Percussion piece, nail bin assembly and surgical anastomat

Abstract

The utility model provides a percussion piece, a nail bin assembly and a surgical anastomat, the percussion piece comprises at least one wedge-shaped part, each wedge-shaped part comprises a nail pushing part and a nail cutting part, the nail cutting part is located on the near-end side of the nail pushing part and protrudes upwards relative to the nail pushing part, a nail cutting surface is arranged on the side, facing the far-end direction, of the nail cutting part, and the nail cutting surface is located on the near-end side of the nail pushing part and protrudes upwards relative to the nail pushing part. The nail cutting face of at least one nail cutting part is provided with a protruding structure, and the protruding structure comprises at least one protruding part. The protruding structure is arranged on the nail cutting part of the percussion piece, the nail cutting capacity of the percussion piece is improved, the situation that the anastomosis nails cannot be completely disengaged from the nail belt body in the operation process is avoided, and therefore the operation effect is effectively improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a firing member, a staple cartridge assembly, and a surgical stapler. Background Art

[0002] In the prior art, a surgical stapler generally includes an instrument platform and a staple magazine assembly mounted on the instrument platform. The staple magazine assembly can be passed through a small incision on the body by a puncture device to approach the surgical site for surgery. The staple magazine assembly includes two clamps arranged opposite to each other, one of which is provided with a staple band and a firing block, and the staple band includes a staple band body and staples detachably connected to the staple band body. When the stapler is fired, the firing block pushes the staples outward, separates the staples from the staple band body, and staples to the tissue. However, when using existing surgical staplers, it is easy for the staples to fail to completely detach from the staple band body, causing traction damage to the tissue and affecting the surgical effect. Utility Model Content

[0003] In response to the problems in the prior art, the purpose of this application is to provide a firing member, a nail magazine assembly and a surgical stapler, which improve the nail cutting ability of the firing member and enhance the surgical effect by providing a protruding structure on the nail cutting part of the firing member.

[0004] An embodiment of the present application provides a firing member for a surgical stapler, wherein the firing member includes at least one wedge-shaped portion, each of the wedge-shaped portions including a nail pushing portion and a nail cutting portion, the nail cutting portion being located on the proximal side of the nail pushing portion and protruding upward relative to the nail pushing portion, a nail cutting surface being provided on the side of the nail cutting portion facing the distal direction, and a protruding structure being provided on the nail cutting surface of at least one of the nail cutting portions, wherein the protruding structure includes at least one protruding portion.

[0005] In some embodiments, each of the raised portions includes at least one ridge extending in a transverse direction.

[0006] In some embodiments, the protrusion is connected to both sides of the nail cutting portion in a transverse direction.

[0007] In some embodiments, the protrusion structure includes a plurality of protrusions, and the plurality of protrusions are arranged along the length direction of the nail cutting surface.

[0008] In some embodiments, the length of the protruding structure is equal to the length of the cutting surface.

[0009] In some embodiments, each of the protruding portions includes a first side wall and a second side wall, and an angle formed between the first side wall and the second side wall is less than or equal to 90°.

[0010] In some embodiments, the center line of the angle of each protrusion is inclined upward from the proximal end to the distal end.

[0011] In some embodiments, the nail cutting surface is an inclined surface, so that the distal side of the nail cutting surface is lower than the proximal side.

[0012] The embodiment of the present application further provides a staple cartridge assembly, comprising a first jaw and a second jaw, wherein the first jaw comprises:

[0013] A staple band comprising a staple band body and at least one row of staples, wherein the staples include staple connecting portions rotatably and detachably connected to the staple band body; and

[0014] The firing member is configured to be driven to move axially along the staple cartridge assembly, each wedge portion is provided corresponding to each row of staples, and the staple cutting portion is at least partially aligned axially with the staple cutting portion of the staples.

[0015] An embodiment of the present application further provides a surgical stapler, comprising the aforementioned firing member or the aforementioned staple cartridge assembly.

