WO2023036222A1

WO2023036222A1 - Staple cartridge assembly and medical stapler

Info

Publication number: WO2023036222A1
Application number: PCT/CN2022/117723
Authority: WO
Inventors: 丁水澄
Original assignee: 天臣国际医疗科技股份有限公司
Priority date: 2021-09-09
Filing date: 2022-09-08
Publication date: 2023-03-16
Also published as: CN115919393A

Abstract

The present invention provides a staple cartridge assembly and a medical stapler. The staple cartridge assembly comprises: a staple cartridge, one side surface of the staple cartridge being a staple cartridge surface, a plurality of staple holes being formed on the staple cartridge surface, and an inner wall of at least one side of each staple hole being provided with a first matching portion; a plurality of anastomotic staples located inside the staple holes, each anastomotic staple comprising a connecting portion, the connecting portion being provided with a second matching portion, and the second matching portion forming a relatively rotatable embedded fit with the first matching portion; and a firing block that drives the anastomotic staple when the firing block moves from a proximal side to a distal side of the staple cartridge, such that the second matching portion of the anastomotic staple rotates with respect to the first matching portion and is separated from the first matching portion. The staple cartridge and the anastomotic staples in the present invention are simple in matching structure, and the anastomotic staples are easily separated from the staple cartridge when the stapler is fired.

Description

Staple cartridge components and medical staplers

technical field

The invention relates to the technical field of medical devices, in particular to a staple cartridge assembly and a medical stapler.

Background technique

In the prior art, a medical stapler generally includes an instrument platform, a firing handle movably connected to the instrument platform, and a nail head mounted on the instrument platform. The nail head can be passed through a small incision in the body with a trocar to access the surgical site. The nail head includes a nail cartridge assembly and a nail anvil which are arranged oppositely. A plurality of staples are installed in the staple cartridge assembly. When the stapler is fired, the staples are pushed out toward the anvil through the firing block, and are closed and formed at the anvil to suture the tissue. However, when the stapler is fired, the staples may be stuck and cannot be separated from the staple cartridge, which affects the surgical effect.

In the present invention, the distal side and the proximal side are relative to the operator, the end closer to the operator is the proximal side, and the end farther away from the operator, that is, the end closer to the operation state is the far side. end side. In a stapler, the inside and outside are relative to the axis of the stapler, the side close to the axis is the inside, and the side away from the axis is the outside.

Contents of the invention

In view of the problems in the prior art, the object of the present invention is to provide a staple cartridge assembly and a medical stapler. The staple cartridge and the staples have a simple matching structure, and the staples are easy to separate from the staple cartridge when the stapler is fired.

An embodiment of the present invention provides a staple cartridge assembly for a medical stapler. The staple cartridge assembly includes: a staple cartridge, one side surface of the staple cartridge is a staple cartridge surface, and a plurality of staples are arranged on the staple cartridge surface A hole, the inner wall of at least one side of the nail hole is provided with a first matching portion; a plurality of staples, the staples are located inside the nail hole, the staples include a connecting portion, and the connecting portion is provided with The second matching part, the second matching part forms a relatively rotatable embedded fit with the first matching part; and the firing block, when the firing block moves from the proximal end side to the distal end side of the nail cartridge , the firing block drives the staple, so that the second matching portion of the staple rotates relative to the first matching portion and separates from the first matching portion.

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

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

In some embodiments, the first rotating shaft includes two opposite first outer walls and two opposite second outer walls, the two second outer walls are respectively located at two ends of the first outer wall, and are respectively connected between the two first outer walls.

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

In some embodiments, the furthest distance between the two first outer walls is smaller than the opening distance of the installation hole, and the furthest distance between the two second outer walls is greater than the opening distance of the installation hole .

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

In some embodiments, the height of the highest point of the first rotating shaft is lower than the height of the staple cartridge surface.

In some embodiments, the installation hole is a blind hole opened on at least one side wall of the connection part, or the installation hole is a through hole penetrating through two side walls of the connection part.

In some embodiments, the staple further includes a staple foot, the staple includes an initial first state, and when the staple is in the first state, the staple foot is located at the distal end of the staple hole The staple cartridge surface includes a first area and a second area, the height of the first area is higher than the height of the second area, so as to form an upward convex in the first area relative to the second area a raised raised portion; the raised portion is at least partially located on the distal side of the nail hole.

In some embodiments, when the staple is in the first state, the height of the highest point of the staple foot is lower than the surface height of the protrusion; and/or, the staple is in the first state state, the height of the highest point of the nail foot is higher than the surface height of the second region.

In some embodiments, the staple further includes a first portion located between the connecting portion and the staple foot, and the area of the cartridge surface corresponding to the staple foot and the connecting portion is the In the first area, the area corresponding to the first part of the staple cartridge surface is the second area; or, the area corresponding to the nail foot on the staple cartridge surface is the first area, the The portion of the cartridge surface corresponding to the connecting portion and the first portion is the second region.

