Interlocking intramedullary nail for femoral fracture reduction

Abstract

The interlocking intramedullary nail comprises a nail body, the nail body is arc-shaped and has a certain angle, positioning holes are symmetrically formed in the two ends of the nail body, a fixing rod is clamped and embedded in one end of the nail body, a fixing structure is fixedly installed at one end of the fixing rod, a nail head is clamped and embedded in one end of the nail body, and a positioning screw is installed on the surface of the nail head in a matched mode. The number of the positioning screws is two, the positioning screws are evenly installed on the surface of the nail head, the limiting screws are installed on the surface of the fixing rod in a matched mode, the supporting screws are installed on the surface of the fixing rod in a matched mode, and the limiting screws and the supporting screws are matched and installed on the surface of the fixing rod in a matched mode. The purposes that the nail body can be adjusted according to the thighbone of the patient and the fracture part can be prevented from loosening are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of intramedullary nails for femoral fractures, in particular to an interlocking intramedullary nail for femoral fracture reduction. Background Art

[0002] Interlocking intramedullary nailing (IIN) is a surgical technique commonly used to treat femoral fractures. The femur is one of the longest bones in the human body, so femoral fractures are one of the more common types of fractures. The basic principle of interlocking intramedullary nailing is to stabilize and reinforce the fracture site by inserting a metal nail into the medullary cavity of the fracture. This nail passes through the medullary cavity and fixes the broken ends of the fracture with transverse screws to provide fracture stability. Since this technology is an internal fixation, there is no need to cut soft tissue on a large scale during the operation, which is conducive to improving the speed of fracture healing and reducing the risk of infection. In addition, interlocking intramedullary nailing can also preserve physiological intramedullary blood supply to help the fracture site recover.

[0003] However, the length of the existing nail body is fixed and cannot be replaced according to the patient's femur length, which is inconvenient to use. At the same time, when in use, the traditional bolt is a single bolt, which is prone to loosening and causing secondary injury when fixing the fracture site. Therefore, in order to solve the above problems, a locking intramedullary nail for femoral fracture reduction is proposed, which can adjust the nail body according to the patient's femur and prevent loosening of the fracture site. Utility Model Content

[0004] The utility model aims to provide a locking intramedullary nail for femoral fracture reduction to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A locking intramedullary nail for femoral fracture reduction comprises a nail body, a fixing rod is provided at one end of the nail body, a nail head is provided at one end of the nail body, a positioning screw is adapted to be provided on the surface of the nail head, a limiting screw is adapted to be provided on the surface of the fixing rod, and a supporting screw is adapted to be provided on the surface of the fixing rod.

[0007] Furthermore, positioning holes are symmetrically provided at both ends of the nail body.

[0008] Furthermore, a fixing structure is provided at one end of the fixing rod.

[0009] Furthermore, a positioning sleeve is provided at one end of the nail head, a positioning plate is fixedly provided on the inner wall of the positioning sleeve, positioning rings are fixedly provided on both sides of the positioning plate, a positioning spring is adapted to be provided on the surface of the positioning ring, a positioning pressure rod is fixedly provided at one end of the positioning spring, and the positioning pressure rod is adapted to the positioning hole.

[0010] Furthermore, there are two positioning screws, which are evenly installed on the surface of the nail head.

[0011] Furthermore, the limit screw is adapted to the support screw and is adapted to be installed on the surface of the fixing rod.

[0012] Furthermore, the nail body is arc-shaped and has a certain angle.

[0013] Preferably, in order to satisfy the requirement that the nail body can be adjusted and replaced according to the patient's femur, a nail head is provided at one end of the nail body and a fixing rod is provided at the other end of the nail body.

[0014] Preferably, in order to prevent the fracture site from loosening and causing secondary injury to the patient, resulting in slower recovery, a limit screw and a support screw are provided on the surface of the fixation rod.

