Anastomosis assembly and stapler

Abstract

The present application provides an anastomosis assembly and anastomat, the anastomosis assembly comprises a butt seat, a nail bin seat and a cutting knife. The nail bin seat is connected with the butt seat, the nail bin seat is internally provided with a nail bin, the cutting knife is connected between the butt seat and the nail bin seat, and can slide relative to the butt seat and the nail bin seat along a first direction. The cutting knife comprises a cutter head and a cutter rod connected with the cutter head, the cutter head comprises a cutter head body and a cutting edge arranged on the cutter head body. The cutter head body is provided with an upper beam and a lower beam perpendicular to the cutting edge, the cutting edge is located between the upper beam and the lower beam, and the cutting edge faces the cutter rod and is inclinedly arranged. The nail bin is internally provided with a nail pushing slider, the nail pushing slider and the cutter head abut, the upper beam can cover the highest part of the nail pushing slider when abutting, and the nail pushing slider can slide in the nail bin along the first direction. Compared with the prior art, the anastomosis assembly of the present application can ensure that the cutting is carried out after the tissue is completely clamped, has greater clamping force, and can reduce the tissue slip phenomenon during anastomosis, thereby improving the anastomosis efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to an anastomosis assembly and an anastomat, and belongs to the technical field of medical devices. BACKGROUND

[0002] A medical anastomat is a medical device frequently used in surgical operations on physiological tissues of the digestive tract. In the treatment of general surgery, an anastomat is often used to complete the cutting and suturing functions of tissues. Recently, a long nail cartridge anastomat has appeared on the market, which is specially designed for sleeve gastrectomy and vertical sleeve gastrectomy.

[0003] When a traditional anastomat is used for a gastrectomy, the cutting edge of the cutting knife is forward, and the I-beam is narrow, so the gastric tissue is cut by extrusion. However, due to the long cutting distance, the traditional cutting knife edge and narrow I-beam cutting method used in the new long nail cartridge anastomat has the risk of I-beam cracking. In addition, due to the long cutting distance, gastric tissue slippage often occurs during the anastomosis process, which causes the titanium nail to deform and close, resulting in anastomosis failure and the risk of blood leakage.

[0004] Therefore, it is necessary to improve the existing anastomat to solve the above problems. SUMMARY

[0005] The present application relates to an anastomosis assembly and an anastomat, and belongs to the technical field of medical devices.

[0006] To achieve the above-mentioned purpose, the present application provides an anastomosis assembly, comprising:

[0007] a nail abutting seat;

[0008] a nail cartridge seat connected with the nail abutting seat, the nail cartridge seat being internally provided with a nail cartridge;

[0009] a cutting knife connected between the nail abutting seat and the nail cartridge seat and being capable of sliding in a first direction relative to the nail abutting seat and the nail cartridge seat, the cutting knife comprising a knife head and a knife rod connected with the knife head, the knife head comprising a knife head body and a cutting edge provided on the knife head body;

[0010] wherein the knife head body is provided with an upper beam and a lower beam perpendicular to the cutting edge, the cutting edge being located between the upper beam and the lower beam, and the cutting edge facing the knife rod and being obliquely arranged, the nail cartridge being internally provided with a nail pushing slider, the nail pushing slider abutting against the knife head, the upper beam being capable of covering the highest part of the nail pushing slider when abutting, and the nail pushing slider being capable of sliding in the first direction inside the nail cartridge.

[0011] As a further improvement of the present application, the upper beam and the lower beam are substantially rectangular in shape, and in the first direction, the length of the upper beam is 7-13 mm, the length of the lower beam is less than that of the upper beam, and the width of the upper beam and the lower beam is 6-10 mm.

[0012] As a further improvement of the present application, the cutting edge is arranged close to the upper beam, and the inclination angle of the cutting edge relative to the cutting rod is 30°-45°.

