Meniscus stitching instrument

Abstract

The meniscus stitching instrument comprises a driving main body and a depth limiting pipe, a pushing cavity is formed in the depth limiting pipe, a push-out rod is slidably connected into the pushing cavity, a control sliding block is slidably connected into the driving main body, and the end, close to the driving main body, of the push-out rod is fixed to the control sliding block; a control sliding seat is arranged on the control sliding block, a limiting cavity is formed in the control sliding seat, a limiting guide pin is rotationally connected into the driving body, a limiting pin is arranged at the end of the limiting guide pin and inserted into the limiting cavity, and the limiting cavity is composed of a first pushing groove, a first returning groove, a second pushing groove and a second returning groove which are formed in sequence. The limiting needle is used for pushing the push-out rod to slide out when sliding into the first push-in groove and the second push-in groove, and the limiting needle pushes the push-out rod to retract when sliding into the first return groove and the second return groove. The operation complexity of the driving mechanism and the puncture mechanism is reduced, appropriate feedback is provided for each puncture, and the convenience of meniscus suture is improved.

Description

Technical Field

[0001] This application relates to the field of medical devices, and in particular to a meniscus suture device. Background Technology

[0002] The meniscus is a crescent-shaped cartilage located between the femur and tibia in the knee joint. Its edges are thicker and tightly connected to the joint capsule, while the center is thinner and somewhat free. A normal meniscus increases the tibial condyle depression and cushions the medial and lateral femoral condyles, thereby increasing joint stability and providing shock absorption.

[0003] In existing technology, when there is a tear in the posterior horn of the meniscus, medical personnel use a meniscus suturing device to first use a driving component to push and puncture one side of the meniscus tear, thereby activating the first implant to attach to the posterior wall of the meniscus. After the first implant is successfully attached, the meniscus suturing device is removed, and another driving component is used to push and puncture the other side of the meniscus tear again to activate the second implant. Similarly, the second implant is attached to the posterior wall of the meniscus. Finally, the suture is tightened to secure the two implants, completing the meniscus suturing.

[0004] Regarding the aforementioned existing technologies, the implants are deployed by being driven by multiple driving components, each driving component individually pushing each implant. As a result, the driving and puncture mechanisms of the existing technologies are relatively complex to operate, do not meet ergonomic requirements, cannot provide appropriate feedback, and may lead to operator misoperation. Summary of the Invention

[0005] To reduce the complexity of operating the drive and puncture mechanisms, provide appropriate feedback for each puncture, and improve the convenience of meniscus suturing, this application provides a meniscus suturing device.

[0006] The meniscus suture device provided in this application adopts the following technical solution: The device includes a driving body and a depth-limiting tube. The depth-limiting tube has a pushing cavity, and an ejector rod is slidably connected within the pushing cavity. An installation cavity, communicating with the pushing cavity, is located at the end of the depth-limiting tube furthest from the driving body. The installation cavity is used to install several implants. A control slider is slidably connected within the driving body. The end of the ejector rod near the driving body is fixed to the control slider. A control slide seat is provided on the control slider. A limiting cavity is formed within the control slide seat. A limiting guide pin is rotatably connected within the driving body. A limiting pin is provided at the end of the limiting guide pin and is inserted into the limiting cavity. The limiting cavity consists of a first pushing groove, a first retraction groove, a second pushing groove, and a second retraction groove, opened sequentially. When the limiting pin slides into the first pushing groove and the second pushing groove, it pushes the ejector rod out, and simultaneously, the implant penetrates into the meniscus. When the limiting pin slides into the first retraction groove and the second retraction groove, the pushing ejector rod retracts. A tension spring is provided within the driving body to drive the control slider back.

