Crochet needle for fixing greater trochanter of femur

Abstract

The utility model relates to the technical field of medical instruments, in particular to a bearded needle for fixing greater trochanter of femur, which comprises a bearded needle main body, a pointed cone part is formed at one end of the bearded needle main body, a plurality of cable channel pieces are arranged on the bearded needle main body, and a plurality of cable through holes are formed on the cable channel pieces. By means of the arrangement, when a thighbone greater trochanter fracture is subjected to surgical fixation, an operator inserts the pointed cone part into a thighbone greater trochanter fracture block to be fixed, then the hooked needle body is integrally attached to the outer side of a thighbone greater trochanter and the outer side of a femoral shaft, and finally a cable (preferably a titanium cable) commonly used in the orthopedics department penetrates through the cable via hole in the cable channel piece to be fixed to the thighbone greater trochanter fracture block. The fixing device for the femoral lesser trochanter and the femoral shaft respectively bypasses the femoral lesser trochanter and the femoral shaft to bind fracture blocks, so that the femoral lesser trochanter fracture blocks and the femoral shaft are fixed, the fixing device is simple in structure and convenient to use and operate, and the internal fixation stability of the lesser trochanter fracture can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and specifically to a hook needle used for fixing the greater trochanter of the femur. Background Technology

[0002] With the development of total hip arthroplasty techniques, an increasing number of elderly patients with hip trauma have achieved good joint function after undergoing the procedure. However, with the accelerating aging of my country's population, a significant proportion of elderly people who underwent hip replacement surgery in their early years are experiencing a rising incidence of periprosthetic femoral fractures due to falls. These fracture patients are mostly elderly, with multiple underlying diseases and significant osteoporosis, and conservative treatment carries a higher risk of complications and mortality. Although surgery is the best option when the patient's condition permits, the technical challenges far exceed those of primary hip replacement, especially when combined with a greater trochanter fracture. Fracture reduction and robust fixation are crucial factors for surgical success. For greater trochanter fractures, commonly used internal fixation methods include wire or titanium cable cerclage fixation. In patients with an artificial joint prosthesis, greater trochanter revision plates are often used for fixation. Each of the above methods has its advantages and disadvantages. First, the wire or titanium cable binding and ligation method forms a single ring structure and is not integrated with the femur as a whole. It merely binds the bone block around, which is not stable enough in terms of its own fixation and resistance to bone block slippage, which is not conducive to early rehabilitation exercises. On the other hand, due to the differences in the anatomical shape of the greater trochanter of the femur among different patients, although the revision plate of the greater trochanter with a fixed shape can press the movable greater trochanter by pressing it at the proximal end, its wide outline and thickness make it impossible to pre-bend the plate to match the proximal femoral anatomy. Moreover, it is difficult to avoid extensive dissection of the surrounding muscles and soft tissues during the insertion process, which can lead to serious complications such as poor plate positioning, muscle damage, nonunion of fractures, iliotibial band friction, and limping gait, ultimately affecting the surgical outcome.

[0003] Therefore, it is particularly necessary to design a surgical instrument for fixing the greater trochanter of the femur. Utility Model Content

[0004] To address the problems of existing technologies, this invention provides a hook for fixing the greater trochanter of the femur, which has a simple structure, low cost, high operational flexibility, and can ensure the stability of internal fixation for greater trochanter fractures.

[0005] To achieve the above objectives, the technical solution applied in this utility model is as follows:

[0006] A hook for fixing the greater trochanter of the femur includes a hook body, one end of which is formed with a pointed cone, and the hook body is provided with multiple cable channel components, each with multiple cable through holes.

[0007] According to the above scheme, multiple fixing teeth are formed on one side of the outer wall of the cable channel component.

[0008] According to the above scheme, the multiple fixing teeth are spaced apart on one side of the outer wall of the cable channel component, and the fixing teeth are triangular in structure.

[0009] According to the above scheme, the plurality of cable vias are spaced apart on the cable channel component, and the cable vias are round holes with a diameter of 2mm.

[0010] According to the above scheme, the cross-section of the cable channel component is a rounded rectangular structure.

[0011] According to the above scheme, the cable channel component includes a first cable channel component and a second cable channel component. The first cable channel component is located near the first end of the hook body, and the second cable channel component is located near the second end of the hook body.