[0013] As a further improvement of the present application, the anvil seat is provided with a first sliding groove extending in the first direction, the upper beam is accommodated in the first sliding groove and can slide along the first sliding groove, the cartridge seat is provided with a second sliding groove extending in the first direction, and the lower beam is accommodated in the second sliding groove and can slide along the second sliding groove.

[0014] As a further improvement of the present application, the cartridge seat comprises a seat body, the cartridge is located in the seat body, and a tool travel groove extending in the first direction is arranged at the middle position of the cartridge, and the cutting tool part is partially accommodated in the tool travel groove and can slide along the tool travel groove.

[0015] As a further improvement of the present application, the pusher sliding block is connected to the side of the cutter head away from the cutting edge and can slide along the first direction with the cutter head, the cartridge is provided with a plurality of pushers connected with anastomosis nails, and the pusher sliding block cooperates with the pushers to push the anastomosis nails to move towards the anvil seat for anastomosis.

[0016] As a further improvement of the present application, the first end of the anvil seat and the first end of the cartridge seat are rotationally connected through a rotating shaft, and the second end of the anvil seat and the second end of the cartridge seat are configured to be able to approach or move away from each other to control the closing or opening of the anvil seat and the cartridge seat.

[0017] As a further improvement of the present application, the anastomosis assembly further comprises a lifting arm, and the two ends of the lifting arm are respectively connected to the second end of the anvil seat and the second end of the cartridge seat.

[0018] As a further improvement of the present application, the second end of the anvil seat is provided with a first guide groove, the second end of the cartridge seat is provided with a second guide groove, and the two ends of the lifting arm are respectively provided with guide shafts which are correspondingly and slidingly arranged in the first guide groove and the second guide groove.

[0019] Another object of the present application is to provide an anastomat with the above-mentioned anastomosis assembly.

[0020] To achieve the above-mentioned objects, the present application provides an anastomat comprising the above-mentioned anastomosis assembly.

[0021] The beneficial effects of the present application are: the anastomosis assembly of the present application sets the upper beam and the lower beam perpendicular to the blade on the cutter head body, and sets the blade to face the cutter bar and to be inclined, so that the upper beam and the lower beam can first clamp the tissue completely and then cut it with the blade, having greater clamping force. In addition, when the push nail slider and the cutter head abut, the upper beam can cover the highest part of the push nail slider, and the push nail slider can slide along the first direction inside the nail cartridge, so as to reduce the tissue slip phenomenon during the anastomosis process and improve the anastomosis efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic diagram of the three-dimensional structure of the anastomosis assembly of the present application.

[0023] Figure 2 is Figure 1 the exploded view.

[0024] Figure 3 is Figure 1 the cross-sectional view.

[0025] Figure 4 is Figure 3 the enlarged view of circle A in

[0026] Figure 5 is Figure 2 the schematic diagram of the three-dimensional structure of the cutter head in

[0027] Figure 6 is Figure 2 the schematic diagram of the three-dimensional structure of the nail abutting seat in

[0028] Figure 7 is Figure 2 the schematic diagram of the three-dimensional structure of the nail cartridge seat in

[0029] Figure 8 is Figure 3 the assembly view of the cutting knife and the push nail slider in

[0030] Figure 9 is Figure 2 the schematic diagram of the three-dimensional structure of the push nail slider in DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be described in detail below in combination with the drawings and specific embodiments.

[0032] Please refer to Figure 1As shown, the present application discloses an anastomat, which comprises an anastomosis assembly 100. The anastomosis assembly 100 comprises a staple butt 1, a staple cartridge seat 2 and a cutting knife 3. The staple cartridge seat 2 is connected with the staple butt 1 in a matching mode. The cutting knife 3 is connected between the staple butt 1 and the staple cartridge seat 2 and can slide relative to the staple butt 1 and the staple cartridge seat 2 in a first direction. The lengthwise direction of the staple butt 1 and the staple cartridge seat 2 is defined as the first direction. The anastomosis assembly 100 can ensure that the cutting is performed after the tissue is completely clamped, has greater clamping force, and can reduce the tissue slip phenomenon during the anastomosis process, thereby improving the anastomosis efficiency.

