CN115721354A - Nail bin assembly and medical anastomat - Google Patents

Abstract

The invention provides a nail bin assembly and a medical anastomat, wherein the nail bin assembly comprises: a staple strip comprising at least one staple strip body and a plurality of staples rotatably connected to the staple strip body by staple connections; the nail bin cover is sleeved outside the nail belt body and comprises a bending part extending along the axial direction of the anastomat, a plurality of nail holes are formed in the bending part and comprise a first hole wall and a second hole wall extending along the axial direction of the anastomat, and the height of the first hole wall is higher than that of the second hole wall. According to the invention, the nail holes are arranged at the bending part of the nail bin cover, the height of the second hole wall is lower than that of the first hole wall, and the nail holes are partially sunken, so that anastomotic nails are easier to separate from the nail bin cover after being closed.

Description

Nail bin assembly and medical anastomat

Technical Field

The invention relates to the technical field of medical instruments, in particular to a nail bin assembly and a medical anastomat.

Background

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 nail head may be passed through a small incision in the body by a penetrator to access the surgical site for performing the surgery. The nail head comprises a nail bin assembly and a nail anvil which are oppositely arranged. The nail bin assembly comprises a nail belt, a supporting piece for supporting the nail belt and a nail bin cover for accommodating the nail belt and the supporting piece, and a firing block is arranged on the proximal end side of the nail bin cover. When the anastomat is triggered, the cutter is pushed to move towards the far-end side through the push broach rod, the cutter drives the triggering block to move towards the far-end side of the anastomat, the triggering block enables the anastomotic nails which are rotatably connected to the nail belt body to be pushed out outwards, the nail cutting portion of the triggering block drives the anastomotic nails to be separated from the nail belt body, and the cutter cuts off tissues between the nail bin assembly and the nail anvil to achieve triggering of the anastomat.

In the existing nail bin assembly, nail holes corresponding to the anastomotic nails are formed in the upper plate of the nail bin cover, however, due to the fact that the upper plate of the nail bin cover is high in height, the situation that the nail bin cover cannot be completely separated after the anastomotic nails are closed can occur, and the operation effect is affected.

In the present invention, the distal side and the proximal side are relative to the operator, and the end closer to the operator is the proximal side, and the end farther from the operator, that is, the end closer to the surgical site is the distal side. In the stapler, the inner side and the outer side are relative to the axis of the stapler, wherein the side close to the axis is the inner side, and the side far away from the axis is the outer side.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a staple cartridge assembly and a medical stapler, so that staples can be separated from a staple cartridge cover more easily after being closed.

The embodiment of the invention provides a nail bin assembly, which comprises:

a staple strip comprising at least one staple strip body and a plurality of staples rotatably connected to the staple strip body by staple connections;

the nail bin cover is sleeved outside the nail belt body and comprises a bending part extending along the axial direction of the anastomat, the bending part is provided with a plurality of nail holes, the nail holes comprise a first hole wall and a second hole wall extending along the axial direction of the anastomat, and the height of the first hole wall is higher than that of the second hole wall.

In some embodiments, the bending portion is connected between an upper plate and a side plate of the nail bin cover, the nail hole includes a first section and a second section which are communicated with each other, the first section of the nail hole is arranged on the upper plate of the nail bin cover, the second section of the nail hole is arranged on the side plate of the nail bin cover, the first hole wall is arranged on one side, away from the second section, of the first section of the nail hole, and the second hole wall is arranged on one side, away from the first section, of the second section of the nail hole.

In some embodiments, the first aperture wall is parallel to a side panel of the magazine cover and the second aperture wall is parallel to an upper panel of the magazine cover.

In some embodiments, the height of the highest point of the staple connecting portion is lower than the height of the highest point of the first aperture wall of the staple aperture.

In some embodiments, the height of the lowest point of the staple connecting portion is lower than the height of the highest point of the second aperture wall of the staple aperture.

In some embodiments, a projection of the staple connecting portion on a side panel of the magazine cover at least partially coincides with a projection of the staple aperture on a side panel of the magazine cover.

In some embodiments, the first and second walls of the staple hole are laterally spaced further apart than the sides of the staple.

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

In some embodiments, the distal and proximal ends of the second aperture wall are provided with concave arcs, the lowest point of the concave arc being lower than the height of the second aperture wall.

In some embodiments, the staple cartridge cover comprises two bent portions located at two sides of the staple belt, and the two bent portions are respectively provided with a plurality of staple holes.

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

In some embodiments, the cartridge cover further includes a buttress at least partially simultaneously bearing against the buttress and an inner wall of the side plate of the cartridge cover during rotation of the staples.

In some embodiments, the staple further includes a staple crown connected to the staple link, the staple crown being rotated to an axial direction after the staple is closed, the second aperture wall being higher than a lowest point of the staple crown.

In some embodiments, the crown portion is provided with barbs, and in the initial rotated state, the second aperture wall is higher than the barb arrangement.

In some embodiments, a firing block is further included, the staple band body being mounted to a side of the support, the staple band body including a first surface facing away from the support;

the cartridge cover comprises a second surface opposite to the first surface of the staple belt body, and a first gap is formed between the first surface of the staple belt body and the second surface of the cartridge cover;

the triggering block is movably arranged at the bottom of the staple bin cover and can move along the axial direction of the anastomat, the triggering block comprises 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 belt body.

