Facet joint retractor

Abstract

The invention relates to a facet joint retractor, which is formed by hinging two tong arms a hinge pin. The facet joint retractor is characterized in that one sides of front ends of the two tong arms are respectively provided with a cantilever; each cantilever is provided with a kirschner wire hole; inner sides of rear parts of the two tong arms are respectively provided with a spring piece; free ends of the two spring pieces are mutually engaged; the tail end of one of two tong arms is connected with a trapezoidal lock by a lock pin. When the facet joint retractor provided by the invention is used, firstly, two kirschner wires respectively penetrate skeletons which correspond to a facet joint, so that the two kirschner wires are parallel. Then, the two kirschner wires are respectively led into the kirschner wire holes arranged in the cantilevers to oppositely squeeze the rear parts of the two tong arms, so that the two cantilevers are mutually separated, and therefore, the facet joint is retracted to form a joint space, and the joint retracted state is locked and kept by the trapezoidal lock. The facet joint retractor provided by the invention has the advantages that the structure is simple, manufacturing is convenient, the use is convenient, a retracting effect is stable, an operating field is clear, operation techniques are convenient, and the operation time is reduced.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a small joint retractor. Background technique [0002] Clinically, when the small joints of the ankle or hand are fused or the reduction and fixation of intra-articular fractures are performed, it is often necessary to retract the joints to expose the joint space so as to operate directly on the articular surface. At present, the commonly used methods of facet joint retraction fall into two categories. One is the assistant's free-hand retraction method, which requires 1-2 assistants to resist traction. This method is not effective in retracting the joint space, which is prone to assistant fatigue and affects the operator's operation; the other is to use a cone-plate retractor. For retraction, the cone-plate retractor needs to be inserted into the joint space for retraction. It is found in clinical application that after retraction, the observation and operation of th...

AI Technical Summary

Problems solved by technology

One is the assistant's free-hand retraction method, which requires 1-2 assistants to resist traction. This method is not effective in retracting the joint space, which is prone to assistant fatigue and affects the operator's operation; the other is to use a cone-plate retractor. For retraction, the cone-plate retractor needs to be inserted into the joint space for retraction. It is found in clinical application that after retraction, the observation and operation of the articular surface will be affected by the surgeon, and it will occupy the surgical field and affect the operation.

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