Nail cartridge assembly and medical stapler

Abstract

The present invention provides a stapler assembly and a medical stapler. The stapler assembly comprises: a staple band comprising at least one staple band body and a plurality of staples, the staples being rotatably connected to the staple band body via staple connection portions; and a stapler cover sleeved over the stapler band body. The stapler cover comprises a bent portion extending axially along the stapler, the bent portion being provided with a plurality of staple holes, each of which comprises a first hole wall and a second hole wall extending axially along the stapler, the first hole wall being higher than the second hole wall. In the present invention, the staple holes are provided in the bent portion of the stapler cover, the second hole wall being lower than the first hole wall, and the height of the staple holes being lowered, thereby making it easier for the staples to be separated from the stapler cover after closure.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a staple cartridge assembly and a medical stapler. Background Art

[0002] In the prior art, a medical stapler generally includes an instrument platform, a firing handle movably connected to the instrument platform, and a staple head mounted on the instrument platform. The staple head can be passed through a small incision on the body by a puncture device to access the surgical site for surgery. The staple head includes a staple magazine assembly and an anvil disposed opposite each other. The staple magazine assembly includes a staple band, a support member supporting the staple band, and a staple magazine cover that accommodates the staple band and the support member. A firing block is provided on the proximal side of the staple magazine cover. When the stapler is fired, the cutter is pushed toward the distal side by the pusher rod. The cutter drives the firing block toward the distal side of the stapler. The firing block pushes out the staples rotatably connected to the staple band body, and the staple cutting portion of the firing block drives the staples to separate from the staple band body. The cutter cuts the tissue between the staple magazine assembly and the anvil, thereby firing the stapler.

[0003] In the existing staple cartridge assembly, the upper plate of the staple cartridge cover is formed with staple holes corresponding to the staples. However, due to the high height of the upper plate of the staple cartridge cover, after the staples are closed, they may not be able to be completely detached from the staple cartridge cover, affecting the surgical effect.

[0004] In the present invention, the terms "distal" and "proximal" are relative to the operator. The end closer to the operator is the proximal side, and the end farther from the operator, i.e., closer to the surgical site, is the distal side. In a stapler, "inside" and "outside" are relative to the stapler's axis. The side closer to the axis is the inner side, and the side farther from the axis is the outer side. Summary of the Invention

[0005] In view of the problems in the prior art, the object of the present invention is to provide a staple cartridge assembly and a medical stapler, which make it easier for staples to be separated from the staple cartridge cover after closing.

[0006] An embodiment of the present invention provides a staple cartridge assembly, comprising:

[0007] A staple band comprises at least one staple band body and a plurality of staples, wherein the staples are rotatably connected to the staple band body via staple connecting portions;

[0008] The staple cartridge cover is sleeved on the outside of the stapler body, and the staple cartridge cover includes a bent portion extending along the axial direction of the stapler, and the bent portion is provided with a plurality of staple holes, and the staple holes include a first hole wall and a second hole wall extending along the axial direction of the stapler, and the height of the first hole wall is higher than the height of the second hole wall.

[0009] In some embodiments, the bending portion is connected between the upper plate and a side plate of the nail magazine cover, and the nail hole includes a first section and a second section that are connected. The first section of the nail hole is opened on the upper plate of the nail magazine cover, and the second section of the nail hole is opened on the side plate of the nail magazine cover. The first section of the nail hole has the first hole wall on the side away from the second section, and the second section of the nail hole has the second hole wall on the side away from the first section.

[0010] In some embodiments, the first hole wall is parallel to the side plate of the nail magazine cover, and the second hole wall is parallel to the upper plate of the nail magazine cover.

[0011] In some embodiments, the height of the highest point of the nail connecting portion is lower than the height of the highest point of the first hole wall of the nail hole.

[0012] In some embodiments, the height of the lowest point of the nail connecting portion is lower than the height of the highest point of the second hole wall of the nail hole.

[0013] In some embodiments, the projection of the nail connecting portion on the side plate of the nail magazine cover at least partially overlaps with the projection of the nail hole on the side plate of the nail magazine cover.

[0014] In some embodiments, a distance between the first hole wall and the second hole wall of the staple hole in the lateral direction is greater than a distance between two sides of the staple in the lateral direction.

[0015] In some embodiments, the projection of the staples on the upper plate of the staple cartridge cover falls within the coverage range of the projection of the staple holes on the upper plate of the staple cartridge cover.

[0016] In some embodiments, a concave arc is provided at the distal end and the proximal end of the second hole wall, and the lowest point of the concave arc is lower than the height of the second hole wall.

[0017] In some embodiments, the nail magazine cover includes two bent portions located on both sides of the nail strip, and the two bent portions are respectively provided with a plurality of nail holes.

[0018] In some embodiments, the surface of the bent portion is a smooth arc surface.

[0019] In some embodiments, a support member is further included. During the rotation of the staples, the side walls of the staples are at least partially pressed against the support member and the inner wall of the side plate of the staple cartridge cover at the same time.

[0020] In some embodiments, the staple further includes a crown portion connected to the staple connecting portion. After the staple is closed and formed, the crown portion rotates to an axial direction, and the second hole wall is higher than the lowest point of the crown portion.

[0021] In some embodiments, the nail crown is provided with barbs, and in the initial rotation state, the second hole wall is higher than the barbs.

