CN115919393A

CN115919393A - Nail bin assembly and medical anastomat

Info

Publication number: CN115919393A
Application number: CN202111058194.7A
Authority: CN
Inventors: 丁水澄
Original assignee: Suzhou Tianchen International Medical Technology Co Ltd
Current assignee: Suzhou Tianchen International Medical Technology Co Ltd
Priority date: 2021-09-09
Filing date: 2021-09-09
Publication date: 2023-04-07
Anticipated expiration: 2041-09-09
Also published as: CN115919393B; WO2023036222A1

Abstract

The invention provides a nail bin assembly and a medical anastomat, wherein the nail bin assembly comprises: the nail bin comprises a nail bin body, wherein a nail bin surface is arranged on the surface of one side of the nail bin body, a plurality of nail holes are formed in the nail bin surface, and a first matching part is arranged on the inner wall of at least one side of each nail hole; the anastomosis nails are positioned inside the nail holes and comprise connecting parts, the connecting parts are provided with second matching parts, and the second matching parts and the first matching parts form relatively rotatable embedded matching; and when the firing block moves from the proximal end side to the distal end side of the nail bin, the firing block drives the staples, so that the second matching parts of the staples rotate relative to the first matching parts and are separated from the first matching parts. The matching structure of the nail bin and the anastomosis nails is simple, and the anastomosis nails are easy to separate from the nail bin when the anastomat is triggered.

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 can 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. A plurality of anastomotic nails are arranged in the nail bin assembly. When the anastomat is fired, the anastomat nail is pushed out towards the nail anvil through the firing block, and the nail anvil is closed to be formed so as to suture the tissue. However, when the stapler is fired, the staples may be stuck and cannot be separated from the staple cartridge, which may affect the operation effect.

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 state 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 nail bin assembly and a medical anastomat.

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

the nail bin comprises a nail bin body, wherein a nail bin surface is arranged on the surface of one side of the nail bin body, a plurality of nail holes are formed in the nail bin surface, and a first matching part is arranged on the inner wall of at least one side of each nail hole;

the anastomosis nail comprises a connecting part, a second matching part is arranged on the connecting part, and the second matching part and the first matching part form relatively rotatable embedded matching;

a firing block that drives the staples as the firing block moves from a proximal side to a distal side of the staple cartridge such that the second mating portions of the staples rotate relative to and disengage from the first mating portions.

In some embodiments, the first matching portion is a rotating shaft, and the second matching portion is a mounting hole which forms an embedded fit with the rotating shaft; or, the second cooperation portion is the pivot, first cooperation portion for with the pivot forms to inlay establishes the complex mounting groove.

In some embodiments, the staples have a first state and a second state, the staples rotate relative to the cartridge to the second state while the staples are in the first state and the firing block drives the staples to rotate; the staple is in the second state, and when the firing block drives the staple to move upwards, the second matching part of the staple can be separated from the first matching part.

In some embodiments, the staple further includes a leg and a crown, the crown is located between the leg and the connecting portion, when the staple is in the first state, the leg and the connecting portion are respectively located at two ends of the staple hole, and when the staple is in the second state, the leg and the connecting portion are located at the same end of the staple hole.

In some embodiments, the first mating portion is a first rotating shaft, and the second mating portion is a mounting hole with an opening on one side;

the anastomotic nail is in the second state, and when the firing block drives the anastomotic nail to move upwards, the mounting hole is separated from the first rotating shaft at the opening.

In some embodiments, the opening direction of the mounting hole is a direction toward a proximal end side of the stapler when the staple is in the first state, and the opening direction of the mounting hole is a downward direction when the staple is in the second state.

In some embodiments, the first rotating shaft comprises two first outer walls arranged oppositely and two second outer walls arranged oppositely, wherein the two second outer walls are respectively positioned at two ends of the first outer walls and are respectively connected between the two first outer walls;

when the staple is in the first state, the opening of the mounting hole is opposite to the first outer wall, and when the staple is in the second state, the opening of the mounting hole is opposite to the second outer wall.

In some embodiments, the second outer wall is a radiused surface.

In some embodiments, a farthest distance between the two first outer walls is smaller than an opening distance of the mounting hole, and a farthest distance between the two second outer walls is larger than the opening distance of the mounting hole.

In some embodiments, the height of the highest point of the first fulcrum is less than the height of the staple cartridge face.

In some embodiments, the first outer wall is disposed perpendicular to the axial direction.

In some embodiments, the mounting hole is a blind hole formed in a side wall of the connecting portion, or the mounting hole is a through hole penetrating through two side walls of the connecting portion.