In some embodiments, a lowest point of the staple cutting portion of the firing block has a height that is lower than a height of the first surface of the staple strip body, the staple cutting portion of the firing block being at least partially aligned with the staple connecting portion in an axial direction of the stapler.

In some embodiments, the cartridge cover further comprises at least one protrusion at least partially located between the first surface of the cartridge body and the second surface of the cartridge cover, and a height of the portion of the protrusion located between the first surface of the cartridge body and the second surface of the cartridge cover is equal to a height of the first gap.

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

In some embodiments, the distance between the inner side surface and the outer side surface of the first protruding portion is smaller than the distance between the inner side surface and the outer side surface of the nail belt body, the surface of the nail belt body is provided with at least one mounting hole, and the first protruding portion is arranged in the mounting hole in a penetrating mode.

In some embodiments, the staple cartridge assembly comprises a plurality of staple strips arranged along an axial direction of the stapler, and the first protrusions are located between staple strip bodies of two adjacent staple strips.

In some embodiments, the first surface of the staple belt body is provided with at least one third projection, and one side surface of the third projection, which faces away from the staple belt body, is abutted against the second surface of the staple cartridge cover; and/or a fourth bulge part protruding towards the nail belt is arranged on the second surface of the nail bin cover, and the surface of one side, facing the nail belt body, of the fourth bulge part is abutted against the first surface of the nail belt body.

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

In some embodiments, the surface of the staple is provided with a degradable and bioabsorbable biocompatible coating; and/or the surface of the anastomosis nail is provided with a magnetic coating, and the anastomosis nail is magnetized under the action of an external magnetic field.

The embodiment of the invention also provides a medical anastomat which comprises the nail bin assembly.

The nail bin assembly and the medical anastomat provided by the invention have the following advantages:

the invention provides a nail bin assembly for a medical anastomat, wherein a nail hole is formed in the bent part of a nail bin cover, the height of a second hole wall is lower than that of a first hole wall, and the height of part of the nail hole is lowered, so that an anastomotic nail is easier to separate from the nail bin cover after being closed, meanwhile, more tissues enter openings of the anastomotic nail, the tissues are easier to puncture for forming, and the operation effect is improved.

Drawings

Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings.

FIG. 1 is a schematic structural view of a staple cartridge assembly according to a first embodiment of the present invention;

FIG. 2 is an enlarged view of the area B1 in FIG. 1;

FIG. 3 is a sectional view taken in the direction A1-A1 of FIG. 1;

FIG. 4 is a schematic structural view of a magazine cover according to a first embodiment of the present invention;

FIG. 5 is a front view of the cartridge cover of the first embodiment of the present invention;

FIG. 6 is a sectional view taken in the direction A2-A2 of FIG. 5;

FIG. 7 is a schematic view of the first embodiment of the present invention showing the structure of the cartridge assembly with one side of the cartridge cover removed;

FIG. 8 is a side view of the first embodiment of the staple cartridge assembly of the present invention with one side of the cartridge cover removed;

FIG. 9 is a schematic structural view of a firing block of the first embodiment of the present invention;

FIG. 10 is a schematic view of a second embodiment of the cartridge assembly of the present invention with the cartridge cover removed;

FIG. 11 is a partial schematic structural view of the engagement of the staple band and the firing block of the second embodiment of the present invention;

FIG. 12 is a schematic illustration of the engagement of the cartridge cover with the staple band body in accordance with the second embodiment of the present invention;

FIG. 13 is a schematic illustration of the engagement of the cartridge cover with the staple band body in accordance with a third embodiment of the present invention;

FIG. 14 is a schematic view of the structure of the cartridge cover according to the third embodiment of the present invention;

FIG. 15 is a schematic illustration of the engagement of a staple cartridge cover with a firing block of a third embodiment of the present invention;

FIG. 16 is a schematic view of a fourth embodiment of the present invention with the cartridge assembly removed and the cartridge cover removed;

FIG. 17 is an enlarged view of the area B2 in FIG. 16;

FIG. 18 is a schematic partial structural view of a staple cartridge assembly according to a fifth embodiment of the present invention;

fig. 19 and 20 illustrate schematic views of staple and cartridge cover engagement in various embodiments.

Reference numerals:

1. nail bin cover 213 third boss

11. Distal end side 22 staple of magazine cover

12. Proximal end 221 of magazine cover staple connection

13. Second surface 222 is pinned

14. Nail hole 223 crown

141. First aperture wall 2231 barb

142. Second hole wall 3 support

1421. Distal side of concave arc 31 support

143. Proximal side of the first section 32 support

144. Second segment 33 first lobe

17. Fourth lobe 34 second lobe

18. Bending part 4 firing block

2. Nail belt 41 nail cutting part

21. Nail pushing part of nail belt body 42

211. First surface 6 first gap

212. Mounting hole

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different 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 concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted.

