Positioning device for tibia osteotomy
By designing a tibial osteotomy positioning device that includes an ankle holder and a leg holder, the problem of unstable fixation of the ankle holder was solved, the stability of the device was enhanced, the accuracy of the osteotomy angle and thickness was ensured, and the surgical outcome was improved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG UNIV
- Filing Date
- 2025-04-08
- Publication Date
- 2026-05-01
AI Technical Summary
The ankle-holding device in existing extramedullary osteotomy devices is unstable, which affects the accuracy of confirming the osteotomy angle and thickness, resulting in poor surgical outcomes.
Design a tibial osteotomy positioning device including a force line adjustment telescopic component, an osteotomy guide component, and a fixation component. The fixation component consists of an ankle clamp and a leg clamp. The ankle clamp holds the ankle joint, and the leg clamp holds the lower leg to enhance the stability of the device.
The dual clamping of the ankle and leg clamps improves the stability of the device during surgery, ensures the accuracy of the osteotomy angle and thickness, and enhances the surgical outcome.
Smart Images
Figure CN224179765U_ABST
Abstract
Description
A positioning device for tibial osteotomy Technical Field
[0001] This utility model belongs to the field of medical device technology, specifically relating to a positioning device for tibial osteotomy. Background Technology
[0002] The knee joint is a vital weight-bearing joint in the lower limbs, and its structure and function are among the most complex of all human joints. Total knee replacement surgery is an effective treatment for knee-related diseases, particularly in elderly patients with conditions such as bone wear and osteoarthritis. By replacing and reconstructing the damaged joint with an artificial knee joint, it can alleviate symptoms, eliminate pain, correct knee deformities, restore knee function, improve the patient's knee condition, and enhance their quality of life. It can significantly relieve or eliminate symptoms of osteonecrosis, irreducible comminuted fractures and dislocations, osteoarthritis with pain and limited mobility, and rheumatoid arthritis with stiffness or difficulty in movement. Joint range of motion is improved to some extent, and the appearance of deformed limbs is significantly improved. Currently, due to its short treatment duration and significant pain relief effects, total knee replacement technology is increasingly accepted by both doctors and patients. Knee replacement surgery mainly involves osteotomy of the diseased femur and tibia to obtain the tibial plateau for implanting the prosthesis. Then, a suitable prosthesis is installed to reconstruct the patient's knee joint. Before osteotomy, it is necessary to determine the osteotomy angle and osteotomy thickness of the tibial plateau. The osteotomy angle mainly refers to the anteroposterior and varus angles, and the osteotomy thickness refers to the amount of bone removed. Whether the osteotomy angle and osteotomy thickness are appropriate during the operation directly affects the postoperative outcome and postoperative recovery of the patient. The osteotomy angle and osteotomy thickness of the femur and tibia play a crucial role in total knee replacement surgery.
[0003] In knee replacement surgery, intramedullary and extramedullary osteotomy devices are commonly used to confirm the osteotomy angle and thickness. Extramedullary osteotomy devices achieve osteotomy positioning without damaging the normal structure of the tibial medullary cavity, resulting in less trauma and bleeding for the patient. Furthermore, their ease of operation has led to their widespread clinical application. Extramedullary osteotomy devices include an ankle clasp, a force line adjustment rod, and an osteotomy guide. The ankle clasp is located at the bottom of the force line adjustment rod and is fixed in place at the patient's ankle joint for stabilization. However, during use, the ankle clasp may become unstable, affecting the device's usability, reducing the accuracy of osteotomy angle and thickness determination, and ultimately impacting surgical outcomes. Summary of the Invention
[0004] The purpose of this invention is to provide a positioning device for tibial osteotomy, which aims to solve the problem of unstable fixation of ankle clamps.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a positioning device for tibial osteotomy is provided, comprising a force line adjustment telescopic component, an osteotomy guide component, and a fixing component. The osteotomy guide component is disposed at the upper end of the force line adjustment telescopic component. The fixing component includes an ankle holder and a leg holder. The ankle holder is disposed at the lower end of the force line adjustment telescopic component and is used to be placed at the patient's ankle joint. The leg holder is disposed on the force line adjustment telescopic component and directly above the ankle holder, and is used to be placed at the patient's lower leg.
