrusions 34 can be provided only on the distal end side or only on the proximal end side; in still another alternative embodiment, the second protrusions 34 can also have the same shape and size as the first protrusions 33.

[0081] Figure 9 and Figure 10 The structure of the staple cartridge assembly of the second embodiment of the present application is shown. The difference between this embodiment and the first embodiment is that the surface of the support 3 is not provided with the first protrusions 33 and the second protrusions 34, and the first surface 211 of the staple belt body 21 is provided with at least one third protrusion 213, the side surface of the third protrusion 213 away from the staple belt body 21 abuts against the second surface 13 of the cartridge cover 1, so as to form a first gap 6 between the first surface 211 of the staple belt body 21 and the second surface 13 of the cartridge cover 1. The height of the third protrusion 213 is equal to the height h1 of the first gap 6. In this embodiment, the side surface of the third protrusion 213 away from the staple belt body 21 is the upper surface of the third protrusion 213, and the upper surface of the third protrusion 213 is parallel to and abuts against the second surface 13 of the cartridge cover 1, so as to improve the fitting stability. The shape, size, number and arrangement of the third protrusions 213 can be selected and set as required, and are not limited to those shown in the drawings. The purpose of facilitating the driving of the cutting portion 41 of the firing block 4 to separate the anastomat staples 22 from the staple belt 2 can also be achieved by using this embodiment.

[0082] Figure 11 and Figure 12The structure of the staple cartridge assembly of the third embodiment of the present application is shown. The difference between this embodiment and the first embodiment is that the surface of the support 3 is not provided with the first protruding part 33 and the second protruding part 34, and the second surface 13 of the cartridge cover 1 is provided with a fourth protruding part 17 protruding towards the staple belt 2, and the fourth protruding part 17 abuts against the first surface 211 of the staple belt body 21. The height of the fourth protruding part 17 is equal to the height h1 of the first gap 6. In this embodiment, the side surface of the staple belt body 21 towards which the fourth protruding part 17 protrudes is the lower surface of the fourth protruding part 17, and the lower surface of the fourth protruding part 17 is parallel to the first surface 211 of the staple belt body 21 and abuts against each other to improve the fitting stability. The shape, size, number and arrangement of the fourth protruding part 17 can be selected and set as required, and is not limited to that shown in the figure. This embodiment can also achieve the purpose of facilitating the driving of the cutting part 41 of the firing block 4 to separate the anastomosis staple 22 from the staple belt 2.

[0083] The protruding parts in the above-mentioned first, second and third embodiments are respectively arranged on the support 3, the staple belt body 21 and the cartridge cover 1 to achieve the first gap 6 between the first surface 211 of the staple belt body 21 and the second surface 13 of the cartridge cover 1. In other alternative embodiments, the above-mentioned three embodiments can be combined for use, for example, two or more of the first protruding part 33, the second protruding part 34, the third protruding part 213 and the fourth protruding part 17 are arranged at the same time, all of which belong to the protection scope of the present application.

[0084] Figures 13-16 The structure of the staple cartridge assembly of the fourth embodiment of the present application is shown. This embodiment is similar to the first embodiment, and the surface of the support 3 is provided with the first protruding part 33 and two second protruding parts 34. The two second protruding parts 34 are located at the distal end side 31 and the proximal end side 32 of the support 3, and the first protruding part 33 is located between the two second protruding parts 34, and the upper surfaces of the first protruding part 33 and the second protruding part 34 abut against the second surface 13 of the cartridge cover 1. The difference between the fourth embodiment and the first embodiment is that in this embodiment, the staple cartridge assembly comprises a plurality of staple belts 2, the plurality of staple belts 2 are arranged along the axial direction of the anastomat, and the first protruding part 33 is located between the staple belt bodies 21 of two adjacent staple belts 2. The two second protruding parts 34 are respectively located at the distal end side of the most distal staple belt 2 and the proximal end side of the nearest staple belt 2. In this embodiment, the first protruding part 33 is preferably fixedly connected with the staple belt body 21. For example, the first protruding part 33 and the second protruding part 34 are respectively fixedly connected with the staple belt body 21 by welding or the like.

[0085] As Figures 13-15As shown, in this embodiment, the distance between the inner and outer sides of the first protrusion 33 is equal to the distance between the inner and outer sides of the staple body 21, that is, the lateral width of the first protrusion 33 is equal to the lateral width of the staple body 21. This allows for better positioning of the installation of multiple staples 2 and better maintenance of the stability of the staples 2. In other alternative embodiments, the distance between the inner and outer sides of the first protrusion 33 can also be smaller than the distance between the inner and outer sides of the staple body 21. For example, the shape and size of the first protrusion 33 as in the first embodiment can be used, which also falls within the scope of protection of this invention.