[0016] The firing member, staple cartridge assembly, and surgical stapler provided by the present application have the following advantages:

[0017] The present application provides a firing member for a surgical stapler. When the stapler is fired, the wedge-shaped portion of the firing member is used to drive the staples. The staple pushing portion first contacts the staples, causing the staples to rotate and close relative to the staple band body. Then the staple cutting portion contacts the staple connecting portion of the staples and separates the staple connecting portion from the staple band body, so that the staples can be separated from the staple band body and stapled to the tissue as a whole. A protruding structure is provided on the staple cutting portion of the firing member. When the protruding structure contacts the staple connecting portion, the protruding portion of the protruding structure is more likely to form stress concentration, thereby increasing the local cutting force on the staple connecting portion, making it easier for the staple connecting portion to separate from the staple band body, thereby improving the staple cutting ability of the firing member and greatly improving the surgical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings.

[0019] Figure 1 This is a schematic diagram of the cooperation between the nail band and the firing member according to one embodiment of the present application;

[0020] Figure 2 This is a schematic structural diagram of a firing member according to an embodiment of the present application;

[0021] Figure 3 This is a front view of a firing member according to an embodiment of the present application;

[0022] Figure 4 is a side view of a firing member according to an embodiment of the present application;

[0023] Figure 5 is a top view of a firing member according to an embodiment of the present application;

[0024] Figure 6 This is a schematic structural diagram of a firing member according to another embodiment of the present application;

[0025] Figure 7 This is a front view of a firing member according to another embodiment of the present application;

[0026] Figure 8 This is a schematic diagram of the cooperation between the firing member and the nail belt according to another embodiment of the present application.

[0027] Reference numerals:

[0028] 10 firing member 14 transition section

[0029] 1 Wedge-shaped portion 2 Cutter mating portion

[0030] 11 nail pushing part 30 nail belt

[0031] 12 Connecting part 3 Nail belt body

[0032] 13 staple cutting part 4 staple

[0033] 131 raised portion (Example 1) 41 nail connection portion

[0034] 132 raised portion (Example 2) DETAILED DESCRIPTION

[0035] Example embodiments will now be described more fully. However, the example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. "Or" and "or" in the specification may both mean "and" or "or". Although the terms "upper", "lower", "between", etc. may be used in this specification to describe different exemplary features and elements of the present application, these terms are used herein only for convenience, such as according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of this application. Although "first" or "second" etc. are used in this specification to indicate certain features, this is only to indicate the function and not to limit the number and importance of specific features.

[0036] To address the technical problems of the prior art, the present application provides a firing member, a stapler assembly, and a surgical stapler. The surgical stapler includes an instrument platform and a stapler assembly mounted on the instrument platform. The stapler assembly comprises a first jaw and a second jaw disposed opposite each other. The first jaw comprises a staple band and a firing member. The staple band comprises a staple band body and at least one row of staples. The staples comprise a staple connector rotatably and detachably connected to the staple band body. The firing member is configured to be driven to move axially along the stapler assembly. The firing member comprises at least one wedge-shaped portion, each wedge-shaped portion corresponding to each row of staples. Each wedge-shaped portion comprises a staple-pushing portion and a staple-cutting portion. The staple-pushing portion is configured to drive the staples in rotation, and the staple-cutting portion is configured to drive the staple connector away from the staple band body. The staple-cutting portion is located proximal to the staple-pushing portion and protrudes upward relative to the staple-pushing portion. The staple-cutting portion is at least partially aligned axially with the staple-cutting portion of the staple. The cutting portion has a cutting surface on one side facing the distal end, and at least one of the cutting surfaces has a raised structure, each of which includes at least one raised portion. By providing the raised structure on the cutting portion of the firing member, the present application makes it easier for the cutting portion to sever the connection between the staple connecting portion and the staple strip body, thereby improving the firing member's cutting capability and making it easier to separate the staples from the staple strip body, thereby effectively enhancing surgical effectiveness.

[0037] The specific structure of the firing member and the nail magazine assembly is described in detail below with reference to the accompanying drawings. The same reference numerals in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. The accompanying drawings and the following descriptions are only examples and are not intended to limit the scope of protection of this application. The distal end and the proximal end in this application are relative to the operator, the end away from the operator is the distal end, and the end close to the operator is the proximal end, where the distal end is the end closer to the surgical site. The axial direction refers to the axial direction of the nail magazine assembly, that is, the direction from the proximal end to the distal end ( Figure 1 The longitudinal direction refers to the height direction ( Figure 3 S2 direction), transverse refers to the width direction ( Figure 4 middle S3 direction).

