Vertebral segment distractor

Abstract

The invention provides a vertebral segment distractor, which comprises distracting screws and a locating device, wherein the locating device comprises a plurality of supporting rods; a distance between the supporting rods is adjustable; the plurality of distracting screws correspond to the plurality of supporting rods one by one; and the distracting screws can be connected to the supporting rods in an embedded mode. According to the vertebral segment distractor provided by the invention, with the adoption of a structure that the tails of the screws are perforated and the supporting rods, which are matched with the screws, are inserted into the screws, peripheral nervous tissues are protected from getting hurt in the case that the supporting rods, which are relatively large in cross section, are inserted into a human body once again after the screws are rightly placed in a surgical process.

Description

technical field [0001] The invention relates to a surgical medical device, in particular to a vertebral disc spacer. Background technique [0002] When people complete various tasks, they need to constantly change their positions to relieve the stress on the waist. However, with the change of social work and living habits, office workers stay in a certain position for a long time, which will lead to local cumulative damage, especially long-term bad posture. Posture is more likely to cause diseases such as disc herniation. When the condition is mild, non-invasive conservative treatment or minimally invasive interventional treatment with injury is selected. When such treatment is ineffective, surgical treatment is necessary. Lumbar fusion and artificial disc replacement are two relatively common methods, and high-strength distractors are required for fixed support during the operation. [0003] In the prior art, two screws are respectively fixed on the two vertebrae, and the...

AI Technical Summary

Problems solved by technology

However, the section of the expansion rod provided by this technology is larger than that of the screw. During the insertion process, the expansion rod may cause damage to the nerve tissue in the peripheral part of the operation, and it can slide freely along the axial direction of the screw, which affects the effect of fixation.

After the operation, it is necessary to remove the spreader and then unscrew the screw, which may cause damage to the surrounding tissue again

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