In some embodiments, the staple cartridge is provided with a cutter groove extending in the axial direction, and on each side of the cutter groove, the second region communicates as an axially continuous surface.

In some embodiments, when the staple is in the first state, the height of the highest point of the connecting portion and the height of the highest point 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.

In some embodiments, each side of the protrusion is a smooth surface with rounded corners.

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

In some embodiments, the bottom of the anvil is weakly connected with the staple cartridge, and when the firing block moves over the anvil in the direction of the distal end, the end of the anvil moves in the distal direction. Fold over without breaking away from the staple cartridge.

In some embodiments, the side of the staple cartridge facing away from the surface of the staple cartridge is provided with an avoidance part, the avoidance part is located at the distal end of the nail abutment part, and when the nail abutment part is folded in the distal direction , at least partially entering the avoidance portion.

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

In some embodiments, the surface of the staple is provided with a biodegradable and bioabsorbable coating with biocompatibility; and/or, the surface of the staple is provided with a magnetic coating, which can Next, the staples are magnetized.

An embodiment of the present invention also provides a medical stapler, including the above-mentioned staple cartridge assembly.

The staple cartridge assembly and the medical stapler provided by the present invention have the following advantages:

The present invention provides a staple cartridge assembly for a medical stapler. The staple cartridge and the staples form a relatively rotatable and detachable embedded fit through a first fitting part and a second fitting part. The staple cartridge and the staple The matching structure of the staples is simple, and when the stapler is fired, the staples are driven by the firing block to rotate and separate from the staple cartridge, which avoids the situation that the staples are stuck and cannot be separated from the staple cartridge, and improves the surgical effect.

Description of drawings

Other characteristics, objects and advantages of the present invention will become more apparent by reading the detailed description of non-limiting embodiments with reference to the following 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 according to the first embodiment of the present invention;

Figure 3 is an enlarged view of A1 in Figure 2;

Fig. 4 and Fig. 5 are schematic diagrams of the cooperation between the staple and the first rotating shaft according to the first embodiment of the present invention;

Fig. 6 is a schematic structural diagram of the firing block of the first embodiment of the present invention;

Fig. 7 and Fig. 8 are schematic diagrams of the cooperation between the staple and the first rotating shaft according to the second embodiment of the present invention;

9 is a schematic cross-sectional view of a first 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 the staple cartridge assembly according to the 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 according to a third embodiment of the present invention;

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

Fig. 15 is a sectional view of B1-B1 direction in Fig. 14;

Fig. 16 is a sectional view of B2-B2 direction in Fig. 14;

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

Figure 18 is an enlarged view at A3 in Figure 17;

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

Figure 20 is an enlarged view at A4 in Figure 19;

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

Fig. 22 is a cross-sectional view along B3-B3 in Fig. 21 .

Detailed ways

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, 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 example embodiments to those skilled in the art. The same reference numerals denote the same or similar structures in the drawings, and thus their repeated descriptions will be omitted.

The invention provides a staple cartridge assembly for a medical stapler and a medical stapler comprising the same. The medical stapler generally includes an instrument platform, a firing handle movably connected to the instrument platform, and a nail head installed on the instrument platform. The nail head includes a nail cartridge assembly and a nail anvil which are oppositely arranged. The staple cartridge assembly includes a plurality of staples, a staple cartridge for accommodating the staples, and a firing block for driving the staples. Wherein, one side surface of the staple cartridge is a staple cartridge surface, and the staple cartridge surface is provided with a plurality of nail holes. The inner wall of at least one side of the nail hole is provided with a first matching portion. The staple is located inside the staple hole, the staple includes a connecting portion, the connecting portion is provided with a second fitting portion, and the second fitting portion and the first fitting portion form a relatively rotatable fitting. Set to cooperate. When the firing block moves from the proximal side to the distal side of the staple cartridge, the firing block drives the staple so that the second matching portion of the staple rotates relative to the first matching portion and separated from the first mating part. Therefore, the staple cartridge and the staples in the present invention form a relatively rotatable and detachable embedded fit through the first fitting part and the second fitting part. When the device is fired, the staples are driven by the firing block to rotate and separate from the staple cartridge, which avoids the situation that the staples are stuck and cannot be separated from the staple cartridge, and improves the surgical effect.

The structure of the staple cartridge assembly of each specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that each specific embodiment is not intended to limit the scope of protection of the present invention.

