Push broach rod assembly and surgical anastomat

Abstract

The utility model provides a push broach rod assembly and a surgical anastomat, the push broach rod assembly comprises a first push broach rod, a second push broach rod and a connecting piece, at least parts of a first matching part of the first push broach rod and a second matching part of the second push broach rod are arranged in a staggered mode in the axial direction, the connecting piece comprises at least one connecting part, and the first matching part and the second matching part are arranged in a staggered mode in the axial direction. The connecting part is arranged on the outer side of the second matching part in a sleeving manner, and at least part of the connecting part is located on the two transverse sides of the second matching part of the second push broach rod, so that the transverse displacement of the second push broach rod can be limited. According to the push broach rod assembly, the connecting piece is arranged at the connecting position of the second push broach rod and the first push broach rod to limit transverse displacement of the second push broach rod, so that deformation of the second push broach rod is limited, and the structural stability of the push broach rod assembly is improved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a knife pusher rod assembly and a surgical stapler. Background Art

[0002] In the prior art, a surgical stapler includes a stapler body, an operating handle movably connected to the stapler body, and a stapler assembly matched with the body. The stapler body includes a firing assembly and a knife pusher assembly. During surgery, tissue is placed between the anvil and the stapler of the stapler assembly, and the distance between the anvil and the stapler is adjusted to gradually clamp the tissue. Then, the firing assembly is driven by the operating handle to move the knife pusher assembly toward the distal end, so that the staples are formed at the anvil, completing the anastomosis of the tissue.

[0003] The pusher bar assembly generally includes a first pusher bar and a second pusher bar that are linked to each other, and the distal end of the second pusher bar is connected to the cutter. The second pusher bar includes a plurality of pusher blades. When the first pusher bar drives the second pusher bar to move toward the distal end, the plurality of pusher blades of the second pusher bar may separate from each other, expand outwards and deform, resulting in a decrease in driving force, affecting the firing effect of the stapler, and even possibly causing the failure of the operation. Utility Model Content

[0004] In response to the problems in the prior art, the purpose of the present application is to provide a push knife rod assembly and a surgical stapler. By setting a connecting piece at the position where the second push knife rod is connected to the first push knife rod, the deformation of the second push knife rod is limited, thereby improving the structural stability of the push knife rod assembly.

[0005] The present application embodiment provides a knife push rod assembly for a surgical stapler, the knife push rod assembly comprising:

[0006] A first knife-pushing rod, wherein a first matching portion is provided at one end of the first knife-pushing rod;

[0007] A second pusher rod, one end of which is provided with a second matching portion, the second matching portion and the first matching portion being at least partially staggered in axial direction; and

[0008] The connecting member comprises at least one connecting portion, which is sleeved on the outside of the second matching portion and at least partially located on both lateral sides of the second matching portion of the second push knife rod.

[0009] In some embodiments, the first matching portion is a first hook-shaped portion including a first groove, the second matching portion is a second hook-shaped portion including a second groove, and the first matching portion and the second matching portion are embedded with each other;

[0010] The second matching portion further includes a first arm, a second arm and a third arm surrounding the second groove, and the connecting portion is sleeved on the outer side of at least one of the first arm, the second arm and the third arm.

[0011] In some embodiments, the second knife pushing rod is located at the distal end of the first knife pushing rod, the first arm is located on the proximal side of the second groove, the second arm is located on the distal side of the second groove, the third arm is connected between the first arm and the second arm, and the connecting member includes a first connecting portion sleeved on the first arm, a second connecting portion sleeved on the second arm, and a third connecting portion sleeved on the third arm.

[0012] In some embodiments, the first connecting portion is in a ring shape surrounding the first arm.

[0013] In some embodiments, a side wall of the first connecting portion is provided with a first opening, and the first opening extends in the longitudinal direction.

[0014] In some embodiments, the second connecting portion includes a second opening facing the distal side direction, and the third connecting portion includes a third opening facing the third arm.

[0015] In some embodiments, a first connecting bridge is provided between the first connecting portion and the third connecting portion, and a second connecting bridge is provided between the second connecting portion and the third connecting portion.

[0016] In some embodiments, the highest point height of the first connecting portion is lower than or equal to the highest point height of the first arm, the highest point height of the second connecting portion is lower than or equal to the highest point height of the second arm, and the lowest point height of the third connecting portion is higher than or equal to the lowest point height of the third arm.