The invention provides a nail bin assembly and a medical anastomat comprising the same. The medical anastomat comprises an instrument platform, a firing handle movably connected to the instrument platform and a nail head mounted on the instrument platform, wherein the nail head comprises a nail bin assembly and a nail anvil which are oppositely arranged. The staple cartridge assembly comprises: a staple strip including at least one staple strip body and a plurality of staples rotatably connected to the staple strip body by staple connections; the nail bin cover is sleeved outside the nail belt body, at least part of the upper plate of the nail bin cover covers the upper surface of the nail belt body, the nail bin cover comprises a bending part extending along the axial direction of the anastomat, the bending part is provided with a plurality of nail holes, the nail holes comprise a first hole wall and a second hole wall extending along the axial direction of the anastomat, the height of the first hole wall is higher than that of the second hole wall, so that tissues enter openings of the anastomotic nails more, the tissues are easier to puncture for forming, meanwhile, the partial height of the nail holes sinks, the anastomotic nails are easier to be separated from the nail bin cover after being closed, and the operation effect is improved.

The structure of the staple cartridge assembly according to various embodiments of the present invention will be described in detail with reference to the accompanying drawings, and it should be understood that the embodiments are not intended to limit the scope of the present invention.

Fig. 1 to 9 are schematic structural views of a nail cartridge assembly according to a first embodiment of the invention. The nail cartridge assembly comprises a nail belt 2, a support 3 for carrying the nail belt 2 and a nail cartridge cover 1 for accommodating the nail belt 2 and the support 3. The staple strip 2 includes at least one staple strip body 21 and a plurality of staples 22, the staples 22 being rotatably and detachably connected to the staple strip body 21 by staple connections 221. The nail bin cover 1 is sleeved outside the nail belt body 21 and at least partially covers the upper surface of the nail belt body 21. The proximal end side of the nail bin assembly is further provided with a firing block 4, and the firing block 4 is located at the bottom of the nail bin cover 1 and can move along the axial direction of the anastomat. In an initial state, the firing block 4 is located at a proximal end side of the cartridge assembly, and when the stapler is fired, the firing block 4 moves towards a distal end side of the cartridge assembly, contacts with the staples 22, drives the staples 22 to rotate, is formed at a staple anvil in a closed mode, and is separated from the staple belt body 21 and the cartridge cover 1. In this embodiment, two supporting members 3, two nail belts 2 and two nail bin covers 1 are provided, the nail belts 2 are respectively provided on the corresponding supporting members 3, and the two sides of the nail belt 2 are provided with the staples 22, the nail bin covers 1 are sleeved on the supporting members 3 and the nail belts 2, that is, the two nail belts 2 and the supporting members 3 are respectively symmetrically arranged along the axial direction of the stapler. In other alternative embodiments, the number of the supports 3, the staple strips 2 and the cartridge cover 1 may be changed as desired, and not limited to that shown in the drawings, and it is within the scope of the present invention that only one side of the staple strips 2 may be provided with staples 22. In this embodiment, during the rotation of the staples 22, the side walls of the staples 22 are at least partially simultaneously abutted against the inner walls of the side plates of the buttress 3 and the cartridge cover 1, so that the side walls of the staples are always limited and the staples 22 are prevented from being shifted to the inner side or the outer side during the rotation.

As shown in fig. 1 to 6, the staple cartridge cover 1 includes a bending portion 18 extending along an axial direction of the stapler, the bending 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, and 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 magazine lid 1, and the second hole wall 142 is located on the side plate of the magazine lid 1. The first hole wall 141 is higher than the second hole wall 142, so that a part of the height of the nail hole 14 sinks and extends to the side plate of the magazine cover 1, and the formed nail hole 14 is a three-dimensional nail hole, so that the magazine cover 1 has a larger exposed space, i.e. the nail hole 14 sinks downwards to the side plate of the magazine cover 1. In this manner, staples 22 are more exposed so that tissue substantially enters the contours of staples 22 during closure, better puncturing of the tissue and achieving anastomosis is achieved, while staples 22 are more easily disengaged from cartridge cover 1 by passing upwardly through staple holes 14 after closure.

In the present invention, the distal side and the proximal side are, with respect 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 axial center of the stapler is the axial direction, that is, the direction from the distal side to the proximal side of the stapler, or the direction from the proximal side to the distal side of the stapler. For example, in the view of fig. 1, for cartridge cap 1, its distal side 11 is the right side and its proximal side 12 is the left side. In the perspective of fig. 10, for the support 3, its distal side 31 is the right side and its proximal side 32 is the left side. In the present invention, the inner side and the outer side are relative to the center of a component, and the side closer to the center is the inner side and the side farther from the center is the outer side. In the present invention, the direction S1 in fig. 1 is a direction from the proximal end side to the distal end side of the stapler, and the direction S1 or a direction opposite to the direction S1 is defined as an axial direction of the stapler. Defining the S2 direction in fig. 3 and 6 as the height direction, i.e., the longitudinal direction, the upper plate of the magazine cover 1 is located above the nail belt body 21. Defining S3 direction in fig. 3 as a width direction, i.e., a transverse direction, left and right sides of an upper plate of the magazine cover 1 are connected to one side plate by a bent portion 18, respectively, and staples 22 are located on left and right sides of the staple tape body 21.