[0038] like Figure 1 As shown, in one embodiment, the staple cartridge assembly includes a first jaw and a second jaw, and the second jaw includes a staple anvil (not shown in the figure). The first jaw includes a staple band 30 and a firing member 10, and the staple band 30 includes a staple band body 3 and multiple rows of staples 4. Each staple 4 is rotatably and detachably connected to the staple band body 3 through a staple connecting portion 41. The firing member 10 is used to drive the staples 4 to close and detach from the staple band body 3 to staple to the tissue when the stapler is fired. Figure 2As shown, the firing member 10 includes at least one wedge-shaped portion 1 and a cutter matching portion 2, and each wedge-shaped portion 1 is provided corresponding to each row of staples 4. In this embodiment, it is exemplarily shown that the firing member 10 includes four wedge-shaped portions 1, which correspond to four rows of staples 4, and the four wedge-shaped portions 1 are arranged at intervals in the transverse direction. In other embodiments, the number of wedge-shaped portions 1 can be selected and set as needed. The cutter matching portion 2 cooperates with the cutter (not shown in the figure), and when the cutter is driven to move in the distal direction, the cutter drives the firing member 10 to move in the distal direction through the cutter matching portion 2 to drive the staples 4.

[0039] like Figure 2 and Figure 3 As shown, each wedge-shaped portion 1 includes a nail pushing portion 11, a connecting portion 12 and a nail cutting portion 13 arranged in sequence from the distal end to the proximal end. The nail pushing portion 11 is used to drive the anastomosis staple 4 to rotate, and the nail cutting portion 13 is used to drive the nail connecting portion 41 to separate from the staple band body 3. Figure 1 As shown, the nail cutting portion 13 is at least partially aligned with the nail connecting portion 41 of the staple 4 in the axial direction, so that when the nail cutting portion 13 moves distally, it at least partially abuts and acts on the nail connecting portion 41. The nail cutting portion 13 is located on the proximal side of the nail pushing portion 11 and protrudes upward relative to the nail pushing portion 11. Here, "protruding upward" means that in the longitudinal direction, the highest point of the nail cutting portion 13 is higher than the highest point of the nail pushing portion 11. Figure 2 and Figure 3 As shown, the cutting portion 13 has a cutting surface on its distal side. This cutting surface is inclined so that the distal side of the cutting surface is lower than the proximal side. At least one cutting surface of the cutting portion 13 has a raised structure, including at least one raised portion 131. The raised portion 131 protrudes distally relative to the cutting surface of the cutting portion 13.

[0040] In the initial state, the anastomosis nail 4 is rotatably connected to the nail belt body 3 through the nail connecting portion 41, and the firing member 10 is located at the proximal end of the nail belt 30 and does not act on the anastomosis nail 4. When the anastomosis device is fired, the firing member 10 is driven to move in the distal direction. The nail pushing portion 11 first contacts the anastomosis nail 4, drives the anastomosis nail 4 to rotate relative to the nail belt body 3, the nail leg of the anastomosis nail 4 pierces the tissue and contacts the anvil, under the action of the anvil, the anastomosis nail 4 gradually closes, and then the cutting nail portion 13 contacts the nail connecting portion 41 of the anastomosis nail 4 and applies a cutting force to the nail connecting portion 41, so that the nail connecting portion 41 is separated from the nail belt body 3, so that the anastomosis nail 4 can be separated from the nail belt body 3 and is integrally stapled on the tissue. The present application provides a protruding structure on the cutting nail portion 13 of the firing member 10. When the protruding structure contacts the nail connecting portion 41, the protruding portion 131 of the protruding structure is more likely to form stress concentration, which improves the local cutting force of the nail connecting portion 41, so that the nail connecting portion 41 is more easily separated from the nail belt body 3, thereby improving the cutting nail capability of the firing member 10, avoiding the situation that the nail connecting portion 41 cannot be completely separated from the nail belt body 3, and greatly improving the surgical effect.

