Device for fixing bone fragments of intertrochanteric fracture
By designing a combined device consisting of a nail rod, nail head, sliding rod, auxiliary nail, and O-ring tension band, the problem of unstable bone nail connection in existing technologies is solved, achieving stable fixation of bone fragments in intertrochanteric fractures of the femur, which is suitable for osteoporosis in elderly patients.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LANZHOU SECOND PEOPLES HOSPITAL
- Filing Date
- 2024-12-31
- Publication Date
- 2026-05-12
AI Technical Summary
In the existing technology, the devices used to fix bone fragments in intertrochanteric fractures of the femur are difficult to connect effectively with bone nails, resulting in instability of fracture fragments in elderly patients with osteoporosis, and an improved fixation device is needed.
A device comprising a nail rod, a nail head, a sliding rod, an auxiliary nail, a push block, a limiting block, and an O-ring tension band is designed. The nail rod is inserted into the fracture site, the sliding rod pushes the push block to rotate, the auxiliary nail abuts against the bone wall, and the limiting block and O-ring tension band provide secondary reinforcement to achieve stable fixation of the fractured bone fragments.
It improves the initial fixation of fractured bone fragments, increases friction, ensures stability at the fracture site, is suitable for elderly patients with osteoporosis, and provides additional fixation support.
Smart Images
Figure CN224220210U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a device for fixing bone fragments in intertrochanteric fractures of the femur. Background Technology
[0002] Subtrochanteric fracture of the femur refers to a fracture that occurs below the greater trochanter and lesser trochanter of the femur. It is a common type of fracture, especially common in elderly people with osteoporosis. This type of fracture is unstable and usually requires surgical treatment combined with rehabilitation training.
[0003] If the bone fragments are large, open internal fixation is recommended to restore them to their original position. Larger fragments can gradually heal over approximately one month, forming a unified whole with other fragments and gradually restoring their original shape. However, when using bone screws, due to the patient's advanced age and overlapping bone fragments, the screws often fail to effectively connect the bone fragments. Therefore, it is necessary to propose a device for fixing bone fragments in intertrochanteric fractures of the femur. Utility Model Content
[0004] The purpose of this invention is to provide a device for fixing bone fragments in intertrochanteric fractures of the femur, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a device for fixing bone fragments in an intertrochanteric fracture of the femur, comprising a nail rod, a nail head, and an O-ring tension band. A sliding groove is provided through the middle of the nail rod, and a sliding rod is slidably connected to the inner wall of the sliding groove. A plurality of mounting grooves are symmetrically and equidistantly provided through the outer wall of the nail rod, and each mounting groove extends into the sliding groove and is rotatably connected to an auxiliary nail.
[0006] The outer wall of the nail rod is provided with a connecting groove through the position of the auxiliary nail. A push block is fixedly connected to one side of the outer wall of the auxiliary nail. The push block extends into the connecting groove. One end of the slide rod extends out of the slide groove and is fixedly connected with a nail head. The outer wall of the nail rod is fixedly connected to a limiting block in a circumferential shape. An O-ring tension band is sleeved on the outer wall of the limiting block.
[0007] Preferably, the end of the slide groove away from the nail head is provided with a blocking groove, and a blocking block is slidably connected to the inner wall of the blocking groove, and the blocking block is fixedly connected to the slide rod.
[0008] Preferably, the outer wall of the end of the nail shank away from the nail head is threaded.
[0009] Preferably, the auxiliary nail and the push block are arranged in an L-shape.
[0010] Preferably, the limiting block is T-shaped and abuts against the nail head.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: the nail rod is inserted into the bone fragment of the patient's femoral trochanter fracture, the nail rod is used to initially fix the patient's fracture bone fragment, the nail head and the slide rod are pushed to move inward, the slide rod pushes the push block and the auxiliary nail to rotate outward, so that the auxiliary nail abuts against the patient's bone wall, increasing the friction of the slide rod, the limiting block limits the nail head, the O-ring tension band is sleeved on the outside of the limiting block, the O-ring tension band is used to limit the nail rod, and the patient's fracture bone fragment is reinforced a second time. Attached Figure Description
[0012] Figure 1 This is a front view structural diagram of the present utility model;
[0013] Figure 2 This is a schematic cross-sectional view of the nail rod of this utility model;
[0014] Figure 3 This is a front view schematic diagram of the nail rod structure of this utility model;
[0015] Figure 4 This is a front view schematic diagram of the slide bar structure of this utility model;
[0016] Figure 5 This is a front view schematic diagram of the auxiliary nail structure of this utility model;
[0017] Figure 6 This is a front view structural diagram of the O-shaped tension band of this utility model.