As shown in fig. 1 to 3, the bent portion 18 is connected between the upper plate and the side plate of the magazine cover 1, the nail hole 14 includes a first section 143 and a second section 144 that are communicated with each other, the first section 143 of the nail hole 14 is disposed on the upper plate of the magazine cover 1, the second section of the nail hole 14 is disposed on the side plate of the magazine cover 1, one side of the first section 143 of the nail hole 14, which is far away from the second section 144, has the first hole wall 141, and one side of the second section 144 of the nail hole 14, which is far away from the first section 143, has the second hole wall 142. The first hole wall 141 is parallel to the side plate of the magazine cover 1, and the second hole wall 142 is parallel to the upper plate of the magazine cover 1. In this embodiment, the height of the highest point of staple connecting portion 221 of staple 22 is lower than the height of the highest point of first hole wall 141 of staple hole 14. I.e. the highest point of the cartridge cover 1 does not protrude from the upper plate of the cartridge connecting portion 221. Thus, the staple connections 221 do not come into contact with tissue when the stapler is unfired. The height of the lowest point of the staple connecting portion 221 of the staple 22 is lower than the height of 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 out of the staple hole 14, and the stability of the staple 22 in the staple hole 14 when the stapler is unfired is improved.

As shown in fig. 3, in this embodiment, the projection of the staple connecting portion 221 on the side plate of the magazine cover 1 and the projection of the staple hole 14 on the side plate of the magazine cover 1 at least partially overlap. The staples 22 are more easily disengaged from the cartridge cover 1 after being closed upon firing of the stapler. Taking fig. 3 as an example, a projection of the nail connecting portion 221 on the left side plate of the magazine cover 1 and a projection of the nail hole 14 on the left side plate of the magazine cover 1 at least partially overlap.

As shown in fig. 1 to 3, in this embodiment, legs 222 of staples 22 have a height lower than the height of the lowest point of second hole wall 142 of staple holes 14. Thereby ensuring that legs 222 of staples 22 do not protrude out of staple holes 14 when the stapler is unfired, and preventing legs 222 of staples 22 from scratching tissue. As shown in fig. 7, the staple 22 further includes a staple crown portion 223, the staple crown portion 223 is connected to the staple connecting portion 221, the staple crown portion 223 is provided with barbs 2232, and in the initial rotation state, the second hole wall 142 is higher than the barbs 2232, so as to avoid that the barbs 2232 are exposed out of the staple holes 14 and scratch tissues in the initial state.

As shown in fig. 3, first hole wall 141 and second hole wall 142 of staple hole 14 have a distance in the lateral direction (S2 direction) greater than the distance between both sides of staple 22 in the lateral direction. I.e., the width of staple holes 14 is greater than the width of staples 22, ensures that staples 22 can pass completely through staple holes 14 without becoming lodged during the firing of the stapler. Preferably, the projection of the staples 22 on the upper plate of the magazine cover 1 falls within the coverage of the projection of the staple holes 14 on the upper plate of the magazine cover 1, and when the firing block 4 drives the staples 22 to move upwards, the staples 22 can pass through the staple holes 14 more smoothly without being blocked by the wall of the staple holes 14 and without being stuck in the staple holes 14.

As shown in fig. 6, the magazine cover 1 includes two bent portions 18 at both sides of the nail belt 2, i.e., in the view of fig. 6, the left side and the right side of the upper plate of the magazine cover 1 are respectively provided with one bent portion 18. One bent part 18 is connected with the upper plate and the left side plate of the nail bin cover 1, the other bent part 18 is connected with the upper plate and the right side plate of the nail bin cover 1, and the surface of the bent part 18 is a smooth arc surface. In this embodiment, the staple holes 14 are provided in the fold 18 on one side of the magazine cover 1, which is shown only by way of example. And another nail hole is arranged at the position of the upper plate of the nail bin cover 1 close to the right side plate, and the nail hole is completely opened in the upper plate of the nail bin cover 1. In another alternative embodiment, a plurality of nail holes 14 may be respectively disposed at the two bent portions 18, that is, two rows of nail holes 14 disposed in the magazine cover 1 are symmetrical with respect to the center line of the magazine cover 1.

As shown in fig. 7 to 9, the firing block 4 includes a staple pushing portion 42 and a staple cutting portion 41. Upon stapling, the firing block 4 is moved in the direction S1 from the proximal side of the cartridge assembly to the distal side of the cartridge assembly. The staple pushing portion 42 of the firing block 4 first contacts with the crown portion 223 of the staples 22, drives the staple legs 222 of the staples 22 to rotate around the staple connecting portions 221, and extend upward from the staple holes 14, and is closed into a D shape under the action of the staple anvil, the staple pushing portion 42 cuts off the staple connecting portions 221, the staples 22 can be separated from the staple belt body 21, and move upward to pass through the staple holes 14 to be closed on the tissue, and are separated from the staple cartridge cover 1.