1 to 6 are schematic structural views of the staple cartridge assembly according to the first embodiment of the present invention. As shown in FIGS. 1 and 2 , in the first embodiment, the staple cartridge assembly includes a plurality of staples 2 , a staple cartridge 1 for containing the staples 2 and a firing block 4 for driving the staples 2 . Wherein, one side surface of the staple cartridge 1 is the staple cartridge surface 11 (in the perspective of FIG. 1 , the upper surface of the staple cartridge 1 is the staple cartridge surface 11). The staple cartridge assembly also includes a staple cartridge cover 3 located below the staple cartridge 1, the staple cartridge cover 3 is combined with the staple cartridge 1, specifically, the staple cartridge cover 3 includes a The bottom wall opposite to the surface 11 and the two side walls located on both sides of the staple cartridge 1, the two side walls of the staple cartridge cover 3 can be fixedly connected to the staple cartridge 1 by clamping or welding to form an accommodating Describe the cavity of the staple 2. Both the firing block 4 and the plurality of staples 2 are accommodated in the cavity. The staple cartridge surface 11 is provided with a plurality of nail holes 12, and the nail holes 12 can be divided into one or more rows. In this embodiment, the nail holes 12 are distributed in multiple rows, each row of nail holes 12 is arranged along the axial direction of the stapler, and the nail holes 12 of two adjacent rows are axially staggered. The staple 2 is located inside the staple hole 12 . Only two rows of staples 2 are shown by way of example in FIG. 2 . The firing block 4 is at least partly located in the staple cartridge 1 , and the bottom surface of the firing block 4 is against the inner surface of the bottom wall of the staple cartridge cover 3 . In an initial state, the firing block 4 is located at the proximal side of the staple cartridge 1 , and when the stapler is fired, the firing block 4 is driven to move from the proximal side to the distal side of the staple cartridge 1 .

As shown in FIGS. 3 and 4 , the staple 2 includes a connecting portion 21, a nail foot 22 and a nail crown 23, and the nail crown 23 is located between the connecting portion 21 and the nail foot 22. The feet 22 are located on the distal side of the connecting portion 21 . After the firing of the stapler is completed, the staple 2 is closed and formed on the tissue, the nail crown 23 of the staple 2 extends close to the axial direction, and the nail foot 22 of the staple 2 is close to the connecting portion 21 to form an integral closure. Synthesize D type, at this moment, the nail feet 22 of the staple 2 and the connecting portion 21 are located at the same end of the nail hole 12, in this embodiment, the same end is the proximal end of the nail hole 12, at In the perspective of FIG. 5 , when the staple 2 is closed and formed, the staple foot 22 and the connecting portion 21 of the staple 2 are located at the right end of the staple hole 12 . 3 and 4, when the staple 2 is installed in the staple hole 12, the connecting portion 21 and the nail foot 22 of the staple 2 are respectively connected to the proximal end and the distal end of the staple hole 12. Corresponding to the end, the crown 23 of the staple 2 is nearly perpendicular to the axial direction or inclined toward the distal side. The inner wall of at least one side of the nail hole 12 is provided with a first matching portion, and the connecting portion 21 is provided with a second matching portion, and the second matching portion and the first matching portion form a relatively rotatable embedded Cooperate. In this embodiment, the first fitting part is the first rotating shaft 13 disposed on the inner wall of the nail hole 12 , and the second fitting part is the installation hole 211 disposed on the connecting part 21 .

The staple 2 has a first state and a second state, and Fig. 4 and Fig. 5 respectively show the first state and the second state of the staple 2, and the cooperation between the staple 2 and the first rotating shaft 13 in different states . As shown in Figure 4, in the initial state, the staple 2 is in the first state, the first rotating shaft 13 is embedded in the installation hole 211, and the diameter of the installation hole 211 is larger than the The diameter of the first rotating shaft 13 is such that the staple 2 can rotate around the first rotating shaft 13 . One side of the mounting hole 211 has an opening. When the staple 2 is in the first state, the opening direction of the installation hole 211 is toward the proximal side of the stapler, that is, the installation hole 211 opens along the S1 direction. As shown in FIG. 6 , the firing block 4 includes a pusher portion 41 for driving the staples 2 . When the stapler is firing, when the firing block 4 moves from the proximal end side to the distal end side of the staple cartridge 1, the pusher portion 41 of the firing block 4 contacts the nail crown 23 of the staple 2 and drives the The staple 2 rotates (in the viewing angle of FIG. 4 , the staple 22 of the staple 2 rotates clockwise), and the staple 2 protrudes from the staple hole 12 and is received by the anvil ( FIG. 4 ). (not shown in ) gradually closes to the connecting portion 21, so that the staple 2 reaches the second state as shown in FIG. 5 .

