Staple cartridge assembly and medical stapler

Abstract

A staple cartridge assembly and a medical stapler, the staple cartridge assembly comprising a staple cartridge (1), a plurality of stapler staples (2), and a firing block (4), the staple cartridge (1) is provided with a plurality of staple holes (12), a staple cooperating portion (15) is provided on a proximal end side of the staple holes (12), the staple cooperating portion (15) includes a first connecting portion (151), and the staple cooperating portion (15) is rotatably connected to a bottom portion of a staple cartridge surface (11) via the first connecting portion (151), the plurality of stapler staples (2) include a second connecting portion (21), and a second connecting portion (21) of the staple cartridge assembly (1) and rotatably connected to the inner wall of the staple hole (12), the staple cooperating portion (15) is located on the proximal end side of the second connecting portion (21) of the staple for stapler (2), and when the firing block (4) moves from the proximal end side to the distal end side of the staple cartridge (1), the firing block (4) drives both the staple for stapler (2) and the staple cooperating portion (15) to rotate along a first direction, and drives the second connecting portion (21) of the staple for stapler (2) to move in a direction away from the staple cartridge (1) after the staple cooperating portion (15) rotates to be removed from the staple hole (12). The staple cartridge assembly has a simple structure and allows the staple for stapler (2) to be easily removed from the staple cartridge (1) after closing.

Description

[Technical field]

[0001] The present invention relates to the field of medical instruments, and more particularly to a staple cartridge assembly and a medical stapler. [Background technology]

[0002] In the prior art, medical staplers generally include an instrument platform, a firing handle movably connected to the instrument platform, and a staple head attached to the instrument platform. The staple head can be passed through a small incision in the body by a piercer to access a surgical site and perform surgery. The staple head includes a staple cartridge assembly and a staple anvil arranged oppositely. The staple cartridge assembly has a plurality of staples attached thereto. When the stapler is fired, it pushes the staples through a firing block toward the staple anvil, where they are formed closed and suture the tissue. However, when the stapler is fired, the staples may not be completely separated from the staple cartridge, which affects the surgical effect. Summary of the Invention [Problem to be solved by the invention]

[0003] In view of the problems in the prior art, it is an object of the present application to provide a staple cartridge assembly and a medical stapler that can assist in separating stapler staples from the staple cartridge after closure. [Means for solving the problem]

[0004] A staple cartridge assembly provided by an embodiment of the present application is for use in a medical stapler, the staple cartridge assembly comprising: a staple cartridge; a plurality of stapler staples; and a firing block; the staple cartridge includes a staple cartridge surface, the staple cartridge surface has a plurality of staple holes, the staple holes are provided at proximal ends thereof with a staple cooperating portion, the staple cooperating portion includes a first connecting portion, and the staple cooperating portion is rotatably connected to a bottom portion of the staple cartridge surface via the first connecting portion; the plurality of staples are located inside the staple holes, the staples include second connecting portions and are rotatably connected to an inner wall of the staple holes via the second connecting portions, and the staple cooperating portion is located on a proximal end side of the second connecting portions of the staples; When the firing block moves from the proximal end side to the distal end side of the staple cartridge, the firing block drives both the stapler staple and the staple cooperating portion to rotate along a first direction, and after the staple cooperating portion rotates, drives the second connection portion of the stapler staple to move in a direction away from the staple cartridge and disengage from the staple hole.

[0005] In some embodiments, a first cooperating portion is provided on an inner wall of at least one side of the staple hole, and a second cooperating portion is provided on a second connection portion of the stapler staple, the second cooperating portion and the first cooperating portion form a relatively rotatable and separable embedded engagement, and the staple cooperating portion is located on a proximal end side of the first cooperating portion.

[0006] In some embodiments, an avoidance space is formed between a proximal end side of the first cooperative portion and a distal end surface of the staple cooperative portion, and after the staple cooperative portion is driven by the firing block to rotate along the first direction, the staple cooperative portion at least partially enters into the avoidance space. In some embodiments, the staple-cooperating portion is at least partially located below the second connecting portion after rotation along the first direction.