As shown in fig. 7 and 8, the inner surface of the cartridge cover 1 is in contact with the upper surface of the cartridge body 21. The height of the staple cutting portion 41 at the top end of the firing block 4 may be lower than or equal to the height of the upper surface of the staple belt 2, and when the firing block 4 moves to the distal end side, the staple cutting portion 41 does not easily drive the staples 22 to be separated from the staple belt body 21 at the staple connecting portions 221, which may cause the staples 22 not to be separated from the staple belt body 21.

Referring to FIGS. 10-12, a staple cartridge assembly according to a second embodiment of the present invention is shown. This embodiment differs from the first embodiment in that a first gap 6 is formed between the upper surface of the cartridge cover and the upper surface of the cartridge body 21. The side surface of the nail belt body 21 facing away from the support 3 is defined as a first surface 211, namely, the upper surface of the nail belt body 21 is defined as the first surface 211, the side surface of the magazine cover 1 opposite to the first surface 211 of the nail belt body 21 is defined as a 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 magazine lid 1 is the inner surface of the upper plate of the magazine lid 1.

The cartridge body 21 is shown in block form in fig. 12, and the body structure of the support 3 is omitted, showing only the mating relationship of the first boss 33, the cartridge body 21 and the cartridge cover 1 by way of example. A first gap 6 is formed between the first surface 211 of the cartridge body 21 and the second surface 13 of the cartridge cover 1, and the height of the first gap 6 is h1. The height h1 of the first gap 6 may take different values depending on the size of the cartridge assembly. As shown in fig. 11, 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 belt body 21, so that the staple cutting portion 41 of the firing block 4 is convenient to drive the staples 22 to be separated from the staple belt 2, and thus, the firing block 4 can ensure that the staples 22 are pushed out towards the anvil and closed on the tissue when the stapler is fired.

In this embodiment, the highest point of the staple cutting portion 41 of the firing block 4 abuts against the second surface 13 of the cartridge cover 1, and the staple cutting portion 41 of the firing block 4 can better drive the staples 22 away from the staple strip 2 by utilizing the first gap 6 to the maximum extent. As shown in fig. 11, 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 strip 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, so that the staples 22 are completely separated from the staple strip body 21 and stapled to the tissue when the stapler is fired.

As shown in fig. 10 to 12, in this embodiment, the surface of the support 3 is provided with at least one first protrusion 33, a height of a side surface of the first protrusion 33 facing away from the support 3 (in this embodiment, an upper surface of the first protrusion 33) is higher than a height of the first surface 211 of the magazine cover 1, a side surface of the first protrusion 33 facing away from the support 3 abuts against the second surface 13 of the magazine cover 1, and the first gap 6 is formed between the first surface 211 of the magazine body 21 and the second surface 13 of the magazine cover 1 by the abutting action of the first protrusion 33. The height of the portion of the first protrusion 33 between the second surface 13 of the cartridge cover 1 and the first surface 211 of the staple strip body 21 is equal to the height h1 of the first gap 6, i.e., the height of the portion of the first protrusion 33 protruding above the first surface 211 of the staple strip body 21.

As shown in fig. 10 and 11, a distance between the inner side surface and the outer side surface of the first protruding portion 33 is smaller than a distance between the inner side surface and the outer side surface of the nail belt body 21, that is, a transverse width of the first protruding portion 33 is smaller than a transverse width of the nail belt body 21, at least one mounting hole 212 is formed in the surface of the nail belt body 21, and the first protruding portion 33 is inserted into the mounting hole 212. In this embodiment, a side surface of the first protruding portion 33 facing away from the staple tape body 21 is parallel to and attached to the second surface 13 of the cartridge cover 1, so that the fitting stability between the first protruding portion 33 and the staple tape body 21 can be enhanced. The first protruding portion 33 may be fixedly connected to the mounting hole 212 by welding, for example, to improve the fitting stability.

As shown in fig. 11, in this embodiment, the first protruding 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 a circular arc guiding surface, and the circular arc guiding surface can better guide the boss into the mounting hole 212 when assembling the nail belt 2 with the support 3. Here, the shape of the first protruding portion 33 is only an example, in other alternative embodiments, the first protruding portion 33 may also take other shapes, for example, the projection of the first protruding portion 33 on the first surface 211 of the nail belt body 21 is rectangular, or triangular, diamond-shaped, trapezoid-shaped, etc., the area of the upper surface of the first protruding portion 33 may also be different from the area of the lower surface, for example, the first protruding portion 33 is a cone structure with a large lower surface area and a small upper surface area, which all fall within the protection scope of the present invention.

In this embodiment, the surface of the support 3 is further provided with two second protrusions 34, the second protrusions 34 are located at the proximal end side and the distal end side of the staple band body 21, the height of one side surface of the second protrusion 34 facing away from the support 3 is higher than the height of the first surface 211 of the staple band body 21, and one side surface of the second protrusion 34 facing away from the support 3 abuts against the second surface 13 of the staple band body 21. The surface of the first protruding portion 33 facing away from the support 3 is at the same height as the surface of the second protruding portion 34 facing away from the support 3. In this embodiment, the lateral width of the second projection 34 is equal to the lateral width of the staple band body 21. The second protruding portion 34 can be fixedly connected with the nail belt body 21 by welding, for example, to improve the fitting stability of the support 3 and the nail belt 2.

