CN115919393B

CN115919393B - Nail bin assembly and medical anastomat

Info

Publication number: CN115919393B
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: 2024-05-28
Anticipated expiration: 2041-09-09
Also published as: WO2023036222A1; CN115919393A

Abstract

The invention provides a nail bin assembly and a medical anastomat, wherein the nail bin assembly comprises: the nail comprises a nail bin, wherein the surface of one side of the nail bin is a nail bin surface, 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 the nail holes; the staples are positioned in the staple holes, the staples comprise connecting parts, the connecting parts are provided with second matching parts, and the second matching parts and the first matching parts form embedded matching capable of rotating relatively; and a firing block that drives the staples as it 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 separate from the first mating portions. The nail bin and the anastomat are matched with each other in a simple structure, and the anastomat is 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 anastomat generally comprises an instrument platform, a firing handle movably connected with the instrument platform and a nail head part arranged on the instrument platform. The staple head may be passed through a small incision in the body by a penetrator to access the surgical site to perform the procedure. The nail head comprises a nail bin assembly and a nail anvil which are oppositely arranged. A plurality of staples are mounted in the cartridge assembly. When the anastomat is triggered, the anastomat is pushed out towards the nail anvil by the triggering block, and the nail anvil is closed and molded to suture tissues. However, when the stapler is fired, the staples may become stuck and cannot be separated from the staple cartridge, affecting the surgical outcome.

In the present invention, the distal end side and the proximal end side are the proximal end side with respect to the operator, and the end closer to the operator, that is, the end closer to the surgical state, is the distal end side. In the anastomat, the inner side and the outer side are relative to the axis of the anastomat, the side 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, wherein the matching structure of a nail bin and an anastomat is simple, and the anastomat is easy to separate from the nail bin when the anastomat is in firing.

An embodiment of the present invention provides a staple cartridge assembly for a medical stapler, the staple cartridge assembly comprising:

The nail comprises a nail bin, wherein the surface of one side of the nail bin is a nail bin surface, 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 the nail holes;

The staples are positioned in the staple holes, the staples comprise connecting parts, the connecting parts are provided with second matching parts, and the second matching parts and the first matching parts form embedded matching capable of rotating relatively;

and when the firing block moves from the proximal end side to the distal end side of the staple cartridge, 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.

In some embodiments, the first mating portion is a shaft, and the second mating portion is a mounting hole that forms an embedded fit with the shaft; or the second matching part is a rotating shaft, and the first matching part is a mounting groove which is embedded and matched with the rotating shaft.

In some embodiments, the staples have a first state and a second state, the staples being in the first state and the firing block driving rotation of the staples, the staples rotating relative to the staple cartridge to the second state; the staples are in the second state, and when the firing block drives the staples to move upwards, the second matching parts of the staples can be separated from the first matching parts.

In some embodiments, the staple further comprises a foot and a crown between the foot and the connecting portion, the foot and the connecting portion being located at opposite ends of the staple hole when the staple is in the first state, and the foot and the connecting portion of the staple being located at the same end of the staple hole when the staple is in the second state.

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

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

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

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

when the anastomat is in the first state, the opening of the mounting hole is opposite to the first outer wall, and when the anastomat 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 rounded surface.

In some embodiments, a furthest distance between the two first outer walls is less than an opening distance of the mounting hole, and a furthest distance between the two second outer walls is greater than the opening distance of the mounting hole.

In some embodiments, the highest point of the first shaft has a height that is lower than the height of the 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 connection portion, or the mounting hole is a through hole penetrating through two side walls of the connection portion.

In some embodiments, the second mating portion is a second shaft and the first mating portion is a recess that communicates to the cartridge face.

In some embodiments, two sides of the connecting portion are respectively provided with a second rotating shaft, two inner walls of two sides of the nail hole are respectively provided with a groove, and two second rotating shafts are coaxially arranged.

