Needle grasping forceps under arthroscope

Abstract

The utility model discloses needle grasping forceps under an arthroscope, which belongs to the technical field of needle grasping forceps and comprises a forceps body, a fixed forceps rod is arranged at one end of the forceps body, an extension rod is arranged at the other end of the forceps body, a fixed forceps and a movable forceps are respectively arranged at the tail end of the extension rod, a movable groove is arranged on the inner side of the middle of the forceps body, and a movable forceps rod is arranged in the movable groove. A clamping plate and a positioning plate are arranged on the opposite sides of the fixed forceps rod and the movable forceps rod, a clamping groove is formed in the bottom of the clamping plate, a clamping block is arranged at one end of the positioning plate, a pressing block is arranged at the top of the other end of the positioning plate, and a reset spring is arranged at the bottom of the pressing block. The clamping grooves in the clamping plate are matched with the clamping blocks on the positioning plate to form a clamping state, so that the fixed forceps rod and the movable forceps rod are clamped and positioned, the positioning of the movable forceps is realized, a certain labor-saving purpose is achieved without continuously applying force by a surgeon during use, and better operation of the surgeon is facilitated.

Description

Technical Field

[0001] This utility model belongs to the field of needle grasping forceps technology, specifically relating to an arthroscopic needle grasping forceps. Background Technology

[0002] Ankle sprains are very common, and one of the consequences is avulsion fracture of the lateral malleolus. Traditional treatment involves open reduction and internal fixation under anesthesia, but this is quite invasive. Minimally invasive arthroscopic reduction and percutaneous internal fixation is less invasive than traditional surgery and has become a new trend in the treatment of this condition. Under minimally invasive ankle arthroscopy, after locating the fracture fragment, a Kirschner wire or guide wire is inserted percutaneously. The Kirschner wire or guide wire penetrates the fracture fragment but does not completely exit it. Then, under arthroscopic guidance, the Kirschner wire or guide wire is pulled to reduce the fracture fragment to the lateral malleolus. After reduction, the Kirschner wire or guide wire is completely exited from the fracture fragment and then inserted back into the lateral malleolus. However, in actual surgery, lacking instruments for endoscopic traction of Kirschner wires or guide wires, we can only clamp the Kirschner wires or guide wires with hemostats or other instruments and pull them simultaneously. However, when the electric drill is used, the Kirschner wires or guide wires often slip out as they rotate, repeatedly causing difficulty in repositioning avulsed fracture fragments, prolonging the operation time, and aggravating ischemia-reperfusion injury of the affected limb.

[0003] Current arthroscopic instruments lack the ability to grasp and pull Kirschner wires or guide wires under arthroscopy. We can only use hemostats or other instruments to clamp the Kirschner wires or guide wires and pull them simultaneously. However, when drilling, the Kirschner wires or guide wires often slip out as they rotate, causing repeated slippage and making it difficult to reduce avulsed fracture fragments, prolonging the operation time, and aggravating ischemia-reperfusion injury of the affected limb. Moreover, they lack positioning function, requiring the surgeon to apply force at one end to ensure the stability of the grasp during the grasp, which is not conducive to the surgeon's operation. Therefore, we propose an arthroscopic needle grasping forceps. Utility Model Content

[0004] The purpose of this invention is to provide an arthroscopic needle grasping forceps to solve the existing problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an arthroscopic needle grasping forceps, comprising a forceps body, a fixed forceps bar, and a movable forceps bar. A fixed forceps bar is fixedly mounted at one end of the forceps body, and an extension rod is provided at the other end of the forceps body. Fixed and movable forceps are respectively provided on both sides of the end of the extension rod. Both the movable and fixed forceps are semi-circular ring structures. A movable groove is formed on the inner side of the middle of the forceps body. A movable forceps bar is movably connected to the movable groove via a rotating shaft. A locking plate and a positioning plate are respectively provided on the same end of the opposite sides of the fixed and movable forceps bars. The locking plate and the positioning plate are staggered in height. Several locking grooves are formed at the bottom of the locking plate. A locking block is slidably provided at one end of the top of the positioning plate. A pressure block is provided at the top of the other end of the positioning plate. The bottom end of the pressure block extends into the interior of the positioning plate and is fixedly connected to the locking block via a connecting rod. A return spring is provided at the bottom of the pressure block.

[0006] Preferably, the end of the extension rod at one end of the clamp body is provided with a groove, and the two sides inside the groove are movably connected to the movable clamp via a movable shaft, and the fixed clamp is fixedly installed on the outer side of the groove.

[0007] Preferably, the extension rod at one end of the clamp body has a through groove inside, and an extension plate is slidably disposed inside the through groove. One end of the extension plate extends into the interior of the movable groove, and the other end of the extension plate extends into the interior of the recess.

[0008] Preferably, a movable seat is provided at one end of the extension plate that extends into the groove, one side of the movable seat is fixedly connected to the outer side of the movable clamp, and the movable seat is movably connected to the extension plate.