[0022] In some embodiments, a firing block is further included, wherein the nail belt body is mounted on one side of the support member, and the nail belt body includes a first surface facing away from the support member;

[0023] The cartridge cover includes a second surface opposite to the first surface of the staple tape body, and a first gap is formed between the first surface of the staple tape body and the second surface of the cartridge cover;

[0024] The firing block is movably arranged at the bottom of the stapler cover and can move along the axial direction of the stapler. The firing block includes a staple cutting portion, and 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.

[0025] In some embodiments, the lowest point of the nail cutting portion of the firing block is lower than the height of the first surface of the nail band body, and the nail cutting portion of the firing block is at least partially aligned with the nail connecting portion in the axial direction of the stapler.

[0026] In some embodiments, at least one raised portion is further included, wherein the raised portion is at least partially located between the first surface of the nail band body and the second surface of the nail magazine cover, and the height of the portion of the raised portion located between the first surface of the nail band body and the second surface of the nail magazine cover is equal to the height of the first gap.

[0027] In some embodiments, at least one first protrusion is provided on the surface of the support member, and the height of the side surface of the first protrusion facing away from the support member is higher than the height of the first surface of the nail band body, and the side surface of the first protrusion facing away from the support member is abutted against the second surface of the nail magazine cover.

[0028] In some embodiments, the distance between the inner side and the outer side of the first protrusion is smaller than the distance between the inner side and the outer side of the nail belt body. The surface of the nail belt body is provided with at least one mounting hole, and the first protrusion is passed through the mounting hole.

[0029] In some embodiments, the staple cartridge assembly includes a plurality of staple bands, the plurality of staple bands are arranged along the axial direction of the stapler, and the first protrusion is located between the staple band bodies of two adjacent staple bands.

[0030] In some embodiments, the first surface of the nail band body is provided with at least one third protrusion, and the side surface of the third protrusion facing away from the nail band body is abutted against the second surface of the nail magazine cover; and / or, the second surface of the nail magazine cover is provided with a fourth protrusion protruding toward the nail band, and the side surface of the fourth protrusion facing the nail band body is abutted against the first surface of the nail band body.

[0031] In some embodiments, the staples are degradable and biocompatible staples; and / or, the staples are bioabsorbable and biocompatible staples.

[0032] In some embodiments, the surface of the staple is provided with a biodegradable and bioabsorbable biocompatible coating; and / or the surface of the staple is provided with a magnetic coating, and the staple is magnetized under the action of an external magnetic field.

[0033] An embodiment of the present invention further provides a medical stapler, comprising the above-mentioned staple cartridge assembly.

[0034] The stapler assembly and medical stapler provided by the present invention have the following advantages:

[0035] The present invention provides a stapler assembly for a medical stapler. A staple hole is provided at the bent portion of a stapler cover, and the height of the second hole wall is lower than that of the first hole wall. Part of the height of the staple hole is sunken, making it easier for the staples to detach from the stapler cover after closing. At the same time, more tissue can enter the opening of the staple, making it easier to puncture the tissue and shape it, thereby improving the surgical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings.

[0037] Figure 1 is a structural schematic diagram of a staple cartridge assembly according to a first embodiment of the present invention;

[0038] Figure 2 yes Figure 1 Enlarged view of the middle B1 area;

[0039] Figure 3 yes Figure 1 A1-A1 cross-sectional view;

[0040] Figure 4 is a structural schematic diagram of a nail cartridge cover according to a first embodiment of the present invention;

[0041] Figure 5 is a front view of a staple cartridge cover according to a first embodiment of the present invention;

[0042] Figure 6 yes Figure 5 A2-A2 cross-sectional view;

[0043] Figure 7 2 is a schematic structural diagram of a staple cartridge assembly according to a first embodiment of the present invention, with one staple cartridge cover removed;

[0044] Figure 8 is a side view of the staple cartridge assembly of the first embodiment of the present invention with one side staple cartridge cover removed;

[0045] Figure 9 is a schematic structural diagram of a firing block according to a first embodiment of the present invention;

[0046] Figure 10 is a structural schematic diagram of a staple cartridge assembly according to a second embodiment of the present invention, with the staple cartridge cover removed;

[0047] Figure 11 1 is a partial structural diagram of the cooperation between the nail belt and the firing block according to the second embodiment of the present invention;

[0048] Figure 12 This is a schematic structural diagram of the cooperation between the staple cartridge cover and the staple strip body according to the second embodiment of the present invention;

[0049] Figure 13 This is a schematic structural diagram of the cooperation between the staple cartridge cover and the staple strip body according to the third embodiment of the present invention;

[0050] Figure 14 is a schematic structural diagram of a staple cartridge cover according to a third embodiment of the present invention;

[0051] Figure 15 2. It is a schematic structural diagram of the cooperation between the cartridge cover and the firing block according to the third embodiment of the present invention;

[0052] Figure 16 is a structural schematic diagram of a staple cartridge assembly according to a fourth embodiment of the present invention, with the staple cartridge cover removed;

[0053] Figure 17 yes Figure 16 Middle B2 area enlarged view;

[0054] Figure 18 is a partial structural diagram of a staple cartridge assembly according to a fifth embodiment of the present invention;

[0055] Figure 19 and Figure 20 Schematic diagrams showing the cooperation between the anastomotic staples and the staple cartridge cover in various embodiments are shown.