In this embodiment, the number and arrangement of the first raised portions 33 can be selected according to requirements, and they can be uniformly or non-uniformly distributed on the surface of the support 3 along the axial direction of the stapler; in another alternative embodiment, the surface of the support 3 may be provided with only the first raised portion 33, and not the second raised portion 34; in a further alternative embodiment, the surface of the support 3 may be provided with only the second bosses 34, without the first bosses 33, in another alternative embodiment, the second bosses 34 may be provided only on the distal side, or only on the proximal side; in a further alternative embodiment, the second boss 34 may also be the same shape and size as the first boss 33.

FIG. 13 is a schematic view of a third embodiment of a staple cartridge assembly according to the present invention. In this embodiment, the third projection 213 is provided directly on the upper surface of the nail belt body 21. The upper surface of the third protrusion 213 abuts against the second surface 13 of the cartridge cover 1 to form a first gap 6 between the first surface 211 of the cartridge 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 upper surface of the third protrusion 213 and the second surface 13 of the cartridge cover 1 are parallel and attached to each other, so as to improve the fitting stability. The shape, size, number and arrangement of the third protrusions 213 can be selected according to the needs, and are not limited to those shown in the drawings. The same objective of facilitating the staple cutting portion 41 of firing block 4 to drive staples 22 away from staple strip 2 is achieved with this embodiment.

FIGS. 14 and 15 illustrate the construction of a cartridge assembly according to a fourth embodiment of the present invention. This embodiment differs from the first embodiment in that: the surface of the support member 3 is not provided with the first protruding portion 33 and the second protruding portion 34, the second surface 13 of the magazine cover 1 is provided with the fourth protruding portion 17 protruding towards the nail belt 2, and one side surface of the fourth protruding portion 17 facing the nail belt body 21 is abutted against the first surface 211 of the nail belt body 21. The height of the fourth protrusion 17 is equal to the height h1 of the first gap 6. In this embodiment, a side surface of the fourth protruding portion 17 facing the nail belt body 21 is a lower surface of the fourth protruding portion 17, and the lower surface of the fourth protruding portion 17 is parallel to the first surface 211 of the nail belt body 21 and is attached to each other, so as to improve the fitting stability. The shape, size, number and arrangement of the fourth convex portions 17 can be selected and set according to the needs, and are not limited to the shapes shown in the figures. The same objective of facilitating the staple cutting portion 41 of the firing block 4 to drive the staples 22 away from the staple strip 2 is achieved with this embodiment.

The protrusions of the second, third and fourth embodiments described above are provided to the support 3, the staple band body 21 and the cartridge cover 1, respectively, to achieve a first gap 6 between the first surface 211 of the staple band body 21 and the second surface 13 of the cartridge cover 1. In other alternative embodiments, the above three embodiments may be combined, for example, two or more of the first protruding portion 33, the second protruding portion 34, the third protruding portion 213 and the fourth protruding portion 17 may be provided at the same time, and all of them fall within the protection scope of the present invention.

Fig. 16 and 17 are schematic views of the cooperation of a fifth embodiment of the staple strip and support of the present invention. This embodiment is similar to the second embodiment in that a first boss 33 and two second bosses 34 are provided on the surface of the support 3. The two second protrusions 34 are located on the distal side 31 and the proximal side 32 of the support 3, the first protrusion 33 is located between the two second protrusions 34, and the upper surfaces of the first protrusion 33 and the second protrusion 34 abut against the second surface 13 of the cartridge cover 1. The fifth embodiment differs from the second embodiment in that: in this embodiment, the cartridge module comprises a plurality of staple strips 2, the plurality of staple strips 2 are arranged along the axial direction of the stapler, and the first protrusions 33 are located 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 most distal staple band 2 and on the proximal side of the most proximal staple band 2, respectively. The first protruding part 33 can be fixedly connected with the nail belt 2 by welding, for example, to improve the stability of the cooperation between the support 3 and the nail belt 2. The second protrusions 34 may also be fixedly connected to the nail belt 2 by welding, for example, to improve the stability of the engagement between the support 3 and the nail belt 2.

As shown in fig. 16 to 17, in this embodiment, the distance between the inner side surface and the outer side surface of the first protruding part 33 is equal to the distance between the inner side surface and the outer side surface of the nail belt body 21, that is, the transverse width of the first protruding part 33 is equal to the transverse width of the nail belt body 21, so that the installation of a plurality of nail belts 2 can be positioned better, and the stability of the nail belts 2 can be maintained better. In other alternative embodiments, the distance between the inner side surface and the outer side surface of the first protruding part 33 may be smaller than the distance between the inner side surface and the outer side surface of the nail belt body 21, for example, the shape and the size of the first protruding part 33 as in the second embodiment may be adopted, and the invention is also within the protection scope.

Many variations of this fifth embodiment are possible and fall within the scope of the invention. The number, size, shape and arrangement of the first and second convex portions 33 and 34 in the fifth embodiment are not limited to those shown in the drawings. The length of the nail belt 2 along the axial direction of the stapler and the number of the nail belts 2 are not limited to those shown in the figures, and can be selectively adjusted as required. In an alternative embodiment, only the first projection 33 may be provided, without the second projection 34.

