Minimally invasive thoracolumbar posterior screw rod structure convenient to adjust

Abstract

The invention discloses a minimally invasive thoracolumbar posterior screw rod structure convenient to adjust. The structure comprises a main rod, a first mounting bolt is arranged in the left end ofthe main rod in a penetrating manner, a mounting hole is formed in the left end of an upper positioning block, a breaking block is fixedly connected with the surface of the left end of the upper positioning block, a first vertebral arch hook piece and a second vertebral arch hook piece are mounted on the outer surface of the left side of the main rod, a first pedicle screw is mounted on the outersurface of the middle of the main rod, and the inside of the front end of the first pedicle screw is connected with a third positioning nut through threads. The minimally invasive thoracolumbar posterior screw rod structure convenient to adjust requires no incision for exposure of paraspinal muscle during percutaneous placement of the pedicle screw, cannot damage nerves and blood vessels during placement of a guide needle and is applicable to a thoracolumbar fracture posterior minimal invasion system and patients with posterior longitudinal ligament problems, the insertion depth of the main rod can be controlled by inserting the positioning structure, the length of the main rod is adjustable, and repair length or position of postcentrum is relatively flexible.

Description

technical field [0001] The invention relates to the related technical field of orthopedic medical devices, in particular to a conveniently adjustable minimally invasive posterior thoracolumbar screw-rod structure. Background technique [0002] The work intensity of modern people is increasing day by day. Staff in some fields need to work overtime frequently, which leads to more and more people prone to spine problems, so it puts a certain pressure on the field of medical orthopedics. People try their best to treat orthopedic patients. Treatment and research on such conditions have improved both in terms of medicine and auxiliary equipment, and have promoted the development of the field of medical orthopedics. The internal fixation structure for thoracolumbar fractures is an Closed reduction and internal fixation equipment for fractures with intact longitudinal ligaments and unstable fractures, for the application of this equipment, greatly helps to reduce the trauma of surge...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a conveniently adjustable minimally invasive posterior thoracolumbar screw-rod structure to solve the problem of percutaneous insertion of pedicle screws in the above-mentioned background technology, which requires an incision to expose the paravertebral muscles. When the upper articular protrusion and transverse process of the adjacent vertebral bodies meet and the guide pin is inserted, it is easy to damage the nerves and blood vessels; it is only suitable for the posterior minimally invasive system for thoracolumbar fractures, not for patients with problems with the posterior longitudinal ligament; there is no insertion positioning structure, the insertion depth of the main rod cannot be controlled, and the radian design of the main rod is not reasonable enough; the length of the main rod is relatively fixed, and the repair length or position of the posterior vertebral body is relatively fixed.

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