Ligament pull cutting tool

Abstract

This utility model provides a ligament traction and cutting tool, relating to the medical field. It includes a hollow support cylinder and a rotating winch movably mounted on the hollow support cylinder. The bottom end of the hollow support cylinder has positioning teeth, and the top end forms two support grooves for mounting the rotating winch. The rotating winch includes a first rotating handle and a second rotating handle that rotate synchronously. The first and second rotating handles are connected by a winding rod, which has a hole for the ligament connecting wire to pass through. Compared with existing technologies, this ligament traction and cutting tool allows the rotating winch to be mounted on the hollow support cylinder. By rotating the handles and the winding rod, the artificial ligament is pulled out, and then a cutter extends into the hollow support cylinder to cut it. This achieves labor-saving ligament traction, controllable progress, and easy ligament cutting.

Description

Technical Field

[0001] This utility model relates to the medical field, and in particular to a ligament traction and cutting tool. Background Technology

[0002] Anterior cruciate ligament rupture of the knee joint is a common condition in sports medicine and a significant cause of lower limb motor function limitations. Treatment primarily involves surgical reconstruction. Reconstructive materials include autologous tendon transplants, allogeneic tendon transplants, and artificial ligaments. The surgical procedure generally involves drilling holes at the sites where the graft will be fixed, then pulling the graft through the holes in the bones at both ends of the joint—specifically, the bone tunnels in the femur and tibia. Due to the demands of the surgical fitting technique, significant tension is required to reach the intended position within the bone tunnel. An interface screw is then screwed into the bone tunnel, compressing the graft (such as an artificial ligament) against the sidewall of the bone tunnel, creating a secure mechanical fixation.

[0003] Currently, artificial ligament traction is performed by wrapping the traction thread at the end of the ligament around a cylindrical plastic rod with a diameter of about 3 centimeters, and then manually rotating the cylinder to pull the ligament forward. Because the doctor's hand has no fulcrum, it is difficult to control the force and exert force. The doctor's hand becomes fatigued, and the traction may be inadequate or excessive, causing inconvenience in the operation.

[0004] After the artificial ligament is pulled into place, an interface screw is screwed in for fixation. This requires hundreds of kilograms of torque to screw in the screw. Then, a tubular scalpel is placed over the ligament and rotated to pry it off the excess ligament outside the bone tunnel, which is extremely physically demanding. Because the scalpel needs to be cut close to the screw, the blade is often damaged, making the cutting a major challenge of the surgery. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a ligament traction and cutting tool that enables labor-saving artificial ligament traction, controllable progress, and easy ligament cutting, thus providing convenience for medical personnel.

[0006] The technical solution adopted in this utility model is as follows:

[0007] A ligament traction and cutting tool includes a support hollow cylinder and a rotating winch movably mounted on the support hollow cylinder. The bottom end of the support hollow cylinder is provided with positioning teeth, and the top end of the support hollow cylinder forms two support grooves for mounting the rotating winch. The rotating winch includes a first rotating handle and a second rotating handle that rotate synchronously. The first rotating handle and the second rotating handle are connected by a winding rod, and the winding rod is provided with a wire hole for the ligament connection wire to pass through.

[0008] Preferably, the wire hole includes a wire through hole and at least one wire clamping slit disposed around the wire through hole.

[0009] More preferably, the cross-sectional area of ​​the open end of the clamping seam is greater than the cross-sectional area of ​​the tail end of the connection seam.

[0010] Preferably, the winding rod has protrusions at both ends, the first rotating handle has a first mounting port that mates with the protrusion at one end of the winding rod, and the second rotating handle has a second mounting port that mates with the protrusion at the other end of the winding rod.

[0011] Preferably, the winding rod is divided into a first winding rod and a second winding rod. One end of the first winding rod is provided with a first protrusion, and a first mounting port that mates with the first protrusion is provided on a first rotating handle. The other end of the first winding rod forms an insertion end, which has a wire hole for the ligament connection wire to pass through. One end of the second winding rod is provided with a second protrusion, and a second mounting port that mates with the second protrusion is provided on a second rotating handle. The other end of the second winding rod forms a receiving end, which has an insertion hole for the insertion end of the first winding rod to be inserted into and a wire through hole corresponding to the wire hole. The side wall of the other end of the first winding rod is provided with at least one protruding ridge, and the side wall of the insertion hole is provided with a protruding ridge groove that mates with the protruding ridge.

[0012] Preferably, the hollow cylinder of the support has two support seats facing each other at its top, and the support seats have support grooves formed on them; the support grooves are U-shaped.