[0012] According to the above scheme, the hook body has a large ridge profile near the pointed cone, the first cable channel component is located inside the large ridge profile, and a bend is formed between the large ridge profile and the pointed cone.

[0013] According to the above scheme, the hook body is a cylindrical structure with a diameter of 2-5mm.

[0014] The beneficial effects of this utility model are:

[0015] This invention is designed such that, during surgical fixation of a greater trochanter fracture, the surgeon inserts the pointed tip into the greater trochanter fracture fragment for fixation, then attaches the entire hook body to the lateral side of the greater trochanter and femoral shaft. Finally, a commonly used orthopedic cable (preferably titanium cable) is passed through the cable through-hole on the cable channel component and bypasses the lesser trochanter and femoral shaft to complete the binding of the fracture fragment, thereby fixing the greater trochanter fracture fragment and femoral shaft. Its structure is simple, easy to use and operate, and can ensure the stability of internal fixation for the greater trochanter fracture. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the crochet hook body of this utility model;

[0017] Figure 2 This is a schematic diagram of the working body of a single crochet hook in Example 1;

[0018] Figure 3 This is a schematic diagram of the main body of the double crochet hook in Example 2.

[0019] In the picture:

[0020] 1. Hook body; 11. Conical part; 12. Large convex hook-shaped part; 2. Cable channel component; 21. First cable channel component; 22. Second cable channel component; 23. Cable through hole; 24. Fixing tooth; 3. Cable. Detailed Implementation

[0021] The technical solution of this utility model will be described below with reference to the accompanying drawings and embodiments.

[0022] Example 1:

[0023] like Figure 1 and Figure 2 As shown, the present invention provides a hook for fixing the greater trochanter of the femur, comprising a hook body 1, one end of which is formed with a pointed cone 11, and the hook body 1 is provided with a plurality of cable channel components 2, and the cable channel components 2 are formed with a plurality of cable through holes 23. With this setup, during surgical fixation of greater trochanter fractures, the surgeon inserts the tip 11 into the greater trochanter fracture fragment for fixation. The hook body 1 is then attached to the lateral aspect of the greater trochanter and femoral shaft. Finally, a commonly used orthopedic cable 3 (preferably titanium cable) is passed through the cable through-hole 23 on the cable channel 2, bypassing the lesser trochanter and femoral shaft to complete the binding of the fracture fragment, thus fixing the greater trochanter fracture fragment and femoral shaft. This design is simple, convenient to use and operate, and ensures the stability of internal fixation for greater trochanter fractures. Compared to existing technologies using steel plates, the hook body 1 described in this invention is more easily aligned with the lateral femoral anatomy during surgery, and the insertion process of the hook body 1 has a much smaller impact on the gluteus medius and vastus lateralis muscles than traditional steel plates. It is particularly suitable for solving the fixation problem of greater trochanter fractures often encountered in primary total hip arthroplasty or revision surgery.

[0024] Furthermore, multiple fixing teeth 24 are formed on one outer wall of the cable channel component 2. This arrangement allows the cable channel component 2 to be fixedly locked onto the greater trochanter of the femur and the outer side of the femoral shaft, preventing the hook body 1 from sliding up and down. Specifically, by tightening the cable 3 (preferably a titanium cable), the multiple fixing teeth 24 are firmly embedded in the outer surface of the greater trochanter of the femur and the femoral shaft, preventing the hook body 1 from sliding up and down, further improving the reliability of the fixation.

[0025] Furthermore, the plurality of fixing teeth 24 are spaced apart on one side of the outer wall of the cable channel component 2, and the fixing teeth 24 have a triangular structure. This arrangement is simple in structure, and the multiple fixing teeth 24 can make the locking effect more stable.

[0026] Furthermore, the plurality of cable vias 23 are spaced apart on the cable channel component 2. The cable vias 23 are circular holes with a diameter of 2mm. This arrangement allows cables to be selectively threaded through the desired cable vias 23 for bundling as needed, and the 2mm diameter design is compatible with commonly used 1.2mm and 1.8mm diameter cables 3 (preferably titanium cables).

[0027] Furthermore, the cross-section of the cable channel component 2 is a rounded rectangular structure.

[0028] Furthermore, the cable channel component includes a first cable channel component 21 and a second cable channel component 22. The first cable channel component 21 is located near the first end of the hook body 1, and the second cable channel component 22 is located near the second end of the hook body 1. This configuration allows for convenient use, as the first cable channel component 21 is used for securing and passing the suture to the greater trochanter of the femur, and the second cable channel component 22 is used for securing and passing the suture to the femoral shaft.

