Vertebral arch pedicle extension device

Abstract

The invention discloses a vertebral arch pedicle extension device, which comprises a front nail, a core bar, a rear nail and a fixer. The core bar has a hollow structure, wherein the middle part of the core bar is provided with a through hole, the front end of the core bar is connected with the front nail by screw thread, the rear end of the core bar is sleeved with the rear nail, and the core bar is glidingly connected with the rear nail; the fixer is fixedly connected at the rear end of the rear nail and enables the core bar and the rear nail to be fixed oppositely. The vertebral arch pedicle extension device can separate a centrum from a vertebral arch pedicle and extend the distance therebetween, finally achieve the aims of expanding a vertebral canal and an intervertebral foramina and reducing pressure, can be applied to surgical operation on stenosis of the lumbar spine and has good application prospect.

Description

technical field [0001] The invention belongs to the field of lumbar spinal canal stenosis surgery, and in particular relates to a pedicle extension device. Background technique [0002] With the aggravation of population aging and the bad working and living habits of modern people, the incidence of lumbar spinal stenosis is increasing. Lumbar spinal stenosis refers to a series of clinical symptoms caused by bone hyperplasia or fibrous tissue hyperplasia caused by various reasons, hypertrophy leading to shortening of the sagittal diameter of the spinal canal or nerve root canal, stimulation and compression of nerve roots or cauda equina; Lumbar spinal stenosis can be uniplane (two adjacent vertebral bodies, intervertebral discs, facet joints, and supporting ligaments) or multiplane (involving two or more spaces). Its typical clinical manifestations are: bilateral neurogenic claudication, intermittent thigh or calf radiating pain, aggravated by prolonged standing, activity or...

AI Technical Summary

Problems solved by technology

[0005] However, in the above method, the appendages, ligaments and other tissues and structures on the posterior side of the spine are removed during the operation, which not only damages the spine and destroys its stability, but also easily damages the nerves. disease, so the operation trauma is large and the patient suffers a lot; at the same time, the operation is difficult and complicated, the operation time is long, and the cost is high

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