[0041] In this embodiment, the protruding portion 131 is a sawtooth-shaped sawtooth portion. Each protruding portion 131 includes a first side wall and a second side wall, and the first side wall and the second side wall form a protruding ridge extending in the transverse direction at the top end. When the cutting nail portion 13 contacts the nail connecting portion 41 of the anastomosis nail 4, the protruding ridge protruding at the top end of the protruding portion 131 first contacts the nail connecting portion 41, and applies a relatively concentrated cutting force to the nail connecting portion 41. As shown in Figure 3 The included angle between the first side wall and the second side wall of each protruding portion 131 is an acute angle, so that the top end of each protruding portion 131 forms a top end sharp angle, and the stress at the sharp angle position is more concentrated, which is beneficial to improve the cutting nail capability of the cutting nail portion 13. The angle of the acute angle is, for example, 20°-60°, but the present application is not limited thereto. After the anastomosis nail 4 is driven to rotate by the nail pushing portion 11, the nail connecting portion 41 has a certain inclination angle. The included angle center line A of each protruding portion 131 of the protruding structure is inclined upward from the proximal end to the distal end, so that the top end sharp angle of the protruding portion 131 is inclined upward, and after the nail connecting portion 41 is rotated, the protruding ridge of the protruding portion 131 can more easily contact the surface of the inclined nail connecting portion 41 after rotation. Alternatively, the included angle center line A of each protruding portion 131 is perpendicular to the extension direction of the cutting nail surface, but the present application is not limited thereto.

[0042] The number of protruding portions 131 in the protruding structure can be selected as needed. The protruding structure can cover the entire cutting nail surface of the cutting nail portion 13, or only cover part of the cutting nail surface of the cutting nail portion 13. As shown in Figures 3-5 In this embodiment, the length of the protruding structure is equal to the length of the cutting nail surface, that is, the protruding structure is provided on the entire cutting nail surface. Here, "length" refers to the measurement in the axial direction, that is, Figure 5 A transition section 14 is formed between the raised structure and the connecting portion 12. The surface of the transition section 14 can be a curved surface or an inclined plane. Figure 4 As shown, each protrusion 131 is connected to both sides of the nail cutting portion 13 in the horizontal direction, which can maximize the use of the nail cutting surface of the nail cutting portion 13. Even if there is a certain horizontal deviation between the staples and the nail cutting portion 13, the protrusion 131 can still contact the nail connecting portion. Figure 5 As shown, the raised structure in this embodiment includes multiple raised portions 131, and these raised portions 131 are arranged along the length of the nail cutting surface. When the nail connecting portion rotates to different angles, different raised portions 131 contact the nail connecting portion and apply a cutting force. In this embodiment, by providing the raised structure on the entire surface of the nail cutting surface, it is ensured that when the nail cutting portion 13 contacts the nail connecting portion 41, the top corner of at least one raised portion 131 can effectively act on the nail connecting portion 41, making it easier to separate the nail connecting portion 41 from the nail strip body 3.

[0043] Figures 6-8 FIG. 1 shows a firing member and a structure for cooperating with a nail band according to another embodiment of the present invention. Figures 6-8 As shown, this embodiment is Figures 1 to 5 The main difference between the embodiments is that the structure of the protrusion is different. Figures 6-8 As shown, the cutting surface of the nail cutting portion 13 is provided with a raised structure, which includes at least one raised portion 132. The raised portion 132 protrudes distally relative to the cutting surface of the nail cutting portion 13. In this embodiment, the raised structure includes multiple raised portions 132, each of which is a stepped portion. Each raised portion 132 includes a first sidewall and a second sidewall, each of which forms a transversely extending ridge at its top end. The multiple raised portions 132 are arranged along the length of the nail cutting portion 13.

[0044] like Figure 7 As shown, the angle between the first side wall and the second side wall of each protrusion 132 is approximately a right angle. Figure 7 and Figure 8 As shown, after the staple 4 is rotated by the staple pusher 11, the staple connecting portion 41 is tilted at a certain angle. The centerline B of the angle of each protrusion 132 of the protrusion structure tilts upward from the proximal end to the distal end. After the staple connecting portion 41 rotates, the ridges of the protrusion 132 can more easily contact the tilted surface of the staple connecting portion 41 after rotation.