[0056] Reference numerals:

[0057] 1 Third raised portion of the staple cartridge cover 213

[0058] 11 distal end of the staple cartridge cover 22 staples

[0059] 12 Proximal side 221 of the staple cartridge cover Staple connection portion

[0060] 13 Second surface 222 nail feet

[0061] 14 nail hole 223 nail crown

[0062] 141 First hole wall 2231 barb

[0063] 142 Second hole wall 3 support member

[0064] 1421 concave arc 31 distal end side of support member

[0065] 143 First section 32 Proximal side of support member

[0066] 144 Second section 33 First raised portion

[0067] 17 Fourth raised portion 34 Second raised portion

[0068] 18 bending part 4 firing block

[0069] 2 Nail strip 41 nail cutting part

[0070] 21 nail belt body 42 nail pushing part

[0071] 211 first surface 6 first gap

[0072] 212 mounting holes DETAILED DESCRIPTION

[0073] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Identical reference numerals in the drawings represent identical or similar structures, and thus repeated description thereof will be omitted.

[0074] The present invention provides a stapler assembly and a medical stapler including the same. The medical stapler includes an instrument platform, a firing handle movably connected to the instrument platform, and a staple head mounted on the instrument platform. The staple head includes a stapler assembly and an anvil disposed opposite each other. The stapler assembly includes: a staple band comprising at least one staple band body and a plurality of staples, the staples being rotatably connected to the staple band body via staple connectors; and a stapler cover sleeved onto the exterior of the staple band body. The upper plate of the stapler cover at least partially covers the upper surface of the staple band body. The stapler cover includes a bent portion extending axially along the stapler, the bent portion being provided with a plurality of staple holes. The staple holes include a first hole wall and a second hole wall extending axially along the stapler. The height of the first hole wall is higher than the height of the second hole wall, allowing more tissue to enter the staple opening, making it easier to puncture and form the tissue. At the same time, the height of the staple holes is partially sunken, making it easier for the staples to detach from the stapler cover after closure, thereby improving the surgical effect.

[0075] The structures of the nail magazine assemblies of various specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. It should be understood that the various specific embodiments are not intended to limit the scope of protection of the present invention.

[0076] like Figures 1 to 9The figure shows a schematic structural diagram of the stapler assembly of the first embodiment of the present invention. The stapler assembly includes a staple band 2, a support member 3 for carrying the staple band 2, and a stapler cover 1 for accommodating the staple band 2 and the support member 3. The staple band 2 includes at least one staple band body 21 and a plurality of staples 22, and the staples 22 are rotatably and detachably connected to the staple band body 21 through staple connecting portions 221. The stapler cover 1 is sleeved on the outside of the staple band body 21 and at least partially covers the upper surface of the staple band body 21. A firing block 4 is also provided on the proximal side of the stapler assembly. The firing block 4 is located at the bottom of the stapler cover 1 and can move along the axial direction of the stapler. In the initial state, the firing block 4 is located proximally of the stapler assembly. When the stapler is fired, the firing block 4 moves toward the distal end of the stapler assembly, contacting the staples 22, driving the staples 22 to rotate and close at the anvil, and then disengaging from the stapler strip body 21 and the stapler cover 1. In this embodiment, two support members 3, two stapler strips 2, and two stapler cover 1 are provided. The stapler strips 2 are respectively provided on corresponding support members 3, and staples 22 are provided on both sides of the stapler strips 2. The stapler cover 1 is sleeved onto the exterior of the support members 3 and the stapler strips 2, i.e., the two stapler strips 2 and the support members 3 are symmetrically arranged along the axial direction of the stapler. In other alternative embodiments, the number of support members 3, stapler strips 2, and stapler cover 1 can be varied as needed, and is not limited to that shown in the figures. The stapler strips 2 can also be provided with staples 22 on only one side, all of which fall within the scope of protection of the present invention. In this embodiment, during the rotation of the staple 22, the side walls of the staple 22 at least partially abut against the support member 3 and the inner wall of the side plate of the staple magazine cover 1 at the same time, so that the side walls of the staple are always limited, preventing the staple 22 from deviating inwardly or outwardly during the rotation.

[0077] like Figures 1 to 6As shown, the stapler cover 1 includes a bent portion 18 extending along the axial direction of the stapler. The bent portion 18 is provided with a plurality of staple holes 14. The staple holes 14 include a first hole wall 141 and a second hole wall 142 extending along the axial direction of the stapler. The first hole wall 141 and the second hole wall 142 are located on different planes. Specifically, the first hole wall 141 is located on the upper plate of the stapler cover 1, and the second hole wall 142 is located on the side plate of the stapler cover 1. The height of the first hole wall 141 is higher than the height of the second hole wall 142. Therefore, part of the height of the staple hole 14 is sunken and extends to the side plate of the stapler cover 1. The resulting staple hole 14 is a three-dimensional nail hole, which provides a larger exposed space in the stapler cover 1. That is, the staple hole 14 is recessed downward into the side plate of the stapler cover 1. In this way, the staples 22 are more exposed, so that the tissue can fully enter the outline of the staples 22 during closing, which can better pierce the tissue and achieve anastomosis. At the same time, it is easier for the staples 22 to pass upward through the staple holes 14 and disengage from the staple magazine cover 1 after closing.

