Distal locking nail sighting device for interlocking intramedullary nail

Abstract

The invention discloses a distal locking nail sighting device for interlocking intramedullary nail, which comprises a bottom plate, positioning adsorption mechanisms are fixedly arranged on the two sides of the bottom plate correspondingly, supporting columns are fixedly arranged at the four corners of the top of the bottom plate correspondingly, the tops of the supporting columns are fixedly connected with a top block, a through hole is formed in the top of the top block, a sliding rod is inserted into the through hole and the sliding rod can slidably move up and down in the through hole; a first transverse rod is fixedly arranged on one side of the lower end of the sliding rod, a sighting device body is fixedly arranged on the other end of the first transverse rod, the sighting device body is fixedly sleeved with two frame bodies, the two frame bodies are fixedly connected through a connecting block, a telescopic column is fixedly arranged at the bottom of the frame body located on the inner side, and the telescopic column is fixedly arranged at the top of the bottom plate; a telescopic column is arranged on the outer side of the other frame body, and the telescopic column is sleeved on the outer side of the sighting device. According to the invention, the problem that an interlocking nail is not locked accurately due to the fact that the sighting rod does not certainly abut against a platform during operation and tends to deviate inwards sometimes and tends to deviate outwards sometimes is solved.

Description

technical field [0001] The invention relates to the technical field of sights, in particular to a locking nail sight at the distal end of an interlocking intramedullary nail. Background technique [0002] The intramedullary nail is an orthopedic internal fixation device in the medical equipment. It is the first choice for internal fixation of femoral shaft fractures. Compared with the plate, it has unique advantages. When using it, in order to prevent the two parts of the fracture from rotating, it is necessary to use two screws to transversely pass through the femoral shaft and the intramedullary nail for locking. Before the inner nail is inserted into the bone marrow cavity, a drill guide is used to combine with the intramedullary nail. In theory, the guide hole of the guide is facing the locking screw hole of the intramedullary nail, so that the drill bit can pass through the guide hole and drill directly to the locking screw hole. However, after the intramedullary nail ...

AI Technical Summary

Problems solved by technology

[0002] The intramedullary nail is an orthopedic internal fixation device in the medical equipment. It is the first choice for internal fixation of femoral shaft fractures. Compared with the plate, it has unique advantages. When using it, in order to prevent the two parts of the fracture from rotating, it is necessary to use two screws to transversely pass through the femoral shaft and the intramedullary nail for locking. Before the inner nail is inserted into the bone marrow cavity, a drill guide is used to combine with the intramedullary nail. In theory, the guide hole of the guide is facing the locking screw hole of the intramedullary nail, so that the drill bit can pass through the guide hole and drill directly to the locking screw hole. However, because the intramedullary nail is often deformed by the curvature of the femur after being inserted into the bone marrow cavity, the drill bit cannot be aligned with the locking screw hole in actual application, resulting in difficulty in locking the nail.

[0003] Before driving the distal interlocking nail, it is necessary to use the aiming rod to pass through the aiming arm and touch the platform at the distal end of the intramedullary nail to ensure the locking accuracy of the distal interlocking nail, but the aiming rod does not necessarily When reaching the platform, sometimes it will be inward and sometimes outward, resulting in inaccurate locking of interlocking nails. Therefore, the present invention proposes a distal locking nail sight for interlocking intramedullary nails to solve the above problems

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