[0013] Preferably, the winding rod has two retaining ring grooves that respectively mate with the bracket grooves; the distance between the two retaining ring grooves is not greater than the distance between the two bracket grooves on the hollow cylinder of the bracket.

[0014] Preferably, both the first and second rotary handles are provided with connection holes for connecting to power tools.

[0015] Preferably, the ligament traction cutting tool further includes a cutter that can be inserted into the hollow cylinder of the support. The cutter includes a handle and a blade. The blade is divided into a cutting section, a fulcrum section and a connecting section connected in sequence. The cutting section is hollow, and the wall of the movable end of the cutting section forms a cutting edge. The bottom of the cutting section is provided with an exit hole for the ligament to pass through.

[0016] More preferably, the angle between the cutting segment and the connecting rod is greater than 90 degrees, the cutting segment is inclined, and the end of the cutting segment forms an inclined end face.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model provides a ligament traction and cutting tool, in which a rotating winch is placed on the hollow cylinder of the support, and a manual or electric tool drives the two handles to rotate in the same direction, rotating the winding rod and winding seat to pull out the artificial ligament, and finally the cutter extends into the hollow cylinder of the support to cut it; thereby realizing labor-saving traction of artificial ligament, controllable progress, and easy ligament cutting, providing convenience for medical staff. Attached Figure Description

[0018] Figure 1 A schematic diagram of a ligament traction and cutting tool provided by this utility model.

[0019] Figure 2 An exploded view of a ligament traction and cutting tool provided by this utility model.

[0020] Figure 3 An exploded view of the first embodiment of the rotating winch in the ligament traction and cutting tool provided by this utility model.

[0021] Figure 4 An exploded view of the second embodiment of the rotating winch in the ligament traction and cutting tool provided by this utility model.

[0022] Figure 5 A schematic diagram of a ligament traction cutting tool with a cutting blade inserted, provided by this utility model.

[0023] Figure 6 A schematic diagram of the cutting blade in a ligament traction cutting tool provided by this utility model.

[0024] Figure 7 This is a schematic diagram of a ligament cutting tool used in this utility model to cut ligaments. Detailed Implementation

[0025] The preferred embodiments of this utility model will be described in detail with reference to the accompanying drawings.

[0026] Figures 1 to 7 This is a preferred embodiment of the ligament traction and cutting tool provided by this utility model. For example... Figures 1 to 7 As shown, the device includes a hollow cylinder 10 of the support frame and a rotating winch 20 movably mounted on the hollow cylinder 10. One end of the hollow cylinder 10 is provided with a positioning tooth 11, and the other end of the hollow cylinder 10 forms two support grooves 12 for mounting the rotating winch. The rotating winch 20 includes a first rotating handle 21 and a second rotating handle 22 that rotate synchronously. The first rotating handle 21 and the second rotating handle 22 are connected by a winding rod 23, which is provided with a wire hole 231 for the ligament connection wire to pass through. In use, The hollow tube 10 of the stent is placed on the ligament. The positioning teeth 11 at the bottom of the hollow tube 10 abut against the bone at the ligament outlet. The top of the hollow tube 10 is tapped so that the positioning teeth 11 at the bottom of the hollow tube 10 are locked onto the bone surface. The suture rod 23 is placed in the stent groove 12 of the hollow tube 10. The traction suture at the end of the ligament is pulled out and clamped into the suture hole 231. At this time, a manual or electric tool drives the first rotating handle 21 and the second rotating handle 22 to rotate in the same direction, pulling out the artificial ligament. This achieves labor-saving traction of the artificial ligament, controllable progress, and easy ligament cutting, providing convenience for medical staff.

[0027] like Figure 2 As shown, the suture hole 231 includes a suture through hole 2311 and at least one suture clamping seam 2312 surrounding the suture through hole. After the traction suture at the end of the ligament is passed through the suture through hole 2311, the traction suture is directly clamped into a suture clamping seam 2312 to prevent the traction suture at the end of the ligament from falling off. The suture clamping seam 2312 is V-shaped on the side, and the cross-sectional area of ​​the open end of the suture clamping seam is larger than the cross-sectional area of ​​the tail end of the suture clamping seam, thereby clamping the traction suture tightly.

[0028] like Figure 3 As shown, the winding rod 23 is an integral piece, with a boss 232 at each end of the winding rod 23. The first rotating handle 21 is provided with a first mounting port 211 that mates with the boss at one end of the winding rod 23, and the second rotating handle 22 is provided with a second mounting port 221 that mates with the boss at the other end of the winding rod 23, thereby mounting the first rotating handle 21 and the second rotating handle 22 at both ends of the winding rod 23.