[0017] In some embodiments, the first hook portion also includes a fourth arm located on the distal side of the first groove, and the connecting member also includes a fourth connecting portion located on the distal side of the first connecting portion, the fourth connecting portion surrounds the fourth arm, the fourth connecting portion has a fourth opening, and the fourth opening extends longitudinally.

[0018] In some embodiments, the connecting member further includes a fifth connecting portion located above the third connecting portion, the fifth connecting portion having a fifth opening facing upward, and the fifth connecting portion is sleeved on the outside of the fourth arm.

[0019] In some embodiments, the second push blade rod includes a plurality of push blades, and the plurality of push blades extend axially and are arranged in sequence in a transverse direction.

[0020] The knife push rod assembly and surgical stapler provided by the present application have the following advantages:

[0021] The present application sets a connecting piece at the position where the second push knife rod is connected to the first push knife rod, and the connecting part of the connecting piece is at least partially located on the lateral sides of the second matching part of the second push knife rod, thereby limiting the lateral displacement of the second push knife rod. During the firing process of the stapler, the connecting piece can limit the deformation of the second push knife rod, thereby improving the structural stability of the push knife rod assembly, avoiding the driving force affected by the deformation of the second push knife rod, and improving the surgical effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings.

[0023] Figure 1 2 is a schematic structural diagram of a first pusher rod and a second pusher rod according to an embodiment of the present application;

[0024] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0025] Figure 3 It is a schematic diagram of the cooperation between the first pusher rod, the second pusher rod and the connecting member in one embodiment of the present application;

[0026] Figure 4 is a structural schematic diagram of a connecting member according to an embodiment of the present application;

[0027] Figure 5 is a structural schematic diagram of a connecting member of another embodiment of the present application;

[0028] Figure 6 is a schematic diagram of the cooperation between the first pusher rod, the second pusher rod and the connecting member in another embodiment of the present application;

[0029] Figure 7 is a structural schematic diagram of a connecting member of yet another embodiment of the present application;

[0030] Figure 8 is a schematic diagram of the cooperation between the first pusher rod, the second pusher rod and the connecting member in yet another embodiment of the present application;

[0031] Fig. 9 It is a structural schematic diagram of a connecting piece of yet another embodiment of the present application.

[0032] Reference numerals:

[0033] 1 First pusher rod 311 First opening

[0034] 11 first matching portion 32 second connecting portion

[0035] 111 first groove 321 second opening

[0036] 112 fourth arm 33 third connection portion

[0037] 2 Second pusher rod 331 Third opening

[0038] 20 Push blade 34 First connecting bridge

[0039] 21 second matching portion 35 second connecting bridge

[0040] 211 first arm 36 fourth connection portion

[0041] 212 second arm 361 fourth opening

[0042] 213 Third arm 37 Fifth connecting portion

[0043] 214 second groove 371 fifth opening

[0044] 3 Connecting piece 38 Fourth connecting bridge

[0045] 31 First connecting part 4 Cutter DETAILED DESCRIPTION

[0046] The example embodiments will now be described more fully with reference to the accompanying drawings. However, the example embodiments can be implemented in a variety of forms and should not be construed as being limited to the embodiments set forth herein; on the contrary, these embodiments are provided so that the present application will be comprehensive and complete, and the concept of the example embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their repeated descriptions will be omitted. "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 direction of the structure to fall within the scope of the present application. Although "first" or "second" etc. are used in this specification to represent certain features, they are only used to represent the function, and are not used as a limitation on the number and importance of specific features.

[0047] The present application provides a knife pusher rod assembly and a surgical stapler including the knife pusher rod assembly. The surgical stapler includes a stapler body, an operating handle movably connected to the stapler body, and a staple magazine assembly cooperating with the body. The stapler body includes a firing assembly and a knife pusher rod assembly, and the distal end of the knife pusher rod assembly is connected to a cutter. During surgery, tissue is placed between the anvil and the staple magazine of the staple magazine assembly, and the distance between the anvil and the staple magazine is adjusted to gradually clamp the tissue. Then, the firing assembly is driven by the operating handle to move the knife pusher rod assembly toward the distal end, so that the staples are formed on the anvil to complete the anastomosis of the tissue.

