Unilateral three-dimensional external fixator

Abstract

The invention provides a unilateral three-dimensional external fixator which comprises connecting rods, short fixing rods, fixing bolts, traction nails and clamping blocks. The traction nails are fixed to the short fixing rods. The connecting rods are sleeved with the clamping blocks. The short fixing rods are fixed to the clamping blocks. The clamping blocks are fixed to the connecting rods through the fixing bolts. Self locking of the short fixing rods and the traction nails is achieved in a threaded mode. The unilateral three-dimensional external fixator is provided with a small number of components and is simple in structure, easy to assemble and capable of conducting fixation easily. Since the combined clamping blocks are selected, the fixing positions and the number of the clamping blocks can be selected according to fracture types, and true three-dimensional fixation can be realized through the clamping blocks and the short fixing rods with different lengths and different radians. The unilateral three-dimensional external fixator is light and attractive in overall design and capable of being used by a patient conveniently and facilitating self nursing.

Description

technical field [0001] The invention relates to a medical device, in particular to a unilateral three-dimensional external fixator. Background technique [0002] Since the beginning of this century, the bone penetrating needle fixation has been used to treat fractures. In the following decades of development, an external fixator composed of fixation pins, fixation clips and large rods has been formed. It has been continuously improved and its application has become more and more extensive. It is reflected in : 1. Fixing needle: Apply stainless steel threaded needle. 2. The flexibility of the external fixator: The external fixator that can only be adjusted on a single plane forms multiple planes through the universal joint sliding rod, which can perform functions such as fracture reduction, traction, and compression. 3. Improve the stability of the holder. Before the 1970s, people generally used bilateral external fixators. It was believed that the mechanical stability of t...

AI Technical Summary

Problems solved by technology

Before the 1970s, people generally used bilateral external fixators. It was believed that the mechanical stability of this kind of external fixator was stronger than that of unilateral fixator. With an in-depth understanding of the relationship between mechanical stability and fracture healing, the current trend is to use unilateral external fixators that do not penetrate both sides of the limb, are sufficient but not absolutely firm and stable

[0004] 1. The range of motion is limited, and the position far away from the fixed rod cannot be fixed, and the real three-dimensional fixation cannot be realized;

[0005] 2. There are too many joints, the degree of deformation caused by force after fixation is large, and the fixation strength is weak;

[0006] 3. Intraoperative operation is cumbersome, resulting in prolonged operation time;

[0007] 4. The exposed part of the fixation needle is unsightly, which affects the patient's dressing and daily activities

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