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

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

In some embodiments, the staple further comprises a staple foot and a staple crown located between the connecting portion and the staple foot, the staple foot and the connecting portion being positioned to correspond to the distal end and the proximal end of the staple aperture, respectively, when the staple is in the first state;

The staple cartridge face includes a first region and a second region, the first region having a height that is greater than a height of the second region to form an upwardly projecting boss relative to the second region;

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

In some embodiments, the boss is provided with a pin slot in communication with the pin hole, the pin being located in the pin slot;

When the anastomat is in the first state, the highest point height of the nail foot is lower than the surface height of the convex part.

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

In some embodiments, the area of the cartridge face corresponding to the staple legs and the connecting portion is the first area and the area of the cartridge face corresponding to the staple crown is the second area.

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

In some embodiments, a distal end of the staple hole is provided with a staple abutment on a side facing away from the staple cartridge face, and the staple is at least partially abutted against the staple abutment during rotation.

In some embodiments, the bottom of the staple abutment is weakly connected to the staple cartridge, and the distal end of the staple abutment is folded distally without disengaging the staple cartridge as the firing block moves distally past the staple abutment.

In some embodiments, an avoidance portion is disposed on a side of the staple cartridge facing away from the staple cartridge face, the avoidance portion is located at a distal end of the staple supporting portion, and when the staple supporting portion is turned in a distal direction, at least part of the staple supporting portion enters the avoidance 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 anastomat is provided with a magnetic coating, and the anastomat 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 an anastomat 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 anastomat is simple, and when the anastomat is fired, the anastomat rotates under the drive of a firing block and is separated from the nail bin, so that the condition that the anastomat is blocked and cannot be separated from the nail bin 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 detailed description of non-limiting embodiments, made with reference to the following drawings.

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

FIG. 2 is an exploded view of a staple cartridge assembly of a first embodiment of the present invention;

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

fig. 4 and 5 are schematic views of the first embodiment of the present invention with the staples engaged with a first shaft;

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

Fig. 7 and 8 are schematic views of the cooperation of a staple and a first shaft of a second embodiment of the present invention;

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

FIG. 10 is a schematic view of the structure of a staple cartridge assembly of 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 of FIG. 11;

fig. 13 is a schematic structural view of a staple of 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 cross-sectional view taken in the direction B1-B1 of FIG. 14;

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

FIG. 17 is a schematic view of the structure of a cartridge assembly of a fourth embodiment of the present invention;

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

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

FIG. 20 is an enlarged view at A4 of 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:

1. nail butting part of nail bin 16

11. Nail bin surface 17 avoiding part

111. First zone 2 staple

112. Second region 21 connection

12. Nail hole 211 mounting hole

13. The first shaft 212 rotates

131. First outer wall 22 nail leg

132. Second outer wall 23 crown

14. Groove 3 nail bin cover

141. Firing block with groove bottom surface 4

15. The protruding part 41 is a nail pushing part

151. Pin slot

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be embodied in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the 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 anastomat generally comprises an instrument platform, a firing handle movably connected with the instrument platform and a nail head part arranged on 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. Wherein, a side surface of the nail bin is a nail bin surface, and a plurality of nail holes are formed on the nail bin surface. The inner wall of at least one side of the nail hole is provided with a first matching part. The anastomat is located inside the nail hole, the anastomat 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 embedded matching capable of rotating relatively. When the firing block moves from the proximal side to the distal side of the staple cartridge, the firing block drives the staples such that the second mating portions of the staples rotate relative to and separate from the first mating portions. Therefore, the nail bin and the anastomat form relatively rotatable and separable matching through the first matching part and the second matching part, the matching structure of the nail bin and the anastomat is simple, and when the anastomat is triggered, the anastomat rotates under the drive of the trigger block and is separated from the nail bin, so that the condition that the anastomat is blocked and cannot be separated from the nail bin is avoided, and the operation effect is improved.

The structure of the cartridge assembly of various embodiments of the present invention will be described in detail below with reference to the accompanying drawings, it being understood that the various embodiments are not limiting of the scope of the present invention.