In some embodiments, the second mating portion is a second shaft and the first mating portion is a recess communicating with the staple cartridge face.

In some embodiments, the second rotating shafts are respectively disposed on two sides of the connecting portion, the grooves are respectively disposed on two inner walls of the nail hole, and the two second rotating shafts are coaxially disposed.

In some embodiments, the staple and the second rotating shaft are integrally formed, or the rotating shaft is fixedly embedded in a connecting portion of the staple.

In some embodiments, the bottom surface of the groove is a radiused surface.

In some embodiments, the staple further comprises a leg and a crown, the crown being located between the connection portion and the leg, the leg and the connection portion being located at respective distal and proximal ends of the staple hole when the staple is in the first state;

the cartridge face comprises a first region and a second region, the first region having a height that is higher than a height of the second region to form an upwardly convex protrusion relative to the second region;

the boss is located at least partially on a distal side of the tack hole.

In some embodiments, the protruding part is provided with a nail foot groove communicated with the nail hole, and the nail foot is positioned in the nail foot groove;

when the anastomosis nail is in the first state, the height of the highest point of the nail foot is lower than the surface height of the bulge.

In some embodiments, the height of the highest point of the legs is higher than the surface height of the second region when the staple is in the first state.

In some embodiments, the region of the staple cartridge face corresponding to the staple legs and the connecting portions is the first region, and the region of the staple cartridge face corresponding to the staple crowns is the second region.

In some embodiments, when the staple is in the first state, the highest point height of the connecting portion and the highest point height of the staple leg are both higher than the surface height of the second region and lower than the surface height of the first region.

In some embodiments, a side of the distal end of the staple hole facing away from the staple cartridge surface is provided with a staple abutting portion, and the staple abuts against the staple abutting portion at least partially during rotation of the staple.

In some embodiments, the bottom of the staple abutting portion is weakly connected with the staple cartridge, and when the firing block moves distally beyond the staple abutting portion, the tail end of the staple abutting portion is folded back in the distal direction without departing from the staple cartridge.

In some embodiments, an avoiding portion is arranged on one side of the nail bin, which faces away from the nail bin surface, the avoiding portion is located at the far end of the nail abutting portion, and when the nail abutting portion is folded towards the far end direction, at least part of the nail abutting portion enters the avoiding portion.

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 bin and anastomosis nails form relatively rotatable and separable matching through a first matching part and a second matching part, the matching structure of the nail bin and the anastomosis nails is simple, and the anastomosis nails are driven by a firing block to rotate and separate from the nail bin when the anastomat is fired, so that the condition that the anastomosis nails cannot be separated from the nail bin due to being clamped is avoided, 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 exploded view of the staple cartridge assembly of the first embodiment of the present invention;

FIG. 3 is an enlarged view taken at A1 in FIG. 2;

fig. 4 and 5 are schematic views of the engagement of the staple and the first shaft of the first embodiment of the present invention;

FIG. 6 is a schematic structural view of a firing block of the first embodiment of the present invention;

fig. 7 and 8 are schematic views of the engagement of a second embodiment staple of the present invention with a first spindle;

FIG. 9 is a schematic cross-sectional view of a rotating shaft according to a second embodiment of the present invention;

FIG. 10 is a schematic structural view of a staple cartridge assembly according to a third embodiment of the present invention;

FIG. 11 is an exploded view of a staple cartridge assembly of a third embodiment of the present invention;

FIG. 12 is an enlarged view at A2 in FIG. 11;

FIG. 13 is a schematic structural view of a staple in accordance with a third embodiment of the present invention;

FIG. 14 is a top view of a staple cartridge assembly of a third embodiment of the present invention;

FIG. 15 is a sectional view taken in the direction B1-B1 in FIG. 14;

FIG. 16 is a sectional view taken in the direction B2-B2 in FIG. 14;

FIG. 17 is a schematic structural view of a staple cartridge assembly according to a fourth embodiment of the present invention;

FIG. 18 is an enlarged view taken at A3 in FIG. 17;

FIG. 19 is a schematic structural view of a staple cartridge assembly according to a fifth embodiment of the present invention;

FIG. 20 is an enlarged view at A4 in FIG. 19;

FIG. 21 is a top view of a staple cartridge assembly of a fifth embodiment of the present invention;

fig. 22 is a sectional view in the direction B3-B3 in fig. 21.

Reference numerals are as follows:

1. nail pushing part of nail bin 16

11. The magazine surface 17 avoiding part

111. First region 2 staple

112. Second region 21 connection

12. Nail hole 211 mounting hole

13. First rotating shaft 212

131. First outer wall 22 nail foot

132. Second outer wall 23 crown

14. Groove 3 nail bin cover

141. Groove bottom surface 4 percussion block

15. The protruding part 41 pushes the nail part

151. Nail foot groove

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, a repetitive description thereof will be omitted.