FIG. 18 is a partial schematic structural view of a staple cartridge assembly according to a sixth embodiment of the present invention. This embodiment differs from the first embodiment in that: the distal end and the proximal end of the second hole wall 142 of the nail hole 14 are respectively provided with a concave arc 1421, and the lowest point of the concave arc 1421 is lower than the height of the second hole wall 142. While the second hole wall 142 of one nail hole 14 is exemplarily shown to be provided with the concave arcs 1421 in fig. 18, in other embodiments, all the second hole walls 142 of the nail holes 14 may be provided with the concave arcs 1421, or some of the second hole walls 142 of the nail holes 14 may be provided with the concave arcs 1421. By providing concave arcs 1421, staples 22 are more easily removed from staple holes 14 after formation. 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, so as to prevent the staple connecting portion 221 from being completely exposed out of the staple hole 14, and improve the stability of the staple 22 in the staple hole 14 when the stapler is unfired.

Fig. 19 and 20 exemplarily show the structure in which the cartridge cap and the staples are engaged. To more clearly illustrate the cooperation of the cartridge cover and the staples, the cartridge cover in fig. 19 and 20 is in a perspective form and the buttress and the staple strip body are omitted. The form of fitting of the cartridge cover and the staples in fig. 19 and 20 may be applied to any of the first to sixth embodiments described above, that is, may be applied to the fitting of the cartridge cover 1 and the staples 22 using the staple holes 14 (without the concave arcs 1421) of the first to fifth embodiments, and may also be applied to the fitting of the cartridge cover 1 and the staples 22 using the staple holes 14 (with the concave arcs 1421) of the sixth embodiment.

As shown in fig. 19, in the initial state, legs 222, nail arcs 223, and barbs 2231 of staples 22 are all lower in height than second hole wall 142 of nail holes 14, and nail connecting portions 221 have a highest point higher than second hole wall 142 of nail holes 14 but lower than a highest point of first hole wall 141 of nail holes 14. The lowest point of the nail connecting portion 221 is lower than the second hole wall 142 of the nail hole 14. In embodiments having a concave arc 1421, the lowest point of the nail connection 221 is lower than the lowest point of the concave arc 1421. As shown in fig. 20, after staple 22 is closed, staple crown 223 is rotated to a position in the axial direction, and second hole wall 142 is higher than the lowest point of staple crown 223, so that staple crown 223 forms a lateral stop to ensure that staple 22 does not shift outward during pushing staple hole 14 upward.

In each of the above embodiments, the nail belt 2 is made of a biocompatible material, such as a nail belt 2. In a preferred embodiment, the strip body 21 and the staples 22 may be made of different materials, for example, in some embodiments, the strip body 21 is made of non-absorbable and non-degradable materials such as titanium, titanium alloy and stainless steel, and the staples may be biocompatible staples made of degradable materials or biodegradable and bioabsorbable staples, and after the staples 22 are sutured on the tissue, the subsequent staple removing operation is not required. For example, the staples 22 may be made of magnesium, magnesium alloy, degradable polymer material, etc., but the present invention is not limited thereto. Further, the surface of staple 22 may also be coated with a degradable and bioabsorbable biocompatible coating. The coating may further increase the stiffness of staples 22 and may regulate the rate of degradation of staples 22. The coating may be, for example, an absorbable material, such as a coating of levorotatory polylactic acid (PLLA) and/or racemic polylactic acid (PDLLA), although the invention is not limited thereto. The overall degradation rate of staple 22 may be adjusted by adjusting the thickness of the coating. Or the coating can be a medicament with a blood coagulation effect and the like, and can improve bleeding and the like in the anastomosis process. In other embodiments, the surface of staple 22 may be provided with a magnetic coating that is magnetized upon the application of an external magnetic field, which may have the effect of enhancing the strength of the anastomosis. The external magnetic field can be an electromagnetic field, and the magnetic field intensity can be adjusted to meet the requirement of anastomosis; or a permanent magnetic field.

In conclusion, the staple cartridge assembly and the medical anastomat provided by the invention have the following advantages:

the invention provides a nail bin assembly for a medical anastomat, wherein a nail hole is formed in the bent part of a nail bin cover, the height of a second hole wall is lower than that of a first hole wall, and the height of part of the nail hole sinks, so that an anastomotic nail is easier to separate from the nail bin cover after being closed, and the operation effect is improved.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.

Claims (24)

1. A staple cartridge assembly for use with a medical stapler, said staple cartridge assembly comprising:

a staple strip including at least one staple strip body and a plurality of staples rotatably connected to the staple strip body by staple connections;

the nail bin cover is sleeved outside the nail belt body and comprises a bending part extending along the axial direction of the anastomat, a plurality of nail holes are formed in the bending part and comprise a first hole wall and a second hole wall extending along the axial direction of the anastomat, and the height of the first hole wall is higher than that of the second hole wall.