As shown in FIG. 5 , when the staple 2 is in the second state, the opening direction of the installation hole 211 faces downward. When the firing block 4 continues to move toward the distal side of the staple cartridge 1, the pusher portion 41 of the firing block 4 continues to drive the staples 2, and the firing block 4 drives the staples 2 upward. As the opening direction of the installation hole 211 faces downward, the installation hole 211 of the staple 2 can be separated from the first rotating shaft 13 at the opening. Therefore, the staple cartridge 1 and the staples 2 in the present invention form a relatively rotatable and detachable fit through the embedding combination of the first rotating shaft 13 and the installation hole 211. The staple cartridge 1 and the staples 2 The matching structure is simple, and when the stapler is fired, the staples 2 are driven by the firing block 4 to rotate and separate from the staple cartridge 1, which avoids the situation that the staples 2 are stuck and cannot be separated from the staple cartridge 1, and improves the operation efficiency. Effect.

In the present invention, the distal side and the proximal side are relative to the operator, the end closer to the operator is the proximal side, and the end farther away from the operator, that is, the end closer to the operation state is the far side. End side, the direction along the axis of the stapler is the axial direction, that is, the direction from the distal side to the proximal side of the stapler, or the direction from the proximal side to the distal side of the stapler. For example, in the viewing angle of FIG. 1 , for the staple cartridge 1 , the distal side is the left side, and the proximal side is the right side. The S1 direction is the direction from the distal side to the proximal side of the stapler, define the S1 direction or the direction opposite to the S1 direction as the axial direction of the stapler, define the S2 direction in Figure 14 as the width direction, and define the S3 direction in Figure 15 The direction is the height direction, that is, the up-down direction.

As shown in FIG. 3 , in this embodiment, the height of the highest point of the first rotating shaft 13 is lower than the height of the staple cartridge surface 11 , and as shown in FIG. 1 , when the staple 2 is in the first In this state, the connecting portion 21 of the staple 2 will not protrude from the cartridge surface 11 . In the first state, the height of the highest point of the nail feet 22 of the staples 2 is also lower than the height of the cartridge surface 11, so that the nail feet 22 of the staples 2 will not protrude beyond the Describe the surface of the staple cartridge surface 11. Therefore, when the staple 2 is in the first state, the staple 2 is located inside the staple hole 12 as a whole, and there is no part exposed outside the staple hole 12, so as to avoid contact with tissue. Scratch tissue.

As shown in Figures 2 to 4, in this embodiment, the mounting hole 211 is a through hole penetrating the two side walls of the connecting portion 21, and the two ends of the first rotating shaft 13 are respectively connected to the nail holes. The inner walls on both sides of 12, that is, the length of the first rotating shaft 13 along the direction S2 is substantially equal to the distance between the inner walls on both sides of the nail hole 12 along the direction S1. In another alternative embodiment, the installation hole 211 may also be a blind hole opened on one side wall or two side walls of the connecting portion 21 . The length of the first rotating shaft 13 along the S2 direction may be smaller than the distance between the inner walls on both sides of the nail hole 12 along the S1 direction, that is, one end may be connected to the inner wall of one side of the nail hole 12 along the S1 direction, and the other end may be suspended. . The first rotating shaft 13 may be provided on only one side, or the first rotating shaft 13 may be provided on both sides.

As shown in FIGS. 3-5 , in this embodiment, the installation hole 211 is a round hole, and the first rotating shaft 13 is a cylindrical rotating shaft. In other alternative implementations, the installation hole 211 may also be an oval hole, or a hole with a part of an arc surface and a part of a straight surface, and the part of the arc surface serves as a guiding part when the staple 2 rotates. The first rotating shaft 13 may also be in other shapes, such as cylinders with cross-sections such as ellipse, rounded rectangle, sector, and semicircle.

As shown in FIGS. 7 to 9 , they are structural schematic diagrams of the cooperation between the staple 2 and the first rotating shaft 13 according to the second embodiment of the present invention. Fig. 7 and Fig. 8 respectively show the structure that the staple 2 of the second embodiment cooperates with the first rotating shaft 13 in the first state and the second state. FIG. 9 shows the cross-sectional structure of the first rotating shaft 13 in this second embodiment. The difference between the second embodiment and the first embodiment is that the shape of the first rotating shaft 13 is different. In the second embodiment, the first rotating shaft 13 includes two opposite first outer walls 131 and two opposite second outer walls 132, and the two second outer walls 132 are located on the first outer walls respectively. 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 toward the proximal side, and the opening of the mounting hole 211 is aligned with the first outer wall 131 relatively. As shown in FIG. 8 , when the staple 2 is in the second state, the opening direction of the installation hole 211 is downward, and the opening of the installation 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 viewing angle of FIG. 9 , the two first outer walls 131 are the left and right side walls of the first rotating shaft 13 , and the two second outer walls 132 are the upper and lower side walls of the first rotating shaft 13 .