[0007] By adopting the above technical solution, during use, medical personnel can drive the movement of the push rod by sliding the control slider, thereby positioning the limiting needle in the first advancement groove, allowing the implant to puncture into the meniscus. Controlling the slider to retract inward places the limiting needle in the first return groove. A second push of the control slider positions the limiting needle in the second advancement groove, pushing the implant into the meniscus. During retrieval, the limiting needle slides into the second return groove. The first and second implants are connected by a suture, thus achieving meniscus suturing. This design, with the push rod reciprocating in a pre-set relative motion cycle with the limiting groove, ensures that the implants are deployed sequentially, avoiding user error. This allows for more precise implant puncture, improving puncture safety; and using a single drive device for multiple punctures reduces the complexity of the device, increasing its convenience.

[0008] Preferably, the depths of the first push groove, the first retraction groove, the second push groove, and the second retraction groove all gradually decrease along the sliding direction of the limiting pin, and there is a height difference between the beginning and end of adjacent first push grooves, first retraction grooves, second push grooves, and second retraction grooves.

[0009] By adopting the above technical solution and using the height difference design, the limiting needle can be limited during the sliding process, reducing the reverse movement of the limiting needle and ensuring that the limiting needle moves in one direction within the limiting cavity. This improves the convenience and safety of implant puncture. Furthermore, when the limiting needle moves, it will generate vibration and sound in the stepped structure to remind the user that the implant has been deployed as required. At this time, the force can be canceled to ensure the safety of using the suture device.

[0010] Preferably, the drive body is provided with a plurality of limiting slide plates, and the control slider has a limiting groove on its side wall that cooperates with the sliding of the limiting slide plates.

[0011] By adopting the above technical solution, the limiting slide plate and the limiting slide groove work together to restrict the control slider, ensuring the stability of the control slider's sliding, thereby enabling the implant to be injected more accurately and stably.

[0012] Preferably, the driving body is provided with a needle seat, the depth limiting tube is slidably connected to the needle seat, the needle seat has a limiting cavity, a limiting push button is slidably connected in the limiting cavity, the sliding direction of the limiting push button is consistent with the sliding direction of the push rod, the limiting push button is fixed on the depth limiting tube, and an elastic button penetrating the side wall of the needle seat is connected to the limiting push button. The side wall of the elastic button is provided with a limiting protrusion, and the side wall of the limiting cavity is provided with multiple limiting grooves, the limiting protrusion abutting against the limiting grooves.

[0013] By adopting the above technical solution, when the elastic button is pressed during use, the limiting protrusion can slide out of the limiting groove, thereby adjusting the sliding length of the depth limiting tube and the extension length of the push rod, thus improving the convenience of using the sewing machine.

[0014] Preferably, a hand grip slider is provided on the side of the control slider away from the drive body, and a grip ring is provided on the side of the hand grip slider away from the drive body.

[0015] By adopting the above technical solution, medical staff can drive the sliding control base to move during use, and then use the grip ring to limit the position, thereby improving the stability and convenience of controlling the sliding of the slider.

[0016] Preferably, the hand-held slider has a guide hole for insertion and engagement with the needle seat, the drive body has a positioning plate, and the needle seat has a positioning cavity for insertion and engagement with the positioning plate.

[0017] By adopting the above technical solution, the positioning plate and the positioning cavity can more firmly fix the needle seat and limit the control slider to ensure the stability of the control slider's sliding.

[0018] Preferably, the depth-limiting tube consists of an inner tube and an outer tube, with the outer tube covering the inner tube and the mounting cavity being formed on the inner tube.

[0019] By adopting the above technical solution and using a double-layer sleeve, the outer sleeve can better increase the thickness of the depth-limiting tube and improve the strength of the depth-limiting tube.

[0020] Preferably, the control slider has two adjustment holes, and a limit strip is provided between the two adjustment holes. The limit strip is inserted into the adjustment hole, and an adjustment spring is provided in the adjustment hole. The adjustment spring is used to pull the limit strip closer to the limit pin, and the limit strip is used to pull the limit pin closer to the control slider.