[0006] In one possible implementation, the leg holder has the same structure as the ankle holder. The ankle holder includes a clamping member, a sliding crossbar, and a first locking button. The clamping member is used to clamp the patient's ankle. The sliding crossbar is located on the rear side of the clamping member and is horizontally positioned. The force line adjusting telescopic assembly is provided with a first locking hole suitable for the sliding crossbar to pass through. The first locking button passes through the side wall of the first locking hole and confines the sliding crossbar within the first locking hole.
[0007] In one possible implementation, the ankle gripper further includes a locking crossbar, a locking slider, a locking seat, and a second locking button. The locking crossbar passes through the sliding crossbar, the second locking button is located at the rear end of the locking crossbar, the locking slider is located at the front end of the locking crossbar, the rear sidewall of the locking seat is provided with a horizontally arranged groove, the locking slider is slidably disposed in the groove, the front end of the locking crossbar passes through the locking slider, the locking crossbar limits the locking slider within the groove, and the clamping member is disposed on the front sidewall of the locking seat.
[0008] In one possible implementation, the clamping member includes a first clamping arm group and a second clamping arm group disposed opposite to each other. The first clamping arm group includes a first fixed arm, a first movable arm and a first limiting torsion spring. The first fixed arm is disposed on the front side wall of the locking seat. The first movable arm is hinged to the front end of the first fixed arm. The first limiting torsion spring connects the first fixed arm and the first movable arm, pulling the first movable arm toward the first fixed arm.
[0009] In one possible implementation, the force line adjusting telescopic assembly includes an upper connecting cylinder, an upper connecting rod, a connecting part, and a lower connecting rod. The lower end of the upper connecting rod passes through the upper opening of the upper connecting cylinder. The connecting part connects the lower end of the upper connecting cylinder to the upper end of the lower connecting rod. The leg holder and the ankle holder are both mounted on the lower connecting rod.
[0010] In one possible implementation, a third locking button is provided on the side wall of the upper connecting cylinder, which limits the upper connecting rod within the upper connecting cylinder.
[0011] In one possible implementation, the side wall of the upper connecting rod is provided with a first limiting surface, and the inner side wall of the upper connecting cylinder is provided with a second limiting surface that matches the first limiting surface.
[0012] In one possible implementation, the lower end of the osteotomy guide assembly is provided with an angle adjustment component, the angle adjustment component including an angle adjustment plate and a fourth locking button, the upper end of the force line adjustment telescopic assembly is provided with a rotation groove, the angle adjustment plate is disposed in the rotation groove and has the degree of freedom to rotate in the rotation groove, and the fourth locking button limits the angle adjustment plate to the rotation groove.
[0013] In one possible implementation, the lower end face of the osteotomy guide assembly is provided with a height locking member, and the upper end of the angle adjustment plate is provided with a height rod, the height rod passing through the height locking member and the osteotomy guide assembly, the height locking member limiting the osteotomy guide assembly on the height rod.
[0014] In one possible implementation, the height locking component includes a height positioning seat and a locking wrench. The rear side of the height positioning seat is provided with a wrench groove. The locking wrench is L-shaped, and the short side block of the locking wrench is hinged in the wrench groove. The locking wrench limits the height positioning seat to the height rod.
[0015] The advantages of the positioning device for tibial osteotomy provided by this utility model are as follows:
[0016] Compared with existing technologies, this device incorporates a force-line adjustable telescopic component, an osteotomy guide component, and a fixation component. Both the osteotomy guide and fixation components are mounted on the force-line adjustable telescopic component. The osteotomy guide component is located at the upper end of the force-line adjustable telescopic component and is used for osteotomy operations. The fixation component includes an ankle holder and a leg holder. The ankle holder is used to hold the patient's ankle joint, and the leg holder is used to hold the patient's lower leg. The ankle holder is located at the lower end of the force-line adjustable telescopic component, and the leg holder is located in the lower half of the force-line adjustable telescopic component. Along the length of the force-line adjustable telescopic component, the leg holder is positioned directly above the ankle holder. The simultaneous holding of the ankle holder and leg holder on the patient's leg helps enhance the stability of the device during surgical procedures. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 is a three-dimensional structural schematic diagram of the tibial osteotomy positioning device provided in an embodiment of the present invention;
[0019] Figure 2 is a three-dimensional structural diagram of the locking crossbar used in the embodiment of this utility model;
[0020] Figure 3 is a three-dimensional structural diagram of the height locking component used in the embodiment of this utility model;
[0021] Figure 4 is an exploded structural diagram of the height locking component used in the embodiment of this utility model.