[0015] Preferably, in order to make the interlocking intramedullary nail better adapt to the physiological structure of the femur, increase the restoration of bone mechanics and improve stability, the nail body is set to be arc-shaped.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] (1) In order to be able to adjust and replace the nail body according to the patient's femur, a nail head is provided at one end of the nail body and a fixing rod is provided at the other end of the nail body. When in use, the nail body is replaced according to the length of the user's femur, and the positioning pressure rod is pressed so that the positioning pressure rod applies pressure to the positioning spring to cause deformation, so that the contraction of the positioning pressure rod facilitates the positioning sleeve to be sleeved on the inner wall of the nail body, and the positioning sleeve is moved to move the positioning pressure rod to the positioning hole on the surface of the nail body, so that the elastic restoring force generated by the positioning spring pushes the positioning pressure rod to move, so that the positioning pressure rod is embedded in the positioning hole, and the nail head is connected to the nail body. After the above process, the fixing rod at the other end can also be connected to the nail body through the fixing structure, wherein the fixing structure is the same as the internal structure of the positioning sleeve at one end of the nail head.

[0018] (2) In order to prevent the fracture site from loosening and causing secondary injury to the patient, resulting in slower recovery, a limit screw and a support screw are provided on the surface of the fixation rod. After the nail body is fixed, two limit screws are embedded in the surface of the fixation rod, and then the support screw is embedded in the surface of the fixation rod, and one end of the support screw is passed through the two limit screws to connect the limit screw and the support screw, thereby increasing the stability of the limit screw and the support screw and preventing the fracture site from moving after fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the angle display structure of a locking intramedullary nail for femoral fracture reduction proposed by the utility model;

[0020] Figure 2This is a schematic structural diagram of a locking intramedullary nail for femoral fracture reduction proposed by the utility model;

[0021] Figure 3 This is a schematic diagram of the unfolded structure of the nail head of a locking intramedullary nail for femoral fracture reduction proposed by the utility model;

[0022] Figure 4 This is a schematic diagram of the cross-sectional structure of a nail head of a locking intramedullary nail for femoral fracture reduction proposed by the utility model;

[0023] Figure 5 The utility model is a schematic diagram of the local structure of a fixing rod of an interlocking intramedullary nail for femoral fracture reduction.

[0024] In the figure: 1, nail body; 2, fixing rod; 3, nail head; 4, positioning screw; 5, limit screw; 6, support screw; 101, positioning hole; 201, fixing structure; 301, positioning pressure rod; 302, positioning sleeve; 303, positioning plate; 304, positioning ring; 305, positioning spring. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] Embodiment 1:

[0027] See also Figure 1-5The utility model provides a technical solution: an interlocking intramedullary nail for femoral fracture reduction, comprising a nail body 1, the nail body 1 is arc-shaped and has a certain angle, positioning holes 101 are symmetrically installed at both ends of the nail body 1, a fixing rod 2 is embedded and installed at one end of the nail body 1, a fixing structure 201 is fixedly installed at one end of the fixing rod 2, a nail head 3 is embedded and installed at one end of the nail body 1, a positioning sleeve 302 is fixedly installed at one end of the nail head 3, a positioning plate 303 is fixedly installed on the inner wall of the positioning sleeve 302, positioning rings 304 are fixedly installed on both sides of the positioning plate 303, a positioning spring 305 is adapted to be installed on the surface of the positioning ring 304, a positioning pressure rod 301 is fixedly installed on one end of the positioning spring 305, the positioning pressure rod 301 is adapted to the positioning hole 101, a positioning screw 4 is adapted to be installed on the surface of the nail head 3, two positioning screws 4 are provided, the positioning screws 4 are evenly installed on the surface of the nail head 3, a limit screw 5 is adapted to be installed on the surface of the fixing rod 2, and a fixed The surface of the rod 2 is adapted to install the support screw 6, and the limit screw 5 is adapted to and installed on the surface of the fixing rod 2. When in use, the nail body 1 is replaced according to the femur length of the user, and the positioning pressure rod 301 is pressed to make the positioning pressure rod 301 exert pressure on the positioning spring 305 to produce deformation, so that the contraction of the positioning pressure rod 301 facilitates the positioning sleeve 302 to be sleeved on the inner wall of the nail body 1, and the positioning sleeve 302 is moved to make the positioning pressure rod 301 move to the positioning hole 101 on the surface of the nail body 1, so that the elastic restoring force generated by the positioning spring 305 pushes the positioning pressure rod 301 to move, so that the positioning pressure rod 301 is embedded in the positioning hole 101, and the nail head 3 is connected to the nail body 1. After the above process, the fixing rod 2 at the other end can also be connected to the nail body 1 through the fixing structure 201, wherein the fixing structure 201 has the same internal structure as the positioning sleeve 302 at one end of the nail head 3.