[0078] In the present invention, the distal side and the proximal side are relative to the operator, the end closer to the operator is the proximal side, the end farther from the operator, that is, the end closer to the surgical site is the distal side, and the direction along the axis of the stapler is the axial direction, that is, the direction from the distal side to the proximal side of the stapler, or from the proximal side to the distal side of the stapler. For example, in Figure 1 In the perspective of , for the nail magazine cover 1, its distal side 11 is the right side, and its proximal side 12 is the left side. Figure 10 In the perspective of , for the support member 3, its distal side 31 is the right side, and its proximal side 32 is the left side. In the present invention, for a component, the inner side and the outer side are relative to its center, the side close to the center is the inner side, and the side away from the center is the outer side. In the present invention, Figure 1 The S1 direction is the direction from the proximal end to the distal end of the stapler, and the S1 direction or the direction opposite to the S1 direction is defined as the axial direction of the stapler. Figure 3 and Figure 6 The S2 direction is the height direction, that is, the longitudinal direction, and the upper plate of the nail magazine cover 1 is located above the nail belt body 21. Definition Figure 3 The S3 direction is the width direction, that is, the transverse direction. The left and right sides of the upper plate of the staple cartridge cover 1 are connected to a side plate respectively through a bending portion 18 , and the anastomosis staples 22 are located on the left and right sides of the staple band body 21 .

[0079] like Figures 1 to 3As shown, the bent portion 18 is connected between the upper plate and a side plate of the staple cartridge cover 1. The staple hole 14 includes a first section 143 and a second section 144. The first section 143 of the staple hole 14 is formed on the upper plate of the staple cartridge cover 1, while the second section of the staple hole 14 is formed on the side plate of the staple cartridge cover 1. The first section 143 of the staple hole 14 has a first hole wall 141 on the side away from the second section 144, while the second section 144 of the staple hole 14 has a second hole wall 142 on the side away from the first section 143. The first hole wall 141 is parallel to the side plate of the staple cartridge cover 1, while the second hole wall 142 is parallel to the upper plate of the staple cartridge cover 1. In this embodiment, the highest point of the staple connecting portion 221 of the staple 22 is lower than the highest point of the first hole wall 141 of the staple hole 14. That is, the highest point of the staple connecting portion 221 does not protrude above the upper plate of the staple cartridge cover 1. Therefore, when the stapler is not fired, the staple connecting portion 221 does not come into contact with tissue. The lowest point of the staple connecting portion 221 of the staple 22 is lower than the highest point of the second hole wall 142 of the staple hole 14, so that in the initial state, the staple connecting portion 221 is not completely exposed outside the staple hole 14, thereby improving the stability of the staple 22 in the staple hole 14 when the stapler is not fired.

[0080] like Figure 3 As shown, in this embodiment, the projection of the staple connecting portion 221 on the side plate of the staple cartridge cover 1 and the projection of the staple hole 14 on the side plate of the staple cartridge cover 1 at least partially overlap. When the stapler is fired, the staples 22 are more easily detached from the staple cartridge cover 1 after being closed and formed. Figure 3 For example, the projection of the nail connecting portion 221 on the left side plate of the nail magazine cover 1 at least partially overlaps with the projection of the nail hole 14 on the left side plate of the nail magazine cover 1 .

[0081] like Figures 1 to 3 As shown in FIG. 1 , in this embodiment, the height of the staple legs 222 of the staples 22 is lower than the lowest point of the second hole wall 142 of the staple hole 14. This ensures that when the stapler is not fired, the staple legs 222 of the staples 22 will not be exposed outside the staple hole 14, thus preventing the staple legs 222 from scratching tissue. Figure 7 As shown, the staple 22 further includes a crown portion 223, which is connected to the staple connecting portion 221. The crown portion 223 is provided with barbs 2232. In the initial rotation state, the second hole wall 142 is arranged higher than the barbs 2232 to prevent the barbs 2232 from being exposed in the staple hole 14 in the initial state and scratching the tissue.

[0082] like Figure 3As shown, the lateral distance (S2 direction) between the first hole wall 141 and the second hole wall 142 of the staple hole 14 is greater than the lateral distance between the two sides of the staple 22. That is, the width of the staple hole 14 is greater than the width of the staple 22, ensuring that the staple 22 can fully pass through the staple hole 14 without getting stuck when the stapler is fired. Preferably, the projection of the staple 22 on the upper plate of the staple cartridge cover 1 falls within the coverage of the projection of the staple hole 14 on the upper plate of the staple cartridge cover 1. When the firing block 4 drives the staple 22 upward, the staple 22 can pass through the staple hole 14 more smoothly without being blocked by the wall of the staple hole 14 or getting stuck inside the staple hole 14.

[0083] like Figure 6 As shown, the nail magazine cover 1 includes two bending portions 18 located on both sides of the nail belt 2, namely Figure 6 From the perspective of , a bending portion 18 is provided on the left and right sides of the upper plate of the nail magazine cover 1 respectively. One bending portion 18 connects the upper plate and the left side plate of the nail magazine cover 1, and the other bending portion 18 connects the upper plate and the right side plate of the nail magazine cover 1. The surface of the bending portion 18 is a smooth arc surface. In this embodiment, it is only exemplified that the nail hole 14 is provided in the bending portion 18 on one side of the nail magazine cover 1. Another type of nail hole is provided at a position close to the right side plate of the upper plate of the nail magazine cover 1, and this type of nail hole is completely opened in the upper plate of the nail magazine cover 1. In another alternative embodiment, a plurality of nail holes 14 may be provided on each of the two bending portions 18, that is, the two rows of nail holes 14 provided in the nail magazine cover 1 are symmetrical with respect to the center line of the nail magazine cover 1.