[0022] In the diagram: 1. Osteotomy guide assembly; 2. Upper connecting rod; 3. Upper connecting cylinder; 4. Connecting part; 5. Lower connecting rod; 6. Ankle holder; 7. Leg holder; 8. Sliding crossbar; 9. First locking button; 10. Locking crossbar; 11. Locking slider; 12. Locking seat; 13. Second locking button; 14. First fixed arm; 15. First movable arm; 16. First limiting torsion spring; 17. First hinge shaft; 18. Third locking button; 19. Internal threaded cylinder; 20. First limiting surface; 21. Angle adjustment plate; 22. Fourth locking button; 23. Height rod; 24. Height positioning seat; 25. Locking wrench; 26. Third limiting surface; 27. Limiting post. Detailed Implementation
[0023] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0024] Referring to Figures 1 to 4, a specific embodiment of a positioning device for tibial osteotomy provided by this utility model will now be described. It includes a force line adjustment telescopic component, an osteotomy guide component 1, and a fixing component. The osteotomy guide component 1 is disposed at the upper end of the force line adjustment telescopic component. The fixing component includes an ankle holder 6 and a leg holder 7. The ankle holder 6 is disposed at the lower end of the force line adjustment telescopic component and is used to be placed at the patient's ankle joint. The leg holder 7 is disposed on the force line adjustment telescopic component and is disposed directly above the ankle holder 6. The leg holder 7 is used to be placed at the patient's lower leg.
[0025] This utility model provides a positioning device for tibial osteotomy. Compared with the prior art, it includes a force line adjustment telescopic component, an osteotomy guide component 1, and a fixing component. Both the osteotomy guide component 1 and the fixing component are mounted on the force line adjustment telescopic component. The osteotomy guide component 1 is located at the upper end of the force line adjustment telescopic component and is used for osteotomy operations. The fixing component includes an ankle holder 6 and a leg holder 7. The ankle holder 6 is used to hold the patient's ankle joint, and the leg holder 7 is used to hold the patient's lower leg. The ankle holder 6 is located at the lower end of the force line adjustment telescopic component, and the leg holder 7 is located in the lower half of the force line adjustment telescopic component. Along the length direction of the force line adjustment telescopic component, the leg holder 7 is positioned directly above the ankle holder 6. The ankle holder 6 and the leg holder 7 simultaneously hold the patient's leg, which helps to enhance the stability of the device during surgical operations.
[0026] Specifically, please refer to Figures 1 to 4. The device includes a force line adjustment telescopic assembly, an osteotomy guide assembly 1, and a fixation assembly. The fixation assembly includes an ankle clamp 6 and a leg clamp 7. The osteotomy guide assembly 1, the leg clamp 7, and the ankle clamp 6 are distributed from top to bottom on the force line adjustment telescopic assembly. The ankle clamp 6 is used to clamp the patient's ankle joint, and the leg clamp 7 is used to clamp the patient's lower leg. The clamping part of the ankle clamp 6 is defined to be located on the front side of the force line adjustment telescopic assembly. The ankle clamp 6 and the ankle clamp 7 are clamped on the patient's leg at the same time, which effectively enhances the stability of the device clamping.
[0027] As a specific embodiment of the positioning device for tibial osteotomy provided by this utility model, please refer to Figures 1 to 4. The force line adjustment telescopic component includes an upper connecting cylinder 3, an upper connecting rod 2, a connecting part 4, and a lower connecting rod 5. The lower end of the upper connecting rod 2 passes through the upper opening of the upper connecting cylinder 3. The connecting part 4 connects the lower end of the upper connecting cylinder 3 and the upper end of the lower connecting rod 5. The leg holder 7 and the ankle holder 6 are both arranged on the lower connecting rod 5.
