Growing rod applied to spinal correction

Abstract

The invention relates to a growing rod applied to spinal correction. The growing rod includes a first rod component, a second rod component and an expansion pressurizing sleeve linearly connected to the first rod component and the second rod component. A first inner threaded segment and a second inner threaded segment are arranged in inner cavities of the two ends of the expansion pressurizing sleeve respectively, and the rotation directions of the two inner threaded segments are opposite to each other. An outer threaded segment matched with the first inner threaded segment is arranged at oneend of the first rod component, and an outer threaded segment matched with the second inner threaded segment is arranged at one end of the second rod component. A torsion part is arranged on the portion, close to the middle, of the outer wall of the expansion pressurizing sleeve, and when the torsion part is twisted, the first rod component moves in the same direction or opposite direction relative to the second rod component. Thus, the convenience of surgery is improved. Additionally, through rotation of clockwise threads and counterclockwise threads, expansion operation can be achieved, andthe structure above is applied to the field of correction and growth of spines for the first time. Operators can figure out an expansion distance according to the number of turns of rotating the torsion part, precise control is achieved conveniently, and the expansion process is stable.

Description

technical field [0001] The invention relates to the technical field of orthopedic medical instruments and tools, in particular to a growth rod applied to spinal correction. Background technique [0002] During scoliosis correction surgery, growth rods are generally used to prevent the aggravation of the curvature of the spine and to promote the longitudinal growth of the trunk. At present, for the existing scoliosis surgery, especially when performing orthopedic, internal fixation and fusion surgery on the spine of adolescents and children, internal fixation devices are required to maintain the effect of surgical correction and increase the rate of spinal fusion. However, since adolescents and children have not yet fully grown in the spine, the growth rods need to be stretched periodically. The current method for extending the internal fixation rods of the spine is often to loosen the connectors of the growth rods (such as domino connectors), and simultaneously use instrume...

AI Technical Summary

Problems solved by technology

This expansion method requires other auxiliary equipment, and the expansion force depends entirely on the operator's hand feeling, the process is uncontrollable, which increases the risk of surgery

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