[0086] This fourth embodiment can also have many variations, all of which fall within the protection scope of this invention. The number, size, shape, and arrangement of the first protrusion 33 and the second protrusion 34 in the fourth embodiment are not limited to those shown in the figures. The length of the staples 2 along the axial direction of the stapler and the number of staples 2 are also not limited to those shown in the figures and can be adjusted as needed. In an alternative embodiment, only the first protrusion 33 may be provided, without the second protrusion 34.

[0087] like Figure 17 The diagram shows a schematic of the staple cartridge assembly according to the fifth embodiment of the present invention. This embodiment differs from the fourth embodiment in the arrangement of the first protrusion 33. The fifth embodiment also includes multiple staples 2, which are distributed along the axial direction of the stapler on the support member 3. The shape and arrangement of the first protrusion 33 in the fifth embodiment are similar to those in the first embodiment; that is, the distance between the inner and outer sides of the first protrusion 33 is less than the distance between the inner and outer sides of the staple body 21. The surface of the staple body 21 has at least one mounting hole 212, and the first protrusion 33 passes through the mounting hole 212. The mounting hole 212 can be opened in two ways. One is that the mounting hole 212 is completely opened on the staple body 21 of one staple 2. The other is that the staple bodies 21 of two adjacent staples 2 can each have a half-hole, and after the two staple bodies 21 are combined along the axial direction of the stapler, the two half-holes combine to form a mounting hole 212.

[0088] This fifth embodiment can also have many variations, all of which fall within the protection scope of this invention. The number, size, shape, and arrangement of the first protrusion 33 and the second protrusion 34 in the fifth embodiment are not limited to those shown in the figures. The length of the staples 2 along the axial direction of the stapler and the number of staples 2 are also not limited to those shown in the figures and can be adjusted as needed. In an alternative embodiment, only the first protrusion 33 may be provided, without the second protrusion 34.

[0089] In the above various embodiments, the staple belt 2 is a staple belt 2 made of a biocompatible material. In preferred embodiments, the staple belt body 21 and the staples 22 can be made of different materials. For example, in some embodiments, the staple belt body 21 is made of a non-absorbable and non-degradable material such as titanium, titanium alloy, stainless steel, etc., and the staples 22 can be biocompatible, degradable staples or biocompatible, degradable and absorbable staples. After the staples 22 are sutured to the tissue, no subsequent staple removal operation is needed. For example, the staples 22 can be made of magnesium, magnesium alloy, degradable polymer material, etc., but the present application is not limited thereto. Further, the surface of the staples 22 can be coated with a biocompatible, degradable and absorbable coating. The coating can further increase the hardness of the staples 22 and can adjust the degradation rate of the staples 22. The coating can be, for example, absorbable material PLLA (poly-L-lactide) and / or PDLLA (poly-DL-lactide) coating, etc., but the present application is not limited thereto. By adjusting the thickness of the coating, the overall degradation rate of the staples 22 can be adjusted. Alternatively, the coating can be a blood clotting agent, etc., which can improve bleeding during anastomosis. In some other embodiments, the surface of the staples 22 can be provided with a magnetic coating. When an external magnetic field is applied, the coating is magnetized, which can achieve the effect of strengthening the anastomosis strength. The external magnetic field can be an electromagnetic field, and the magnetic field strength can be adjusted to meet the needs of anastomosis; or it can be a permanent magnetic field.

[0090] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application should not be limited to these descriptions. For those of ordinary skill in the art to which the present application belongs, without departing from the concept of the present application, a number of simple deductions or substitutions can be made, which should be considered as falling within the scope of protection of the present application.

Claims

1. A staple cartridge assembly, characterized in that, For a medical stapler, the staple cartridge assembly comprises: a staple belt and a support, the staple belt comprising staples and a staple belt body extending in an axial direction of the stapler, the staples being rotatably connected to the staple belt body by staple connecting portions, the staple belt body being mounted to one side of the support, the staple belt body comprising a first surface facing away from the support; a staple cartridge cover at least partially covering the first surface of the staple belt body, the staple cartridge cover comprising a second surface opposite to the first surface of the staple belt body, there being a first gap between the first surface of the staple belt body and the second surface of the staple cartridge cover; a firing block movably arranged at a bottom of the staple cartridge cover and movable in the axial direction of the stapler, the firing block comprising a staple cutting portion, a highest point of the staple cutting portion being higher than a height of the first surface of the staple belt body, the staple cutting portion being in contact with the staple connecting portions to separate the staples from the staple belt body when the stapler is fired.