[0028] Specifically, please refer to Figures 1 to 4. The force line adjustment telescopic assembly includes an upper connecting cylinder 3, an upper connecting rod 2, a connecting part 4, and a lower connecting rod 5. The upper connecting cylinder 3 has an upward opening. The upper connecting rod 2 passes through the upper connecting cylinder 3, and the upper end of the upper connecting rod 2 is located above the upper connecting cylinder 3. The upper connecting rod 2 has the freedom to slide up and down within the upper connecting cylinder 3. The osteotomy guide assembly 1 is located at the upper end of the upper connecting rod 2. The connecting part 4 is located at the lower end of the upper connecting cylinder 3. The connecting part 4 is perpendicular to the upper connecting cylinder 3 and is located on the rear side of the upper connecting cylinder 3. The rear end of the connecting part 4 is located at the upper end of the lower connecting rod 5. The lower connecting rod 5 is perpendicular to the connecting part 4. The leg holder 7 and the ankle holder 6 are sequentially arranged on the lower connecting rod 5.
[0029] As a specific embodiment of the positioning device for tibial osteotomy provided by this utility model, please refer to Figures 1 and 2. The leg holder 7 and the ankle holder 6 have the same structure. The ankle holder 6 includes a clamping member, a sliding crossbar 8 and a first locking button 9. The clamping member is used to clamp the patient's ankle. The sliding crossbar 8 is located on the rear side of the clamping member and is horizontally arranged. The force line adjustment telescopic component is provided with a first locking hole suitable for the sliding crossbar 8 to pass through. The first locking button 9 passes through the side wall of the first locking hole and limits the sliding crossbar 8 within the first locking hole.
[0030] Specifically, please refer to Figures 1 and 2. The leg holder 7 and the ankle holder 6 have the same structure. The ankle holder 6 is located directly below the leg holder 7 and is aligned with the same straight line. The ankle holder 6 includes a clamping component, a sliding crossbar 8, and a first locking button 9. The first locking hole is located on the lower connecting rod 5 and extends through the lower connecting rod 5 in the front-back direction. The sliding crossbar 8 passes through the first locking hole. The clamping component is located at the front end of the sliding crossbar 8. The sliding crossbar 8 has a degree of freedom of movement within the first locking hole. The first locking button 9 passes through the side wall of the first locking hole and abuts against the side wall of the sliding crossbar 8. The first locking button 9 is threadedly connected to the lower connecting rod 5 and can lock the position of the sliding crossbar 8.
[0031] As a specific embodiment of the positioning device for tibial osteotomy provided by this utility model, please refer to Figures 1 and 2. The ankle holder 6 also includes a locking crossbar 10, a locking slider 11, a locking seat 12, and a second locking button 13. The locking crossbar 10 passes through the sliding crossbar 8. The second locking button 13 is located at the rear end of the locking crossbar 10. The locking slider 11 is located at the front end of the locking crossbar 10. The rear side wall of the locking seat 12 is provided with a horizontally arranged groove. The locking slider 11 is slidably disposed in the groove. The front end of the locking crossbar 10 passes through the locking slider 11. The locking crossbar 10 limits the locking slider 11 in the groove. The clamping member is disposed on the front side wall of the locking seat 12.
[0032] Specifically, referring to Figures 1 and 2, the ankle support 6 also includes a locking crossbar 10, a locking slider 11, a locking seat 12, and a second locking button 13. The locking crossbar 10 passes through the sliding crossbar 8 along its length, with the rear end of the locking crossbar 10 extending out of the sliding crossbar 8. The second locking button 13 is located at the rear end of the locking crossbar 10. The locking slider 11 is located at the front end of the locking crossbar 10 and is slidably positioned in a groove on the rear side wall of the locking seat 12. The groove is horizontally positioned. According to actual usage requirements, the locking seat 12 can slide left and right relative to the force line adjustment telescopic component. The front end of the locking crossbar 10 passes through the locking slider 11. The bottom of the groove is provided with a locking groove suitable for the front end of the locking crossbar 10 to slide. The front end of the locking crossbar 10 abuts against the bottom of the locking groove, thereby locking the position of the locking slider 11 within the groove.