[0033] As shown, Figures 2-9 The first end of the staple butt 1 and the first end of the staple cartridge seat 2 are rotationally connected through a rotating shaft 4, and the second end of the staple butt 1 and the second end of the staple cartridge seat 2 are configured to be able to approach or move away from each other to control the closing or opening of the staple butt 1 and the staple cartridge seat 2. Among them, the first end of the staple butt 1 and the first end of the staple cartridge seat 2 are both U-shaped structures, the first end of the staple butt 1 extends into the first end of the staple cartridge seat 2, and the staple butt 1 can rotate relative to the staple cartridge seat 2 through the rotating shaft 4, so that the staple butt 1 and the staple cartridge seat 2 are closed or opened, facilitating the tissue to enter between the staple butt 1 and the staple cartridge seat 2, and cutting and anastomosis after clamping the tissue.

[0034] The cutting knife 3 comprises a knife head 31 and a knife rod 32 connected with the knife head 31. The knife head 31 is located between the staple butt 1 and the staple cartridge seat 2, and the knife rod 32 extends in the first direction and is exposed outside the staple butt 1 and the staple cartridge seat 2. Specifically, the knife head 31 comprises a knife head body 311 and a knife edge 312 arranged on the knife head body 311, and the knife head body 311 and the knife edge 312 are integrally formed.

[0035] The knife head body 311 is provided with an upper beam 3111 and a lower beam 3112 perpendicular to the knife edge 312. The upper beam 3111 is located in the staple butt 1, and the lower beam 3112 is located in the staple cartridge seat 2, as shown. Figure 5 The upper beam 3111 and the lower beam 3112 are substantially rectangular in shape, and in the first direction, the length of the upper beam 3111 is 7-13 mm, and the length of the lower beam 3112 is less than that of the upper beam 3111. The width of the upper beam 3111 and the lower beam 3112 is 6-10 mm, preferably 7 mm.

[0036] In the embodiment, the upper beam 3111 and the lower beam 3112 are longer and wider, which can provide greater clamping force after the nail abutting seat 1 and the nail cartridge seat 2 are closed, so that the nail abutting seat 1 and the nail cartridge seat 2 are kept in a closed state. The height between the upper beam 3111 and the lower beam 3112 is about 10-15 mm, preferably 12 mm.

[0037] The blade 312 is located between the upper beam 3111 and the lower beam 3112 and faces the knife rod 32 and is inclinedly arranged. Among them, the blade 312 is arranged close to the upper beam 3111, and the knife rod 32 is arranged close to the lower beam 3112. It can be understood that in the initial state, the knife head 31 is located at the first end of the nail abutting seat 1 and the nail cartridge seat 2, the knife rod 32 extends from the knife head 31 to the second end of the nail abutting seat 1 and the nail cartridge seat 2, and the tissue is located on the side of the knife head 31 close to the knife rod 32. When the stapler cuts, the blade 312 on the knife head 31 is cut by pulling the knife rod 32.

[0038] Preferably, the inclination angle of the blade 312 relative to the knife rod 32 is 30°-45°. The blade 312 is inclined toward the knife rod 32, and the blade 312 is a bevel, which can limit the tissue below the blade 312 when cutting the tissue, thereby improving the cutting efficiency.

[0039] As shown in Figure 6 and Figure 7 In the embodiment, the nail abutting seat 1 is provided with a first sliding groove 11 extending in the first direction, and the upper beam 3111 is accommodated in the first sliding groove 11 and can slide along the first sliding groove 11. The nail cartridge seat 2 is provided with a second sliding groove 21 extending in the first direction, and the lower beam 3112 is accommodated in the second sliding groove 21 and can slide along the second sliding groove 21.

