Bone distraction instrument for treating femoral head necrosis
By designing a bone stenting device for the treatment of femoral head necrosis, the fixation and length adjustment of the femoral is achieved using arc splints and adjustment devices, the problem of difficult to control the disease development of femoral head necrosis patients in the middle and late stages of femoral head necrosis is solved, and stable traction support is provided, which improves the physiological and mechanical environment of the femoral.
Patent Information
- Application Number
- CN202510008358.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-03
- Publication Date
- 2025-04-11
AI Technical Summary
In the treatment of femoral head necrosis, it is difficult to effectively solve the development of advanced patients' disease, and the failure rate of hip-keeping technology is high, resulting in increased physical and mental pain and economic burden of patients.
A bone stretching device for the treatment of femoral head necrosis is designed, including two arc-shaped splints, adjustment devices and connection devices. The adjustment of the threaded rod and rotating nuts can achieve the fixation and length adjustment of the femur to provide traction support.
This bone stretching device can be easily adjusted and fixed, suitable for the needs of different users, provides stable traction support, helps improve the physiological and mechanical environment of the femur and reduces disease progression.
Smart Images
Figure CN119791809A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of distraction devices, in particular to a bone distraction device for treating femoral head necrosis. Background Art
[0002] The treatment of femoral head necrosis remains a challenge for orthopedic surgeons. The treatment methods for femoral head necrosis mainly include core decompression, porous tantalum rod placement, vascularized bone transplantation, hip replacement and osteotomy. For patients with early and middle stage femoral head necrosis, core decompression, porous tantalum rod placement, bone grafting and osteotomy can be used for head preservation treatment; but for patients with late stage femoral head necrosis, even if a satisfactory local physiological and mechanical environment is restored, the progression of the disease cannot be reversed, and most of them require hip replacement. Among them, hip preservation technology based on core decompression has become the most commonly used means of treating early and middle stage femoral head necrosis.
[0003] Core decompression can reduce intraosseous pressure and improve blood circulation in the femoral head. Core decompression combined with porous tantalum rod placement or bone grafting can provide mechanical support for the subchondral bone and delay or prevent the collapse of the femoral head. However, the difficulty of revascularization and reossification of the necrotic area of the femoral head is still relatively high. In clinical practice, cases of failure of hip preservation technology based on core decompression to treat femoral head necrosis still occur from time to time, which brings great physical and mental pain and economic burden to patients. Summary of the invention
[0004] The technical problem to be solved by the present invention is to overcome the above technical defects and provide a stretching device which can be easily adjusted and not only conveniently fixed but also conveniently adjusted in length according to different users.
[0005] In order to solve the above problems, the technical solution of the present invention is: a bone distraction device for treating femoral head necrosis, comprising two arc-shaped splints, an adjusting device and a connecting device;
[0006] The adjusting device is located between the two arc-shaped clamping plates, and comprises two fixing plates, the two fixing plates are respectively fixedly connected to the arc-shaped clamping plates, and a connecting strip is inserted therebetween, a threaded rod is rotatably connected to one of the arc-shaped clamping plates, the end of the threaded rod is fixedly connected to a rotating nut, and the other end of the threaded rod is connected to an arc-shaped clamping plate, the connecting device comprises a groove, the groove is located on one of the fixing plates, a connecting tube is rotatably connected in the groove, an adjusting plate is inserted in the connecting tube, a U-shaped plate is fixedly connected at the bottom of the adjusting plate, a plurality of evenly distributed fixing holes 2 are provided on the U-shaped plate, an arc-shaped plate is slidably connected in the U-shaped plate, a plurality of evenly distributed fixing holes 3 are provided on the arc-shaped plate, and fixing bolts are inserted in the fixing holes 3.
[0007] Furthermore, the inner side walls of the two arc-shaped clamping plates are both bonded with a rubber layer.
[0008] Furthermore, the adjustment plate is provided with a plurality of evenly distributed fixing holes, and the fixing holes are provided with adjusting bolts.
[0009] Furthermore, a second fixing bolt is inserted into the second fixing hole.
[0010] Furthermore, the rotating nut has a polygonal structure inside for adjustment and fixation.
[0011] The advantages of the present invention compared with the prior art are:
[0012] The present invention is provided with two arc-shaped splints. By adjusting the threaded rods between the two arc-shaped splints and rotating the rotating nut, the distance between the two arc-shaped splints can be adjusted, thereby fixing the femur. The position of the arc-shaped plate can be adjusted up and down by using the fixing hole 2 on the U-shaped plate, and then the fixing bolts on the arc-shaped plate can be used to adjust and fix it, thereby fixing and supporting the femur. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 The present invention is a three-dimensional bone distraction device for treating femoral head necrosis. Figure 1 .
[0014] Figure 2 The present invention is a three-dimensional bone distraction device for treating femoral head necrosis. Figure 2 .