[0029] Furthermore, the hook body 1 has a greater trochanter contour portion 12 formed near the tip 11, and the first cable channel 21 is located within the greater trochanter contour portion 12, with a bend between the greater trochanter contour portion 12 and the tip 11. This arrangement allows the greater trochanter contour portion 12 to fit closely to the greater trochanter of the femur, thereby facilitating the tip 11 to be inserted into the greater trochanter fracture fragment. Combined with the first cable channel 21 and the cable 3 (preferably a titanium cable), the hook achieves the fixation effect on the greater trochanter fracture fragment.

[0030] In practical applications, the initial shape of the greater trochanter contour 12 of the hook needle is similar to the average shape of the greater trochanter of the human body, but it is impossible to fit every patient. Therefore, the hook needle body 1 is preferably a flexible structure, which can be flexibly bent by the surgeon to better fit the greater trochanter of the femur and the lateral surface of the femoral shaft, and has strong operational flexibility.

[0031] Furthermore, the hook body 1 is a cylindrical structure with a diameter of 2-5mm. This design results in a simple structure, small overall volume, small space occupation, and minimal impact on the gluteus medius and vastus lateralis muscles.

[0032] In practical applications, the larger the diameter of the hook body 1, the more difficult it is to pre-bend, and the more damage it will cause to the surrounding muscles when inserted; while if the diameter is too small, it will be too soft and lack rigidity. Therefore, a diameter of 2-5mm is designed for the best effect.

[0033] It should be noted that the hook needle described in this utility model is mainly designed for fit based on the anatomy of the proximal femur. Even when encountering anatomically varied proximal femurs, a single hook needle can be more easily pre-bent by the surgeon to fit the anatomy of each patient's femur by hand compared to traditional steel plates. A single hook needle has a small structural volume, which can better reduce the irritation of the implant to the muscles and surgical dissection damage.

[0034] Example 2:

[0035] like Figure 3 As shown, to address different fracture morphologies and stability requirements of the greater trochanter, two or more hook bodies can be flexibly used for parallel fixation, which greatly improves the stability after fracture fixation.

[0036] The difference between this second embodiment and the first embodiment is that the first embodiment uses a single crochet hook body 1, while the second embodiment uses a double crochet hook body 1. The rest of the structure and principle are the same as those of the first embodiment, and will not be repeated.

[0037] The embodiments of the present utility model have been described above with reference to the accompanying drawings. However, the present utility model is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present utility model without departing from the spirit and scope of the claims. All of these forms are within the scope of protection of the present utility model.

Claims

1. A hook for fixing the greater trochanter of the femur, characterized in that: It includes a hook body (1), one end of which is formed with a pointed cone (11), and the hook body (1) is provided with multiple cable channel components (2), and the cable channel components (2) are formed with multiple cable through holes (23).

2. The hook for greater trochanter fixation according to claim 1, wherein: Multiple fixing teeth (24) are formed on one side of the outer wall of the cable channel component (2).

3. A hook for use in the fixation of the greater trochanter of a femur according to claim 2, wherein: The plurality of fixing teeth (24) are spaced apart on one side of the outer wall of the cable channel component (2), and the fixing teeth (24) are triangular in structure.

4. The hook for greater trochanter fixation according to claim 2, wherein: The plurality of cable vias (23) are spaced apart on the cable channel component (2), and the cable vias (23) are round holes with a diameter of 2 mm.

5. The hook for greater trochanter fixation according to claim 2, wherein: The cross-section of the cable channel component (2) is a rounded rectangular structure.

6. The hook for greater trochanter fixation according to claim 2, wherein: The cable channel component (2) includes a first cable channel component (21) and a second cable channel component (22). The first cable channel component (21) is located near the first end of the hook body (1), and the second cable channel component (22) is located near the second end of the hook body (1).

7. A hook for use in the fixation of the greater trochanter of a femur according to claim 6, wherein: The hook body (1) has a large trochanter profile (12) formed near the cone (11), the first cable channel (21) is located inside the large trochanter profile (12), and a bend is formed between the large trochanter profile (12) and the cone (11).

8. The hook for greater trochanter fixation according to claim 2, wherein: The hook body (1) is a cylindrical structure, and the diameter of the hook body (1) is 2-5mm.

Images