As shown in Figures 7-9, in this embodiment, the second outer wall 132 is a circular arc surface to match the installation hole 211, when the staple 2 rotates from the first state to the second In the state, the second outer wall 132 guides the rotational movement of the staple 2 .

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. Moreover, as shown in FIG. 7 , the distance w2 between the two second outer walls 132 is greater than the opening distance w1 of the installation hole 211 , so as to ensure that the staple 2 cooperates with the first rotating shaft 13 in the first state. stability, to prevent the installation hole 211 of the staple 2 from breaking away from the first rotating shaft 13 from the opening when the stapler is not fired. 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 installation hole 211 , so that when the staple 2 is in the second state, it can be placed on the firing block 4 Under the action of the pusher portion 41 of the stapler 2, the staple 2 can move upwards and disengage from the first rotating shaft 13 at the opening.

As shown in FIGS. 10 to 16 , they are schematic structural views of the staple cartridge assembly according to the third embodiment of the present invention. The first difference between the third embodiment and the first embodiment is that the structures of the first matching portion and the second matching portion are different from those of the first embodiment. As shown in Figures 10-13, in the third embodiment, the second matching part is a second rotating shaft 212 provided on the side wall of the connecting part 21, and the first matching part is connected upward to the The groove 14 on the surface 11 of the staple cartridge. In this embodiment, the staple 2 and the second shaft 212 are integrally formed. In another alternative embodiment, the second rotating shaft 212 can 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 For example, an interference fit is formed between the second rotating shaft 212 and the connecting portion 21, and when the staple 2 rotates, the second rotating shaft 212 is driven to rotate together. When the staple 2 is 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 at the same time The height of the highest point of the staple foot 22 of the staple 2 is also lower than the height of the cartridge surface 11 to avoid being exposed outside the staple hole 12 and scratching the tissue. After the staple 2 rotates into the second state, under the action of the nail pushing part 41 of the firing block 4, the second rotating shaft 212 can move upwards to connect with the upper end opening of the groove 14. The grooves 14 are separated.

As shown in FIG. 15 , in this embodiment, a nail abutting portion 16 is provided on the side of the distal end of the nail hole 12 away from the staple cartridge surface 11 . In an initial state, the nail legs 22 of the staples 2 are at least partly abutted against the staple abutting portion 16 . During the rotation process, the staple 2 at least partly resists the movement of the staple resisting portion 16 . Preferably, the shape of the nail-repelling portion 16 is an arc adapted to the shape of the nail foot. The nail foot 22 of the staple 2 can always be supported and limited during the rotation process of the staple 2 through the anvil 16, so as to protrude from the staple hole 12 smoothly and keep the staple 2 rotating The procedure does not deviate too far in the distal direction. Preferably, the bottom of the nail anvil 16 (the part where the nail anvil 16 is connected to the staple cartridge) is weakly connected to the staple cartridge 1, and the firing block 4 moves distally beyond the abutment. 16, the end of the staple abutment 16 (that is, the lower end of the staple abutment 16 shown in FIG. The rotation movement forms a barrier, and the nail anvil 16 will not break away from the staple cartridge 1 and enter the human body.

Further, as shown in FIG. 15 , the side of the staple cartridge 1 facing away from the staple cartridge surface 11 is provided with an avoidance portion 17 , the avoidance portion 17 is located at the distal end of the nail abutting portion 16 , and the nail abutment When the portion 16 is folded in the distal direction, it at least partially enters the escape portion 17 . Fig. 15 only exemplarily shows the avoidance portion 17 at the distal end of the first anvil portion 16 at the distal end, and the distal end of the other anvil portions 16 can also be provided with an avoidance portion 17, so that the anvil portion 16 is conveniently received by the staple 2 Folding in the direction of the distal end due to the active force, and giving a certain buffer to the folding of the nail abutment part 16, so as to prevent the nail abutment part 16 from breaking at the connection with the staple cartridge 1. The escape portion 17 may be a groove located at the distal end of the nail resisting portion 16 . When the firing block 4 moves to the distal end and needs to pass over the nail abutting portion 16 , the nail abutting portion 16 can avoid the escape portion 17 without hindering the movement of the firing block 4 .

The structures of the anti-nail portion 16 and the avoidance portion 17 shown in FIG. A staple abutting portion 16 is provided on the side of the distal end away from the staple cartridge surface 11 , and in an initial state, the staple legs 22 of the staples 2 are abutted against the staple abutting portion 16 . During the rotation of the staple 2, at least part of it is resisted by the staple resisting portion 16. Preferably, the bottom of the nail anvil 16 is weakly connected to the staple cartridge 1, and when the firing block 4 moves distally over the nail anvil 16, the end of the nail anvil 16 is fired by the The block 4 is driven to be folded in the distal direction without breaking away from the staple cartridge 1 . In the above-mentioned first embodiment and/or second embodiment, the side of the staple cartridge 1 facing away from the staple cartridge surface 11 may be provided with an avoidance portion 17, and the avoidance portion 17 is located at the side of the nail abutting portion 16. At the distal end, when the anti-nail portion 16 is folded toward the distal end, it at least partially enters the avoiding portion 17 . Specifically, the weak connection between the bottom of the nail anvil 16 and the staple cartridge 1 may be a weak connection formed by breaking the bottom of the nail anvil 16 or reducing its thickness.