The invention provides a nail bin assembly for a medical anastomat and the medical anastomat comprising the same. The medical stapler generally includes an instrument platform, a firing handle movably connected to the instrument platform, and a staple head mounted to the instrument platform. The nail head comprises a nail bin assembly and a nail anvil which are oppositely arranged. The cartridge assembly includes a plurality of staples, a cartridge for receiving the staples, and a firing block for driving the staples. The surface of one side of the nail bin is a nail bin surface, and a plurality of nail holes are formed in the nail bin surface. The inner wall of at least one side of the nail hole is provided with a first matching part. The anastomosis nail is located inside the nail hole and comprises a connecting portion, the connecting portion is provided with a second matching portion, and the second matching portion and the first matching portion form embedding matching capable of rotating relatively. When the firing block moves from the proximal end side to the distal end side of the nail cabin, the firing block drives the staples, so that the second matching parts of the staples rotate relative to the first matching parts and are separated from the first matching parts. Therefore, the nail bin and the anastomosis nails are in relative rotation and separable fit through the first matching portion and the second matching portion, the matching structure of the nail bin and the anastomosis nails is simple, and the anastomosis nails are driven by the firing block to rotate and separate from the nail bin when the anastomat is fired, so that the condition that the anastomosis nails cannot be separated from the nail bin due to being clamped is avoided, 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 scope of the present invention is not limited by the embodiments.

FIGS. 1 to 6 are schematic structural views of a nail magazine assembly according to a first embodiment of the present invention. As shown in fig. 1 and 2, in a first embodiment, the cartridge assembly includes a plurality of staples 2, a cartridge 1 for receiving the staples 2, and a firing block 4 for driving the staples 2. Wherein, one side surface of the nail bin 1 is a nail bin surface 11 (in the view angle of fig. 1, the upper surface of the nail bin 1 is the nail bin surface 11). The nail bin assembly further comprises a nail bin cover 3 located below the nail bin 1, the nail bin cover 3 is combined with the nail bin 1, specifically, the nail bin cover 3 comprises a bottom surface and two side walls, the bottom surface is opposite to the nail bin surface 11, the two side walls are located on two sides of the nail bin 1, and the two side walls of the nail bin cover 3 can be connected with the nail bin 1 in a clamped mode or in a welded mode. Forming a cavity that receives the staples 2. The firing block 4 and the plurality of staples 2 are all received in the cavity. The nail bin surface 11 is provided with a plurality of nail holes 12, the nail holes 12 can be divided into a plurality of rows, each row of the nail holes 12 is arranged along the axial direction of the anastomat, and the nail holes 12 in two adjacent rows are arranged in a staggered mode. The staples 2 are located inside the staple holes 12. Two rows of staples 2 are shown in fig. 2 by way of example only. The firing block 4 is at least partially located in the staple cartridge 1, and in an initial state, the firing block 4 is located on the proximal side of the staple cartridge 1, and the firing block 4 can move from the proximal side to the distal side of the staple cartridge 1 when the stapler is fired.

As shown in fig. 3 and 4, at least one side of the nail hole 12 is provided with a first fitting portion on an inner wall thereof. The staple 2 includes a connection portion 21, a leg 22, and a crown 23, the crown 23 being located between the connection portion 21 and the leg 22, and the leg 22 being located at a distal end side of the connection portion 21. After the stapler is fired, when the staples 2 are closed and formed on the tissue, the legs 22 of the staples 2 approach the connecting parts 21 to be integrally closed into a D shape. When the staple 2 is in the second state, the leg 22 of the staple 2 and the connecting portion 21 are located at the same end of the staple hole 12, and when the staple 2 is in the second state, the leg 22 of the staple 2 and the connecting portion 21 are located at the right end of the staple hole 12 in the viewing angle of fig. 2. When the staple 2 is installed in the staple hole 12, the connecting portion 21 and the staple leg 22 of the staple 2 correspond to the proximal end and the distal end of the staple hole 12, respectively, and the crown 23 of the staple 2 corresponds to the middle of the staple hole 12. The connecting portion 21 is provided with a second matching portion, and the second matching portion and the first matching portion form relatively rotatable embedding matching. In this embodiment, the first engagement portion is a first rotating shaft 13 provided on an inner wall of the nail hole 12, and the second engagement portion is a mounting hole 211 provided on the connecting portion 21.