[0009] Preferably, the extension plate has a movable plate at one end extending into the movable groove, and both ends of the movable plate are provided with pins.

[0010] Preferably, the movable clamp rod has a protrusion at one end extending into the movable groove, and a connecting plate is provided at the end of the protrusion. The two ends of the movable plate are movably connected to the connecting plate and the extension plate respectively by a pin.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. By setting a snap-fit ​​plate and a positioning plate between the fixed clamp rod and the movable clamp rod, the snap-fit ​​groove on the snap-fit ​​plate, in conjunction with the snap-fit ​​block on the positioning plate, forms a snap-fit ​​state, thereby achieving snap-fit ​​positioning of the fixed clamp rod and the movable clamp rod, ensuring their relative stability, so that the connecting plate and the movable plate cannot move. The movable plate then holds the extension plate, thereby achieving the positioning of the movable clamp, which can maintain the clamping or releasing state. This allows the surgeon to operate without having to apply continuous force, achieving a certain degree of labor saving, and facilitating better operation for the surgeon.

[0013] 2. By designing the movable and fixed clamps as a semi-circular ring structure, they not only have a biting function, but also utilize the cylindrical cavity formed by the two to improve the fit with the Kirschner wire and guide wire surfaces, thereby facilitating better gripping of the Kirschner wire and guide wire and improving operational stability. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of the positioning plate of this utility model;

[0017] Figure 4 For the present utility model Figure 2 Schematic diagram of the enlarged structure of A in the middle;

[0018] Figure 5 For the present utility model Figure 2 Schematic diagram of the enlarged structure of B.

[0019] In the diagram: 1. Clamp body; 2. Fixed clamp bar; 3. Movable clamp bar; 4. Movable groove; 5. Rotating shaft; 6. Protrusion; 7. Connecting plate; 8. Pin; 9. Movable plate; 10. Extension plate; 11. Through groove; 12. Movable seat; 13. Movable clamp; 14. Movable shaft; 15. Fixed clamp; 16. Groove; 17. Snap-fit ​​plate; 18. Snap-fit ​​groove; 19. Positioning plate; 20. Snap-fit ​​block; 21. Connecting rod; 22. Pressure block; 23. Return spring. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-5This utility model provides a technical solution for arthroscopic needle grasping forceps: it includes a forceps body 1, a fixed forceps bar 2, and a movable forceps bar 3. The fixed forceps bar 2 is fixedly mounted on one end of the forceps body 1, and an extension rod is provided on the other end of the forceps body 1. Fixed forceps 15 and movable forceps 13 are respectively provided on both sides of the end of the extension rod. Both the movable forceps 13 and the fixed forceps 15 are semi-circular ring structures. A movable groove 4 is opened on the inner side of the middle of the forceps body 1. The movable forceps bar 3 is movably connected to the movable groove 4 via a rotating shaft 5. The fixed forceps bar 2 and the movable forceps bar 3... A snap-fit ​​plate 17 and a positioning plate 19 are respectively provided on the same end of opposite sides of the moving clamp rod 3. The snap-fit ​​plate 17 and the positioning plate 19 are staggered in height. Several snap-fit ​​grooves 18 are opened at the bottom of the snap-fit ​​plate 17. A snap-fit ​​block 20 is slidably provided at one end of the top of the positioning plate 19. A pressure block 22 is provided at the top of the other end of the positioning plate 19. The bottom end of the pressure block 22 extends into the interior of the positioning plate 19 and is fixedly connected to the snap-fit ​​block 20 through a connecting rod 21. A return spring 23 is provided at the bottom of the pressure block 22.

[0022] Specifically, a groove 16 is provided at the end of the extension rod of the clamp body 1. The two sides inside the groove 16 are movably connected to the movable clamp 13 through the movable shaft 14. The fixed clamp 15 is fixedly installed on the outer side of the groove 16.

[0023] Specifically, a through groove 11 is provided inside the extension rod at one end of the clamp body 1. An extension plate 10 is slidably arranged inside the through groove 11. One end of the extension plate 10 extends into the interior of the movable groove 4, and the other end of the extension plate 10 extends into the interior of the groove 16.

[0024] Specifically, a movable seat 12 is provided at one end of the extension plate 10 that extends into the groove 16. One side of the movable seat 12 is fixedly connected to the outer side of the movable clamp 13, and the movable seat 12 is movably connected to the extension plate 10.

[0025] Specifically, an active plate 9 is provided at one end of the extension plate 10 that extends into the active groove 4, and pins 8 are provided at both ends of the active plate 9.

[0026] Specifically, the movable clamp 3 extends into the movable groove 4 and has a protrusion 6 at one end. The protrusion 6 has a connecting plate 7 at its end. The two ends of the movable plate 9 are movably connected to the connecting plate 7 and the extension plate 10 respectively by a pin 8.