As shown in FIG. 16 , when the staple 2 is not driven upward by the firing block 4 , the second rotating shaft 212 of the staple 2 falls into the bottom of the groove 14 . In this embodiment, the bottom surface 141 of the groove 14 is an arc surface, so as to guide the rotation movement of the staple 2 from the first state to the second state.

As shown in FIG. 11 , FIG. 12 and FIG. 15 , the second difference between the third embodiment and the first embodiment is that the structure of the cartridge surface 11 is different. In the third embodiment, the staple cartridge surface 11 includes a first area 111 and a second area 112, the height of the first area 111 is higher than the height of the second area 112, so that 111 forms an upwardly protruding raised portion 15 relative to the second region 112, that is, the staple cartridge surface 11 at the position where the raised portion 15 is provided belongs to the first region 111 and is not provided with the raised portion The staple cartridge surface 11 at the position of 15 belongs to the second area 112 . When the staple 2 is in the first state, the positions of the staple foot 22 and the connecting portion 21 correspond to the distal end and the proximal end of the staple hole 12 respectively. The area of the cartridge surface 11 corresponding to the staple foot 22 and the connecting portion 21 is the first area 111, and the portion between the staple foot 22 and the connecting portion 21 is defined as the first portion 24. , the first portion 24 includes the nail crown 23 and the portion between the nail crown 23 and the nail foot 22 , and the area of the cartridge surface 11 corresponding to the first portion 24 of the staple 2 is the second area 112 . Further, the protruding portion 15 defines a nail foot groove 151 at a position corresponding to the nail foot 22 , and the nail foot groove 151 communicates with the nail hole 12 . When the staple 2 is in the first state, the staple foot 22 is located in the staple foot groove 151, and the highest point heights of the staple foot 22 and the connecting portion 21 are lower than the raised portion 15 , and the heights of the highest points of the nail foot 22 and the connecting portion 21 are both higher than the height of the second region 112 .

In this embodiment, by setting the raised portion 15, the surface of the staple cartridge 11 has a concave-convex structure, and when the staple cartridge assembly and the anvil clamp the tissue, the frictional force on the tissue is increased to prevent the tissue from collapsing during the operation. Slips or slips distally. The upper surface of the raised portion 15 is a plane, and each side of the raised portion 15 is a smooth surface with rounded corners, so as to avoid damage to the tissue when it contacts with the tissue. In addition, by setting the raised portion 15 so that the area corresponding to the staple foot 22 and the connecting portion 21 of the staple cartridge surface 11 is a high surface, when the stapler is not firing, it can better The nail foot 22 and the connecting portion 21 are hidden in the nail cartridge hole 12 to avoid contact with the tissue and scratch the tissue. And the region corresponding to the first part 24 of the staple cartridge surface 11 and the staple 2 is a low surface, when the staple cartridge assembly and the anvil clamp the tissue, it gives the tissue more sinking space, and the tissue is in the second region There can be more sinking at the position of 112, and the space between the staple cartridge assembly and the nail anvil can be better used to clamp the tissue, preventing the tissue from slipping or slipping to the distal side during the operation.

In this embodiment, the staple cartridge 1 includes a cutter groove 18 extending in the axial direction, at least one row of nail holes 12 are respectively arranged on the left and right sides of the cutter groove 18, and the nail holes 12 are symmetrical with respect to the cutter groove 18 set up. FIG. 11 and FIG. 12 exemplarily show that two rows of nail holes 12 are arranged on each side of the cutter slot 18 , and the two rows of nail holes 12 are arranged staggered along the axial direction. For the second region 112, the part corresponding to the nail foot 22 of a staple 2 communicates with the part corresponding to the connecting part 21 of the adjacent row of staples 2, so that on each side of the cutter groove 18, the The second area 112 is connected to form an axially continuous surface, so as to better adapt to the closely-arranged structure of the nail holes 12 on the staple cartridge surface 1 and reduce the requirements on the molding process of the staple cartridge surface 1 .