The staples 2 have a first state and a second state, fig. 4 and 5 show the first state and the second state of the staples 2, respectively, and the cooperation of the staples 2 with the first rotary shaft 13 in different states. As shown in fig. 4, in the initial state, the staple 2 is in the first state, the first rotating shaft 13 is embedded in the mounting hole 211, and the diameter of the mounting hole 211 is larger than that of the first rotating shaft 13, so that the staple 2 can rotate around the first rotating shaft 13. The mounting hole 211 has an opening at one side. When the staple 2 is in the first state, the opening direction of the mounting hole 211 is a direction from the distal end side to the proximal end side of the stapler, that is, the mounting hole 211 opens in the S1 direction. As shown in fig. 6, the firing block 4 includes a staple pushing portion 41 for driving the staples 2. When the stapler is fired, when the firing block 4 moves from the proximal end side to the distal end side of the staple cartridge 1, the staple pushing portion 41 of the firing block 4 contacts the crown 23 of the staple 2 and drives the staple 2 to rotate (in the view angle of fig. 4, the staple leg 22 of the staple 2 rotates clockwise), and the staple leg 22 of the staple 2 protrudes out of the staple hole 12 and is gradually closed to the connecting portion 21 under the action of the anvil, so that the staple 2 reaches the second state shown in fig. 5.

As shown in fig. 5, when the staple 2 is in the second state, the opening direction of the mounting hole 211 is directed downward. When the firing block 4 continues to move from the proximal end side to the distal end side of the staple cartridge 1, the staple pushing portion 41 of the firing block 4 continues to drive the staples 2, the firing block 4 drives the staples 2 to move upwards, and the mounting holes 211 of the staples 2 can be separated from the first rotating shaft 13 at the openings because the opening directions of the mounting holes 211 are downward. Therefore, the cartridge 1 and the staples 2 in the invention form a relatively rotatable and rotatable separable fit through the embedded combination of the first rotating shaft 13 and the mounting holes 211, the fit structure of the cartridge 1 and the staples 2 is simple, and when the stapler is fired, the staples 2 are driven by the firing block 4 to rotate and separate from the cartridge 1, so that the situation that the staples 2 are clamped and cannot be separated from the cartridge 1 is avoided, and the operation effect is improved.

In the present invention, the distal end side and the proximal end side are, with respect to the operator, the end closer to the operator is the proximal end side, the end farther from the operator, i.e., the end closer to the operation state is the distal end side, and the direction along the axial center of the stapler is the axial direction, i.e., the direction from the distal end side to the proximal end side of the stapler, or the direction from the proximal end side to the distal end side of the stapler. For example, in the view of fig. 1, for the cartridge 1, the distal side is the left side and the proximal side is the right side. The S1 direction is a direction from the distal end side to the proximal end side of the stapler, the S1 direction or a direction opposite to the S1 direction is defined as the axial direction of the stapler, the S2 direction in fig. 14 is defined as the width direction, and the S3 direction in fig. 15 is defined as the height direction, i.e., the up-down direction.

As shown in fig. 3, in this embodiment, the highest point of the first rotation shaft 13 has a height lower than the height of the cartridge surface 11, and the connection portions 21 of the staples 2 do not protrude from the surface of the cartridge surface 11 in the first state. In the first state, the height of the highest point of legs 22 of staples 2 is also lower than the height of cartridge surface 11, so that legs 22 of staples 2 do not protrude beyond the surface of cartridge surface 11 either. Thus, when the staples 2 are in the first state, the entire staple 2 is located inside the staple holes 12, avoiding scratching of the tissue when in contact with the tissue.

As shown in fig. 2 to 4, in this embodiment, the mounting hole 211 is a through hole penetrating through both side walls of the connecting portion 21, and the first rotating shaft 13 communicates with both side inner walls of the nail hole 12, that is, the length of the first rotating shaft 13 in the S2 direction is substantially equal to the distance between both side inner walls of the nail hole 12. In another alternative embodiment, the mounting hole 211 may be a blind hole opened on one or both sidewalls of the connecting portion 21. The length of the first rotating shaft 13 in the S2 direction may be smaller than the distance between the inner walls of the nail holes 12 on both sides. The first rotating shaft 13 may be disposed on only one side, or both sides may be disposed with the first rotating shaft 13.

As shown in fig. 3 to 5, in this embodiment, the mounting hole 211 is a circular hole, and the first rotating shaft 13 is a cylindrical rotating shaft 212. In other alternative embodiments, the mounting hole 211 may also be an elliptical hole, or a hole with a partially curved surface and a partially straight surface, and the first rotating shaft 13 may also be a cylinder with another shape, such as an elliptical shape, a rounded rectangle, a fan shape, a semicircular shape, and the like.