[0007] In some embodiments, a height of a lowest point of the stapler staple is lower than a height of a lowest point of the staple cooperating portion, and when the firing block moves toward the distal end side, it first drives the stapler staple to rotate along the first direction, and when the stapler staple rotates to a first angle and the firing block continues to move toward the distal end side, the firing block drives the staple cooperating portion to rotate along the first direction.

[0008] In some embodiments, the staple cooperating portion is integral with the staple cartridge, the staple cooperating portion forming a weak connection between the first connecting portion and an inner wall of the staple hole.

[0009] In some embodiments, the distal end surface of the staple-cooperating portion is an inclined surface, and in an initial state, the distal end surface of the staple-cooperating portion abuts the stapler staple.

[0010] In some embodiments, the staple cooperating part does not separate from the staple cartridge after the staple cooperating part is driven by the firing block to rotate along the first direction.

[0011] In some embodiments, the proximal end surface of the staple cooperating portion is a vertical surface.

[0012] In some embodiments, an upper surface of the staple-cooperating portion is a plane parallel to the axial direction of the stapler, and / or an arcuate guide surface is formed between a lower surface of the staple-cooperating portion and a distal end surface of the staple-cooperating portion.

[0013] Embodiments of the present application further provide a medical stapler comprising a staple cartridge assembly as described above.

[0014] The staple cartridge assembly and medical stapler provided by the present application have the following advantages:

[0015] The present application provides a staple cartridge assembly for use in a medical stapler, in which when the stapler is fired, a firing block drives both the stapler staples and the staple cooperating part to rotate along a first direction, the stapler staples can be closed and formed by the action of a staple anvil, and after the stapler staples are closed, the staple cooperating part can help drive the stapler staples and the staple cartridge to separate, thus avoiding the situation where the stapler staples cannot be completely separated from the staple cartridge, and improving the surgical effect. [Brief description of the drawings]

[0016] Other features, objects and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which: [Figure 1] FIG. 2 is a structural schematic diagram of a staple cartridge assembly according to one embodiment of the present application. [Diagram 2] 1 is a structural schematic diagram of a staple cartridge assembly after removing a staple cartridge frame and a staple cartridge cover according to one embodiment of the present application. FIG. [Diagram 3] 1 is a partial perspective view of a staple cartridge assembly after removal of a staple cartridge frame and a staple cartridge cover in accordance with an embodiment of the present application; [Figure 4] FIG. 1 is a partial perspective view of a staple cartridge according to one embodiment of the present application; [Diagram 5] 1 is a top view of a staple cartridge assembly after removal of a staple cartridge frame and a staple cartridge cover in accordance with one embodiment of the present application. [Figure 6] 6 is a cross-sectional view taken along the A1-A1 direction in FIG. 5. [Figure 7]1 is a schematic diagram of a staple cooperation portion and a staple for a stapler when the staple for a stapler is not driven according to one embodiment of the present disclosure; FIG. [Figure 8] 1 is a schematic diagram illustrating cooperation between a staple cooperation portion and a staple for a stapler when the staple for a stapler is rotationally driven according to an embodiment of the present application; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Next, exemplary embodiments will be described in more detail with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided so that the present invention will be comprehensive and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same attached reference numerals in the drawings indicate the same or similar structures, and therefore repeated description thereof will be omitted.

[0018] The present application provides a staple cartridge assembly for use in a medical stapler and a medical stapler including the same. The medical stapler generally includes an instrument platform, a firing handle movably connected to the instrument platform, and a staple head attached to the instrument platform. The staple head includes a staple cartridge assembly and a staple anvil arranged oppositely. The staple cartridge assembly includes a plurality of staples, a staple cartridge for accommodating the staples, and a firing block for driving the staples. Here, the staple cartridge includes a staple cartridge surface, the staple cartridge surface is provided with a plurality of staple holes, and a staple cooperating portion is provided on a proximal end side of the staple holes, the staple cooperating portion includes a first connecting portion, and the staple cooperating portion is rotatably connected to a bottom portion of the staple cartridge surface via the first connecting portion. The plurality of stapler staples are positioned within the staple holes, the stapler staples include a second connection portion and are rotatably connected to the staple holes via the second connection portion, and the staple cooperating portion is located on the proximal end side of the second connection portion of the stapler staple.

