Femoral fracture traction device
By designing a femoral fracture traction device containing multiple connecting mechanisms, the problem of difficult to reset dislocation of bones in the fixed structure in the prior art is solved, and precise reduction of bones and minimally invasive surgery is achieved, reducing the burden on patients and doctors.
Patent Information
- Application Number
- CN202420756604.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-12
- Publication Date
- 2025-01-14
- Estimated Expiration
- 2034-04-12
AI Technical Summary
The existing femoral fracture traction device is a fixed structure, and it is difficult to effectively reduce the dislocated bone, which may lead to postoperative lower limb deformity or shortening of length.
A device including a first pull rod, a threaded sleeve, a second pull rod, a universal joint, a clamping mechanism, an adjustment sleeve, an adjustment block, an active ratchet and a worm gear is designed, and the pull rod is changed by rotating the threaded sleeve and an adjustment seat. Combining length and angle to achieve bone reset.
Accurate reduction of dislocated bones is achieved, reducing the time for broken bone reduction, reducing patient pain and doctor workload, and no large-scale incision of tissue, achieving minimally invasive surgery.
Smart Images
Figure CN222341280U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of orthopedic surgical instruments, in particular to a femoral fracture traction device. Background Art
[0002] The femur, also known as the thigh bone, hip bone, and tibia, is the longest tubular bone in the human body. The upper end of the femoral head and acetabulum form the hip joint, and the lower end forms the knee joint with the patella and upper end of the tibia, supporting the body weight.
[0003] At present, when performing femoral fracture surgery, it is necessary to traction the fracture site of the patient. The existing femoral fracture traction device is usually a fixed structure. The method of use is usually to fix the traction device at an appropriate position on the patient's bone, and then pull the bone in a certain direction to restore the length of the lower limb. However, when the femoral fracture is dislocated, this method cannot be used to reposition and fix it well, and lower limb deformity or length shortening is likely to occur after the operation. Therefore, the present invention proposes a femoral fracture traction device to solve this problem. Utility Model Content
[0004] The utility model aims to provide a femoral fracture traction device to solve the problem that the existing femoral fracture traction device is usually a fixed structure and is not convenient for resetting the dislocated bones.
[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0006] The basic technical scheme provided by the utility model is: a femoral fracture traction device, comprising a first traction rod, a threaded sleeve and a second traction rod, the first traction rod is rotatably connected to the threaded sleeve, the threaded sleeve is connected to the second traction rod by threads, the first traction rod is rotatably connected to a universal joint, the universal joint is rotatably connected to a fixed block, the second traction rod is connected to a traction bow by a clamping mechanism, and the traction bow is provided with a fixed rod; the first traction rod and the second traction rod are both rotatably connected to an adjustment sleeve, the first traction rod and the second traction rod are both slidably connected to an adjustment block and an active ratchet, the adjustment block is connected to the active ratchet by a pressure spring, the adjustment sleeve is connected to the adjustment block by threads, the first traction rod and the second traction rod are both rotatably connected to an adjustment seat, the adjustment seat is fixedly connected to a driven ratchet matched with the active ratchet, the adjustment seat is rotatably connected to a worm wheel and a worm, the worm wheel is meshed with the worm, both ends of the worm wheel are fixedly connected to threaded rods, the threaded rod is threadedly connected to an adjustment rod, and the adjustment rod is slidably connected to the adjustment seat.
[0007] The principle of the basic technical solution is as follows: the fixed rod and the fixed block are used to connect the two ends of the femur that need to be pulled, the first traction rod is connected to the fixed block through a universal joint, and the second traction rod is connected to the fixed rod through a traction bow. The threaded sleeve is rotated to control the second traction rod to move closer to / away from the first traction rod, thereby changing the combined length of the traction rods; the adjustment sleeve, the adjustment block, the pressure spring, the active ratchet and the driven ratchet are used to limit the adjustment seat, and by rotating the adjustment sleeve, the adjustment block is controlled to move linearly through thread cooperation to achieve the effect of compressing / restoring the pressure spring, so that the adjustment seat is in a fixed / loose state through the cooperation of the active ratchet and the driven ratchet. When the adjustment seat is in a loose state, the angle of the adjustment rod can be changed by rotating the adjustment seat; the worm wheel is driven by the worm to rotate to control the rotation of the threaded rod, thereby controlling the adjustment rod to move linearly along the threaded rod.