[0084] like Figures 7-9 As shown, the firing block 4 includes a nail pushing portion 42 and a nail cutting portion 41. When the stapler is fired, the firing block 4 moves along the S1 direction from the proximal side of the staple cartridge assembly to the distal side of the staple cartridge assembly. The nail pushing portion 42 of the firing block 4 first contacts the nail crown portion 223 of the staple 22, driving the nail foot 222 of the staple 22 to rotate around the nail connecting portion 221 and extend upward from the nail hole 14. Under the action of the nail anvil, the staples are closed into a D shape. The nail pushing portion 42 cuts off the nail connecting portion 221, and the staples 22 can be separated from the staple band body 21, move upward through the nail hole 14, and close on the tissue, and detach from the staple cartridge cover 1.

[0085] like Figure 7 and Figure 8As shown, the inner surface of the staple cartridge cover 1 is in contact with the upper surface of the staple strip body 21. The height of the staple cutting portion 41 at the top of the firing block 4 may be lower than or equal to the height of the upper surface of the staple strip 2. When the firing block 4 moves toward the distal end, the staple cutting portion 41 may not easily drive the staples 22 to separate from the staple strip body 21 at the staple connecting portion 221, which may cause the staples 22 to be unable to separate from the staple strip body 21.

[0086] like Figures 10-12 The figure shows a schematic structural diagram of a nail magazine assembly according to a second embodiment of the present invention. The difference between this embodiment and the first embodiment is that a first gap 6 is formed between the upper surface of the nail band body 21 and the side surface of the nail magazine cover opposite to the upper surface. The side surface of the nail band body 21 facing away from the support member 3 is defined as the first surface 211, that is, the upper surface of the nail band body 21 is the first surface 211, and the side surface of the nail magazine cover 1 opposite to the first surface 211 of the nail band body 21 is the second surface 13, and a first gap 6 is formed between the first surface 211 and the second surface 13. In this embodiment, the second surface 13 of the nail magazine cover 1 is the inner surface of the upper plate of the nail magazine cover 1.

[0087] Figure 12 The staple strip body 21 is represented by a box, and the main structure of the support member 3 is omitted. Only the matching relationship between the first protrusion 33, the staple strip body 21 and the staple cartridge cover 1 is shown as an example. There is a first gap 6 between the first surface 211 of the staple strip body 21 and the second surface 13 of the staple cartridge cover 1. The height of the first gap 6 is h1. The height h1 of the first gap 6 can be different depending on the size of the staple cartridge assembly. Figure 11 As shown, 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 staples 22 to separate from the staple band 2, thereby ensuring that when the stapler is fired, the firing block 4 can push the staples 22 toward the anvil and close them on the tissue.

[0088] In this embodiment, the highest point of the nail cutting portion 41 of the firing block 4 abuts against the second surface 13 of the nail magazine cover 1, and the nail cutting portion 41 of the firing block 4 can maximize the use of the first gap 6 to better drive the staples 22 to separate from the staple band 2. Figure 11 As shown, 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 staple 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 stapler, ensuring that the staples 22 are completely separated from the staple band body 21 and stapled to the tissue when the stapler is fired.

[0089] like Figures 10-12 As shown, in this embodiment, at least one first protrusion 33 is provided on the surface of the support member 3. The height of the side surface of the first protrusion 33 facing away from the support member 3 (in this embodiment, the upper surface of the first protrusion 33) is higher than the height of the first surface 211 of the nail band body 21. The side surface of the first protrusion 33 facing away from the support member 3 abuts against the second surface 13 of the nail magazine cover 1. The abutting action of the first protrusion 33 creates a first gap 6 between the first surface 211 of the nail band body 21 and the second surface 13 of the nail magazine cover 1. The height of the portion of the first protrusion 33 located between the second surface 13 of the nail magazine cover 1 and the first surface 211 of the nail band body 21 is the height of the portion of the first protrusion 33 protruding from the first surface 211 of the nail band body 21, and this height is equal to the height h1 of the first gap 6.

[0090] like Figure 10 and Figure 11 As shown, the distance between the inner and outer sides of the first protrusion 33 is smaller than the distance between the inner and outer sides of the nail belt body 21, that is, the lateral width of the first protrusion 33 is smaller than the lateral width of the nail belt body 21. The surface of the nail belt body 21 is provided with at least one mounting hole 212, and the first protrusion 33 is inserted into the mounting hole 212. In this embodiment, the side surface of the first protrusion 33 facing away from the nail belt body 21 is parallel to and abuts against the second surface 13 of the staple cartridge cover 1, thereby enhancing the mating stability between the first protrusion 33 and the nail belt body 21. The first protrusion 33 can be fixedly connected to the mounting hole 212 by welding, for example, to improve mating stability.

[0091] like Figure 11 As shown, in this embodiment, the first raised portion 33 is a boss, and the projection of the boss on the first surface 211 of the nail belt body 21 is a rounded rectangle, that is, each corner of the boss is provided with an arc guide surface, and when the nail belt 2 is assembled with the support member 3, the arc guide surface can better guide the boss into the mounting hole 212. The shape of the first raised portion 33 here is only an example. In other alternative embodiments, the first raised portion 33 can also adopt other shapes. For example, the projection of the first raised portion 33 on the first surface 211 of the nail belt body 21 is a rectangle, or a triangle, a rhombus, a trapezoid, etc. The area of ​​the upper surface of the first raised portion 33 can also be different from the area of ​​the lower surface. For example, the first raised portion 33 is a cone structure with a large lower surface area and a small upper surface area, all of which fall within the scope of protection of the present invention.