Fig. 7 to 9 are schematic views showing the structure of the engagement of the staple 2 and the first rotary shaft 13 according to the second embodiment of the present invention. Fig. 7 and 8 show the structure of the staple 2 of this second embodiment in cooperation with the first rotary shaft 13 in the first state and in the second state, respectively. Fig. 9 shows a sectional structure of the first rotating shaft 13 in this second embodiment. This embodiment differs from the first embodiment in that the shape of the first rotation shaft 13 is different. The first rotating shaft 13 includes two first outer walls 131 and two second outer walls 132, wherein the two first outer walls 131 are opposite to each other, and the two second outer walls 132 are respectively located at two ends of the first outer walls 131 and are respectively connected between the two first outer walls 131. As shown in fig. 7, when the staple 2 is in the first state, the opening direction of the mounting hole 211 is a direction from the distal end side to the proximal end side of the stapler, and the opening of the mounting hole 211 is opposed to the first outer wall 131. As shown in fig. 8, when the staple 2 is in the second state, the opening direction of the mounting hole 211 is directed downward, and the opening of the mounting hole 211 faces the second outer wall 132. In this embodiment, the first outer wall 131 is arranged perpendicular to the axial direction of the stapler. Therefore, in the view of fig. 9, the two first outer walls 131 are left and right side walls of the first rotating shaft 13, and the two second outer walls 132 are upper and lower side walls of the first rotating shaft 13.

As shown in fig. 7 to 9, in this embodiment, the second outer wall 132 is a rounded surface to cooperate with the mounting hole 211, and the second outer wall 132 guides the rotational movement of the staple 2 when the staple 2 is rotated from the first state to the second state.

As shown in fig. 9, the distance between the two first outer walls 131 is w3, the distance between the two second outer walls 132 is w2, and w3 is smaller than w2. Also, as shown in fig. 7, a distance w2 between the two second outer walls 132 is greater than an opening distance w1 of the mounting hole 211, so as to ensure stability of the engagement of the staple 2 with the first rotary shaft 13 in the first state and prevent the mounting hole 211 of the staple 2 from being separated from the first rotary shaft 13 when the stapler is unfired. As shown in fig. 8, the farthest distance w3 between the two first outer walls 131 is smaller than the opening distance w1 of the mounting hole 211, so that when the staple 2 is in the second state, the staple 2 can move upward to be disengaged at the opening of the first rotating shaft 13 by the staple pushing portion 41 of the firing block 4.

Referring to FIGS. 10-16, a third embodiment of a staple cartridge assembly according to the present invention is shown. A first difference of this embodiment from the first embodiment is that the first fitting portion and the second fitting portion are different in structure from the first embodiment. As shown in fig. 10 to 13, in the third embodiment, the second matching portion is the second rotating shaft 212 disposed on one side wall of the connecting portion 21, and the first matching portion is the groove 14 communicated to the magazine surface 11. In this embodiment, the staples 2 are integrally formed with the second shaft 212. In another alternative embodiment, the second rotating shaft 212 may also be fixedly embedded in the connecting portion 21 of the staple 2, so that the second rotating shaft 212 and the connecting portion 21 form a non-rotatable connection, that is, when the staple 2 rotates, the second rotating shaft 212 is driven to rotate, for example, an interference fit is formed between the second rotating shaft 212 and the connecting portion 21. When the staples 2 are in the first state, the second rotating shaft 212 enters the groove 14, and the height of the highest point of the second rotating shaft 212 is lower than the height of the cartridge surface 11, and the height of the highest point of the staple leg 22 of the staple 2 is also lower than the height of the cartridge surface 11. After the staple 2 is rotated to the second state, the second rotating shaft 212 may move upward to be separated from the upper end opening of the groove 14 and the groove 14 under the action of the staple pushing portion 41 of the firing block 4.

In this embodiment, as shown in fig. 15, the distal end of the staple hole 12 facing away from the staple cartridge face 11 is provided with a staple abutting portion 16. In the initial state, the legs 22 of the staples 2 are at least partially abutted against the staple abutting portion 16. The staple 2 at least partially abuts against the staple abutting portion 16 during rotation, and preferably, the shape of the staple abutting portion 16 is adapted to the shape of the staple leg. The staple supporting part 16 enables the staple legs 22 of the staples 2 to be always supported and limited in the rotation process of the staples 2, and can smoothly extend out of the staple holes 12, and the staples 2 are kept from excessively deviating towards the far end direction in the rotation process. Preferably, the bottom of the staple abutting portion 16 is weakly connected to the staple cartridge 1, when the firing block 4 moves distally beyond the staple abutting portion 16, the end of the staple abutting portion 16 (i.e., the lower end of the staple abutting portion 16 shown in fig. 15) is folded back in the distal direction without departing from the staple cartridge 1, so as to avoid blocking the rotational movement of the staples 2, and the staple abutting portion 16 does not leave the staple cartridge 1 and enter the human body. The bottom of the nail pushing part 16 is the side connected with the nail bin.