As shown in FIG. 17 and FIG. 18 , they are structural schematic diagrams of the staple cartridge assembly according to the fourth embodiment of the present invention. The difference between the fourth embodiment and the third embodiment is that in the fourth embodiment, one second rotating shaft 212 is provided on both sides of the connecting part 21, and the two second rotating shafts 212 are arranged coaxially The inner walls on both sides of the nail hole 12 along the axial direction are respectively provided with one of the grooves 14 correspondingly. The structure of the cartridge surface 1 of the fourth embodiment is the same as the structure of the cartridge surface 1 of the above-mentioned third embodiment. In other embodiments, the cartridge surface 1 of the fourth embodiment can also be replaced by the second embodiment. The structure of the staple cartridge surface 1 of the example adopts a whole plane staple cartridge surface.

As shown in FIGS. 19-22 , they are structural schematic diagrams of the staple cartridge assembly according to the fifth embodiment of the present invention. The fifth embodiment differs from the third embodiment in that the structure and position of the protruding portion 15 are different. In the fifth embodiment, only one protrusion 15 is provided at the distal end of the nail hole 12 . The upper surface of the raised portion 15 is the first region 111 of the cartridge surface 11, the upper surface where the raised portion 15 is not provided is the second region 112 of the cartridge surface 11, and the height of the first region 111 is higher than The height of the second area 112 . Only the area of the cartridge surface 11 corresponding to the staple foot 22 of the staple 2 is the first area. The area corresponding to the connecting portion 21 of the staple 2 and the cartridge surface 11 of the first portion 24 is the second area. Each protruding part 15 is an independent boss structure, and the upper surface of each protruding part 15 is a square with a groove (nail foot groove 151 ) on the proximal end side. As shown in FIG. 22 , when the staple 2 is in the first state, the height of the staple foot 22 of the staple 2 is lower than the height of the first region 111 and higher than the height of the second region 112 . The height of the connecting portion 21 and the crown 23 of the staple 2 is lower than that of the second region 112 . 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 communicates with the nail hole 12, and the nail foot 22 is located at the In the nail foot groove 151.

In the fifth embodiment, by setting the protruding part 15 as shown in Figure 20, when the staple cartridge assembly and the anvil clamp the tissue, the protruding part 15 can also improve the friction force on the tissue, preventing the The tissue slips or slips distally during the procedure. Each side of the raised portion 15 is also a smooth surface with rounded corners, so as to avoid damage to the tissue when it contacts with the tissue. In addition, by setting the raised portion 15, the area corresponding to the staple foot 22 of the staple cartridge surface 11 is a higher surface, and the staple foot 22 can be better hidden when the stapler is not fired. In the nail hole 12, avoid contact with the tissue and scratch the tissue.

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, a raised portion as in the fourth embodiment or a raised portion as in the fifth embodiment is set on the surface of the staple cartridge of the first embodiment, or, the surface of the staple cartridge of the second embodiment is set as The protruding part of the fourth embodiment or the protruding part of the fifth embodiment all belong to the protection scope of the present invention. In another embodiment, the second rotating shaft 212 and the groove 14 of the fourth embodiment may also be combined with the protrusion 15 of the fifth embodiment.

In the above-mentioned third to fifth embodiments, when the staple 2 is in the first state, the height of the cartridge surface 11 is different, so that the staple feet 22 and/or the connection The first area 111 where the portion 21 is located is higher than the second area 112, so that the staple 2 can accommodate more tissue in advance, which is more conducive to anastomotic shaping.

In each of the above embodiments, the staple 2 can preferably be a biocompatible staple made of a degradable material, or a degradable and bioabsorbable biocompatible staple. After being sutured on the tissue, there is no need for subsequent staple removal operations. For example, the staple 2 is made of magnesium, magnesium alloy, degradable polymer material, etc., but the present invention is not limited thereto. Further, the surface of the staple 2 can also be coated with a degradable and bioabsorbable biocompatible coating. The coating can further improve the hardness of the staple 2 and can adjust the degradation rate of the staple 2 . The coating can be, for example, an absorbable material poly-L-lactic acid (PLLA) and/or a coating of racemic poly-lactic acid (PDLLA), etc., but the present invention is not limited thereto. The overall degradation rate 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., which can improve bleeding during anastomosis. In some other embodiments, the surface of the staple 2 may be provided with a magnetic coating, and when an external magnetic field is applied, the coating will be magnetized, which can achieve the effect of strengthening the stapling strength. The external magnetic field can be an electromagnetic field, and the strength of the magnetic field can be adjusted to meet the needs of matching; it can also be a permanent magnetic field.

The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be assumed that the specific implementation of the present invention is limited to these descriptions. For those of ordinary skill in the technical field of the present invention, without departing from the concept of the present invention, some simple deduction or replacement can be made, which should be regarded as belonging to the protection scope of the present invention.