[0092] In this embodiment, the surface of the support member 3 is further provided with two second protrusions 34, and the second protrusions 34 are located on the proximal and distal sides of the nail band body 21. The height of the side surface of the second protrusion 34 facing away from the support member 3 is higher than the height of the first surface 211 of the nail band body 21, and the side surface of the second protrusion 34 facing away from the support member 3 abuts against the second surface 13 of the nail band body 21. The side surface of the first protrusion 33 facing away from the support member 3 is the same as the height of the side surface of the second protrusion 34 facing away from the support member 3. In this embodiment, the lateral width of the second protrusion 34 is equal to the lateral width of the nail band body 21. The second protrusion 34 can be fixedly connected to the nail band body 21 by welding, for example, to improve the matching stability of the support member 3 and the nail band 2.

[0093] In this embodiment, the number and arrangement of the first protrusions 33 can be selected as needed, and can be evenly or unevenly distributed on the surface of the support member 3 along the axial direction of the anastomosis device; in another alternative embodiment, the surface of the support member 3 can be provided with only the first protrusion 33, and not the second protrusion 34; in another alternative embodiment, the surface of the support member 3 can be provided with only the second protrusion 34, and not the first protrusion 33; in another alternative embodiment, the second protrusion 34 can be provided only on the distal side, or only on the proximal side; in another alternative embodiment, the second protrusion 34 can also adopt the same shape and size as the first protrusion 33.

[0094] like Figure 13 FIG2 is a schematic structural diagram of a staple cartridge assembly according to a third embodiment of the present invention. In this embodiment, a third protrusion 213 is directly provided on the upper surface of the staple strip 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 strip 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. In this embodiment, the upper surface of the third protrusion 213 is parallel to and in contact with the second surface 13 of the staple cartridge cover 1 to improve mating stability. The shape, size, number, and arrangement of the third protrusion 213 can be selected and set as needed and are not limited to those shown in the figure. This embodiment can also facilitate the purpose of the staple cutting portion 41 of the firing block 4 driving the staples 22 to separate from the staple strip 2.

[0095] Figure 14 and Figure 15The structure of a staple cartridge assembly according to a fourth embodiment of the present invention is shown. This embodiment differs from the first embodiment in that the support member 3 lacks the first and second protrusions 33 and 34. Instead, the second surface 13 of the staple cartridge cover 1 is provided with a fourth protrusion 17 that projects toward the staple strip 2. The side of the fourth protrusion 17 facing the staple strip body 21 abuts against the first surface 211 of the staple strip body 21. The height of the fourth protrusion 17 is equal to the height h1 of the first gap 6. In this embodiment, the side of the fourth protrusion 17 facing the staple strip body 21 serves as the lower surface of the fourth protrusion 17, which is parallel to and in contact with the first surface 211 of the staple strip body 21 to enhance mating stability. The shape, size, number, and arrangement of the fourth protrusions 17 can be customized and are not limited to those shown in the figure. This embodiment also facilitates the separation of the staples 22 from the staple strip 2 by the cutting portion 41 of the firing block 4.

[0096] The raised portions in the second, third, and fourth embodiments are respectively provided on the support member 3, the staple tape body 21, and the staple cartridge cover 1, so as to achieve a first gap 6 between the first surface 211 of the staple tape body 21 and the second surface 13 of the staple cartridge cover 1. In other alternative embodiments, the three embodiments may be used in combination, for example, two or more of the first raised portion 33, the second raised portion 34, the third raised portion 213, and the fourth raised portion 17 may be provided simultaneously, all of which fall within the scope of protection of the present invention.

[0097] Figure 16 and Figure 17 This is a schematic diagram illustrating the mating of a staple strip and a support member according to the fifth embodiment of the present invention. Similar to the second embodiment, this embodiment comprises a first protrusion 33 and two second protrusions 34 on the surface of the support member 3. The two second protrusions 34 are located on the distal side 31 and proximal side 32 of the support member 3, with the first protrusion 33 positioned between the two second protrusions 34. The upper surfaces of the first and second protrusions 33 and 34 abut against the second surface 13 of the staple cartridge cover 1. The fifth embodiment differs from the second embodiment in that in this embodiment, the staple cartridge assembly comprises multiple staple strips 2 arranged axially along the stapler, with the first protrusion 33 positioned between the staple strip bodies 21 of two adjacent staple strips 2. The two second protrusions 34 are located on the distal side of the farthest staple strip 2 and the proximal side of the closest staple strip 2, respectively. The first protrusion 33 can be fixedly connected to the staple strips 2, for example, by welding, to enhance the mating stability between the support member 3 and the staple strips 2. The second protrusion 34 may also be fixedly connected to the nail belt 2 by welding, for example, to improve the matching stability between the support member 3 and the nail belt 2 .

[0098] like Figures 16-17 As shown, in this embodiment, the distance between the inner side and the outer side of the first protrusion 33 is equal to the distance between the inner side and the outer side of the nail belt body 21, that is, the transverse width of the first protrusion 33 is equal to the transverse width of the nail belt body 21, which can better position the installation of multiple nail belts 2 and better maintain the stability of the nail belt 2. In other alternative embodiments, the distance between the inner side and the outer side of the first protrusion 33 can also be smaller than the distance between the inner side and the outer side of the nail belt body 21. For example, the shape and size of the first protrusion 33 of the second embodiment can be adopted, which also falls within the scope of protection of the present invention.

[0099] This fifth embodiment is also susceptible to numerous variations, all of which fall within the scope of protection of the present invention. The number, size, shape, and arrangement of the first and second protrusions 33, 34 in the fifth embodiment are not limited to those shown in the figures. The length of the stapler band 2 along its axial direction and the number of stapler bands 2 are also not limited to those shown in the figures and may be adjusted as needed. In an alternative embodiment, only the first protrusion 33 may be provided without the second protrusion 34.