Fig. 1-6 are schematic structural views of a cartridge 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 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 positioned 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 opposite to the nail bin surface 11 and two side walls positioned on two sides of the nail bin 1, and the two side walls of the nail bin cover 3 can be fixedly connected with the nail bin 1 through clamping or welding. Forming a cavity housing said staples 2. The firing block 4 and the plurality of staples 2 are both housed 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 nail holes 12 is arranged along the axial direction of the anastomat, and the nail holes 12 of two adjacent rows are staggered. The staples 2 are positioned inside the staple holes 12. Two rows of staples 2 are only exemplarily shown in fig. 2. 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 at a proximal side of the staple cartridge 1, and when the stapler is fired, the firing block 4 can move from the proximal side to the distal side of the staple cartridge 1.

As shown in fig. 3 and 4, the inner wall of at least one side of the nail hole 12 is provided with a first fitting portion. The staple 2 comprises a connecting portion 21, a leg 22 and a crown 23, the crown 23 being located between the connecting portion 21 and the leg 22, the leg 22 being located on the distal side of the connecting portion 21. After the anastomat is fired, when the anastomat 2 is closed and molded on tissues, the pin 22 of the anastomat 2 is close to the connecting part 21 to be integrally closed into D shape. When the anastomat 2 is in the second state, the pin 22 and the connecting part 21 of the anastomat 2 are positioned at the same end of the pin hole 12, and when the anastomat 2 is in the second state, the pin 22 and the connecting part 21 of the anastomat 2 are positioned at the right end of the pin hole 12 in the view of fig. 2. When the anastomotic nail 2 is installed in the nail hole 12, the connecting part 21 and the nail foot 22 of the anastomotic nail 2 respectively correspond to the proximal end and the distal end of the nail hole 12, and the nail crown 23 of the anastomotic nail 2 corresponds to the middle part of the nail hole 12. The connecting portion 21 is provided with a second mating portion, and the second mating portion and the first mating portion form a relatively rotatable embedded mating. In this embodiment, the first engaging portion is a first rotating shaft 13 provided on an inner wall of the nail hole 12, and the second engaging 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 respectively showing the first state and the second state of the staples 2 and the cooperation of the staples 2 with the first shaft 13 in different states. As shown in fig. 4, in the initial state, the staple 2 is in the first state, the first shaft 13 is embedded in the mounting hole 211, and the diameter of the mounting hole 211 is larger than the diameter of the first shaft 13, so that the staple 2 can rotate around the first shaft 13. The mounting hole 211 has an opening at one side. When the staples 2 are in the first state, the opening direction of the mounting hole 211 is a direction from the distal side to the proximal side of the stapler, i.e., the mounting hole 211 is opened 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, the nail pushing part 41 of the firing block 4 contacts with the crown 23 of the staple 2 and drives the staple 2 to rotate (the nail feet 22 of the staple 2 rotate clockwise in the view of fig. 4) when the firing block 4 moves from the proximal end side to the distal end side of the staple cartridge 1, and the nail feet 22 of the staple 2 extend out of the nail holes 12 and are gradually closed to the connecting part 21 under the action of the nail 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 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 upward, and the mounting holes 211 of the staples 2 can be separated from the first rotary shaft 13 at the opening due to the downward opening direction of the mounting holes 211. Therefore, the nail bin 1 and the anastomat 2 form a rotatable and separable fit through the embedding combination of the first rotating shaft 13 and the mounting hole 211, the fit structure of the nail bin 1 and the anastomat 2 is simple, and when the anastomat is triggered, the anastomat 2 rotates and is separated from the nail bin 1 under the driving of the triggering block 4, so that the condition that the anastomat 2 is blocked and cannot be separated from the nail bin 1 is avoided, and the operation effect is improved.

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

As shown in fig. 3, in this embodiment, the highest point of the first rotary shaft 13 is lower than the height of the cartridge face 11, and in the first state, the connecting portion 21 of the staples 2 does not protrude from the surface of the cartridge face 11. In the first state, the highest point of the legs 22 of the staples 2 is also lower than the height of the cartridge face 11, so that the legs 22 of the staples 2 do not protrude from the surface of the cartridge face 11. Thus, in the first state of the staple 2, the staple 2 as a whole is positioned inside the staple hole 12, avoiding scratching the tissue when in contact with it.