Further, as shown in fig. 15, an avoiding portion 17 is disposed on a side of the staple cartridge 1 away from the staple cartridge surface 11, the avoiding portion 17 is located at a distal end of the staple abutting portion 16, and when the staple abutting portion 16 is folded towards the distal end direction, at least a part of the staple abutting portion enters the avoiding portion 17. Fig. 15 only shows an avoiding portion 17 at the distal end of the first distal end staple abutting portion 16 by way of example, and the distal ends of the other avoiding portions 16 may also be provided with the avoiding portion 17, so that the staple abutting portion 16 is folded in the distal direction by the force of the staples 2, and the folding of the staple abutting portion 16 is buffered to a certain extent, so as to prevent the staple abutting portion 16 from being broken at the connection with the staple cartridge 1. The escape part 17 may be a groove located at the distal end of the nail abutting part 16. When the firing block 4 moves to the far end and passes over the nail abutting part 16, the nail abutting part 16 can be retracted into the retracting part 17, and the movement of the firing block 4 is not hindered.

The structure of the staple abutting portion 16 and the relief portion 17 shown in fig. 15 can also be applied to the first and second embodiments, that is, the staple abutting portion 16 is provided on the side of the distal end of the staple hole 12 facing away from the cartridge surface 11 in the first and/or second embodiment, and the staple leg 22 of the staple 2 abuts against the staple abutting portion 16 in the initial state. The staples 2 at least partially abut against the staple abutting portion 16 during rotation. Preferably, the bottom of the staple abutting portion 16 is weakly connected to the staple cartridge 1, and when the firing block 4 moves distally beyond the staple abutting portion 16, the tip of the staple abutting portion 16 is folded back in the distal direction without departing from the staple cartridge 1. In the first embodiment and/or the second embodiment, an avoiding portion 17 may be disposed on a side of the staple cartridge 1 away from the staple cartridge surface 11, the avoiding portion 17 is located at a distal end of the staple abutting portion 16, and when the staple abutting portion 16 is folded in a distal direction, at least a part of the staple abutting portion enters the avoiding portion 17. Specifically, the weak connection between the bottom of the nail abutting portion 16 and the nail cartridge 1 may be a weak connection formed by breaking points at the bottom of the nail abutting portion 16, or the like.

As shown in fig. 16, when the staples 2 are not driven to move upward by the firing block 4, the second shafts 212 of the staples 2 fall into the bottom of the recesses 14. In this embodiment, the bottom surface 141 of the groove 14 is a rounded surface to guide the rotational movement of the staple 2 from the first state to the second state.

As shown in fig. 11, 12 and 15, the second difference between the third embodiment and the first embodiment is that the cartridge face 11 is different in structure. In the third embodiment, the cartridge face 11 includes a first region 11 and a second region 12, the height of the first region 11 is higher than the height of the second region 12, so as to form a protruding portion 15 protruding upward relative to the second region 12, that is, the cartridge face 11 at a position where the protruding portion 15 is provided belongs to the first region 11, and the cartridge face 11 at a position where the protruding portion 15 is not provided belongs to the second region 12. When the staple 2 is in the first state, the positions of the staple leg 22 and the connecting portion 21 correspond to the distal end and the proximal end of the staple hole 12, respectively. The region of the magazine surface 11 corresponding to the staple legs 22 and the connecting portions 21 is the first region 11, and the region of the magazine surface 11 corresponding to the crown 23 is the second region 12. Further, the convex portion 15 is provided with a leg groove 151 at a position corresponding to the leg 22, the leg groove 151 is communicated with the leg hole 12, the leg 22 is located in the leg groove 151, so that when the staple 2 is in the first state, the highest point heights of the leg 22 and the connecting portion 21 are both lower than the surface height of the convex portion 15, and the highest point heights of the leg 22 and the connecting portion 21 are both higher than the height of the second region 12.