[0029] like Figure 4 As shown, the winding rod 23 is a two-section type, consisting of a first winding rod 2301 and a second winding rod 2302. One end of the first winding rod 2301 has a first protrusion 23011, and the first rotating handle 21 has a first mounting port 211 that mates with the first protrusion. The other end of the first winding rod 2301 forms an insertion end 23012, which has a wire hole 231 for the ligament connection suture to pass through. One end of the second winding rod 2302 has a second protrusion 23021, and the second rotating handle 22 has a second mounting port 221 that mates with the second protrusion 23021. The other end of the second winding rod 2302 forms a receiving end 23022. The receiving end is provided with a socket 23023 for the insertion end 23012 of the first winding rod to be inserted and a wire hole 231 corresponding to the wire hole on the insertion end. In this way, the insertion end 23012 of the first winding rod 2301 is inserted into the socket 23023 of the receiving end 23022 in the second winding rod 2302. The two wire holes 231 correspond to each other. The first winding rod 2301 and the second winding rod 2302 are connected as one unit. The first rotating handle 21 is installed at one end of the first winding rod 2301 and the second rotating handle 22 is installed at one end of the second winding rod 2302.

[0030] Both the first winding rod 2301 and the second winding rod 2302 are cylindrical. The side wall of the insertion end 23012 of the first winding rod is provided with at least one protruding ridge 23013, and the side wall of the insertion hole 23023 is provided with a protruding groove 23024 that cooperates with the protruding ridge, so that the first winding rod 2301 and the second winding rod 2302 rotate synchronously, and turning either rotating handle can drive the other rotating handle.

[0031] like Figure 2As shown, the top of the hollow cylinder 10 of the support frame has two support seats 13 facing each other. Support seats 13 have U-shaped support grooves 12, which facilitates the placement and rotation of the winch 20 within the support grooves 12. Both the first winding rod 23 and the second winding rod 24 have retaining ring grooves 201 that mate with the support grooves 12. During placement, the two retaining ring grooves 201 engage with the two support grooves 12, preventing the winch 20 from moving within the support grooves 12. The distance between the two retaining ring grooves 201 is no greater than the distance between the two support grooves 12 on the hollow cylinder 10 of the support frame.

[0032] The first rotating handle 21 and the second rotating handle 22 are circular, lace-shaped, or cross-shaped, facilitating rotation of the first rotating handle 21 and the second rotating handle 22. Both the first rotating handle 21 and the second rotating handle 22 are also provided with connection holes 202 for connecting to power tools. Power tools can be inserted into the connection holes 202 to automatically rotate the first rotating handle 21 and the second rotating handle 22, reducing the burden on medical staff.

[0033] like Figures 5 to 7 As shown, the ligament traction cutting tool also includes a cutter 30 that can be inserted into the hollow cylinder 10 of the support. The cutter 30 includes a handle 31 and a blade 32. The blade 32 is divided into a cutting section 321, a fulcrum section 322, and a connecting rod 323 connected in sequence. The cutting section 321 is hollow, and the wall of the movable end of the cutting section 321 forms a cutting blade 3211. The bottom of the cutting section 323 is provided with an outlet hole 3212 for the ligament to pass through. Since there is a significant angle between the inclined cutting section 321 and the connecting rod 323, the fulcrum section 322 abuts against the bone to form a fulcrum. The ligament is inserted into the hollow cutting section 321 and passes through the outlet hole 3212 at the bottom. Pressing down the handle 31 and prying the inclined cutting section 321 upwards, the cutting blade 3211 of the cutting section 321 cuts the ligament.

[0034] The angle between the cutting segment 321 and the connecting rod 323 is greater than 90 degrees. The cutting segment 321 is inclined, and its end forms an inclined end face, so that the cutting blade 3211 is located on the inner edge of the pipe wall. It is worth noting that compared with the old-style cutting blade, cutting is less strenuous, and the ligament outlet of the cutting spatula is at the top, while in this application the ligament outlet 3212 is at the bottom, with a smaller angle to the edge of the cutting blade, making cutting easier. At the same time, in the old-style cutting blade, the sharp edge of the circular cutting edge is on the outer edge, which becomes dull due to frequent collisions with screws during cutting and cannot be sharpened again by grinding. In this application, the sharp edge is set on the inner edge of the pipe wall of the inclined cutting segment 323, which is convenient for grinding and better maintains its sharpness.