As shown in fig. 2 to 4, in this embodiment, the mounting hole 211 is a through hole penetrating through two side walls of the connecting portion 21, and the first rotating shaft 13 communicates with two side inner walls of the nail hole 12, that is, a length of the first rotating shaft 13 in the S2 direction is substantially equal to a distance between the two side inner walls of the nail hole 12. In another alternative embodiment, the mounting hole 211 may be a blind hole formed on one or both side walls of the connecting portion 21. The length of the first rotation shaft 13 in the S2 direction may be smaller than the distance between the inner walls of the two sides of the nail hole 12. The first rotating shaft 13 may be provided at only one side, or both sides may be provided 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 be an elliptical hole, or a hole with a cambered surface partially and a straight surface partially, and the first shaft 13 may be another shape, for example, a cylinder with a cross section of an ellipse, a rounded rectangle, a sector, a semicircle, or the like.

As shown in fig. 7 to 9, the second embodiment of the present invention is schematically shown in a configuration in which the staples 2 are engaged with the first shaft 13. Fig. 7 and 8 show the configuration of the staples 2 of this second embodiment in cooperation with the first 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 oppositely disposed first outer walls 131 and two oppositely disposed second outer walls 132, 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 the direction from the distal end side to the proximal end side of the stapler, and the opening of the mounting hole 211 is opposite 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 downward, and the opening of the mounting hole 211 is opposite to 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 the left and right sidewalls of the first rotating shaft 13, and the two second outer walls 132 are the upper and lower sidewalls of the first rotating shaft 13.

As shown in fig. 7 to 9, in this embodiment, the second outer wall 132 is a circular arc surface to cooperate with the mounting hole 211, and the second outer wall 132 guides the rotational movement of the staples 2 when the staples 2 are 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. And, as shown in fig. 7, the distance w2 between the two second outer walls 132 is greater than the opening distance w1 of the mounting hole 211, so as to ensure the stability of the engagement of the staples 2 with the first shaft 13 in the first state, and prevent the mounting hole 211 of the staples 2 from being separated from the first shaft 13 when the stapler is unfired. As shown in fig. 8, the furthest 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 staples 2 are in the second state, the staples 2 can move upwards under the action of the staple pushing portion 41 of the firing block 4 and be separated from the first rotating shaft 13 when the opening is located.

Fig. 10-16 are schematic structural views of a cartridge assembly according to a third embodiment of the present invention. The first difference between this embodiment and the first embodiment is that the first mating portion and the second mating portion are different in structure from the first embodiment. As shown in fig. 10 to 13, in the third embodiment, the second engaging portion is a second rotating shaft 212 disposed on one side wall of the connecting portion 21, and the first engaging portion is a groove 14 communicating with the cartridge surface 11. In this embodiment, the staples 2 are integrally formed with the second shaft 212. In another alternative embodiment, the second shaft 212 may be fixedly embedded in the connecting portion 21 of the staple 2, so that the second shaft 212 and the connecting portion 21 form a connection that cannot rotate relatively, that is, when the staple 2 rotates, the second shaft 212 is driven to rotate, for example, an interference fit is formed between the second 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 legs 22 of the staples 2 is also lower than the height of the cartridge surface 11. After the staples 2 are rotated into the second state, the second shaft 212 may be moved upward by the staple pushing portion 41 of the firing block 4 to be separated from the recess 14 from the upper end opening of the recess 14.

In this embodiment, as shown in fig. 15, the distal end of the staple hole 12 is provided with a staple abutment 16 on the side facing away from the cartridge face 11. In the initial state, the legs 22 of the staples 2 are at least partially abutted against the abutment 16. The staples 2 are at least partially abutted against the abutting portions 16 during rotation, and preferably, the shape of the abutting portions 16 is matched with the shape of the staple legs. The pin 22 of the anastomat 2 can be always supported and limited in the rotation process of the anastomat 2 by the pin abutting part 16, can smoothly extend out of the nail hole 12, and can not excessively deviate in the far-end direction in the rotation process of the anastomat 2. Preferably, the bottom of the abutment 16 is weakly connected to the cartridge 1, and when the firing block 4 moves distally beyond the abutment 16, the end of the abutment 16 (i.e., the lower end of the abutment 16 shown in fig. 15) is folded distally without disengaging the cartridge 1, preventing the rotational movement of the staples 2 from being blocked, and the abutment 16 does not disengage from the cartridge 1 and enter the human body. The bottom of the nail propping part 16 is the side connected with the nail bin.