[0033] As a specific embodiment of the positioning device for tibial osteotomy provided by this utility model, please refer to Figures 1 and 2. The clamping member includes a first clamping arm group and a second clamping arm group arranged opposite to each other. The first clamping arm group includes a first fixed arm 14, a first movable arm 15 and a first limiting torsion spring 16. The first fixed arm 14 is disposed on the front side wall of the locking seat 12. The first movable arm 15 is hinged to the front end of the first fixed arm 14. The first limiting torsion spring 16 connects the first fixed arm 14 and the first movable arm 15, and pulls the first movable arm 15 toward the first fixed arm 14.
[0034] Specifically, referring to Figures 1 and 2, the clamping device includes a first clamping arm group and a second clamping arm group arranged opposite to each other. The first clamping arm group includes a first fixed arm 14, a first movable arm 15, and a first limiting torsion spring 16. The rear end of the first fixed arm 14 is disposed on the front side wall of the locking seat 12. The first fixed arm 14 is disposed at the right end of the locking seat 12 and tilted towards the right side of the locking seat 12. The rear end of the first movable arm 15 is hinged to the front end of the first fixed arm 14. The first limiting torsion spring 16 connects the front end of the first fixed arm 14 and the rear end of the first movable arm 15. In the unloaded state, the first limiting torsion spring 16 pulls the first movable arm 15 toward the first fixed arm 14. The second clamping arm group is arranged opposite to the first clamping arm group. The first movable arm 15 of the first clamping arm group and the second movable arm of the second clamping arm group together limit the patient's leg within the space enclosed by the first clamping arm group and the second clamping arm group.
[0035] Further, referring to Figures 1 and 2, the first movable arm 15 and the first fixed arm 14 are hinged together by a first hinge shaft 17, which passes through the first fixed arm 14. The lower end of the first hinge shaft 17 is fixed to the first movable arm 15. The first limiting torsion spring 16 is sleeved on the first hinge shaft 17 and located above the first fixed arm 14. The upper end of the first limiting torsion spring 16 is fixed to the upper end of the first hinge shaft 17, and the lower end of the first limiting torsion spring 16 is fixed to the first fixed arm 14.
[0036] As a specific embodiment of the positioning device for tibial osteotomy provided by this utility model, please refer to Figures 1, 3 and 4. The side wall of the upper connecting cylinder 3 is provided with a third locking button 18, which limits the upper connecting rod 2 inside the upper connecting cylinder 3.
[0037] Specifically, please refer to Figures 1, 3, and 4. The third locking button 18 is located on the side wall of the upper connecting cylinder 3. An internally threaded cylinder 19 is provided on the side wall of the upper connecting cylinder 3. The inner wall of the internally threaded cylinder 19 is threaded. The internally threaded cylinder 19 is perpendicular to the upper connecting cylinder 3. The internal space of the internally threaded cylinder 19 is connected to the internal space of the upper connecting cylinder 3. The third locking button 18 is threadedly matched with the internally threaded cylinder 19. The third locking button 18 is inserted into the internally threaded cylinder 19 and abuts against the side wall of the upper connecting rod 2, thus limiting the upper connecting rod 2 within the upper connecting cylinder 3.
[0038] As a specific embodiment of the positioning device for tibial osteotomy provided by this utility model, please refer to Figures 1, 3 and 4. The side wall of the upper connecting rod 2 is provided with a first limiting surface 20, and the inner side wall of the upper connecting cylinder 3 is provided with a second limiting surface that matches the first limiting surface 20.
[0039] Specifically, please refer to Figures 1, 3 and 4. The first limiting surface 20 is set on the outer side wall of the upper connecting rod 2 along the length direction of the upper connecting rod 2. The second limiting surface is set on the inner side wall of the upper connecting cylinder 3 along the length direction of the upper connecting cylinder 3. The first limiting surface 20 and the second limiting surface match each other to prevent the upper connecting rod 2 from rotating relative to the upper connecting cylinder 3.