2. The staple cartridge assembly of Claim 1, wherein, The highest point of the staple cutting portion of the firing block abuts against the second surface of the staple cartridge cover.

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

4. The cartridge assembly of Claim 3, wherein, The highest point of the staple cutting portion of the firing block is higher than the height of the staple connecting portions.

5. The cartridge assembly of Claim 1, wherein, Further comprising at least one protrusion, the protrusion being at least partially located between the first surface of the staple belt body and the second surface of the staple cartridge cover, and a height of the protrusion located between the first surface of the staple belt body and the second surface of the staple cartridge cover being equal to a height of the first gap.

6. The cartridge assembly of Claim 5, wherein, The protrusion is located on the support or the staple belt body, a side surface of the protrusion facing away from the staple belt body abutting against the second surface of the staple cartridge cover.

7. The cartridge assembly of Claim 6, wherein, The side surface of the protrusion facing away from the staple belt body is in parallel contact with the second surface of the staple cartridge cover.

8. The cartridge assembly of Claim 5, wherein, The surface of the support is provided with at least one first protrusion, a height of a side surface of the first protrusion facing away from the support being higher than the height of the first surface of the staple belt body, the side surface of the first protrusion facing away from the support abutting against the second surface of the staple cartridge cover.

9. The cartridge assembly of Claim 8, wherein, A distance between an inner side surface and an outer side surface of the first protrusion is smaller than a distance between an inner side surface and an outer side surface of the staple belt body, the surface of the staple belt body is provided with at least one mounting hole, the first protrusion being arranged in the mounting hole.

10. The cartridge assembly of Claim 9, wherein, The first protrusion is a boss, a projection of the boss on the first surface of the staple belt body is a rounded rectangle.

11. The cartridge assembly of Claim 8, wherein, The staple cartridge assembly comprises a plurality of staple belts arranged in the axial direction of the stapler, the first protrusion being located between staple belt bodies of two adjacent staple belts.

12. The cartridge assembly of Claim 11, wherein, The first protrusion is fixedly connected with the staple belt body.

13. The cartridge assembly of Claim 5, wherein, The surface of the support is provided with at least one second protrusion, the second protrusion being located at a proximal side and / or a distal side of the staple belt body, a height of a side surface of the second protrusion facing away from the support being higher than the height of the first surface of the staple belt body, the side surface of the second protrusion facing away from the support abutting against the second surface of the staple cartridge cover.

14. The cartridge assembly of Claim 13, wherein, The second protruding part is fixedly connected with the staple belt body.

15. The cartridge assembly of Claim 13, wherein, The surface of the support part is provided with two second protruding parts, and the two second protruding parts are respectively located on the proximal end side and the distal end side of the staple belt body. The surface of the support part is further provided with at least one first protruding part, the first protruding part is located between the two second protruding parts, and the side surface of the first protruding part away from the support part is the same in height as the side surface of the second protruding part away from the support part.

16. The cartridge assembly of claim 5, wherein, The first surface of the staple belt body is provided with at least one third protruding part, and the side surface of the third protruding part away from the staple belt body abuts against the second surface of the cartridge cover.

17. The cartridge assembly of Claim 5, wherein, The second surface of the cartridge cover is provided with a fourth protruding part protruding towards the staple belt, and the side surface of the fourth protruding part away from the staple belt abuts against the first surface of the staple belt body.

18. The cartridge assembly of claim 17, wherein, The side surface of the fourth protruding part away from the staple belt body is parallelly fitted with the first surface of the staple belt body.

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

20. The cartridge assembly of Claim 4, wherein, The anastomosis staple is a biocompatible degradable anastomosis staple; and / or, the anastomosis staple is a biocompatible bioabsorbable anastomosis staple.

21. The cartridge assembly of Claim 4, wherein, The surface of the anastomosis staple is provided with a biocompatible degradable and bioabsorbable coating; and / or, the surface of the anastomosis staple is provided with a magnetic coating, and under the action of an external magnetic field, the anastomosis staple is magnetized.

22. A surgical stapler comprising: The cartridge assembly comprises the staple cartridge assembly according to any one of claims 1 to 21. The cartridge assembly comprises the staple cartridge assembly according to any one of claims 1 to 21.

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