Further, as shown in fig. 15, a side of the nail bin 1 facing away from the nail bin surface 11 is provided with a avoiding portion 17, the avoiding portion 17 is located at a distal end of the nail abutting portion 16, and when the nail abutting portion 16 is turned over in a distal direction, at least part of the nail abutting portion enters the avoiding portion 17. In fig. 15, only the avoiding portion 17 at the distal end of the first abutting portion 16 is shown by way of example, and the avoiding portions 17 may be disposed at the distal ends of other avoiding portions 16, so that the abutting portion 16 is conveniently turned over in the distal direction by the acting force of the staples 2, and the turning over of the abutting portion 16 is buffered to some extent, so that the abutting portion 16 is prevented from being broken at the joint with the staple cartridge 1. The relief 17 may be a groove at the distal end of the abutment 16. When the firing block 4 moves distally beyond the nail abutting portion 16, the nail abutting portion 16 can be retracted into the retraction portion 17, and movement of the firing block 4 is not hindered.

The structure of the abutment 16 and the relief 17 shown in fig. 15 may also be applied to the first and second embodiments, i.e. the distal end of the nail hole 12 of the first and/or second embodiment is provided with the abutment 16 on the side facing away from the surface 11 of the nail cartridge, and in the initial state, the nail leg 22 of the staple 2 abuts against the abutment 16. The staples 2 are at least partially abutted against the abutment 16 during rotation. Preferably, the bottom of the nail propping part 16 is weakly connected with the nail bin 1, and when the firing block 4 moves distally beyond the nail propping part 16, the tail end of the nail propping part 16 is folded in the distal direction and is not separated from the nail bin 1. In the first embodiment and/or the second embodiment, a side of the staple cartridge 1 facing away from the staple cartridge surface 11 may be provided with an avoidance portion 17, where the avoidance portion 17 is located at a distal end of the abutting portion 16, and when the abutting portion 16 is turned in a distal direction, at least part of the rivet enters the avoidance portion 17. Specifically, the weak connection between the bottom of the abutting portion 16 and the cartridge 1 may be a weak connection formed by breaking the bottom of the abutting portion 16.

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

As shown in fig. 11, 12 and 15, the third embodiment differs from the first embodiment in the second difference in the structure of the cartridge face 11. In the third embodiment, the cartridge face 11 includes a first region 11 and a second region 12, the first region 11 having a height higher than that of the second region 12 to form an upwardly convex protrusion 15 with respect to the second region 12, that is, the cartridge face 11 provided with the position of the protrusion 15 belongs to the first region 11, and the cartridge face 11 not provided with the position of the protrusion 15 belongs to the second region 12. The positions of the legs 22 and the connecting portion 21 correspond to the distal and proximal ends of the staple holes 12, respectively, when the staple 2 is in the first state. The area of the cartridge surface 11 corresponding to the staple legs 22 and the connecting portions 21 is the first area 11, and the area of the cartridge surface 11 corresponding to the crowns 23 is the second area 12. Further, the protruding portion 15 is provided with a pin groove 151 at a position corresponding to the pin 22, the pin groove 151 is communicated with the pin hole 12, the pin 22 is located in the pin groove 151, so that when the staple 2 is in the first state, the highest point heights of the pin 22 and the connecting portion 21 are lower than the surface height of the protruding portion 15, and the highest point heights of the pin 22 and the connecting portion 21 are higher than the height of the second region 12.