In this embodiment, the protruding portion 15 is provided, so that the staple cartridge surface 11 is in a concave-convex structure, when the staple cartridge assembly and the staple anvil clamp tissue, friction force to the tissue is improved, and the tissue is prevented from slipping to the distal side in the operation process. The upper surface of the convex part 15 is a plane, and each side surface of the convex part 15 is a smooth surface with a round angle, so that damage to tissue when the convex part is in contact with the tissue is avoided. In addition, by arranging the convex part 15, the area of the nail bin surface 11 corresponding to the nail foot 22 and the connecting part 21 is a high surface, when the anastomat is not fired, the nail foot 22 and the connecting part 21 can be better hidden in the hole of the nail bin 1, and the tissue is prevented from being scratched due to the contact with the tissue. And the cartridge face 11 is a low surface in the area corresponding to the crown 23, when the cartridge assembly and the anvil clamp tissues, more sinking space is provided for the tissues, and the tissues can sink more at the position of the second area 12, so that the space between the cartridge assembly and the anvil is better utilized.

Fig. 17 and 18 are schematic structural views of a cartridge assembly according to a fourth embodiment of the present invention. The fourth embodiment is different from the third embodiment in that, in the fourth embodiment, two sides of the connecting portion 21 are respectively provided with one second rotating shaft 212, two inner walls of the nail hole 12 are respectively provided with one groove 14, and the two second rotating shafts 212 are coaxially arranged.

Referring to FIGS. 19-22, a fifth embodiment of a staple cartridge assembly according to the present invention is shown. The fifth embodiment is different from the third embodiment in the structure of the boss 15. In the fifth embodiment, only one boss 15 is provided at the distal end of the nail hole 12. The upper surface of the bulge part 15 is a first area 11 of the nail bin surface 11, the upper surface of the position where the bulge part 15 is not arranged is a second area 12 of the nail bin 1, and the height of the first area 11 is higher than that of the second area 12. As shown in fig. 22, when the staple 2 is in the first state, the legs 22 of the staple 2 are at a height lower than the height of the first region 11 and higher than the height of the second region 12. The height of the connecting portion 21 and crown 23 of the staple 2 is lower than the height of the second region 12. Further, the protruding portion 15 is provided with a nail foot groove 151 at a position corresponding to the nail foot 22, the nail foot groove 151 is communicated with the nail hole 12, and the nail foot 22 is located in the nail foot groove 151.

In the fifth embodiment, by providing the protrusions 15 as shown in FIG. 20, the protrusions 15 can also increase the friction force against the tissue when the cartridge assembly and the anvil clamp the tissue, preventing the tissue from slipping distally during the operation. The sides of the raised portion 15 are also smooth surfaces with rounded corners to avoid tissue damage when in contact with tissue. In addition, by arranging the bulge part 15, the area of the nail bin surface 11 corresponding to the nail foot 22 is a high surface, when the anastomat is not fired, the nail foot 22 can be better hidden in the hole of the nail bin 1, and the tissue is prevented from being contacted and scratched.

The structures of the fourth and fifth embodiments may also be combined with the structures of the first and second embodiments described above. For example, it is within the scope of the present invention to provide a raised portion as in the fourth embodiment or a raised portion as in the fifth embodiment on the cartridge face of the first embodiment, or to provide a raised portion as in the fourth embodiment or a raised portion as in the fifth embodiment on the cartridge face of the second embodiment.

In the above embodiment, the heights of the cartridge surfaces are different, so that the first region 111 where the staple leg 22 and/or the connecting portion 21 are located is higher than the second region 112, which enables the staple 2 to hold more tissues in advance, and is more beneficial to anastomotic formation.

In the above embodiments, the staples 2 may preferably be biodegradable staples having biocompatibility or biodegradable and bioabsorbable staples, and after the staples 2 are sutured on the tissue, the subsequent staple removing operation is not required. For example, the staples 2 may be made of magnesium, magnesium alloy, degradable polymer material, etc., but the present invention is not limited thereto. Further, the surface of the staple 2 may also be coated with a degradable and bioabsorbable biocompatible coating. The coating may further improve the hardness of the staples 2 and may regulate the rate of degradation of the staples 2. 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 speed of the anastomosis nail 2 can 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 the staple 2 may be provided with a magnetic coating, which is magnetized when an external magnetic field is applied, so as to enhance 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 summary, the staple cartridge assembly and the medical stapler provided by the invention have the following advantages:

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

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

the anastomosis nails are positioned inside the nail holes and comprise connecting parts, the connecting parts are provided with second matching parts, and the second matching parts and the first matching parts form relatively rotatable embedded matching; and

2. The staple cartridge assembly of claim 1, wherein said first mating portion is a shaft and said second mating portion is a mounting hole that forms an interference fit with said shaft; or, the second cooperation portion is the pivot, first cooperation portion for with the pivot forms to inlay establishes the complex mounting groove.

3. The cartridge assembly of claim 1, wherein the staples have a first state and a second state, the staples rotating relative to the cartridge to the second state while the staples are in the first state and the firing block drives the staples to rotate;

the staple is in the second state, and when the firing block drives the staple to move upwards, the second matching part of the staple can be separated from the first matching part.

