Anti-seizure deformity correction external fixator

Abstract

The invention provides an anti-seizure deformity correction external fixator. The fixator has 6 degrees of freedom and mainly consists of a proximal ring, a distal ring, 6 length adjustable branches,an adjustment knob, a sliding self-locking needle clip, T-ring grooves and a kirschner wire. The deformed bone is fixed on a fixing ring of the fixator by the kirschner wire, the T-ring grooves are formed in the proximal ring and the distal ring, and the self-locking needle clip can slide in the grooves. The posture of a moving platform can be changed by adjusting the length of a branch chain andlocking some moving pairs to achieve correction of three-dimensional deformity such as angle, misalignment, rotation or separation. Three ball joints on each branch chain can achieve separate locking,can effectively solve the problems of interference and seizure during the correction process, and achieve correction of all rotation and displacement deformities. The sliding self-locking needle clipcan effectively prevent complications like needle infection, a frame and a support rod are not required to be changed in the correction process, the fixing is reliable, and the fixator is convenientto use.

Description

Technical field [0001] The invention relates to an orthopedic parallel bone external fixator, in particular to a parallel tibia deformity correction bone external fixator used for fracture reduction and bone deformity correction. Background technique [0002] With the continuous development of science and technology, modern transportation vehicles and building construction bring convenience to people's lives, but also bring potential dangers to our lives. More and more sudden accidents cause different degrees of orthopedics. Trauma, as well as congenital orthopedic diseases and limb deformities, seriously affect people's health and life. The external fixator is widely used in orthopedics. It is a minimally invasive tool for reduction, fixation, and correction of limb deformities. It is less traumatic and has a wide range of indications. It provides stable and flexible during the process of limb fracture reduction and deformity correction. fixed. Due to the small tissue trauma, ...

AI Technical Summary

Problems solved by technology

However, the existing external fixators have problems such as single structure, low adjustment accuracy, small working space, interference between branch chains, and singular position type in the correction process.

[0003] At the same time, the pre-tightening force of the Kirschner wire will affect the stiffness of the external fixator, and maintaining constant tension is very important during bone healing. The standard fixation method has the disadvantages of slipping of the Kirschner wire and insufficient pre-tightening force, which is very prone to failure. Complications such as needle tract infection

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