A retractable external fixation device for bone defect repair

Abstract

The invention relates to a retractable external fixation device for bone defect repair, which includes 4 retractable annular braces and a universal bone needle device. There are at least two universal spicule devices on a telescopic ring support; the telescopic ring support includes a first half ring and a second half ring, and the ends of the first half ring and the second half ring spread out the arm by sliding Connection; the universal bone needle device includes a fixed pin and a universal fixed nut, the universal fixed nut is installed on the telescopic ring support, and the fixed pin is installed on the universal fixed nut. The present invention can adjust the size of the retractable annular brace according to the size of the patient's limbs. The 2mm steel needle is more minimally invasive, and the local blood supply is less disturbed. It can provide more comfortable treatment experience and more choices for patients with bone defects who need limb reconstruction; Through multi-plane needle puncture, the fixation is reliable and the stress distribution is even. It can correct the angular deformity of the limbs while repairing the nonunion.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a retractable external fixation device for bone defect repair. Background technique [0002] External fixation brackets have become the first choice for corresponding orthopedic surgical treatment. Orthopedic fixation technology is to connect adjacent bone segments or limbs through percutaneous needles and external connectors, and achieve stable fixation after the basic anatomical reduction of the fracture end. It is a good orthopedic surgical treatment technique to provide the required biomechanical environment for fracture healing and to meet the functional recovery exercise needs of patients. This method is neither internal fixation nor external fixation, but it has the effect that internal fixation and external fixation could not achieve in the past. [0003] Existing external fixation brackets usually include bone needles and ring braces. The bone needles are mounte...

AI Technical Summary

Problems solved by technology

[0003] Existing external fixation brackets usually include bone needles and ring braces. The bone needles are mounted on the ring braces through universal fixing nuts, but the existing ring braces are usually of fixed diameter and cannot be adjusted according to the size of the patient's limbs. Afterwards, it usually causes great inconvenience to the patient's life and movement.

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