[0040] As a specific embodiment of the positioning device for tibial osteotomy provided by this utility model, please refer to Figures 1, 3 and 4. The lower end of the osteotomy guide assembly 1 is provided with an angle adjustment component, which includes an angle adjustment plate 21 and a fourth locking button 22. The upper end of the force line adjustment telescopic assembly is provided with a rotating groove. The angle adjustment plate 21 is disposed in the rotating groove and has the freedom to rotate in the rotating groove. The fourth locking button 22 limits the angle adjustment plate 21 in the rotating groove.
[0041] Specifically, please refer to Figures 1, 3, and 4. The angle adjustment component is used to adjust the angle of the osteotomy guide assembly 1. The angle adjustment component includes an angle adjustment plate 21 and a fourth locking button 22. The angle adjustment plate 21 is located at the lower end of the osteotomy guide assembly 1 and is vertically arranged. The upper end of the force line adjustment telescopic assembly is provided with a rotating groove. The angle adjustment plate 21 is vertically inserted into the rotating groove and has the freedom to rotate within the rotating groove. The fourth locking button 22 is provided through the angle adjustment plate 21 and the side wall of the rotating groove. The fourth locking button 22 is threadedly connected to the side wall of the rotating groove. When the angle adjustment plate 21 is adjusted to the specified position, the fourth locking button 22 is rotated, and the fourth locking button 22 limits the angle adjustment plate 21 within the rotating groove.
[0042] As a specific embodiment of the positioning device for tibial osteotomy provided by this utility model, please refer to Figures 1, 3 and 4. The lower end face of the osteotomy guide assembly 1 is provided with a height locking member, and the upper end of the angle adjustment plate 21 is provided with a height rod 23. The height rod 23 passes through the height locking member and the osteotomy guide assembly 1, and the height locking member limits the osteotomy guide assembly 1 to the height rod 23.
[0043] Specifically, please refer to Figures 1, 3, and 4. The height rod 23 is located at the upper end of the angle adjustment plate 21, and the height locking member is located at the lower end face of the osteotomy guide assembly 1. The height rod 23 passes through the height locking member and the osteotomy guide assembly 1. When the height locking member is unlocked, the osteotomy guide assembly 1 can slide on the height rod 23 to adjust the position of the osteotomy guide assembly 1. When the height locking member is locked, the osteotomy guide assembly 1 is limited to the height rod 23.
[0044] As a specific embodiment of the positioning device for tibial osteotomy provided by this utility model, please refer to Figures 1, 3 and 4. The height locking component includes a height positioning seat 24 and a locking wrench 25. A wrench groove is provided on the rear side of the height positioning seat 24. The locking wrench 25 is L-shaped, and the short side block of the locking wrench 25 is hinged in the wrench groove. The locking wrench 25 limits the height positioning seat 24 to the height rod 23.
[0045] Specifically, referring to Figures 1, 3, and 4, the rear wall of the height rod 23 is provided with a third limiting surface 26, and the rear wall of the osteotomy guide assembly 1 is provided with a limiting post 27. The limiting post 27 penetrates the rear wall of the osteotomy guide assembly 1 and abuts against the third limiting surface 26 of the height rod 23 to prevent relative rotation of the osteotomy guide assembly 1 relative to the height rod 23. The third limiting surface 26 is provided along the length direction of the height rod 23. The height locking component includes a height positioning seat 24 and a locking wrench 25. The locking wrench 25 is arranged laterally. The height positioning seat 24 is located on the lower end face of the osteotomy guide assembly 1, and the wrench groove is located on the rear wall of the height positioning seat 24. At the height positioning seat 24, the third limiting surface 26 of the height rod 23 is provided with a limiting surface 26. 6 is located in the wrench slot. The locking wrench 25 is L-shaped and includes a vertically arranged short side block and a long side block. The short side block is hinged in the wrench slot. The locking wrench 25 has the freedom of rotation in the horizontal plane. A wrench limiting rod is provided on the height positioning seat 24. The wrench limiting rod is located on the side wall of the short side block away from the long side block. When the end of the short side block away from the long side block abuts against the third limiting surface 26 of the height rod 23, the wrench limiting rod locks the position of the short side block to prevent the short side block from rotating and limits the height positioning seat 24 to the height rod 23. When the locking wrench 25 is turned, the end of the short side block away from the long side block disengages from the third limiting surface 26 of the height rod 23, releasing the lock on the height positioning seat 24.