[0027] In this embodiment, during use, a Kirschner wire or guide wire is first inserted percutaneously. The Kirschner wire or guide wire penetrates the fracture fragment but does not completely exit it. Then, the end of the forceps body 1 with the extension rod is inserted through another small incision. By operating the fixed forceps rod 2 and the movable forceps rod 3 to grip or release, the connecting plate 7 drives the movable plate 9 to move. The movable plate 9 pulls the extension plate 10 to slide inside the through groove 11, so that it works with the movable seat 12 to drive the movable forceps 13. This controls the engagement and disengagement of the semi-circular movable forceps 13 and the fixed forceps 15 at the front end of the extension rod. When engaged, the circular cavity formed by the movable forceps 13 and the fixed forceps 15, combined with their clamping action, completely grasps the Kirschner wire or guide wire, making them fit more closely to the Kirschner wire or guide wire. The Kirschner wire or guide wire passes through the cylindrical structure at the front end of the grasping forceps. At this time, by pulling the fixed forceps rod 2 and the movable forceps rod... 3. Drive the Kirschner wire or guide wire to reduce the fracture fragment to the tip of the lateral malleolus. After reduction, use the locking plate 17 and positioning plate 19 on the fixed clamp rod 2 and the movable clamp rod 3 to make the locking block 20 on the positioning plate 19 lock into the corresponding locking groove 18 at the bottom of the locking plate 17, thereby maintaining the clamping of the fixed clamp 15 and the movable clamp 13 and stabilizing the position of the clamp body 1. Then, completely pass the Kirschner wire or guide wire through the fracture fragment, and then insert the Kirschner wire or guide wire into the tip of the lateral malleolus. Finally, by pressing the pressure block 22, drive the connecting rod 21 to move down, so that it drives the locking block 20 to retract into the positioning plate 19, thereby making the locking block 20 disengage from the locking groove 18. Then, reverse the direction to open the fixed clamp rod 2 and the movable clamp rod 3, so that the fixed clamp 15 and the movable clamp 13 are separated from the Kirschner wire or guide wire. After separation, the grasping clamp can be withdrawn from the body. If screw fixation is required, a hollow screw can be screwed in through the guide wire to fix the fracture fragment.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An arthroscopic grasping forceps, comprising a forceps body (1), a fixed forceps lever (2) and a movable forceps lever (3), characterized in that: One end of the clamp body (1) is fixedly provided with a fixed clamp rod (2), the other end of the clamp body (1) is provided with an extension rod, the distal end of the extension rod is provided with a fixed clamp (15) and a movable clamp (13) respectively, the movable clamp (13) and the fixed clamp (15) are both semicircular ring structures, the inner side of the middle part of the clamp body (1) is provided with a movable slot (4), the movable slot (4) is movably connected with a movable clamp rod (3) through a rotating shaft (5), the opposite side of the fixed clamp rod (2) and the movable clamp rod (3) is provided with a clamping plate (17) and a positioning plate (19) respectively, the clamping plate (17) and the positioning plate (19) are staggered in height, a plurality of clamping grooves (18) are formed in the bottom of the clamping plate (17), a clamping block (20) is slidably arranged at one end of the top of the positioning plate (19), a pressing block (22) is arranged at the other end of the top of the positioning plate (19), the bottom end of the pressing block (22) extends to the inside of the positioning plate (19) and is fixedly connected with the clamping block (20) through a connecting rod (21), and a return spring (23) is arranged at the bottom of the pressing block (22).

2. The grasper according to claim 1, wherein: The distal end of the extension rod of one end of the clamp body (1) is provided with a groove (16), the inside of the groove (16) is movably connected with the movable clamp (13) through the movable shaft (14), and the fixed clamp (15) is fixedly arranged on the outer end side of the groove (16).

3. The grasper according to claim 1, wherein: The inside of the extension rod of one end of the clamp body (1) is provided with a through groove (11), the inside of the through groove (11) is slidably provided with an extension plate (10), one end of the extension plate (10) extends to the inside of the movable slot (4), and the other end of the extension plate (10) extends to the inside of the groove (16).

4. The grasper according to claim 3, wherein: One end of the extension plate (10) extending to the inside of the groove (16) is provided with a movable seat (12), one side of the movable seat (12) is fixedly connected with the outside of the movable clamp (13), and the movable seat (12) is movably connected with the extension plate (10).

5. The grasper according to claim 3, wherein: One end of the extension plate (10) extending to the inside of the movable slot (4) is provided with a movable plate (9), and the movable plate (9) is provided with a pin shaft (8) at both ends.

6. The grasper according to claim 5, wherein: The distal end of one end of the movable clamp rod (3) extending to the inside of the movable slot (4) is provided with a protrusion (6), the distal end of the protrusion (6) is provided with a connecting plate (7), and the movable plate (9) is movably connected with the connecting plate (7) and the extension plate (10) through the pin shaft (8) arranged at both ends.

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