[0021] By adopting the above technical solution, the limiting strip can make the limiting needle press the limiting cavity more stably during use, thereby improving the smoothness and stability of the use of the limiting needle.

[0022] Preferably, a limiting screw ring is provided at one end of the push rod near the control slider. The limiting screw ring has a mounting hole that engages with the push rod. The side wall of the limiting screw ring has an abutment groove that communicates with the mounting hole. An abutment block is slidably connected in the abutment groove. The thickness of the abutment block gradually increases in the direction away from the control slider. The control slider has a threaded hole that engages with the limiting screw ring.

[0023] By adopting the above technical solution, when the limiting screw ring is rotated into the threaded hole, the limiting screw ring can be fixed. Then, with the cooperation of the abutment block and the threaded hole, the abutment block can press the push rod tightly, thereby improving the firmness of the push rod fixation.

[0024] Preferably, the side wall of the limiting slide is provided with a plurality of guide wheels, and the guide wheels abut against the side wall of the limiting slide groove.

[0025] By adopting the above technical solution, the use of guide wheels can make the control slider slide more smoothly and improve the stability of the control slider.

[0026] In summary, this application includes at least one of the following beneficial technical effects: 1. During use, medical personnel can drive the push rod by sliding the control slider, which positions the limiting needle in the first advance groove, allowing the implant to penetrate the meniscus. Controlling the slider to retract inward places the limiting needle in the first return groove. A second push of the control slider positions the limiting needle in the second advance groove, pushing the implant into the meniscus. During retraction, the limiting needle slides into the second return groove. The first and second implants are connected by a suture, achieving meniscus suturing. This design, with the push rod reciprocating in a pre-defined relative motion cycle with the limiting grooves, ensures the implants are deployed sequentially, preventing user error. This allows for more precise implant puncture, improving puncture safety. Furthermore, using a single drive device for multiple punctures reduces the complexity of the device and increases its convenience. 2. The height difference design can limit the movement of the limiting needle during its sliding, reducing the reverse movement of the limiting needle and ensuring that the limiting needle moves in one direction within the limiting cavity. This improves the convenience and safety of implant puncture. Furthermore, when the limiting needle moves, it will generate vibration and sound in the stepped structure to remind the user that the implant has been deployed as required. At this time, the force can be released to ensure the safety of using the suture device. 3. The limiting slide plate and the limiting slide groove work together to restrict the control slider and ensure the stability of the control slider's movement, thereby allowing the implant to be injected more accurately and stably. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of a meniscus suture device according to Embodiment 1 of this application; Figure 2 This is a schematic diagram illustrating the ejector rod structure, as shown in Embodiment 1 of this application. Figure 3 This is a schematic diagram illustrating the positioning plate structure, as shown in Embodiment 1 of this application. Figure 4 This is a schematic diagram illustrating the control slider structure, as shown in Embodiment 1 of this application. Figure 5 This is a schematic diagram illustrating the limiting push button structure, which is the main feature of Embodiment 1 of this application; Figure 6 This is a schematic diagram illustrating the main structure of the drive body in Embodiment 1 of this application; Figure 7 This is a schematic diagram illustrating the main structure of the pin seat in Embodiment 1 of this application; Figure 8 This is a schematic diagram illustrating the limiting strip structure, which is the main feature of Embodiment 2 of this application. Figure 9 This is a schematic diagram illustrating the limiting screw ring structure, which is the main feature of Embodiment 2 of this application. Reference numerals: 1. Needle base; 2. Grip ring; 3. Hand grip slider; 4. Limiting needle; 5. Limiting cavity; 51. First push groove; 52. First return groove; 53. Second push groove; 54. Second return groove; 6. Tension spring; 7. Mounting cavity; 8. Limiting slide cavity; 9. Limiting push button; 10. Elastic button; 11. Depth limiting tube; 111. Inner tube; 112. Outer tube; 12. Control slider; 13. Control slide base ; 14. Limiting guide pin; 15. Drive body; 16. Limiting slide groove; 17. Push rod; 171. Pushing cavity; 18. Limiting slide plate; 19. Guide hole; 20. Positioning cavity; 21. Positioning plate; 22. Limiting protrusion; 23. Limiting groove; 24. Guide wheel; 25. Adjusting spring; 26. Adjusting hole; 27. Limiting strip; 28. Limiting screw ring; 29. ​​Abutting block; 31. Abutting groove; 32. Threaded hole. Detailed Implementation

[0028] The following is in conjunction with the appendix Figure 1 - Figure 9 This application will be described in further detail.