[0048] The push knife rod assembly includes a first push knife rod, a second push knife rod and a connecting piece. A first mating portion is provided at one end of the first push knife rod, a second mating portion is provided at one end of the second push knife rod, and the second mating portion and the first mating portion are at least partially staggered axially. The connecting piece includes at least one connecting portion, which is sleeved on the outside of the second mating portion and at least partially located on both lateral sides of the second mating portion of the second push knife rod, thereby limiting the lateral displacement of the second push knife rod. During the firing process of the stapler, the first push knife rod and the second push knife rod are driven to move toward the distal side, and the connecting piece can limit the deformation of the second push knife rod, thereby improving the structural stability of the push knife rod assembly, avoiding the influence of the driving force due to the deformation of the second push knife rod, and improving the surgical effect.

[0049] The structure of the pusher rod assembly in a specific embodiment is described below in conjunction with the accompanying drawings. It should be understood that the accompanying drawings and the following description are only examples and are not intended to limit the scope of protection of this application.

[0050] like Figures 1 to 4 As shown, in one embodiment of the present application, the push knife rod assembly includes a first push knife rod 1, a second push knife rod 2 and a connecting member 3, the second push knife rod 2 is located at the distal end of the first push knife rod 1, the proximal end of the second push knife rod 2 is axially at least partially staggered with the distal end of the first push knife rod 1, the distal end of the second push knife rod 2 is connected to the cutter 4, and the proximal end of the first push knife rod 1 is connected to the firing assembly (not shown in the figure). The second push knife rod 2 includes a plurality of push knife blades 20, and the plurality of push knife blades 20 extend axially and are arranged in sequence in the transverse direction. In the present application, the distal end and the proximal end are relative to the operator, the end away from the operator, that is, the end close to the surgical position is the distal end, and the end away from the surgical position, that is, the end close to the operator is the proximal end. Axial refers to the direction from the distal end to the proximal end or the proximal end to the distal end of the stapler, transverse refers to the width direction, and longitudinal refers to the height direction. For example, in Figure 1 In the viewing angle, the S1 direction or the direction opposite to the S1 direction is the axial direction, the S2 direction or the direction opposite to the S2 direction is the lateral direction, and the S3 direction or the direction opposite to the S3 direction is the longitudinal direction.

[0051] The first push knife rod 1 is provided with a first matching portion 11 at the distal end, and the second push knife rod 2 is provided with a second matching portion 21 at the proximal end, and the second matching portion 21 is axially fixed to the first matching portion 11. Axial fixation here means that there is no axial relative movement between the first matching portion 11 and the second matching portion 21. When the firing assembly drives the first push knife rod 1 to move in the distal direction, the first push knife rod 1 drives the second push knife rod 2 to move in the distal direction through the cooperation of the first matching portion 11 and the second matching portion 12. The connecting member 3 includes at least one connecting portion, which is sleeved on the outside of the second matching portion 21 of the second push knife rod 2 and is at least partially located on both lateral sides of the second matching portion 21 of the second push knife rod 2, thereby limiting the lateral displacement of the second push knife rod 2. During the firing process of the stapler, the first push knife rod 1 drives the second push knife rod 2 to move toward the distal side, and the connecting member 3 limits the lateral displacement of the second push knife rod 2, so that the multiple push knife blades 20 of the second push knife rod 2 will not separate from each other and expand outward, thereby effectively limiting the deformation of the second push knife rod 2, improving the structural stability of the push knife rod assembly, avoiding the influence of driving force due to the deformation of the second push knife rod 2, and improving the surgical effect.