[0045] The above embodiments illustrate the example of a protruding structure on the nail cutting portion of each wedge-shaped portion of the firing member. In other alternative embodiments, only the nail cutting portions of some wedge-shaped portions may be provided with a protruding structure, and the protruding structures on different nail cutting portions may have the same or different structures. For example, only the nail cutting portion of the outer wedge-shaped portion may be provided with a protruding structure, while the nail cutting surface of the nail cutting portion of the inner wedge-shaped portion may be a smooth surface; or only the nail cutting portions of the two inner wedge-shaped portions may be provided with a protruding structure, while the nail cutting surface of the nail cutting portion of the outer wedge-shaped portion may be a smooth surface; or other configurations may be selected, all of which fall within the scope of protection of this application.

[0046] The above embodiments illustrate two optional shapes and configurations for the raised portion, but these are not intended to limit the scope of protection of this application. In other alternative embodiments, the raised portion may be configured in other shapes, not limited to those listed in the above embodiments. For example, the raised portion may be configured in a shape such as a frustum, a boss, a prism, or a pyramid. Multiple raised portions may be arranged in a wavy pattern, etc. The width of the raised structure may be equal to or less than the lateral width of the cutting surface, and the length of the raised structure may be equal to or less than the axial length of the cutting surface.

[0047] The top of each protrusion can form a ridge, or a circular arc surface or a smooth surface with an area smaller than the cutting surface, which can also play a role in stress concentration. The angle formed between the first side wall and the second side wall of the protrusion can be an acute angle or a right angle as shown in the above examples, or it can be an obtuse angle. The inclination direction of the center line of the angle is not limited to the above examples, for example, it can be set to be parallel to the axial direction. Each protrusion structure can include only one protrusion, or it can include other numbers of protrusions. All of the above variations fall within the scope of protection of this application.

[0048] The above content is a further detailed description of the present application in conjunction with specific preferred embodiments, and the specific implementation of the present application cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be considered to fall within the scope of protection of the present application.

Claims

1. A firing member, characterized in that: Used in a surgical stapler, the firing member includes at least one wedge-shaped portion, each of the wedge-shaped portions includes a nail pushing portion and a nail cutting portion, the nail cutting portion is located on the proximal side of the nail pushing portion and protrudes upward relative to the nail pushing portion, and the nail cutting portion is provided with a nail cutting surface on the side facing the distal direction, and the nail cutting surface of at least one of the nail cutting portions is provided with a protruding structure, and the protruding structure includes at least one protruding portion.

2. The firing member according to claim 1, wherein: Each of the raised portions includes at least one ridge extending in the transverse direction.

3. The firing member according to claim 1, wherein: The protrusion is connected to both sides of the nail cutting portion in a transverse direction.

4. The firing member according to claim 1, wherein: The protrusion structure includes a plurality of protrusions, and the plurality of protrusions are arranged along the length direction of the nail cutting surface.

5. The firing member according to claim 1, wherein: The length of the protruding structure is equal to the length of the nail cutting surface.

6. The firing member according to claim 1, wherein: Each of the protruding portions includes a first side wall and a second side wall, and an angle formed between the first side wall and the second side wall is less than or equal to 90°.

7. The firing member according to claim 1, wherein: The center line of the angle of each protrusion is inclined upward from the proximal end to the distal end.

8. The firing member according to claim 1, wherein: The nail cutting surface is an inclined surface, so that the distal side of the nail cutting surface is lower than the proximal side.

9. A staple cartridge assembly, characterized in that: The invention comprises a first jaw and a second jaw, wherein the first jaw comprises: A staple band comprising a staple band body and at least one row of staples, wherein the staples include staple connecting portions rotatably and detachably connected to the staple band body; and The firing member according to any one of claims 1 to 8 is configured to be driven to move axially along the staple cartridge assembly, each of the wedge-shaped portions is arranged corresponding to each row of the staples, and the staple cutting portion is at least partially aligned with the staple cutting portion of the staples in the axial direction.

10. A surgical stapler, characterized in that: Includes the firing member according to any one of claims 1 to 8 or the nail magazine assembly according to claim 9.

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