External thoracolumbar vertebra distraction repositor

Abstract

The invention discloses an external thoracolumbar vertebra distraction repositor which comprises a fixed support, two hollow screws, a distracter, a pressurizer and a T-shaped socket spanner; the fixed support comprises a beam and two sets of clamps; the distracter comprises a body and two distraction rods, and one end of the distraction rod is provided with a C-shaped foot hook which is vertical to the distraction rod; the pressurizer comprises a thread rod, a connector and an extension rod; the connector comprises a nut which is connected with the thread rod and a lantern ring which is sleeved on the extension rod, and the lantern ring and the extension rod as well as the lantern ring and the nut are respectively connected with each other rotatably in two intersected planes. The distraction repository can spread the vertebral body to the maximum height according to the practical conditions, and through utilizing the self restrictive tensile forces of the anterior and the posterior longitudinal ligaments of the vertebral body, the vertebral body can be effectively corrected to be backwards protruded for an angle of 2-8 degrees; and moreover, the heights of the anterior, the center and the posteriors can also be effectively reposed. In addition, the distraction repository is also suitable for spreading, restoring and reposing the burst fractures without symptoms of stressed spinal cord and neurological deficit when vertebral body paries posterior fracture is burst in the spinal canal.

Description

technical field [0001] The invention relates to an external fixation device for spinal surgery, in particular to a minimally invasive thoracic and lumbar vertebrae external fixator for the spine. Background technique [0002] With the aging of society, the incidence of fractures caused by osteoporosis is increasing year by year. According to the NIH research of the National Institute of Health, there are about 1.5 million such fractures in the United States every year, of which spinal fractures account for 30%. [0003] The incidence of thoracolumbar compression fractures, including osteoporotic compression fractures in the elderly, is increasing day by day. According to epidemiological studies, the incidence of spinal fractures in Beijing women over 50 years old is 15%, and the incidence after 80 years old is 37%. The development of population aging has led to an increase in the incidence of osteoporotic fractures in the elderly, including some pathological fractures from ...

AI Technical Summary

Problems solved by technology

[0006] (1) Although the middle column of the vertebral body can be stretched to restore a certain height, the height of the front and rear columns cannot be effectively stretched;

[0007] (2) It cannot effectively solve the problem of kyphotic angulation of the vertebral body;

Prognosis leads to stress transfer in adjacent upper and lower vertebral bodies, resulting in accelerated degeneration of adjacent upper and lower intervertebral discs

For osteoporotic compression fractures, due to the presence of osteoporosis in patients, this decompression and fixation operation will cause more bleeding, and the fixation will be more unreliable. Therefore, better treatment equipment is urgently needed

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