[0035] The specific usage process of the entire ligament traction and cutting tool is as follows: (1) Place the hollow tube 10 of the support on the ligament, and place the positioning teeth 11 at the bottom of the hollow tube 10 against the bone at the ligament outlet; (2) Tap the top of the hollow tube 10 of the support, so that the positioning teeth 11 at the bottom of the hollow tube 10 of the support clamp onto the bone surface, thereby positioning the hollow tube 10 of the support; (3) Place the winding rod 23 on the hollow tube 10 of the support, and place the retaining groove 201 of the winding rod 23 into the groove 12 of the support, pull out the traction line at the end of the ligament and clamp it into the line hole 231; (4) Hand (5) After the artificial ligament is pulled out, remove the rotating winch 20. Insert the end of the artificial ligament into the hollow cutting section 321 and out through the bottom hole 3212. Insert the blade 32 of the cutter 30 into the hollow cylinder 10 of the support and press the handle 31 so that the cutting section 321 of the blade 32 cuts the artificial ligament outside the bone of the ligament outlet. (6) Finally, remove the hollow cylinder 10 of the support and the cutter 30.

[0036] In summary, the technical solution of this utility model can fully and effectively achieve the aforementioned objectives. Furthermore, the structure and functional principles of this utility model have been fully verified in the embodiments, achieving the expected effects and objectives. Without departing from the principles and essence of this utility model, various changes or modifications can be made to the embodiments. Therefore, this utility model includes all substitutions within the scope mentioned in the patent application claims, and any equivalent changes made within the scope of this patent application are within the scope of the patent application.

Claims

1. A ligament traction and cutting tool, characterized in that, The device includes a hollow support cylinder and a rotating winch movably mounted on the hollow support cylinder. The bottom end of the hollow support cylinder is provided with positioning teeth, and the top end of the hollow support cylinder forms two support grooves for mounting the rotating winch. The rotating winch includes a first rotating handle and a second rotating handle that rotate synchronously. The first rotating handle and the second rotating handle are connected by a winding rod, and the winding rod is provided with a wire hole for the ligament connection wire to pass through.

2. The ligament traction and cutting tool according to claim 1, characterized in that: The wire hole includes a wire through hole and at least one wire clamping seam surrounding the wire through hole.

3. The ligament traction and cutting tool according to claim 2, characterized in that: The cross-sectional area of ​​the open end of the clamping seam is greater than the cross-sectional area of ​​the tail end of the connecting seam.

4. The ligament traction and cutting tool according to claim 1, characterized in that: The winding rod has protrusions at both ends. The first rotating handle has a first mounting port that mates with the protrusion at one end of the winding rod, and the second rotating handle has a second mounting port that mates with the protrusion at the other end of the winding rod.

5. The ligament traction and cutting tool according to claim 1, characterized in that: The winding rod is divided into a first winding rod and a second winding rod. One end of the first winding rod is provided with a first protrusion, and a first mounting port that mates with the first protrusion is provided on a first rotating handle. The other end of the first winding rod forms an insertion end, which has a wire hole for the ligament connection wire to pass through. One end of the second winding rod is provided with a second protrusion, and a second mounting port that mates with the second protrusion is provided on a second rotating handle. The other end of the second winding rod forms a receiving end, which has a socket for the insertion end of the first winding rod to be inserted into and a wire hole corresponding to the wire hole of the insertion end. At least one protruding ridge is provided on the side wall of the other end of the first winding rod, and a protruding ridge groove that mates with the protruding ridge is provided on the side wall of the socket.

6. The ligament traction and cutting tool according to claim 1, characterized in that: The hollow cylinder of the support has two support seats facing each other at its top, and support slots are formed on the support seats; the support slots are U-shaped.

7. The ligament traction and cutting tool according to claim 1, characterized in that: The winding rod has two retaining ring grooves that respectively mate with the bracket grooves; the distance between the two retaining ring grooves is not greater than the distance between the two bracket grooves on the hollow cylinder of the bracket.

8. The ligament traction and cutting tool according to claim 1, characterized in that: Both the first and second rotary handles are provided with connection holes for connecting to power tools.

9. The ligament traction and cutting tool according to claim 1, characterized in that: The ligament traction cutting tool also includes a cutter that can be inserted into the hollow cylinder of the support. The cutter includes a handle and a blade. The blade is divided into a cutting section, a fulcrum section and a connecting section connected in sequence. The cutting section is hollow, and the wall of the movable end of the cutting section forms a cutting edge. The bottom of the cutting section is provided with an exit hole for the ligament to pass through.

10. The ligament traction and cutting tool according to claim 9, characterized in that: The angle between the cutting segment and the connecting rod is greater than 90 degrees, the cutting segment is inclined, and the end of the cutting segment forms an inclined end face.

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