[0052] like Figures 2 to 4As shown, the first matching portion 11 is a first hook-shaped portion including a first groove 111, the distal end of the first hook-shaped portion is a fourth arm 112, the second matching portion 21 is a second hook-shaped portion including a second groove 214, and the first matching portion 11 and the second matching portion 21 are interlocked with each other. The second matching portion 21 also includes a first arm 211, a second arm 212 and a third arm 213 surrounding the second groove 214. Specifically, the first arm 211 is located at the proximal side of the second groove 214, the second arm 212 is located at the distal side of the second groove 214, and the third arm 213 is connected between the first arm 211 and the second arm 212, that is, located below the second groove 214. Through the mutual interlocking between the first matching portion 11 and the second matching portion 21, the first pusher rod 1 and the second pusher rod 2 are arranged alternately at the connection position. The connecting member 3 includes a first connecting portion 31 sleeved on the first arm 211, a second connecting portion 32 sleeved on the second arm 212, and a third connecting portion 33 sleeved on the third arm 213. The first connecting portion 31 and the third connecting portion 33 are connected by a first connecting bridge 34, and the second connecting portion 32 and the third connecting portion 33 are connected by a second connecting bridge 35, so that the connecting member 3 is an integral structure. The connecting member 3 can be made of metal sheets, plastic sheets, etc., and the connecting member 3 can be at least partially elastic, which can make it more convenient to install the connecting member 3 on the second pusher rod 2, and also avoid applying an overly rigid restriction to the second pusher rod 2 and damaging the second pusher rod 2. However, the present application is not limited to this. In other alternative embodiments, the connecting member 3 can also be rigid, which also falls within the scope of protection of the present application.

[0053] In this embodiment, the first connecting portion 31 is annular and surrounds the first arm 211, and can be inserted into the first arm 211 from above the first arm 211. The second connecting portion 32 includes a second opening 321 facing the distal side, and the second connecting portion 32 includes two side walls respectively arranged on both sides of the second arm 212. The third connecting portion 33 includes a third opening 331 facing the third arm 213, and the third connecting portion 33 includes two side walls respectively arranged on both sides of the third arm 213. The second arm 212 can enter the interior of the second connecting portion 32 from the second opening 321 of the second connecting portion 32, and the third arm 213 can enter the interior of the third connecting portion 33 from the third opening 331 of the third connecting portion 33. The first connecting portion 31, the second connecting portion 32 and the third connecting portion 33 can respectively limit the lateral displacement of the first arm 211, the second arm 212 and the third arm 213, thereby preventing the second pusher rod 2 from opening outward at the second matching portion 21 and deforming.

[0054] like Figure 3As shown, the height of the highest point of the first connection part 31 is lower than or equal to the height of the highest point of the first arm 211, the height of the highest point of the second connection part 32 is lower than or equal to the height of the highest point of the second arm 212, and the height of the lowest point of the third connection part 33 is higher than or equal to the height of the lowest point of the third arm 213. Therefore, after the connection member 3 is installed on the second push knife rod 2, the height of the second push knife rod 2 itself will not be increased, and the cooperation between the second push knife rod 2 and the anastomosis device housing will not be affected. The internal cavity width of the first connection part 31 can be slightly larger than the lateral width of the first arm 211, the internal cavity width of the second connection part 32 is slightly larger than the lateral width of the second arm 212, and the internal cavity of the third connection part 33 is slightly larger than the lateral width of the third arm 213, leaving a certain amount of flexible deformation space for the second push knife rod 2, so that the restriction imposed by the connection member 3 on the second push knife rod 2 is too rigid. As shown Figure 3 and Figure 4 As shown, the side wall of the first connecting portion 31 is provided with a first opening 311, which extends longitudinally to form a longitudinal slit, so that the first connecting portion 31 also has a certain deformation space, so as not to impose an overly rigid restriction on the second push knife rod 2 and damage the second push knife rod 2.

[0055] like Figure 5 and Figure 6 As shown, in another embodiment of the present application, a fourth connection part 36 is provided at the distal side of the first connection part 31, and the fourth connection part 36 is annular and surrounds the fourth arm 112. The fourth connection arm can enter the annular shape from above the fourth connection part 36. By providing the fourth connection part 36, the connection between the first arm 211 and the fourth arm 112 in the axial direction can be more stably achieved. Optionally, a fourth longitudinal opening 361 is provided at the distal end of the fourth connection part 36, so that the fourth connection part 36 has a certain deformation space, so as not to apply an overly rigid force to the fourth arm 112 and damage the fourth arm 112. The fourth connection part 36 in this embodiment is connected to the distal side of the first connection part 31. In other alternative embodiments, the fourth connection part 36 can also be connected to at least one of the first connection part 31, the second connection part 32 and the third connection part 33 through a connecting bridge.