In this embodiment, by providing the protruding portion 15 such that the cartridge face 11 has a concave-convex structure, friction to the tissue is improved when the cartridge assembly and the anvil clamp the tissue, and the tissue is prevented from slipping to the distal end side during the operation. The upper surface of the protruding portion 15 is a plane, and each side surface of the protruding portion 15 is a smooth surface with rounded corners, so that damage to tissues when the protruding portion contacts with the tissues is avoided. In addition, by providing the protruding portion 15, the area of the cartridge surface 11 corresponding to the staple legs 22 and the connecting portion 21 is a high surface, so that the staple legs 22 and the connecting portion 21 can be better hidden in the hole of the staple cartridge 1 when the stapler is not fired, and the contact with tissues to scratch the tissues is avoided. And the cartridge face 11 has a lower surface in the area corresponding to the crown 23, which gives more sinking space to the tissue when the cartridge assembly clamps the tissue with the anvil, and the tissue can have more sinking at the location of the second area 12, which makes better use of the space between the cartridge assembly and the anvil.

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 two sides of the nail hole 12 are respectively provided with one groove 14, and the two second rotating shafts 212 are coaxially arranged.

Fig. 19-22 are schematic structural views of a cartridge assembly according to a fifth embodiment of the present invention. This fifth embodiment differs from the third embodiment in that the structure of the boss 15 is different. In the fifth embodiment, only one boss 15 is provided at the distal end of the nail hole 12. The upper surface of the protruding part 15 is a first area 11 of the nail bin surface 11, the upper surface of the position where the protruding 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 height of the legs 22 of the staple 2 is 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 of the crown 23 of the staple 2 is lower than the height of the second zone 12. Further, the protruding portion 15 is provided with a pin groove 151 at a position corresponding to the pin 22, the pin groove 151 is communicated with the pin hole 12, and the pin 22 is located in the pin groove 151.

In the fifth embodiment, by providing the bosses 15 as shown in fig. 20, the bosses 15 can also increase friction against tissue as the cartridge assembly and anvil clamp the tissue, preventing the tissue from slipping distally during the procedure. The sides of the boss 15 are also smooth surfaces with rounded corners to avoid damage to tissue when in contact with the tissue. In addition, by providing the protruding portion 15, the area of the cartridge surface 11 corresponding to the pin 22 is a high surface, so that the pin 22 can be better hidden in the hole of the cartridge 1 when the stapler is not fired, and the contact with the tissue to scratch the tissue is avoided.

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

In the above embodiment, the heights of the staple cartridge surfaces are different, so that the first area 111 where the staple legs 22 and/or the connecting portions 21 are located is higher than the second area 112, which can enable the staples 2 to accommodate more tissues in advance, and is more beneficial to anastomosis.

In the above embodiments, the staples 2 may be preferably biocompatible staples of degradable material or biodegradable and bioabsorbable staples, and no subsequent staple removing operation is required after the staples 2 are sutured to the tissue. For example, the staples 2 are made of magnesium, magnesium alloy, degradable polymer material, etc., but the present invention is not limited thereto. Further, the surface of the staples 2 may also be coated with a degradable and bioabsorbable biocompatible coating. The coating may further increase the hardness of the staples 2 and may regulate the degradation rate of the staples 2. The coating may be, for example, a coating of the absorbable material l-polylactic acid (PLLA) and/or racemic polylactic acid (PDLLA), but the present invention is not limited thereto. The degradation rate of the whole of the staple 2 can be adjusted by adjusting the thickness of the coating. Or the coating can be a medicament with blood coagulation effect, etc., and can improve bleeding, etc. in the anastomosis process. In other embodiments, the surface of the staple 2 may be provided with a magnetic coating which is magnetized upon the application of an external magnetic field, which may achieve an effect of increasing the anastomosis strength. The external magnetic field can be an electromagnetic field, and the magnetic field intensity can be adjusted to adapt to the requirements of anastomosis; or may be 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 further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. A staple cartridge assembly for a medical stapler, the staple cartridge assembly comprising:

The nail comprises a nail bin, wherein one side surface of the nail bin is a nail bin surface, a plurality of nail holes are formed in the nail bin surface, a first matching part is arranged on the inner wall of at least one side of each nail hole, the first matching part is a first rotating shaft, the first rotating shaft comprises two oppositely arranged first outer walls and two oppositely arranged second outer walls, and 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;