[0015] As shown in the figure: 1. Arc-shaped clamping plate; 2. Fixed plate; 3. Threaded rod; 4. Rotating nut; 5. Connecting tube; 6. Adjusting plate; 7. Fixed hole; 8. Adjusting bolt; 9. U-shaped plate; 10. Fixed hole 2; 11. Arc-shaped plate; 12. Fixed bolt. DETAILED DESCRIPTION
[0016] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings, wherein the same components are represented by the same reference numerals.
[0017] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.
[0018] In order to make the contents of the present invention more clearly understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.
[0019] like Figure 1 to Figure 2As shown, a bone distraction device for treating femoral head necrosis comprises two arc-shaped splints 1, an adjusting device and a connecting device; the adjusting device is located between the two arc-shaped splints 1, and comprises two fixing plates 2, the two fixing plates 2 are fixedly connected to the arc-shaped splints 1 respectively, and a connecting strip is inserted therebetween, one of the arc-shaped splints 1 is rotatably connected with a threaded rod 3, the end of the threaded rod 3 is fixedly connected with a rotating nut 4, the other end of the threaded rod 3 is connected to an arc-shaped splint 1, the connecting device comprises a groove, the groove is located on one of the fixing plates 2, a connecting tube 5 is rotatably connected in the groove, an adjusting plate 6 is inserted in the connecting tube 5, a U-shaped plate 9 is fixedly connected at the bottom of the adjusting plate 6, a plurality of evenly distributed fixing holes 2 10 are provided on the U-shaped plate 9, an arc-shaped plate 11 is slidably connected in the U-shaped plate 9, a plurality of evenly distributed fixing holes 3 are provided on the arc-shaped plate 11, and a fixing bolt 12 is inserted in the fixing hole 3.
[0020] The inner side walls of the two arc-shaped clamping plates 1 are both pasted with a rubber layer, the adjustment plate 6 is provided with a plurality of evenly distributed fixing holes 7, the fixing holes 7 are provided with adjusting bolts 8, the fixing holes 10 are inserted with fixing bolts 2, and the rotating nut 4 has a polygonal structure for adjustment and fixing.
[0021] In specific use, such as Figure 1 and Figure 2 As shown, when in use, two arc-shaped splints 1 are placed on both sides of the femur, and then the rotation of the threaded rod 3 drives the displacement of the arc-shaped splints 1 thereon, so as to clamp the femur. In this process, the rubber layer on the inner wall of the arc-shaped splint 1 can be used for protection, and then the connecting tube 5 rotating on the fixing plate 2 can be used to adjust the angle, and the adjusting plate 6 in the connecting tube 5 is pulled and fixed with the adjusting bolt 8, and then the arc plate 11 is slid in the U-shaped plate 9, and the femur is fixed with the fixing bolt 12, which can avoid damage to the femur and play a traction role.
[0022] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.
Claims
1. A bone distraction device for treating femoral head necrosis, characterized in that: It comprises two arc-shaped clamping plates (1), an adjusting device and a connecting device; The adjusting device is located between the two arc-shaped clamping plates (1), and comprises two fixing plates (2). The two fixing plates (2) are respectively fixedly connected to the arc-shaped clamping plates (1), and a connecting strip is inserted therebetween. A threaded rod (3) is rotatably connected to one of the arc-shaped clamping plates (1), and a rotating nut (4) is fixedly connected to the end of the threaded rod (3). The other end of the threaded rod (3) is connected to an arc-shaped clamping plate (1). The connecting device comprises a groove, and the groove is located on one of the fixing plates (2). A connecting tube (5) is rotatably connected in the groove, and an adjusting plate (6) is inserted in the connecting tube (5). A U-shaped plate (9) is fixedly connected to the bottom of the adjusting plate (6), and a plurality of evenly distributed fixing holes (2) (10) are provided on the U-shaped plate (9). A curved plate (11) is slidably connected in the U-shaped plate (9), and a plurality of evenly distributed fixing holes (3) are provided on the curved plate (11). A fixing bolt (12) is inserted in the fixing hole (3).
2. A bone distraction device for treating femoral head necrosis according to claim 1, characterized in that: The inner side walls of the two arc-shaped clamping plates (1) are both bonded with a rubber layer.
3. A bone distraction device for treating femoral head necrosis according to claim 1, characterized in that: The adjustment plate (6) is provided with a plurality of evenly distributed fixing holes (7), and the fixing holes (7) are provided with adjusting bolts (8).
4. A bone distraction device for treating femoral head necrosis according to claim 1, characterized in that: A second fixing bolt is inserted into the second fixing hole (10).
5. A bone distraction device for treating femoral head necrosis according to claim 1, characterized in that: The rotating nut (4) has a polygonal structure inside and is used for adjustment and fixing.