[0008] The beneficial effects of the basic technical solution are: the combined length of the traction rod can be changed by rotating the threaded sleeve to achieve the effect of traction of the patient's bones, and the angle of the adjusting rod can be changed by rotating the adjusting rod through the adjusting seat to make it suitable for the corresponding bone dislocation angle. The worm gear is driven by the worm to rotate to control the rotation of the threaded rod, thereby controlling the adjusting rod to move linearly along the threaded rod to achieve the effect of pushing the bones and resetting the patient's bones. The device solves the problem that the existing femoral fracture traction device is usually a fixed structure and is not convenient for resetting the dislocated bones. It does not require cutting a large area of tissue, achieves minimally invasive, shortens the broken bone resetting time, and reduces the patient's pain. It has a simple structure, is easy to operate, and reduces the workload of doctors.
[0009] Preferably, the clamping mechanism includes two groups of connecting rods, the connecting rods are rotatably connected to the traction bow, the connecting rods are provided with sliding grooves, the sliding grooves are slidably connected to a limiting rod, the limiting rod is connected to the traction bow through a tension spring, the second traction rod is provided with a limiting hole, and the limiting rod is slidably connected to the limiting hole.
[0010] Through the above arrangement, the traction bow is connected to the femur through the fixing rod, and the second traction rod can be inserted into the traction bow by rotating the two sets of connecting rods so that the slide groove controls the two sets of limiting rods to move backwards. The handle is released to allow the tension spring to pull the limiting rod to enter the limiting hole, thereby fixing the second traction rod on the traction bow. The modified clamping mechanism is simple to operate and has good stability, which is convenient for use.
[0011] Preferably, the connecting rod is fixedly connected with a handle.
[0012] Through the above arrangement, the rotation of the connecting rod is controlled by the handle, which provides convenience for the user. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is an axonometric diagram of a femoral fracture traction device according to the utility model;
[0014] Figure 2 It is an exploded view of a femoral fracture traction device of the utility model;
[0015] Figure 3 for Figure 2 The enlarged view of point A in the middle;
[0016] Figure 4 for Figure 2 The enlarged view of point B in the middle;
[0017] 1. First traction rod; 2. Threaded sleeve; 3. Second traction rod; 4. Fixed rod; 5. Traction bow; 6. Adjustment rod; 7. Fixed block; 8. Universal joint; 9. Adjustment seat; 10. Adjustment sleeve; 11. Adjustment block; 12. Pressure spring; 13. Active ratchet; 14. Driven ratchet; 15. Worm gear; 16. Threaded rod; 17. Worm; 18. Limit hole; 19. Limit rod; 20. Tension spring; 21. Connecting rod; 22. Slide groove; 23. Handle; 24. Ilium; 25. Femur. DETAILED DESCRIPTION
[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and implementation examples:
[0019] like Figures 1 to 4 A femoral fracture traction device is shown, comprising a first traction rod 1, a threaded sleeve 2 and a second traction rod 3, the first traction rod 1 is rotatably connected to the threaded sleeve 2, the threaded sleeve 2 and the second traction rod 3 are connected by threads, the first traction rod 1 is rotatably connected to a universal joint 8, the universal joint 8 is rotatably connected to a fixed block 7, the second traction rod 3 is connected to a traction bow 5 through a clamping mechanism, the traction bow 5 is provided with a fixed rod 4, the clamping mechanism comprises two groups of connecting rods 21, the connecting rod 21 is rotatably connected to the traction bow 5, the connecting rod 21 is fixedly connected to a handle 23, the connecting rod 21 is provided with a slide groove 22, the slide groove 22 is slidably connected to a limit rod 19, the limit rod 19 is connected to the traction bow 5 through a tension spring 20, the second traction rod 3 is provided with a limit hole 18, the limit rod 19 and the limit The position hole 18 is slidably connected; the first traction rod 1 and the second traction rod 3 are both rotatably connected with an adjustment sleeve 10, and the first traction rod 1 and the second traction rod 3 are both slidably connected with an adjustment block 11 and an active ratchet 13, the adjustment block 11 is connected to the active ratchet 13 through a pressure spring 12, the adjustment sleeve 10 is connected to the adjustment block 11 through a threaded connection, the first traction rod 1 and the second traction rod 3 are both rotatably connected with an adjustment seat 9, the adjustment seat 9 is fixedly connected with a driven ratchet 14 that matches the active ratchet 13, the adjustment seat 9 is rotatably connected with a worm wheel 15 and a worm 17, the worm wheel 15 is meshed with the worm 17, both ends of the worm wheel 15 are fixedly connected with a threaded rod 16, the threaded rod 16 is threadedly connected with an adjusting rod 6, and the adjusting rod 6 is slidably connected to the adjusting seat 9.