[0100] like Figure 18 FIG2 is a partial structural diagram of a staple cartridge assembly according to a sixth embodiment of the present invention. This embodiment differs from the first embodiment in that a concave arc 1421 is provided at both the distal and proximal ends of the second hole wall 142 of the staple hole 14, with the lowest point of the concave arc 1421 being lower than the height of the second hole wall 142. Figure 18 The figure exemplarily shows a concave arc 1421 disposed on the second hole wall 142 of one staple hole 14. In other embodiments, the concave arc 1421 may be disposed on the second hole walls 142 of all staple holes 14, or on the second hole walls 142 of some staple holes 14. The provision of the concave arc 1421 makes it easier for the staple 22 to be removed from the staple hole 14 after being formed. Preferably, in the initial state, the lowest point of the concave arc 1421 is higher than the lowest point of the staple connecting portion 221 of the staple 22, preventing the staple connecting portion 221 from being completely exposed outside the staple hole 14, thereby improving the stability of the staple 22 in the staple hole 14 when the stapler is not fired.

[0101] Figure 19 and Figure 20 The structure of the staple cartridge cover and the staples is shown as an example. In order to more clearly illustrate the cooperation between the staple cartridge cover and the staples, Figure 19 and Figure 20 The nail magazine cover is in a perspective form, and the support member and the nail strip body are omitted. Figure 19 and Figure 20The matching form of the middle staple cartridge cover and the anastomosis staple can be applicable to any of the above-mentioned first to sixth embodiments, that is, it can be applicable to the matching of the staple cartridge cover 1 and the anastomosis staple 22 using the staple hole 14 (without the concave arc 1421) of the first to fifth embodiments, and can also be applicable to the matching of the staple cartridge cover 1 and the anastomosis staple 22 using the staple hole 14 (with the concave arc 1421) of the sixth embodiment.

[0102] like Figure 19 As shown, in the initial state, the heights of the staple legs 222, the staple arcs 223, and the barbs 2231 of the staple 22 are all lower than the second hole wall 142 of the staple hole 14. The highest point of the staple connecting portion 221 is higher than the second hole wall 142 of the staple hole 14, but lower than the highest point of the first hole wall 141 of the staple hole 14. The lowest point of the staple connecting portion 221 is lower than the second hole wall 142 of the staple hole 14. In the embodiment with the concave arc 1421, the lowest point of the staple connecting portion 221 is lower than the lowest point of the concave arc 1421. Figure 20 As shown, after the staple 22 is closed and formed, the crown portion 223 rotates to the axial direction, and the second hole wall 142 is higher than the lowest point of the crown portion 223, thereby forming a side stop for the crown portion 223, ensuring that the staple 22 will not deviate to the outside during the process of being pushed upward out of the staple hole 14.

[0103] In each of the above embodiments, the staple strip 2 is made of a biocompatible material. In a preferred embodiment, the staple strip body 21 and the staples 22 can be made of different materials. For example, in some embodiments, the staple strip body 21 is made of a non-absorbable, non-degradable material such as titanium, titanium alloy, or stainless steel, while the staples can be made of a biocompatible, degradable material, or a biocompatible, degradable and bioabsorbable staple. After the staples 22 are attached to the tissue, subsequent staple removal is unnecessary. For example, the staples 22 can be made of magnesium, magnesium alloy, or a biodegradable polymer, but the present invention is not limited thereto. Furthermore, the surface of the staples 22 can be coated with a biocompatible, biodegradable, and bioabsorbable coating. This coating can further increase the hardness of the staples 22 and regulate their degradation rate. This coating can be, for example, an absorbable material such as poly (L-lactic acid) (PLLA) and / or poly (D-lactic acid) (PLLA), but the present invention is not limited thereto. By adjusting the thickness of the coating, the degradation rate of the staples 22 can be adjusted. Alternatively, the coating can include a coagulant agent, for example, to reduce bleeding during the anastomosis process. In other embodiments, the surface of the staples 22 can be provided with a magnetic coating. When an external magnetic field is applied, the coating becomes magnetized, thereby enhancing the anastomosis strength. The external magnetic field can be an electromagnetic field, the intensity of which can be adjusted to suit the anastomosis requirements, or a permanent magnetic field.

[0104] In summary, the stapler assembly and medical stapler provided by the present invention have the following advantages:

[0105] The present invention provides a stapler assembly for a medical stapler. A staple hole is provided at the bent portion of the stapler cover, the height of the second hole wall is lower than that of the first hole wall, and part of the height of the staple hole is sunken, so that the staples are more easily detached from the stapler cover after closing, thereby improving the surgical effect.

[0106] The above is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention should not be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A staple cartridge assembly, characterized in that: For a medical stapler, the staple cartridge assembly comprises: A staple band comprises at least one staple band body and a plurality of staples, wherein the staples are rotatably connected to the staple band body via staple connecting portions; A staple cartridge cover is sleeved on the outside of the stapler body, the staple cartridge cover includes a bent portion extending along the axial direction of the stapler, the bent portion is provided with a plurality of staple holes, the staple holes include a first hole wall and a second hole wall extending along the axial direction of the stapler, the first hole wall and the second hole wall are located on different planes, the staple holes are three-dimensional, and the height of the first hole wall is higher than the height of the second hole wall.

