A distractor for atlantoaxial dislocation and distraction reduction

Abstract

The invention relates to the technical field of medical devices, in particular to a spreader used for distraction reduction of atlantoaxial dislocation. In this kind of spreader for atlantoaxial dislocation, the drive mechanism is used to control the reverse movement of the first spreader and the second spreader to spread and move towards each other to close up. There is a first slideway extending along the length direction of the first brace, a first positioning hole is opened at the bottom of the first slideway, and a second slideway extending along the length direction of the second brace is opened on the second brace and a second positioning hole is opened at the bottom of the second slideway, and the first slideway and the second slideway are arranged in parallel and opposite to each other. The distractor for atlantoaxial dislocation and restoration of the present invention ensures the distance between the corresponding vertebral bodies through the driving mechanism during the distraction process, and releases both hands after the distraction, avoiding misoperation; the fixation of the titanium rod During the process, the two ends are respectively restricted, and will not move or tilt, which effectively saves operation time and operation difficulty.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a spreader used for distraction reduction of atlantoaxial dislocation. Background technique [0002] At present, the key technology of the operation for the treatment of atlantoaxial dislocation lies in sufficient decompression of the compressed spinal cord and reliable internal fixation, and the success of distraction reduction directly affects the recovery of patients' postoperative symptoms. Therefore, distraction reduction is also the key to the success of the operation. [0003] The spine is composed of multiple intervertebral discs and vertebral bodies that are staggered up and down. When a certain intervertebral disc is damaged, it is necessary to connect the corresponding vertebral body through a titanium rod, that is, a spinal screw rod operation, to support the person's weight. The titanium rod is screwed into the corresponding vertebral body through a screw. i...

AI Technical Summary

Problems solved by technology

However, the spreader for this kind of spinal screw-rod surgery has the following problems. First, the spreader is easy to slip off from the titanium rod during the process of spreading and resetting, which increases the risk of operation and even causes irreversible consequences to the patient; One is that it is impossible to maintain the stretched state continuously during the operation, and it is not convenient to tighten the nut after stretching; the third is that the stretching direction of the spreader is inclined, and the force direction is uneven, and the stretching process is laborious

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