[0040] Preferably, the first sliding groove 11 is located at the middle position of the nail abutting seat 1, and the second sliding groove 21 is located at the middle position of the nail cartridge seat 2. The first sliding groove 11 and the second sliding groove 21 not only play a guiding role for the cutting knife 3, but also can limit the cutting knife 3 when cutting, so as to avoid the shaking of the knife head 31 and improve the cutting stability.

[0041] In the embodiment, the lower beam 3112 is always accommodated in the second sliding groove 21, and the first end of the nail abutting seat 1 is provided with a receiving groove 12 communicating with the first sliding groove 11.

[0042] In the initial state, the upper beam 3111 is accommodated in the accommodation groove 12. At this time, the anvil seat 1 can rotate relative to the cartridge seat 2 to open the anvil seat 1 and the cartridge seat 2, so as to facilitate the entry of the tissue. Then, the anvil seat 1 and the cartridge seat 2 are controlled to be closed. At this time, the knife rod 32 is pulled, the upper beam 3111 enters the first sliding groove 11, further limits the relative position of the anvil seat 1 and the cartridge seat 2, and makes the anvil seat 1 and the cartridge seat 2 maintain the closed state. At the same time, due to the widened and lengthened arrangement of the upper beam 3111 and the lower beam 3112, it can be ensured that the tissue is cut after being clamped completely, a greater clamping force is provided for the anastomosis assembly 100, and the tissue slippage phenomenon can be reduced during the anastomosis process, thereby improving the anastomosis efficiency.

[0043] As shown in Figure 7 and Figure 8 The cartridge seat 2 includes a seat body 22 and a cartridge 23 located in the seat body 22. The seat body 22 is a U-shaped structure, the second sliding groove 21 is located at the bottom of the seat body 22, and the cartridge 23 is located outside the second sliding groove 21. The cartridge 23 is provided with a tool travel groove 231 extending in the first direction at the middle position, and the cutting knife 3 is partially accommodated in the tool travel groove 231 and can slide along the tool travel groove 231. The tool travel groove 231 is arranged in alignment with the second sliding groove 21, and the knife rod 32 slides in the tool travel groove 231. The first end of the cartridge 23 is connected with the rotating shaft 4 to limit the cartridge 23 in the first direction.

[0044] The cartridge seat 2 is provided with a push nail sliding block 24 abutting against the tool head 31. The push nail sliding block 24 is located in the seat body 22 and between the cartridge 23 and the second sliding groove 21, that is, the push nail sliding block 24 is located in the cartridge 23. In this embodiment, the push nail sliding block 24 can slide along the first direction inside the cartridge 23 following the tool head 31. Specifically, the push nail sliding block 24 is located in front of the blade 312 facing the knife rod 32. The push nail sliding block 24 is clamped on the side of the tool head 31 away from the blade 312, that is, the push nail sliding block 24 is arranged close to the lower beam 3112, and the knife rod 32 is in contact with the push nail sliding block 24. Preferably, the push nail sliding block 24 is located on and slides on the outer wall surface of the second sliding groove 21. The cartridge 23 is provided with a plurality of push nailers 233 connected with anastomosis nails 232, and the push nail sliding block 24 slides along the first direction to cooperate with the push nailers 233 to push the anastomosis nails 232 to move towards the anvil seat 1 for anastomosis.

[0045] As shown in Figure 4 and Figure 9As shown, the upper beam 3111 can cover the highest part of the pusher slider 24 when the pusher slider 24 and the knife head 31 abut. That is, the upper beam 3111 extends to the outside of the highest part of the pusher slider 24 in the first direction. Specifically, the pusher slider 24 includes a clamping portion 241 and two pusher portions 242 arranged on the clamping portion 241. The clamping portion 241 is clamped on the knife head body 311 and slides on the outer wall surface of the second sliding groove 21. In this embodiment, the side of the clamping portion 241 facing the second sliding groove 21 is provided with a protruding sliding rib 2413 extending in the first direction and in contact with the outer wall surface of the second sliding groove 21. The sliding rib 2413 can reduce the contact area between the pusher slider 24 and the outer wall surface of the second sliding groove 21, so that the pusher slider 24 slides more smoothly and with less effort.