[0019] When the firing block moves from the proximal end side to the distal end side of the staple cartridge, the firing block drives both the staple for stapler and the staple cooperating part to rotate along a first direction, and when the staple for stapler rotates, the staple foot protrudes from the staple hole and contacts the staple anvil surface of the staple anvil, and is closed and formed by the action of the staple anvil, and the distal end surface of the staple cooperating part drives the second connecting part of the staple for stapler to move in a direction away from the staple cartridge, which helps drive the staple for stapler to separate from the staple cartridge after the staple for stapler is closed, thereby avoiding a situation where the staple for stapler cannot be completely separated from the staple cartridge, and improving the surgical effect.

[0020] 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, but each specific embodiment does not limit the protection scope of the present invention.

[0021] As shown in Figs. 1 to 8, they are structural schematic diagrams of a staple cartridge assembly according to an embodiment of the present invention. As shown in Figs. 1 and 2, in this embodiment, the staple cartridge assembly includes a plurality of staples 2 for a stapler, a staple cartridge 1 for accommodating the staples 2 for a stapler, and a firing block 4 for driving the staples 2 for a stapler. One surface of the staple cartridge 1 facing the staple anvil is a staple cartridge surface 11 (in the perspective of Fig. 1, the staple cartridge surface 11 is the upper surface of the staple cartridge 1). The staple cartridge assembly further includes a staple cartridge cover (not shown) located outside the staple cartridge 1, a staple cartridge frame 3 for accommodating the staple cartridge 1 and the staple cartridge cover, and a cutter 5 located on the proximal end side of the firing block 4. The staple cartridge 1 is provided with a plurality of staple holes 12. The plurality of staples 2 are located inside the staple holes 12, and the staples 2 include a second connecting portion 21 and are rotatably connected to the inner wall of the staple holes 12 via the second connecting portion 21. A staple cooperating portion 15 is provided on the proximal end side of the staple holes 12, and the staple cooperating portion 15 includes a first connecting portion 151 and is rotatably connected to the bottom of the staple cartridge surface 11 via the first connecting portion 151, and the staple cooperating portion 15 is located on the proximal end side of the second connecting portion 21 of the staples 2. In this embodiment, the staple cooperating portion 15 is a push block connected to the bottom of the staple cartridge surface 11. Here, the bottom of the staple cartridge surface 11 refers to one side of the staple cartridge surface 11 away from the staple anvil of the stapler, and from the perspective of Figure 6, the bottom of the staple cartridge surface 11 is one side below the staple cartridge surface 11.

[0022] When the stapler is fired, driven by a cutter pusher bar, the cutter 5 drives the firing block 4 to move in a distal direction, and the firing block 4 drives both the stapler staples 2 and the staple cooperating portion 15 to rotate along a first direction, which is clockwise in the view of FIG. When the stapler staple 2 rotates, the staple feet 22 protrude from the staple holes 12 and contact the staple anvil surface of the staple anvil, and are closed and formed by the action of the staple anvil. The distal end surface 152 of the staple cooperating part 15 drives the second connecting part 21 of the stapler staple 2 to move in a direction away from the staple cartridge 1 (from the viewpoint of FIG. 2, that is, the staple cooperating part 15 drives the second connecting part 21 to move upward), which helps drive the stapler staple 2 to be separated from the staple cartridge 1 after being closed, thereby avoiding a situation in which the stapler staple 2 cannot be completely separated from the staple cartridge 1, and improving the surgical effect.