[0018] In the diagram: 1. Nail rod; 2. Nail head; 3. Slide rod; 4. Auxiliary nail; 5. Push block; 6. O-ring tension band; 7. Limiting block; 8. Blocking block. Detailed Implementation
[0019] Please see Figure 1-6 This utility model provides a technical solution: a device for fixing bone fragments in an intertrochanteric fracture of the femur, including a nail rod 1, a nail head 2, and an O-ring tension band 6. A sliding groove is provided through the middle of the nail rod 1, and a sliding rod 3 is slidably connected to the inner wall of the sliding groove. Several mounting grooves are symmetrically and equidistantly provided through the outer wall of the nail rod 1, and each mounting groove extends into the sliding groove and is rotatably connected to an auxiliary nail 4.
[0020] The outer wall of the nail rod 1 is provided with a connecting groove through the position of the auxiliary nail 4. A push block 5 is fixedly connected to one side of the outer wall of the auxiliary nail 4. The push block 5 extends into the connecting groove. One end of the slide rod 3 extends out of the slide groove and is fixedly connected with a nail head 2. The outer wall of the nail rod 1 is fixedly connected with a limiting block 7 in a circumferential shape. An O-shaped tension band 6 is sleeved on the outer wall of the limiting block 7.
[0021] The sliding groove has a blocking groove at the end away from the nail head 2. A blocking block 8 is slidably connected to the inner wall of the blocking groove. The blocking block 8 is fixedly connected to the sliding rod 3, so that the blocking block 8 can be used to prevent the sliding rod 3 from moving out of the nail rod 1.
[0022] The outer wall of the end of the nail shank 1 away from the nail head 2 is threaded.
[0023] Among them, the auxiliary nail 4 and the push block 5 are arranged in an L-shape.
[0024] The limiting block 7 is T-shaped and abuts against the nail head 2.
[0025] Specifically, when using this invention, the nail rod 1, nail head 2, slide rod 3, auxiliary nail 4, and limiting block 7 are all made of metal, and the O-ring tension band is made of elastic material. The nail rod 1 is nailed into the patient's fractured bone fragment, and the fractured bone fragment is fixed by the nail rod 1. The nail head 2 is pressed inward, and the nail head 2 pushes the slide rod 3 to move inward. The slide rod 3 pushes the push block 5 to move downward. The push block 5 pushes the auxiliary nail 4 out of the nail rod 1 and abuts against the bone wall. The nail head 2 is pressed into the limiting block 7. The two ends of the O-ring tension band 6 are respectively attached to the outer wall of the limiting block 7 at one end of different nail rods 1. The O-ring tension band 6 provides secondary reinforcement to the patient's fractured bone fragment. After the patient's bone has healed, the O-ring tension band 6 is removed.
Claims
1. A device for fixing bone fragments in an intertrochanteric fracture of the femur, comprising a nail rod (1) and a nail head (2) and an O-ring tension band (6), characterized in that, A sliding groove is provided through the middle position of the nail rod (1), and a sliding rod (3) is slidably connected to the inner wall of the sliding groove. Several mounting grooves are symmetrically and equidistantly provided through the outer wall of the nail rod (1). All mounting grooves extend into the sliding groove and are rotatably connected to auxiliary nails (4). The outer wall of the nail rod (1) is provided with a connecting groove through the position of the auxiliary nail (4). A push block (5) is fixedly connected to one side of the outer wall of the auxiliary nail (4). The push block (5) extends into the connecting groove. One end of the slide rod (3) extends out of the slide groove and is fixedly connected with a nail head (2). The outer wall of the nail rod (1) is fixedly connected to a limiting block (7) in a circumferential shape. An O-shaped tension band (6) is sleeved on the outer wall of the limiting block (7).
2. The device for fixing bone fragments in an intertrochanteric fracture of the femur according to claim 1, characterized in that: The end of the slide away from the nail head (2) is provided with a blocking groove, and the inner wall of the blocking groove is slidably connected with a blocking block (8), which is fixedly connected to the slide rod (3).
3. The device for fixing bone fragments in an intertrochanteric fracture of the femur according to claim 1, characterized in that: The outer wall of the end of the nail rod (1) away from the nail head (2) is threaded.
4. The device for fixing bone fragments in an intertrochanteric fracture of the femur according to claim 1, characterized in that: The auxiliary nail (4) and the push block (5) are arranged in an L-shape.
5. The device for fixing bone fragments in an intertrochanteric fracture of the femur according to claim 1, characterized in that: The limiting block (7) is T-shaped and abuts against the nail head (2).