[0046] The clamping portion 241 is provided with a clamping groove 2411 facing the knife head body 311 and a clamping protrusion 2412 located on the side of the clamping groove away from the knife head body 311. The knife head body 311 is partially accommodated in the clamping groove 2411 and abuts against the clamping protrusion, realizing the abutting connection of the pusher slider 24 and the knife head 31. The two pusher portions 242 are symmetrically arranged on both sides of the knife head body 311, and the knife rod 32 is partially supported on the clamping portion 241. Preferably, the knife rod 32 is provided with an accommodation groove (not numbered) for accommodating the clamping portion 241 and the clamping protrusion 2412, so that the knife rod 32 can be closer to the second sliding groove 21, improving the running stability of the cutting knife 3.

[0047] The highest part of the pusher slider 24 is arranged at the pusher portion 242, which is provided with a forming surface 2421 and a pusher inclined surface 2422 connected to the forming surface 2421. The pusher inclined surface 2422 gradually pushes the pusher 233 towards the anastomosis seat 1. When the forming surface 2421 contacts the pusher 233, the anastomosis needle 232 is pushed out to be anastomosed. The forming surface 2421 is the highest part of the pusher slider 24. The pusher inclined surface 2422 presents two different slope angles during extension, and the two slope angles gradually decrease towards the forming surface 2421. The pusher inclined surface 2422 stably pushes the pusher 233 to the forming surface 2421. The upper beam 3111 extends to the outside of the forming surface 2421 in the first direction, which can provide greater clamping force to the tissue to be anastomosed, thereby reducing tissue slippage during anastomosis, avoiding anastomosis failure caused by anastomosis needle 232 closure deformation, and improving anastomosis efficiency.

[0048] The anastomat performs cutting and anastomosis, specifically after the tissue enters between the anvil seat 1 and the cartridge seat 2, the knife head 31 is slid by pulling the knife rod 32, and the pusher slider 24 is slid, the pusher slider 24 gradually pushes the pusher 233 towards the anvil seat 1, and then the anastomosis needle 232 passes through the tissue and is shaped into anastomosis under the action of the anvil seat 1, and then the knife head 31 cuts the tissue after anastomosis.

[0049] In the embodiment, the first end of the anvil seat 1 and the cartridge seat 2 is also provided with an end cover 5, the end cover 5 is accommodated in the anvil seat 1 and connected with the rotating shaft 4. The end cover 5 makes the appearance transition of the anastomosis assembly 100 smoother.

[0050] In combination Figure 1 And Figure 2 As shown in the figure, the anastomosis assembly 100 also includes a lifting arm 6, which is used to control the closing or opening of the anvil seat 1 and the cartridge seat 2. The two ends of the lifting arm 6 are respectively connected with the second end of the anvil seat 1 and the second end of the cartridge seat 2. The second end of the anvil seat 1 is provided with a first guide groove 13, the second end of the cartridge seat 2 is provided with a second guide groove 25, and the two ends of the lifting arm 6 are respectively provided with guide shafts (not shown), which are correspondingly and slidably arranged in the first guide groove 13 and the second guide groove 25. The guide shafts make the lifting arm 6 slide along the first guide groove 13 and the second guide groove 25, and the lifting arm 6 will lift the second end of the anvil seat 1, so that the first end of the anvil seat 1 rotates relative to the first end of the cartridge seat 2.

[0051] In the embodiment, the second end of the anvil seat 1 partially extends into the second end of the cartridge seat 2, and the cartridge seat 2 is also provided with a slot 26 corresponding to the first guide groove 13, and the guide shaft slidably arranged in the first guide groove 13 is supported in the slot 26, thereby supporting the anvil seat 1 when the anvil seat 1 and the cartridge seat 2 are closed.