[0023] In the present application, the distal end side and the proximal end side are opposite to the operator, and the end closer to the operator is the proximal end side, and the end farther from the operator, i.e., the end closer to the surgical condition, is the distal end side. 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, from the viewpoint of FIG. 1, the left side of the staple cartridge 1 is the distal end side, and the right side is the proximal end side. The S1 direction is the direction from the proximal end side to the distal end side of the stapler, and the S1 direction or the direction opposite to the S1 direction is defined as the axial direction of the stapler, the S2 direction in FIG. 1 is defined as the height direction, i.e., the vertical direction, and the S3 direction in FIG. 1 is defined as the width direction, i.e., the horizontal direction.

[0024] As shown in Figs. 3 to 8, in this embodiment, a first cooperative part is provided on at least one side of the inner wall of the staple hole 12, and a second cooperative part is provided on the second connecting part 21 of the stapler staple 2, and the first cooperative part and the second cooperative part form a relatively rotatable and separable embedded fitting. In this embodiment, the first cooperative part is a rotating shaft 13, the second cooperative part is a mounting hole 211 with one end open, and the second connecting part 21 is rotatably sleeved to the outside of the rotating shaft 13 through the mounting hole 211. After the stapler staple 2 is closed, the opening of the mounting hole 211 rotates downward, and when the second connecting part 21 moves upward relative to the rotating shaft 13, the mounting hole 211 is separable from the rotating shaft 13 at the opening, and is thereby removed from the staple cartridge 1.

[0025] As shown in Figures 3, 4 and 8, the staple-cooperating part 15 is located on the proximal end side of the rotating shaft 13. An avoidance space 16 is formed between the proximal end side of the rotating shaft 13 and a distal end surface 152 of the staple-cooperating part 15. After the staple-cooperating part 15 is driven by the firing block 4 to rotate along the first direction, at least a part of the staple-cooperating part 15 enters the avoidance space 16. After the staple-cooperating part 15 rotates along the first direction, it is located below the second connecting part 21, and the staple 2 for the stapler can be removed from the staple hole 12 by lifting the second connecting part 21 upward.

[0026] 5 to 8 only show that the stapler staples 2 are provided in the staple holes 12 of the outermost row. In addition, in FIG. 7 and FIG. 8, the cross-sectional lines are omitted in order to clarify the fitting relationship between the respective parts. As shown in FIG. 5 to FIG. 7, the staple cooperation part 15 is rotatably connected to the proximal end inner wall of the staple hole 12 via the first connection part 151. In this embodiment, the staple cooperation part 15 is provided integrally with the staple cartridge 1, and the staple cooperation part 15 forms a weak connection between the first connection part 151 and the proximal end inner wall of the staple hole 12. The weak connection here means that when no external force is applied to the staple-cooperating part 15, the staple-cooperating part 15 is connected to the inner wall of the staple hole 12 via the first connecting part 151 and maintains the initial state as shown in FIG. 7 , and when the staple-cooperating part 15 receives a driving force in the distal end direction from the firing block 4, the staple-cooperating part 15 rotates relative to the inner wall of the staple hole 12 at the weak connection of the first connecting part 151, and the staple-cooperating part 15 is not separated from the staple cartridge 1. In another alternative embodiment, the staple-cooperating part 15 may be a separate part that is connected to the inner wall of the staple hole 12 via a rotatable connection manner. In this embodiment, the distal end surface 152 of the staple-cooperating part 15 is an inclined surface that cooperates with the proximal end surface of the stapler staple 2, and in the initial state, the distal end surface 152 of the staple-cooperating part 15 abuts against the proximal end surface of the stapler staple 2. In this embodiment, a proximal end surface 153 of the staple-cooperating portion 15 is a vertical surface that cooperates with a distal end surface of the staple pushing portion 41. An upper surface of the staple-cooperating portion 15 is a plane parallel to the staple cartridge surface 11. As shown in Figures 7 and 8, an arc-shaped guide surface 154 is formed between the lower surface of the staple-cooperating portion 15 and the distal end surface 152 of the staple-cooperating portion 15.When the staple cooperating part 15 rotates along a first direction and at least partially enters the avoidance space 16, the guide surface 154 of the staple cooperating part 15 cooperates with the side wall of the rotating shaft 13 to form a surface-to-surface cooperation, thereby avoiding interference between the rotating shaft 13 and the staple cooperating part 15, and also avoiding the formation of point-to-point or point-to-point cooperation between the staple cooperating part 15 and the rotating shaft 13.