4. The staple cartridge assembly of claim 3, wherein the staples further comprise a leg and a crown, the crown being positioned between the leg and the connecting portion, the leg and the connecting portion being positioned at respective ends of the staple hole when the staples are in the first state, the leg and the connecting portion of the staples being positioned at a same end of the staple hole when the staples are in the second state.

5. The staple cartridge assembly of claim 3, wherein said first mating portion is a first pivot shaft and said second mating portion is a mounting hole having an opening on one side;

6. The cartridge assembly of claim 5, wherein the opening of the mounting hole is directed in a direction toward a proximal end side of the stapler when the staple is in the first state, and the opening of the mounting hole is directed in a downward direction when the staple is in the second state.

7. The staple cartridge assembly of claim 5, wherein said first pivot comprises two oppositely disposed first outer walls and two oppositely disposed second outer walls, said two second outer walls being disposed at opposite ends of said first outer walls and connected between said two first outer walls;

when the anastomotic nail is in the first state, the opening of the mounting hole is opposite to the first outer wall, and when the anastomotic nail is in the second state, the opening of the mounting hole is opposite to the second outer wall.

8. The staple cartridge assembly of claim 7, wherein said second outer wall is a radiused surface.

9. The staple cartridge assembly of claim 7, wherein a furthest distance between two of said first outer walls is less than an opening distance of said mounting hole, and a furthest distance between two of said second outer walls is greater than an opening distance of said mounting hole.

10. The staple cartridge assembly of claim 5, wherein a height of a highest point of said first hinge is less than a height of said staple cartridge face.

11. The staple cartridge assembly of claim 7, wherein said first outer wall is disposed perpendicular to an axial direction.

12. The staple cartridge assembly of claim 5, wherein said mounting holes are blind holes formed in the side walls of said connecting portion, or said mounting holes are through holes passing through both side walls of said connecting portion.

13. The staple cartridge assembly of claim 3, wherein said second mating portion is a second spindle and said first mating portion is a recess communicating with said staple cartridge face.

14. The staple cartridge assembly according to claim 13, wherein said second shafts are respectively disposed on two sides of said connecting portion, said grooves are respectively disposed on two inner walls of said staple hole, and said two second shafts are coaxially disposed.

15. The staple cartridge assembly of claim 13, wherein said staples are integrally formed with said second shaft, or said shaft is fixedly embedded in a connecting portion of said staples.

16. The staple cartridge assembly of claim 13, wherein said bottom surface of said recess is a radiused surface.

17. The staple cartridge assembly of claim 3, wherein said staples further comprise a leg and a crown, said crown being located between said connecting portion and said leg, said legs and connecting portion being located at respective distal and proximal ends of said staple holes when said staples are in said first state;

the cartridge face comprises a first region and a second region, the first region having a height that is higher than a height of the second region to form an upwardly convex protrusion relative to the second region; the boss is at least partially located on a distal side of the staple aperture.

18. The staple cartridge assembly of claim 17, wherein said protrusion defines a staple leg slot in communication with said staple aperture, said staple leg being positioned in said staple leg slot;

19. The staple cartridge assembly of claim 18, wherein a peak height of said legs is higher than a surface height of said second region when said staples are in said first state.

20. The staple cartridge assembly of claim 17, wherein the region of said staple cartridge face corresponding to said staple legs and said webs is said first region and the region of said staple cartridge face corresponding to said crown is said second region.

21. The staple cartridge assembly of claim 20, wherein a peak height of said connecting portion and a peak height of said legs are both greater than a surface height of said second region and less than a surface height of said first region when said staples are in said first state.

22. The staple cartridge assembly according to claim 1, wherein a staple abutting portion is provided at a side of a distal end of said staple hole facing away from said staple cartridge surface, and said staples at least partially abut against said staple abutting portion during rotation.

23. The staple cartridge assembly of claim 22, wherein a bottom of said staple abutment is weakly coupled to said staple cartridge, and wherein a distal end of said staple abutment folds distally without disengaging from said staple cartridge as said firing block moves distally past said staple abutment.

24. The staple cartridge assembly of claim 22, wherein a side of said staple cartridge facing away from said staple cartridge surface is provided with an escape portion, said escape portion is located at a distal end of said staple abutting portion, and said staple abutting portion at least partially enters said escape portion when folded back in a distal direction.

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

26. 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.

27. A medical stapler comprising a staple cartridge assembly according to any one of claims 1 to 26, further comprising a staple cartridge cover fixedly disposed on said staple cartridge.