[0029] This application discloses a meniscus suture device.

[0030] Example 1 Reference Figure 1 A meniscus suture device includes a drive body 15 and a depth limiting tube 11. The depth limiting tube 11 has a pushing cavity 171, which is cylindrical. A push rod 17, also cylindrical, is slidably connected within the pushing cavity 171. An installation cavity 7, rectangular in shape, is formed at the end of the depth limiting tube 11 furthest from the drive body 15 and communicates with the pushing cavity 171. A control slider 12 is slidably connected within the drive body 15. The end of the push rod 17 closest to the drive body 15 is fixed to the control slider 12. A control slide seat 13 is mounted on the control slider 12, and a limiting cavity 5 is formed within the control slide seat 13. A limiting guide needle 14 is rotatably connected within the drive body 15. A limiting needle 4, cylindrical in shape, is integrally formed at the end of the limiting guide needle 14 and is inserted into the limiting cavity 5. The limiting cavity 5 is composed of a first advancing groove 51, a first retracting groove 52, a second advancing groove 53, and a second retracting groove 54 connected end to end. The first advancing groove 51 or the second advancing groove 53 is used to push the pushing rod 17 out, allowing the two implants to be inserted into the meniscus, and the meniscus is sutured using sutures. When the limiting needle 4 slides into the first retracting groove 52 or the second retracting groove 54, the pushing rod is retracted, and a tension spring 6 is installed in the drive body 15 to drive the control slider 12 to pull back. This allows for more precise puncture of the implants, improving the safety of the puncture; and by using a single drive device for multiple punctures, the complexity of the device is reduced, and the convenience of the puncture device is improved.

[0031] The depths of the first advancing groove 51, the first retreating groove 52, the second advancing groove 53, and the second retreating groove 54 gradually decrease along the sliding direction of the limiting needle 4. There is a height difference between the beginning and end of adjacent first advancing grooves 51, first retreating grooves 52, second advancing grooves 53, and second retreating grooves 54. This ensures that the limiting needle 4 moves in one direction within the limiting cavity 5, improving the convenience and safety of implant puncture. Furthermore, as the limiting needle 4 moves, vibrations and sounds are generated in the stepped structure to remind the user that the implant has been deployed as required. At this point, the applied force can be released, ensuring the safety of using the suture device.

[0032] Multiple limiting slide plates 18 are installed inside the drive body 15, and the control slider 12 has a limiting slide groove 16 on its side wall that cooperates with the limiting slide plates 18 to slide more smoothly.

[0033] A needle holder 1 is mounted on the drive body 15. The needle holder 1 is cylindrical, and a depth limiting tube 11 is slidably connected inside the needle holder 1. A limiting cavity 8 is formed inside the needle holder 1, and a limiting push button 9 is slidably connected inside the limiting cavity 8. The sliding direction of the limiting push button 9 is the same as the sliding direction of the push rod 17. The limiting push button 9 is fixed to the depth limiting tube 11, and an elastic button 10 that penetrates the side wall of the needle holder 1 is connected to the limiting push button 9. A limiting protrusion 22 is integrally formed on the side wall of the elastic button 10. Multiple limiting grooves 23 are formed on the side wall of the limiting cavity 8. The limiting protrusion 22 abuts against the limiting grooves 23, which can adjust the extension length of the push rod 17 and improve the convenience of using the suture device.