[0027] As shown in Figs. 5 to 7, the staple for a stapler 2 further includes a staple foot 22. When no external force is applied to the staple for a stapler 2, the staple for a stapler 2 is in an initial state, and at this time, the second connection portion 21 and the staple foot 22 of the staple for a stapler 2 are located at the proximal end and the distal end of the staple hole 12, respectively, and the staple foot 22 abuts against the staple foot abutment surface 14 of the inner wall of the staple hole 12. The firing block 4 includes a staple pushing portion 41, and when the staple pushing portion 41 is driven to move toward the distal end side and contacts the staple for a stapler 2, the staple for a stapler 2 is driven to rotate at a first angle along a first direction around the rotation axis 13, and the staple foot 22 protrudes from the staple hole 12 and contacts the staple anvil surface of the staple anvil, and is closed and formed by the action of the staple anvil. As shown in FIG. 8, after the stapler staple 2 is driven by the firing block 4 to rotate at a first angle along the first direction, the second connection portion 21 and the staple foot 22 of the stapler staple 2 are both located at the proximal end of the staple hole 12, i.e., the stapler staple 2 advances to a closed state.

[0028] As shown in Fig. 8, in this embodiment, the height of the lowest point of the staple 2 for stapler is lower than the height of the lowest point of the staple cooperation part 15, and the distal end surface of the staple pushing part 41 of the firing block 4 is an inclined surface. When the firing block 4 moves to the distal end side, the staple pushing part 41 first contacts the staple 2 for stapler, and drives the staple 2 for stapler to rotate along the first direction. During the time when the staple 2 for stapler rotates from the initial state to the first angle along the first direction, the staple foot 22 of the staple 2 for stapler protrudes from the staple cartridge surface 11 and closes toward the proximal end side due to the action of the staple anvil surface, and the staple pushing part 41 of the firing block 4 does not contact the staple cooperation part 15. When the stapler staple 2 rotates to a first angle and the launching block 4 continues to move toward the distal end side, the staple pushing portion 41 of the launching block 4 contacts the staple cooperating portion 15, driving the staple cooperating portion 15 to rotate along the first direction, and the staple cooperating portion 15 acts on the proximal end of the second connecting portion 21 of the stapler staple 2 to assist in driving the stapler staple 2 to move upward, and the second connecting portion 21 is separated from the rotating shaft 13 at the opening of its mounting hole 211, thereby realizing separation of the stapler staple 2 from the staple cartridge 1.

[0029] In this embodiment, the first angle refers to an angle by which the stapler staple 2 corresponding to the staple pushing portion 41 has rotated when the staple pushing portion 41 has just contacted the staple cooperating portion 15. The magnitude of the first angle varies according to the height of the staple cooperating portion 15. Specifically, when the lowest point of the staple cooperating portion 15 is low, the staple pushing portion 41 contacts the staple cooperating portion 15 early, i.e., the first angle is relatively small, and at this time, the stapler staple 2 may not be completely closed. When the lowest point of the staple cooperating portion 15 is high, the staple pushing portion 41 contacts the staple cooperating portion 15 late, i.e., the first angle is relatively large, and at this time, the stapler staple 2 may be completely closed.