The anastomat comprises a connecting part, wherein the connecting part is provided with a second matching part, the second matching part is a mounting hole with an opening at one side, and the second matching part and the first matching part form embedded matching capable of rotating relatively; and

A firing block that drives the staples as it moves from a proximal side to a distal side of the staple cartridge such that a second mating portion of the staples rotates relative to and is separated from the first mating portion;

wherein the staple has a first state and a second state; when the staples are in the first state and the firing block drives the staples to rotate, the staples rotate to the second state relative to the staple cartridge; 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;

wherein, when the anastomat is in the first state, the opening of the mounting hole is opposite to the first outer wall, and when the anastomat is in the second state, the opening of the mounting hole is opposite to the second outer wall; the furthest distance between the two first outer walls is smaller than the opening distance of the mounting hole, and the furthest distance between the two second outer walls is larger than the opening distance of the mounting hole.

2. The staple cartridge assembly of claim 1 wherein said staple further comprises a foot and a crown, said crown being located between said foot and said connecting portion, said foot and said connecting portion being located at opposite ends of said staple aperture when said staple is in said first state, and said foot and said connecting portion being located at the same end of said staple aperture when said staple is in said second state.

3. The staple cartridge assembly of claim 1 wherein the direction of the opening of the mounting hole is in a direction toward the proximal side of the stapler when the staple is in the first state and the direction of the opening of the mounting hole is downward when the staple is in the second state.

4. The staple cartridge assembly of claim 1 wherein said second outer wall is a radiused surface.

5. The staple cartridge assembly of claim 1 wherein a highest point of said first rotary shaft has a height that is lower than a height of said staple cartridge face.

6. The staple cartridge assembly of claim 1 wherein said first outer wall is disposed perpendicular to the axial direction.

7. The staple cartridge assembly of claim 1 wherein the mounting holes are blind holes opening into the side walls of the connecting portion or wherein the mounting holes are through holes extending through both side walls of the connecting portion.

8. The staple cartridge assembly of claim 1 wherein said staple further comprises a staple foot and a staple crown, said staple crown being positioned between said connecting portion and said staple foot, said staple foot and said connecting portion being positioned to correspond to a distal end and a proximal end of said staple aperture, respectively, when said staple is in said first state;

The staple cartridge face includes a first region and a second region, the first region having a height that is greater than a height of the second region to form an upwardly projecting boss relative to the second region; the boss is at least partially located on a distal side of the tack hole.

9. The staple cartridge assembly of claim 8 wherein said raised portion defines a staple foot channel in communication with said staple aperture, said staple foot being positioned in said staple foot channel;

10. The staple cartridge assembly of claim 9 wherein a highest point height of said staple legs is higher than a surface height of said second region when said staples are in said first state.

11. The staple cartridge assembly of claim 8 wherein the region of said staple cartridge face corresponding to said staple legs and said connecting portion is said first region and the region of said staple cartridge face corresponding to said staple crown is said second region.

12. The staple cartridge assembly of claim 11 wherein, when the staples are in the first state, both a highest point height of the connecting portion and a highest point height of the staple legs are higher than a surface height of the second region and lower than a surface height of the first region.

13. The staple cartridge assembly of claim 1 wherein a side of the distal end of the staple bore facing away from the staple cartridge face is provided with a staple abutment against which at least a portion of the staple is held during rotation.

14. The staple cartridge assembly of claim 13 wherein a bottom of the staple abutment is weakly coupled to the staple cartridge and wherein a distal end of the staple abutment is folded distally without being disengaged from the staple cartridge as the firing block moves distally past the staple abutment.

15. The staple cartridge assembly of claim 13 wherein a side of said staple cartridge facing away from said staple cartridge face is provided with a relief portion, said relief portion being positioned at a distal end of said staple abutment, said staple abutment at least partially entering said relief portion when folded in a distal direction.

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

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

18. A medical stapler comprising the cartridge assembly of any one of claims 1-17, further comprising a cartridge cover fixedly disposed on the cartridge.