[0028] Embodiment 2:

[0029] See also Figure 1-5 The utility model provides a technical solution: an interlocking intramedullary nail for femoral fracture reduction, comprising a nail body 1, the nail body 1 is arc-shaped and has a certain angle, positioning holes 101 are symmetrically installed at both ends of the nail body 1, a fixing rod 2 is installed at one end of the nail body 1, a fixing structure 201 is installed at one end of the fixing rod 2, a nail head 3 is installed at one end of the nail body 1, and a positioning screw 4 is adapted to be installed on the surface of the nail head 3. A total of two positioning screws 4 are installed, and the positioning screws 4 are evenly installed on the surface of the nail head 3, a limiting screw 5 is adapted to be installed on the surface of the fixing rod 2, and a supporting screw 6 is adapted to be installed on the surface of the fixing rod 2. The limiting screw 5 is adapted to the supporting screw 6 and is adapted to be installed on the surface of the fixing rod 2. When the nail body 1 is fixed, the two limiting screws 5 are embedded in the surface of the fixing rod 2, and then the supporting screw 6 is embedded in the surface of the fixing rod 2, and one end of the supporting screw 6 passes through the two limiting screws 5, so that the limiting screw 5 is connected with the supporting screw 6, thereby increasing the stability of the limiting screw 5 and the supporting screw 6.

[0030] Working principle: When in use, the nail body 1 is replaced according to the length of the user's femur, and the positioning pressure rod 301 is pressed so that the positioning pressure rod 301 applies pressure to the positioning spring 305 to cause deformation, so that the contraction of the positioning pressure rod 301 facilitates the positioning sleeve 302 to be sleeved on the inner wall of the nail body 1, and the positioning sleeve 302 is moved to make the positioning pressure rod 301 embedded in the positioning hole 101, and the nail head 3 is connected to the nail body 1. After the above process, the fixing rod 2 at the other end can also be connected to the nail body 1 through the fixing structure 201, and then two limit screws 5 are embedded in the surface of the fixing rod 2, and then the support screw 6 is used to be embedded in the surface of the fixing rod 2, and one end of the support screw 6 passes through the two limit screws 5.

[0031] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A locking intramedullary nail for femoral fracture reduction, comprising a nail body (1), characterized in that: A fixing rod (2) is provided at one end of the nail body (1), a nail head (3) is provided at one end of the nail body (1), a positioning screw (4) is adapted to be provided on the surface of the nail head (3), a limiting screw (5) is adapted to be provided on the surface of the fixing rod (2), and a supporting screw (6) is adapted to be provided on the surface of the fixing rod (2).

2. The interlocking intramedullary nail for femoral fracture reduction according to claim 1, characterized in that: Positioning holes (101) are symmetrically provided at both ends of the nail body (1).

3. The interlocking intramedullary nail for femoral fracture reduction according to claim 2, characterized in that: A fixing structure (201) is provided at one end of the fixing rod (2).

4. The interlocking intramedullary nail for femoral fracture reduction according to claim 3, characterized in that: A positioning sleeve (302) is provided at one end of the nail head (3), a positioning plate (303) is fixedly provided on the inner wall of the positioning sleeve (302), positioning rings (304) are fixedly provided on both sides of the positioning plate (303), a positioning spring (305) is adapted on the surface of the positioning ring (304), a positioning pressure rod (301) is fixedly provided at one end of the positioning spring (305), and the positioning pressure rod (301) is adapted to the positioning hole (101).

5. The interlocking intramedullary nail for femoral fracture reduction according to claim 4, characterized in that: There are two positioning screws (4) in total, and the positioning screws (4) are evenly installed on the surface of the nail head (3).

6. The interlocking intramedullary nail for femoral fracture reduction according to claim 5, characterized in that: The limiting screw (5) is adapted to the supporting screw (6) and is adapted to be mounted on the surface of the fixing rod (2).

7. The interlocking intramedullary nail for femoral fracture reduction according to claim 6, characterized in that: The nail body (1) is arc-shaped and has a certain angle.

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