2. The staple cartridge assembly according to claim 1, wherein said bent portion is connected between an upper plate and a side plate of said staple cartridge cover, said staple hole comprises a first section and a second section which are connected, said first section of said staple hole is disposed on said upper plate of said staple cartridge cover, said second section of said staple hole is disposed on said side plate of said staple cartridge cover, said first hole wall is disposed on a side of said first section of said staple hole away from said second section, and said second hole wall is disposed on a side of said second section of said staple hole away from said first section.

3. The staple cartridge assembly of claim 2, wherein said first aperture wall is parallel to a side plate of said cartridge cover and said second aperture wall is parallel to an upper plate of said cartridge cover.

4. The staple cartridge assembly of claim 2, wherein a height of a highest point of said staple connections is less than a height of a highest point of said first aperture walls of said staple apertures.

5. The staple cartridge assembly of claim 2, wherein a height of a lowest point of said staple connections is lower than a height of a highest point of a second hole wall of said staple holes.

6. The staple cartridge assembly of claim 2, wherein a projection of said staple connecting portions on a side plate of said cartridge cover at least partially coincides with a projection of said staple apertures on a side plate of said cartridge cover.

7. The cartridge assembly of claim 2, wherein a distance in the transverse direction between the first and second walls of the staple hole is greater than a distance in the transverse direction between the sides of the staple.

8. The staple cartridge assembly of claim 7, wherein a projection of said staples on said upper plate of said cartridge cover falls within a coverage of a projection of said staple apertures on said upper plate of said cartridge cover.

9. The staple cartridge assembly of claim 2, wherein said second aperture wall has a concave arc at a distal end and a proximal end, a lowest point of said concave arc being lower than a height of said second aperture wall.

10. The staple cartridge assembly of claim 2, wherein said staple cartridge cover comprises two said folds on either side of said staple strip, each of said folds being provided with a plurality of said staple holes.

11. The staple cartridge assembly of claim 1, wherein the surface of said bend is a smooth arcuate surface.

12. The cartridge assembly of claim 1, further comprising a buttress, wherein during rotation of the staples, side walls of the staples simultaneously abut the buttress and an inner sidewall wall of the staple cartridge cover at least partially.

13. The cartridge assembly of claim 12, wherein the staples further comprise staple crown portions connected to the staple connecting portions, the staple crown portions being rotated to an axial direction after the staples are closed and formed, the second aperture walls being higher than the lowest points of the staple crown portions.

14. The staple cartridge assembly of claim 13, wherein said staple crown portion is provided with barbs, and wherein said second aperture wall is disposed higher than said barbs in an initial rotated state.

15. The staple cartridge assembly of claim 12, further comprising a firing block, said staple belt body mounted to one side of said support, said staple belt body comprising a first surface facing away from said support;

the cartridge cover comprises a second surface opposite to the first surface of the staple belt body, and a first gap is formed between the first surface of the staple belt body and the second surface of the cartridge cover;

the triggering block is movably arranged at the bottom of the staple bin cover and can move along the axial direction of the anastomat, the triggering block comprises 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 belt body.

16. The staple cartridge assembly of claim 15, wherein a lowest point of said staple cutting portion of said firing block has a height that is lower than a height of said first surface of said staple strip body, said staple cutting portion of said firing block being at least partially aligned with said staple connecting portion in an axial direction of said stapler.

17. The staple cartridge assembly of claim 15, further comprising at least one protrusion located at least partially between the first surface of the staple band body and the second surface of the cartridge cover, wherein the height of the portion of the protrusion located between the first surface of the staple band body and the second surface of the cartridge cover is equal to the height of the first gap.

18. The staple cartridge assembly of claim 17, wherein a surface of said support is provided with at least one first protrusion, wherein a side surface of said first protrusion facing away from said support is at a higher elevation than a first surface of said staple band body, and wherein a side surface of said first protrusion facing away from said support abuts a second surface of said cartridge cover.

19. The staple cartridge assembly of claim 18, wherein a distance between an inner side surface and an outer side surface of said first protrusion is less than a distance between an inner side surface and an outer side surface of said staple band body, wherein at least one mounting hole is disposed on a surface of said staple band body, and wherein said first protrusion is inserted into said mounting hole.

20. The staple cartridge assembly of claim 18, wherein said staple cartridge assembly comprises a plurality of staple strips aligned in an axial direction of said stapler, said first protrusions being located between staple strip bodies of two adjacent said staple strips.

21. The staple cartridge assembly of claim 17, wherein the first surface of the staple band body is provided with at least one third protrusion, and a side surface of the third protrusion facing away from the staple band body abuts the second surface of the staple cartridge cover; and/or a fourth bulge portion protruding towards the nail belt is arranged on the second surface of the nail bin cover, and the fourth bulge portion abuts against the first surface of the nail belt body and faces one side surface of the nail belt body.

22. The staple cartridge assembly of claim 1, wherein said staples are degradable biocompatible staples; and/or the staples are bioabsorbable biocompatible staples.

23. The cartridge assembly of claim 1, wherein a surface of said staples is provided with a degradable and bioabsorbable biocompatible coating; and/or the surface of the anastomosis nail is provided with a magnetic coating, and the anastomosis nail is magnetized under the action of an external magnetic field.

24. A medical stapler comprising the cartridge assembly of any one of claims 1-23.

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