Sighting device for pelvis internal fixation

Abstract

The invention relates to a sighting device for pelvis internal fixation. The sighting device comprises a positioning part and a regulating mechanism. A guide through hole which allows a mark pin to penetrate through is formed in the positioning part. The regulating mechanism is provided with a longitudinal rotating assembly, a horizontal rotating assembly, a longitudinal translation assembly and a horizontal translation mechanism, the longitudinal rotating assembly rotates around the longitudinal axis to drive the positioning part to rotate around the longitudinal axis, the horizontal rotating assembly rotates around the horizontal axis to drive the positioning part to rotate around the horizontal axis, and the longitudinal translation assembly and the horizontal translation mechanism drive the positioning part to move longitudinally and horizontally respectively. The positioning part is detachably or fixedly connected with at least one of the four assemblies. The plane formed by the longitudinal direction and the horizontal direction is at included angle with the extension direction of the guide through hole. The sighting device can help a doctor to position the implantation target point of a hollow screw accurately under the condition that the radiation times are few.

Description

technical field [0001] The present invention relates to a surgical instrument, in particular to an aimer for internal fixation of the pelvis. Background technique [0002] Fracture surgery in orthopedics is generally divided into two processes, namely reduction process and fixation process. The reduction process refers to restoring the broken end of the affected side of the fracture (that is, the displaced part) to its original position. [0003] During the fixation process, you need to use the sight to find the needle insertion path that needs to be fixed. In addition, during the fixation process, due to the particularity of the pelvic bone shape, it is difficult to identify the projection images generated by standard frontal and lateral fluoroscopy. Therefore, the exit and entrance images are generally used to determine the positioning point. Among them, the tube was inclined 45° to the head when the pelvic inlet view was taken, and the tube was inclined 45° to the tail ...

AI Technical Summary

Problems solved by technology

However, the guide needs to use three-dimensional image CT, which is not available in general hospitals during surgery, and its popularity is not high; the device cannot be fixed, and it is difficult to register with CT data

[0007] In addition, in traditional pelvic fixation surgery, doctors and patients have to be exposed to X-ray radiation for a long time, resulting in greater radiation damage

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