Spinal deformity correcting instrument

Abstract

A spinal deformity correcting instrument is made of shape memory alloy capable of being implanted into the spinal column of a human body, and comprises a hook, universal heads and longitudinal bars. The universal heads and the hook are integrated, the universal heads on two sides of the hook are respectively arranged on a left shoulder and a right shoulder of the hook and are hollow cylinders, U-shaped grooves are arranged on the cylinders, and threads are arranged on inner side surfaces of the U-shaped grooves; the longitudinal bars are solid cylinders and are fixedly placed in the U-shaped grooves of the universal heads, and diameters of the longitudinal bars are matched with sizes of the U-shaped grooves arranged on the universal heads; and the hook is arched, bent hooks are arranged at two ends of the hook, and a longitudinal groove is arranged on the arched top of the hook. During usage, a doctor can operate the spinal deformity correcting instrument on a transverse process or vertebral plate without implanting a pedicle screw into the human body or opening the spinal canal of the human body, advantages of the bent hooks, the longitudinal bars and the universal heads which are made of the memory alloy can be sufficiently played, complicated surgical operation is simplified, surgical risks are greatly reduced, and the spinal deformity correcting instrument can be widely applied to various spinal deformity correcting surgeries and can be easily popularized in primary hospitals.

Description

technical field [0001] The invention relates to the field of medical instruments, in particular to a medical instrument for correcting spinal deformity made of memory alloy. Background technique [0002] Spinal deformity is a common and frequently-occurring disease. It is caused by a variety of reasons. It can be manifested as scoliosis, rotation, anterior or kyphotic deformity, stiffness, etc., and it can occur in all age groups, especially For children and teenagers, it not only affects the appearance, but more importantly, it is very easy to threaten the functions of the heart, lungs, and nervous system, seriously endangering people's physical and mental health. A significant proportion of patients require surgical correction of the deformity. [0003] At present, some correction devices for spinal deformity are also reported in the public literature. After searching, we extract as follows: [0004] 1. Chinese patent, title: a spinal pedicle internal fixation device. A...

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Problems solved by technology

[0009] The above-mentioned published documents can solve some problems of spinal deformities, but the disadvantages are that some of them have unsatisfactory correction effects, some have complicated structures, complicated operations, and are not practical, so there are not many real applications.

To sum up, it is a process of gradual improvement for the endlessly emerging corrective devices for spinal deformities from Hastelloy and Lus rods to the popular pedicle screw-rod system at home and abroad. However, the defects of the technology are obvious. The surgical operation of the patient is complicated, it needs to insert pedicle screw, often need to open the spinal canal, osteotomy orthopedic, high technical level and experience requirements, high surgical risk, easy to cause serious complications such as paraplegia, so it is difficult to popularize in primary hospitals use

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