Vertebra support ranging device

Abstract

The invention provides a vertebra support distance measuring device, which includes a probe rod and a resistance wire; the probe rod includes a rod body and a probe; the rod body is made of insulating material; the resistance wire and the probe are separated by the rod body; the probe rod includes a first The probe rod and the second probe rod; the resistance wire is passed between the first probe rod and the second probe rod. The invention adopts the principle of a sliding rheostat to measure the distance between the vertebra supports, and simultaneously uses an electronic display screen to directly read the distance value, which is simple and convenient.

Description

technical field [0001] The invention relates to the field of medical devices, in particular to a vertebra support ranging device. Background technique [0002] During the operation of spondylolisthesis, spinal fracture, spinal degenerative disease, and correction of spinal deformity, pedicle screws are usually used to connect to the vertebra, and then the spinal rod is connected to the pedicle screw to complete the support of the vertebra. During the operation, The distance between the pedicle screws must be measured first to determine the length of the spinal rod to be harvested. [0003] The patent document with the publication number CN 1550220A provides a distance measurer for pedicle screws, which has two arms crossed at the axis of rotation, the ends of which can be positioned between two vertebral arches screwed into adjacent vertebrae. At the first screw, the first arm merges on the opposite side of its end into a cross bar provided with an arcuate scale portion, th...

AI Technical Summary

Problems solved by technology

However, in actual use, especially in the support operation between two non-adjacent vertebrae, there may be inconsistencies in the extension direction and protr

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