[0046] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A positioning device for tibial osteotomy, characterized in that, The device includes a force-line adjusting telescopic component, an osteotomy guiding component, and a fixation component. The osteotomy guiding component is located at the upper end of the force-line adjusting telescopic component. The fixation component includes an ankle holder and a leg holder. The ankle holder is located at the lower end of the force-line adjusting telescopic component and is used to be placed at the patient's ankle joint. The leg holder is located on the force-line adjusting telescopic component and directly above the ankle holder, and is used to be placed at the patient's lower leg.
2. The positioning device for tibial osteotomy as described in claim 1, characterized in that, The leg holder has the same structure as the ankle holder. The ankle holder includes a clamping member, a sliding crossbar, and a first locking button. The clamping member is used to clamp the patient's ankle. The sliding crossbar is located on the rear side of the clamping member and is horizontally positioned. The force line adjustment telescopic assembly is provided with a first locking hole suitable for the sliding crossbar to pass through. The first locking button passes through the side wall of the first locking hole and confines the sliding crossbar within the first locking hole.
3. A positioning device for tibial osteotomy as described in claim 2, characterized in that, The ankle gripper also includes a locking crossbar, a locking slider, a locking seat, and a second locking button. The locking crossbar passes through the sliding crossbar, the second locking button is located at the rear end of the locking crossbar, the locking slider is located at the front end of the locking crossbar, the rear side wall of the locking seat is provided with a horizontally arranged groove, the locking slider is slidably disposed in the groove, the front end of the locking crossbar passes through the locking slider, and the locking crossbar limits the locking slider within the groove. The clamping member is disposed on the front side wall of the locking seat.
4. A positioning device for use in tibial osteotomy as defined in claim 3, characterized in that The clamping member includes a first clamping arm group and a second clamping arm group arranged opposite to each other. The first clamping arm group includes a first fixed arm, a first movable arm and a first limiting torsion spring. The first fixed arm is disposed on the front side wall of the locking seat. The first movable arm is hinged to the front end of the first fixed arm. The first limiting torsion spring connects the first fixed arm and the first movable arm, pulling the first movable arm toward the first fixed arm.
5. A positioning device for tibial osteotomy as described in claim 1, characterized in that, The force line adjustment telescopic assembly includes an upper connecting cylinder, an upper connecting rod, a connecting part, and a lower connecting rod. The lower end of the upper connecting rod passes through the upper opening of the upper connecting cylinder. The connecting part connects the lower end of the upper connecting cylinder and the upper end of the lower connecting rod. The leg holder and the ankle holder are both mounted on the lower connecting rod.
6. A positioning device for tibial osteotomy as described in claim 5, characterized in that, A third locking button is provided on the side wall of the upper connecting cylinder, which limits the upper connecting rod inside the upper connecting cylinder.
7. A positioning device for tibial osteotomy as described in claim 6, characterized in that, The upper connecting rod has a first limiting surface on its side wall, and the upper connecting cylinder has a second limiting surface that matches the first limiting surface on its inner side wall.
8. A positioning device for tibial osteotomy as described in claim 1, characterized in that, The lower end of the osteotomy guide assembly is provided with an angle adjustment component, which includes an angle adjustment plate and a fourth locking button. The upper end of the force line adjustment telescopic assembly is provided with a rotation groove. The angle adjustment plate is disposed in the rotation groove and has the freedom to rotate within the rotation groove. The fourth locking button limits the angle adjustment plate to the rotation groove.
9. A positioning device for tibial osteotomy as described in claim 8, characterized in that, The lower end face of the osteotomy guide assembly is provided with a height locking member, and the upper end of the angle adjustment plate is provided with a height rod. The height rod passes through the height locking member and the osteotomy guide assembly, and the height locking member limits the osteotomy guide assembly to the height rod.
10. A positioning device for tibial osteotomy as described in claim 9, characterized in that, The height locking component includes a height positioning seat and a locking wrench. The rear side of the height positioning seat is provided with a wrench groove. The locking wrench is L-shaped, and the short side block of the locking wrench is hinged in the wrench groove. The locking wrench limits the height positioning seat to the height rod.