[0034] A handgrip slider 3 is integrally formed on the side of the control slider 12 away from the drive body 15, and a grip ring 2 is fixed on the side of the handgrip slider 3 away from the drive body 15. This improves the stability and convenience of sliding the control slider 12.

[0035] The hand-held slider 3 has a guide hole 19 that engages with the needle seat 1. A positioning plate 21 is fixed on the drive body 15, and a positioning cavity 20 is provided on the needle seat 1 that engages with the positioning plate 21. This can limit the movement of the control slider 12 and ensure the stability of its sliding.

[0036] The depth limiting tube 11 is composed of an inner tube 111 and an outer tube 112. The outer tube 112 covers the inner tube 111, and the mounting cavity 7 is opened on the inner tube 111, which can better increase the thickness of the depth limiting tube 11 and improve the strength of the depth limiting tube 11.

[0037] The implementation principle of the meniscus suture device in this application embodiment is as follows: During operation, medical personnel can drive the movement of the push rod 17 by sliding the control slider 12, thereby positioning the limiting needle 4 in the first advance groove 51, allowing the implant to be inserted into the meniscus; controlling the slider 12 to retract inward, the limiting needle 4 is positioned in the first return groove 52; pushing the control slider 12 a second time, the limiting needle 4 is positioned in the second advance groove 53, pushing the implant into the meniscus; during retrieval, the limiting needle 4 slides into the second return groove 54, and the first and second implants are connected by a suture, thereby achieving meniscus suturing. This reduces the complexity of the device and improves the convenience of the puncture device.

[0038] Example 2 Reference Figure 8The difference between this embodiment and Embodiment 1 is that the control slider 12 has two adjusting holes 26, which are cylindrical holes. A limit strip 27, which is U-shaped, is installed between the two adjusting holes 26. Both ends of the limit strip 27 are inserted into the adjusting holes 26. An adjusting spring 25 is fixed inside the adjusting holes 26. The adjusting spring 25 is used to pull the limit strip 27 closer to the limit pin 4, and the limit strip 27 is used to pull the limit pin 4 closer to the control slider 12. This allows the limit pin 4 to be used more smoothly and stably.

[0039] A limiting screw ring 28 is fixed to one end of the push rod 17 near the control slider 12. The limiting screw ring 28 has a cylindrical mounting hole for insertion and engagement with the push rod 17. An abutment groove 31 communicating with the mounting hole is formed on the side wall of the limiting screw ring 28. An abutment block 29 is slidably connected within the abutment groove 31, and the thickness of the abutment block 29 gradually increases in the direction away from the control slider 12. A threaded hole 32 is formed on the control slider 12 that threadedly engages with the limiting screw ring 28.

[0040] Multiple guide wheels 24 are installed on the side wall of the limiting slide plate 18. The guide wheels 24 abut against the side wall of the limiting slide groove 16, so that the control slider 12 can slide more smoothly and improve the stability of the control slider 12.

[0041] The implementation principle of Example 2 is as follows: During the movement of the limiting pin 4, the limiting strip 27 enables the limiting pin 4 to more stably press against the limiting cavity 5. This better ensures the stability of the limiting strip 27 in use.

[0042] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A meniscus suture device, characterized in that: The device includes a driving body (15) and a depth limiting tube (11). A pushing cavity (171) is provided inside the depth limiting tube (11), and a push rod (17) is slidably connected inside the pushing cavity (171). An installation cavity (7) communicating with the pushing cavity (171) is provided at the end of the depth limiting tube (11) away from the driving body (15). The installation cavity (7) is used to install several implants. A control slider (12) is slidably connected inside the driving body (15). The end of the push rod (17) near the driving body (15) is fixed to the control slider (12). A control slide seat (13) is provided on the control slider (12), and a limit cavity (5) is provided inside the control slide seat (13). A limit cavity (5) is rotatably connected inside the driving body (15). The guide needle (14) has a limiting needle (4) at its end. The limiting needle (4) is inserted into the limiting cavity (5). The limiting cavity (5) is composed of a first push groove (51), a first retraction groove (52), a second push groove (53), and a second retraction groove (54) opened in sequence. When the limiting needle (4) slides into the first push groove (51) or the second push groove (53), it is used to push the push rod (17) out. At the same time, the implant is punctured into the meniscus. When the limiting needle (4) slides into the first retraction groove (52) or the second retraction groove (54), the push rod (17) is retracted. The drive body (15) is provided with a tension spring (6) for driving the control slider (12) to pull back.