[0052] In summary, the anastomosis assembly 100 of the present application sets the knife head body 311 with upper and lower beams 3111 and 3112 perpendicular to the blade 312, and the blade 312 is arranged between the upper and lower beams 3111 and 3112, and the blade 312 faces the knife rod 32 and is inclined, which can first ensure that the tissue is completely clamped by the upper and lower beams and then cut by the blade, having greater clamping force. In addition, when the pusher slider 24 and the knife head 31 abut, the upper beam 3111 can cover the highest part of the pusher slider 24, and the pusher slider 24 can slide in the first direction inside the cartridge 23, thereby reducing tissue slippage during anastomosis and improving anastomosis efficiency.

[0053] The above examples are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalent replaced without departing from the spirit and scope of the technical solutions of the present application.

Claims

1. An anastomosis assembly comprising: The application relates to an anastomosis assembly. The anastomosis assembly comprises a nail abutting seat, a nail bin seat matched with the nail abutting seat, a cutting knife connected between the nail abutting seat and the nail bin seat and capable of sliding in a first direction relative to the nail abutting seat and the nail bin seat, wherein the cutting knife comprises a knife head and a knife rod connected with the knife head, the knife head comprises a knife head body and a knife edge arranged on the knife head body, the knife edge is located between upper and lower beams of the knife head body, the knife edge faces the knife rod and is arranged in an inclined manner, a nail pushing slider is arranged in the nail bin, the nail pushing slider and the knife head abut, the upper beam can cover the highest part of the nail pushing slider when the nail pushing slider and the knife head abut, and the nail pushing slider can slide in the first direction in the nail bin. The upper beam and the lower beam are substantially rectangular, and in the first direction, the length of the upper beam is 7-13 mm, the length of the lower beam is smaller than that of the upper beam, and the width of the upper beam and the lower beam is 6-10 mm. The knife edge is arranged close to the upper beam, and the inclination angle of the knife edge relative to the knife rod is 30-45 degrees. The nail abutting seat is internally provided with a first sliding groove extending in the first direction, the upper beam is accommodated in the first sliding groove and can slide in the first sliding groove, the nail bin seat is internally provided with a second sliding groove extending in the first direction, and the lower beam is accommodated in the second sliding groove and can slide in the second sliding groove.

2. The anastomosis assembly according to claim 1, wherein: The nail bin seat comprises a seat body, the nail bin is located in the seat body, a knife sliding groove extending in the first direction is arranged at the middle position of the nail bin, and the cutting knife is partially accommodated in the knife sliding groove and can slide in the knife sliding groove.

3. The anastomosis assembly according to claim 1, wherein: The nail pushing slider is clamped on the side of the knife head away from the knife edge and can slide in the first direction along with the knife head, a plurality of nail pushers connected with anastomosis nails are arranged in the nail bin, the nail pushing slider cooperates with the nail pushers to push the anastomosis nails to move towards the nail abutting seat for anastomosis.

4. The anastomosis assembly according to claim 1, wherein: The first end of the nail abutting seat and the first end of the nail bin seat are rotationally connected through a rotating shaft, the second end of the nail abutting seat and the second end of the nail bin seat are configured to be capable of moving close to or away from each other to control the closing or opening of the nail abutting seat and the nail bin seat.

5. The anastomosis assembly according to claim 1, wherein: The anastomosis assembly further comprises a lifting arm, and the two ends of the lifting arm are connected with the second end of the nail abutting seat and the second end of the nail bin seat respectively.

6. The anastomosis assembly of claim 5, wherein: The second end of the nail abutting seat is provided with a first guide groove, the second end of the nail bin seat is provided with a second guide groove, and the two ends of the lifting arm are respectively provided with guide shafts which are slidingly arranged in the first guide groove and the second guide groove.

7. The anastomosis assembly according to claim 1, wherein: The anastomosis assembly comprises the anastomosis assembly according to any one of claims 1-9.

8. The anastomosis assembly according to claim 7, wherein: ​ 9. The anastomosis assembly of claim 8, wherein: ​ 10. An anastomat characterized by: ​

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