[0030] In the embodiment shown in Figs. 1 to 8, the first cooperating portion is a rotating shaft 13, and the second cooperating portion is a mounting hole 211. In another alternative embodiment, the first cooperating portion is a groove provided on the inner wall of the staple hole, the upper end opening of the groove is in communication with the staple cartridge surface, and the second cooperating portion is a rotating shaft provided on at least one side of the second connecting portion, the rotating shaft at least partially enters the groove and can rotate relative to the groove. When the stapler staple is closed and moves upward, the rotating shaft can be separated from the staple cartridge from the upper end opening of the groove. The staple cooperating portion is provided on the proximal end side of the groove and drives the second connecting portion to move upward when rotating along the first direction.

[0031] The above describes the present invention in more detail in relation to specific preferred embodiments, and it cannot be concluded that the specific embodiments of the present invention are limited to these descriptions alone. For those skilled in the art to which the present invention pertains, many simple inferences or substitutions can be made without departing from the concept of the present invention, and all of these should be considered as belonging to the protection scope of the present invention.

Claims

1. 1. A staple cartridge assembly for use in a medical stapler, comprising: a staple cartridge, a plurality of staples for a stapler, and a firing block; the staple cartridge includes a staple cartridge surface, the staple cartridge surface having a plurality of staple holes, a staple cooperating portion disposed proximally of the staple holes, the staple cooperating portion including a first connecting portion, and the staple cooperating portion rotatably connected to a bottom portion of the staple cartridge surface via the first connecting portion; the plurality of staples are located inside the staple holes, the staples include second connecting portions and are rotatably connected to an inner wall of the staple holes via the second connecting portions, and the staple cooperating portion is located on a proximal end side of the second connecting portions of the staples; When the firing block moves from the proximal end side to the distal end side of the staple cartridge, the firing block drives both the staple for the stapler and the staple cooperation part to rotate along a first direction, and drives the second connection part of the staple for the stapler to move in a direction away from the staple cartridge and to be disengaged from the staple hole after the staple cooperation part rotates. A staple cartridge assembly comprising:

2. A first cooperating portion is provided on at least one side of the inner wall of the staple hole, and a second cooperating portion is provided on a second connection portion of the stapler staple, and the second cooperating portion and the first cooperating portion form a relatively rotatable and separable embedded engagement, and the staple cooperating portion is located on a proximal end side of the first cooperating portion. The staple cartridge assembly of claim 1 .

3. An avoidance space is formed between the proximal end side of the first cooperation part and the distal end surface of the staple cooperation part, and after the staple cooperation part is driven by the firing block to rotate along the first direction, at least a part of the staple cooperation part enters into the avoidance space. The staple cartridge assembly of claim 2 .

4. After rotating along the first direction, the staple cooperation portion is at least partially located below the second connection portion. The staple cartridge assembly of claim 1 .

5. The height of the lowest point of the stapler staple is lower than the height of the lowest point of the staple cooperation part, and when the firing block moves toward the distal end side, the firing block first drives the stapler staple to rotate along the first direction, and when the stapler staple rotates to a first angle and the firing block continues to move toward the distal end side, the firing block drives the staple cooperation part to rotate along the first direction. The staple cartridge assembly of claim 1 .

6. The staple-cooperating portion is integral with the staple cartridge, the staple-cooperating portion forming a weak connection between the first connecting portion and an inner wall of the staple hole. The staple cartridge assembly of claim 1 .

7. The distal end surface of the staple cooperation portion is an inclined surface, and in an initial state, the distal end surface of the staple cooperation portion abuts against the staple for the stapler. The staple cartridge assembly of claim 1 .

8. After the staple cooperation portion is driven by the firing block to rotate along the first direction, the staple cooperation portion does not separate from the staple cartridge. The staple cartridge assembly of claim 1 .

9. The proximal end surface of the staple cooperation portion is a vertical surface. The staple cartridge assembly of claim 1 .

10. The upper surface of the staple-cooperating portion is a plane parallel to the axial direction of the stapler, and / or an arc-shaped guide surface is formed between the lower surface of the staple-cooperating portion and the distal end surface of the staple-cooperating portion. The staple cartridge assembly of claim 1 .

11. A staple cartridge assembly according to any one of claims 1 to 10. A medical stapler comprising:

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