2. The meniscus suture device according to claim 1, characterized in that: The depths of the first push groove (51), the first return groove (52), the second push groove (53), and the second return groove (54) gradually decrease along the sliding direction of the limiting pin (4), and there is a height difference between the beginning and end of adjacent first push groove (51), first return groove (52), second push groove (53), and second return groove (54).

3. The meniscus suture device according to claim 2, characterized in that: The drive body (15) is provided with a plurality of limiting slide plates (18), and the control slider (12) has a limiting groove (16) on its side wall that slides and cooperates with the limiting slide plates (18).

4. A meniscus suture device according to claim 3, characterized in that: The driving body (15) is provided with a needle seat (1), the depth limiting tube (11) is slidably connected to the needle seat (1), the needle seat (1) is provided with a limiting slide cavity (8), the limiting slide cavity (8) is slidably connected with a limiting push button (9), the sliding direction of the limiting push button (9) is consistent with the sliding direction of the push rod (17), the limiting push button (9) is fixed on the depth limiting tube (11), the limiting push button (9) is connected with an elastic button (10) that penetrates the side wall of the needle seat (1), the side wall of the elastic button (10) is provided with a limiting protrusion (22), the side wall of the limiting slide cavity (8) is provided with multiple limiting grooves (23), the limiting protrusion (22) abuts against the limiting groove (23).

5. A meniscus suture device according to claim 4, characterized in that: A hand grip slider (3) is provided on the side of the control slider (12) away from the drive body (15), and a grip ring (2) is provided on the side of the hand grip slider (3) away from the drive body (15).

6. A meniscus suture device according to claim 5, characterized in that: The hand-held slider (3) has a guide hole (19) that is inserted into the needle seat (1), the drive body (15) has a positioning plate (21), and the needle seat (1) has a positioning cavity (20) that is inserted into the positioning plate (21).

7. A meniscus suture device according to claim 1, characterized in that: The depth-limiting tube (11) is composed of an inner tube (111) and an outer tube (112), the outer tube (112) covering the inner tube (111), and the mounting cavity (7) is opened on the inner tube (111).

8. A meniscus suture device according to claim 1, characterized in that: The control slider (12) has two adjustment holes (26), and a limit strip (27) is provided between the two adjustment holes (26). The limit strip (27) is inserted into the adjustment hole (26), and an adjustment spring (25) is provided in the adjustment hole (26). The adjustment spring (25) is used to pull the limit strip (27) closer to the limit pin (4), and the limit strip (27) is used to pull the limit pin (4) closer to the control slider (12).

9. A meniscus suture device according to claim 8, characterized in that: A limiting screw ring (28) is provided at one end of the push rod (17) near the control slider (12). The limiting screw ring (28) has an installation hole that is inserted into the push rod (17). The side wall of the limiting screw ring (28) has an abutment groove (31) that communicates with the installation hole. An abutment block (29) is slidably connected in the abutment groove (31). The thickness of the abutment block (29) gradually increases in the direction away from the control slider (12). The control slider (12) has a threaded hole (32) that is threaded into the limiting screw ring (28).

10. A meniscus suture device according to claim 3, characterized in that: The side wall of the limiting slide plate (18) is provided with a plurality of guide wheels (24), and the guide wheels (24) abut against the side wall of the limiting slide groove (16).

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