An anti-stuck external fixator for deformity correction

Abstract

The present invention provides an anti-jamming deformity correction bone external fixator, which has 6 degrees of freedom in total, and mainly consists of a proximal ring, a distal ring, 6 branch chains with adjustable length, an adjustment knob, Composed of locking needle clamp, T-shaped annular groove and Kirschner wire. The deformed bone is fixed on the fixation ring of the fixer through Kirschner wires, T-shaped ring grooves are respectively arranged on the proximal ring and the distal ring, and the self-locking needle clip can slide in the grooves. By adjusting the length of the branch chain and locking some kinematic pairs, the pose of the moving platform can be changed, and three-dimensional deformities such as angle, dislocation, rotation or separation can be corrected. The three spherical hinges on each branch chain of the present invention can realize independent locking, which can effectively avoid problems such as interference and jamming in the correction process, and realize correction of all rotation and displacement deformities, and the sliding self-locking needle clamp is effective To prevent complications such as needle tract infection, the correction process does not need to change the frame and support rods, and the fixation is reliable and easy to use.

Description

technical field [0001] The present invention relates to an orthopedic parallel external bone fixator, in particular to a parallel tibial deformity correction external bone fixator for fracture reduction and bone deformity correction. Background technique [0002] With the continuous development of science and technology, modern traffic vehicles and building construction, etc. bring convenience to people's life, but also bring potential danger to our life. More and more sudden accidents cause different degrees of orthopedic Trauma, as well as congenital orthopedic diseases and limb deformities, seriously affect people's health and life. External fixator is widely used in orthopedic surgery. It is a micro-invasive tool for reduction, fixation and correction of limb deformities. It has small trauma and wide indications. fixed. Due to less tissue trauma, less blood loss, and fewer metal implants in the wound, hardware-related infections can be avoided. Its indications mainly i...

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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