Claims

A staple cartridge assembly, characterized in that it is used for a medical stapler, the staple cartridge assembly includes:

A staple cartridge, one side surface of the staple cartridge is a staple cartridge surface, the staple cartridge surface is provided with a plurality of nail holes, and the inner wall of at least one side of the nail hole is provided with a first matching portion;

A plurality of staples, the staples are located inside the staple holes, the staples include a connecting portion, the connecting portion is provided with a second matching portion, and the second matching portion forms with the first matching portion Relatively rotatable nesting fits; and

a firing block, when the firing block moves from the proximal end side to the distal end side of the staple cartridge, the firing block drives the staple, so that the second mating portion of the staple cartridge is relative to the first mating portion The part rotates and separates from the first mating part.
The staple cartridge assembly according to claim 1, wherein the first fitting part is a first rotating shaft, and the second fitting part is a mounting hole with an opening on one side.
The staple cartridge assembly according to claim 2, wherein the staple includes a first state and a second state, and when the staple is in the first state, the opening direction of the mounting hole is toward the The direction of the proximal side of the stapler, when the staple is in the second state, the opening direction of the mounting hole is downward.
The nail cartridge assembly according to claim 2, wherein 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 located on the The two ends of the first outer wall are respectively connected between the two first outer walls.
The nail cartridge assembly according to claim 4, wherein the second outer wall is an arc surface.
The nail cartridge assembly according to claim 4, wherein the furthest distance between the two first outer walls is smaller than the opening distance of the installation hole, and the furthest distance between the two second outer walls is The distance is greater than the opening distance of the mounting hole.
The nail cartridge assembly according to claim 4, wherein the first outer wall is arranged perpendicular to the axial direction.
The staple cartridge assembly according to claim 2, wherein the height of the highest point of the first rotating shaft is lower than the height of the staple cartridge surface.
The nail cartridge assembly according to claim 2, wherein the installation hole is a blind hole opened on at least one side wall of the connection part, or the installation hole passes through both sides of the connection part through holes in the wall.
The staple cartridge assembly according to claim 1, wherein the staples further comprise staple feet, the staples have an initial first state, and when the staples are in the first state, the staples a foot is located at the distal end of the nail hole;

The cartridge surface includes a first area and a second area, the height of the first area is higher than that of the second area, so as to form an upward protrusion in the first area relative to the second area The raised portion; the raised portion is at least partially located on the distal side of the nail hole.
The staple cartridge assembly according to claim 10, wherein when the staple is in the first state, the height of the highest point of the staple foot is lower than the surface height of the protrusion; and/or, When the staple is in the first state, the height of the highest point of the staple foot is higher than the surface height of the second region.
The staple cartridge assembly according to claim 10, wherein the staple further comprises a first portion located between the connecting portion and the staple foot, and the staple cartridge surface is in contact with the staple foot and the staple foot. The area corresponding to the connecting part is the first area, and the area corresponding to the first part of the staple cartridge surface is the second area; or, the area corresponding to the staple cartridge surface and the nail foot is the first area, and the portion of the cartridge surface corresponding to the connecting portion and the first portion is the second area.
The nail cartridge assembly according to claim 12, wherein the staple cartridge is provided with a cutter groove extending in the axial direction, and on each side of the cutter groove, the second area communicates as a Axially continuous surface.
The staple cartridge assembly according to claim 12, wherein, when the staple is in the first state, the height of the highest point of the connecting portion and the height of the highest point of the staple foot are both higher than the first The surface height of the second region is lower than the surface height of the first region.
The staple cartridge assembly according to claim 10, wherein each side of the raised portion is a smooth surface with rounded corners.
The staple cartridge assembly according to claim 1, wherein a staple abutting portion is provided on a side of the distal end of the staple hole away from the staple cartridge surface, and the staple is at least partially abutted against the staple cartridge during rotation. Describe the nail part.
The staple cartridge assembly according to claim 16, wherein the bottom of the staple abutting portion is weakly connected to the staple cartridge, and when the firing block moves in the direction of the distal end and passes over the staple abutting portion, the The distal end of the anvil is turned over in the distal direction without detaching from the staple cartridge.
The staple cartridge assembly according to claim 16, wherein the side of the staple cartridge facing away from the staple cartridge surface is provided with an avoidance part, the avoidance part is located at the distal end of the nail abutment part, and the abutment part When the nail portion is turned over toward the distal end, at least part of it enters the avoiding portion.
The staple cartridge assembly according to claim 1, wherein the staples are biodegradable and biocompatible staples; and/or, the staples are bioabsorbable and biocompatible of staples.
The staple cartridge assembly according to claim 1, wherein the surface of the staples is provided with a biodegradable and bioabsorbable coating with biocompatibility; and/or, the surface of the staples is provided with With a magnetic coating, the staples are magnetized under the action of an external magnetic field.
A medical stapler, characterized by comprising the staple cartridge assembly according to any one of claims 1-20.