2. The staple cartridge assembly according to claim 1, wherein: The bending portion is connected between the upper plate and a side plate of the nail magazine cover, and the nail hole includes a first section and a second section that are connected to each other. The first section of the nail hole is opened on the upper plate of the nail magazine cover, and the second section of the nail hole is opened on the side plate of the nail magazine cover. The first section of the nail hole has the first hole wall on the side away from the second section, and the second section of the nail hole has the second hole wall on the side away from the first section.

3. The staple cartridge assembly according to claim 2, wherein: The first hole wall is parallel to the side plate of the nail magazine cover, and the second hole wall is parallel to the upper plate of the nail magazine cover.

4. The staple cartridge assembly according to claim 2, wherein: The height of the highest point of the nail connecting portion is lower than the height of the highest point of the first hole wall of the nail hole.

5. The staple cartridge assembly according to claim 2, wherein: The height of the lowest point of the nail connecting portion is lower than the height of the highest point of the second hole wall of the nail hole.

6. The staple cartridge assembly according to claim 2, wherein: The projection of the nail connecting portion on the side plate of the nail magazine cover and the projection of the nail hole on the side plate of the nail magazine cover at least partially overlap.

7. The staple cartridge assembly according to claim 2, wherein: The distance between the first hole wall and the second hole wall of the staple hole in the transverse direction is greater than the distance between the two sides of the anastomosis staple in the transverse direction.

8. The staple cartridge assembly according to claim 7, wherein: The projection of the anastomosis staple on the upper plate of the staple cartridge cover falls within the coverage range of the projection of the staple hole on the upper plate of the staple cartridge cover.

9. The staple cartridge assembly according to claim 2, wherein: Concave arcs are provided at the distal end and the proximal end of the second hole wall, and the lowest point of the concave arc is lower than the height of the second hole wall.

10. The staple cartridge assembly according to claim 2, wherein: The nail magazine cover includes two bent portions located on both sides of the nail belt, and the two bent portions are respectively provided with a plurality of nail holes.

11. The staple cartridge assembly according to claim 1, wherein: The surface of the bent portion is a smooth arc surface.

12. The staple cartridge assembly according to claim 1, wherein: A support member is further included. During the rotation of the staples, at least a portion of the side walls of the staples are simultaneously pressed against the support member and the inner wall of the side plate of the staple cartridge cover.

13. The staple cartridge assembly according to claim 12, wherein: The staple further includes a crown portion connected to the staple connecting portion. After the staple is closed and formed, the crown portion rotates to an axial direction, and the second hole wall is higher than the lowest point of the crown portion.

14. The staple cartridge assembly according to claim 13, wherein: The nail crown is provided with barbs, and in an initial rotation state, the second hole wall is higher than the barbs.

15. The staple cartridge assembly according to claim 12, wherein: Also included is a firing block, wherein the nail band body is mounted on one side of the support member, and the nail band body includes a first surface facing away from the support member; The cartridge cover includes a second surface opposite to the first surface of the staple tape body, and a first gap is formed between the first surface of the staple tape body and the second surface of the cartridge cover; The firing block is movably arranged at the bottom of the stapler cover and can move along the axial direction of the stapler. The firing block includes a staple cutting portion, and 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.

16. The staple cartridge assembly according to claim 15, wherein: The lowest point of the nail cutting portion of the firing block is lower than the height of the first surface of the nail band body, and the nail cutting portion of the firing block is at least partially aligned with the nail connecting portion in the axial direction of the stapler.

17. The staple cartridge assembly according to claim 15, wherein: It also includes at least one raised portion, which is at least partially located between the first surface of the nail band body and the second surface of the nail magazine cover, and the height of the portion of the raised portion located between the first surface of the nail band body and the second surface of the nail magazine cover is equal to the height of the first gap.

18. The staple cartridge assembly according to claim 17, wherein: The surface of the support member is provided with at least one first protrusion, the height of the side surface of the first protrusion facing away from the support member is higher than the height of the first surface of the nail band body, and the side surface of the first protrusion facing away from the support member is in contact with the second surface of the nail magazine cover.

19. The staple cartridge assembly according to claim 18, wherein: The distance between the inner side and the outer side of the first protrusion is smaller than the distance between the inner side and the outer side of the nail belt body. The surface of the nail belt body is provided with at least one mounting hole, and the first protrusion is passed through the mounting hole.

20. The staple cartridge assembly according to claim 18, wherein: The staple cartridge assembly includes a plurality of staple bands arranged along the axial direction of the stapler, and the first protrusion is located between the staple band bodies of two adjacent staple bands.

21. The staple cartridge assembly according to claim 17, wherein: At least one third protrusion is provided on the first surface of the nail belt body, and a side surface of the third protrusion facing away from the nail belt body abuts against the second surface of the nail cartridge cover; And / or, the second surface of the nail magazine cover is provided with a fourth protrusion protruding toward the nail band, and a side surface of the fourth protrusion facing the nail band body abuts against the first surface of the nail band body.

22. The staple cartridge assembly according to claim 1, wherein: The anastomosis staple is a degradable and biocompatible anastomosis staple; and / or, the anastomosis staple is a bioabsorbable and biocompatible anastomosis staple.

23. The staple cartridge assembly according to claim 1, wherein: The surface of the staple is provided with a degradable and bioabsorbable biocompatible coating; and / or the surface of the staple is provided with a magnetic coating, and the staple is magnetized under the action of an external magnetic field.

24. A medical stapler, characterized in that: A staple cartridge assembly comprising the staple cartridge assembly of any one of claims 1 to 23.

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