[0056] like Figure 7 and Figure 8As shown, in another embodiment of the present application, a fifth connection part 37 is provided above the third connection part 33, and a fifth opening 371 is formed above the fifth connection part 37, and the fourth arm 112 can enter from the fifth opening 371 of the fifth connection part 37, and the fifth connection part 37 includes two side walls located on both sides of the fourth arm 112. By providing the fifth connection part 37, the connection between the first arm 211 and the fourth arm 112 in the axial direction can be made more stable. Optionally, the fifth connection part 37 is connected to the first connection part 31 through a fourth connection bridge 38. In another embodiment, the fifth connection part 37 can be connected to the third connection part 33 through the fourth connection bridge 38. Alternatively, in another alternative embodiment, the fifth connection part 37 can be connected to the second connection part 32 through a connection bridge.

[0057] In the above embodiment, the first connection portion, the second connection portion and the third connection portion have the same width in the lateral direction.

[0058] The above embodiments are described by taking the example that the connecting member includes a first connecting portion, a second connecting portion and a third connecting portion. In other alternative embodiments, the connecting member may also include only two or one of the first connecting portion, the second connecting portion and the third connecting portion, which also falls within the protection scope of this application. The first connecting portion may also not adopt an annular structure, but adopt a structure similar to the second connecting portion including two side walls, which also falls within the protection scope of this application.

[0059] The above content is a further detailed description of the present application in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the present application is 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, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A push rod assembly, characterized in that: For a surgical stapler, the knife pusher rod assembly comprises: A first knife-pushing rod, wherein a first matching portion is provided at one end of the first knife-pushing rod; A second pusher rod, one end of which is provided with a second matching portion, the second matching portion and the first matching portion being at least partially staggered in axial direction; and The connecting member comprises at least one connecting portion, wherein the connecting portion is sleeved on the outside of the second matching portion and is at least partially located on two lateral sides of the second matching portion.

2. The pusher bar assembly according to claim 1, characterized in that: The first matching portion is a first hook-shaped portion including a first groove, and the second matching portion is a second hook-shaped portion including a second groove, and the first matching portion and the second matching portion are embedded with each other; The second matching portion further includes a first arm, a second arm and a third arm surrounding the second groove, and the connecting portion is sleeved on the outer side of at least one of the first arm, the second arm and the third arm.

3. The pusher bar assembly according to claim 2, characterized in that: The second knife pushing rod is located at the distal end of the first knife pushing rod, the first arm is located on the proximal side of the second groove, the second arm is located on the distal side of the second groove, the third arm is connected between the first arm and the second arm, and the connecting member includes a first connecting portion sleeved on the first arm, a second connecting portion sleeved on the second arm, and a third connecting portion sleeved on the third arm.

4. The pusher bar assembly according to claim 3, characterized in that: The first connecting portion is in a ring shape surrounding the first arm.

5. The pusher bar assembly according to claim 4, characterized in that: A first opening is formed on the side wall of the first connecting portion, and the first opening extends in the longitudinal direction.

6. The pusher bar assembly according to claim 3, characterized in that: The second connecting portion includes a second opening facing the distal end, and the third connecting portion includes a third opening facing the third arm.

7. The pusher bar assembly according to claim 3, characterized in that: A first connecting bridge is provided between the first connecting portion and the third connecting portion, and a second connecting bridge is provided between the second connecting portion and the third connecting portion.

8. The pusher bar assembly according to claim 3, characterized in that: The highest point height of the first connecting part is lower than or equal to the highest point height of the first arm, the highest point height of the second connecting part is lower than or equal to the highest point height of the second arm, and the lowest point height of the third connecting part is higher than or equal to the lowest point height of the third arm.

9. The pusher bar assembly according to claim 3, characterized in that: The first hook portion also includes a fourth arm located at the distal side of the first groove, and the connecting member also includes a fourth connecting portion located at the distal side of the first connecting portion, the fourth connecting portion surrounds the fourth arm, and the fourth connecting portion has a fourth opening, and the fourth opening extends longitudinally.

10. The pusher bar assembly according to claim 9, characterized in that: The connecting member further includes a fifth connecting portion located above the third connecting portion, the fifth connecting portion having a fifth opening facing upward, and the fifth connecting portion is sleeved on the outside of the fourth arm.

11. The pusher bar assembly according to claim 1, characterized in that: The second push blade rod includes a plurality of push blades, and the plurality of push blades extend axially and are arranged in sequence in a transverse direction.

12. A surgical stapler, characterized in that: A push knife rod assembly comprising any one of claims 1 to 11.

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