[0020] The specific implementation process is as follows:
[0021] When using the present invention, firstly, the adjusting rod 6 is placed at the moving end of the patient's bone dislocation, and then the worm 17 is rotated to drive the worm wheel 15 to rotate, so that the adjusting rod 6 is sleeved on the threaded rod 16 through the threaded rod 16; the fixing block 7 is fixed to the patient's ilium 24 through the fixing screw, and the traction bow 5 is connected to the femur 25 through the fixing rod 4, and then the two groups of handles 23 are pressed to make the two groups approach each other, so as to control the connecting rod 21 to move away from each other, so as to control the two groups of limiting rods 19 to move backwards through the sliding groove 22, and the second traction rod 3 is inserted into the traction bow 5, and then the handle 23 is released, and the tension spring 20 pulls the limiting rod 19 to make it enter the limiting hole 18, so as to fix the second traction rod 3 on the traction bow 5; and then the threaded sleeve 2 is rotated to control the second traction rod 3 to move away from the threaded sleeve 2 through the threaded cooperation, so as to achieve traction of the patient. The purpose of the patient's bone is to restore the bone length; by rotating the worm 17, the worm wheel 15 is driven to rotate, so that the adjusting rod 6 is close to the patient's femur 25 through the threaded rod 16, and then the adjusting seat 9 is rotated to drive the adjusting rod 6 to rotate. After the adjusting rod 6 is at an appropriate angle, the adjusting sleeve 10 is controlled to control the adjusting block 11 to squeeze the pressure spring 12, so that the active ratchet 13 is controlled to receive a larger resistance in its axial direction, and then the adjusting seat 9 is controlled to be stable through the driven ratchet 14, so as to apply a thrust to the patient's femur 25, and then the worm 17 is rotated to drive the worm wheel 15 to rotate, so that the adjusting rod 6 is controlled by the threaded rod 16 to generate pressure on the bone, so as to achieve the effect of resetting the fracture, thereby solving the problem that the existing femoral fracture traction device is usually a fixed structure and is not convenient for resetting the dislocated bone.
[0022] The above is only an embodiment of the utility model, and the common knowledge such as the known specific technical scheme or characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the technical scheme of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.
Claims
1. A femoral fracture traction device, characterized in that: The invention comprises a first traction rod (1), a threaded sleeve (2) and a second traction rod (3); the first traction rod (1) is rotatably connected to the threaded sleeve (2); the threaded sleeve (2) is threadably connected to the second traction rod (3); the first traction rod (1) is rotatably connected to a universal joint (8); the universal joint (8) is rotatably connected to a fixing block (7); the second traction rod (3) is connected to a traction bow (5) via a clamping mechanism; the traction bow (5) is provided with a fixing rod (4); The first traction rod (1) and the second traction rod (3) are both rotatably connected to an adjustment sleeve (10); the first traction rod (1) and the second traction rod (3) are both slidably connected to an adjustment block (11) and an active ratchet (13); the adjustment block (11) and the active ratchet (13) are connected via a pressure spring (12); the adjustment sleeve (10) and the adjustment block (11) are connected via threads; the first traction rod (1) and the second traction rod (3) are both rotatably connected to An adjusting seat (9) is connected, the adjusting seat (9) is fixedly connected with a driven ratchet (14) matched with the active ratchet (13), the adjusting seat (9) is rotatably connected with a worm wheel (15) and a worm (17), the worm wheel (15) is meshed with the worm (17), both ends of the worm wheel (15) are fixedly connected with a threaded rod (16), the threaded rod (16) is threadedly connected with an adjusting rod (6), and the adjusting rod (6) is slidably connected with the adjusting seat (9).
2. A femoral fracture traction device according to claim 1, characterized in that: The clamping mechanism comprises two groups of connecting rods (21), the connecting rods (21) are rotatably connected to the traction bow (5), the connecting rods (21) are provided with a sliding groove (22), the sliding groove (22) is slidably connected to a limiting rod (19), the limiting rod (19) is connected to the traction bow (5) via a tension spring (20), the second traction rod (3) is provided with a limiting hole (18), the limiting rod (19) is slidably connected to the limiting hole (18).
3. A femoral fracture traction device according to claim 2, characterized in that: The connecting rod (21) is fixedly connected with a handle (23).