Hinge type dragging external fixing device

Abstract

The invention discloses a hinge type dragging external fixing device which comprises two parallel screws, a rotating central pin, a maintaining reset pin, a fixing dragging pin and nuts. Sliding grooves are arranged along the axial direction of the screws, and installing through holes are arranged at the bottoms of the screws. Two ends of the rotating central pin are inserted in the installing through holes of the screws respectively, and the rotating central pin penetrates through the center of a lateral side of a near finger joint bone. Two ends of the maintaining reset pin are inserted in the sliding grooves respectively, and the maintaining reset pin transversely penetrates through the center of a lateral side of a near end of a middle finger joint bone. Two ends of the fixing dragging pin are inserted in the sliding grooves of the two screws respectively, and the fixing dragging pin transversely penetrates through the center of the lateral side of a far end of the middle finger joint bone. The nuts are matched with threads of the screws and used for limiting positions of the fixing dragging pin and the maintaining reset pin respectively. The hinge type dragging external fixing device can maintain centrality reset of joints and prevent the joints from dislocating again. By means of the device, functional training can be conducted early, and active stretching movement of the joints can be conducted on the same day after operation so as to be favorable for fast healing of joint articular cartilages and fast recovery of joint functions. The device is light in appearance, easy to operate and easy in clinical popularization.

Description

technical field [0001] The invention relates to the technical field of medical instruments, and more specifically relates to a hinged traction external fixation device. Background technique [0002] At present, the proximal interphalangeal joint fracture or fracture with dislocation of the finger is difficult to treat. Traditional internal fixation devices such as Kirschner wires and plate screws cannot achieve anatomical reduction and strong internal fixation for excessively comminuted fractures, and early mobilization after surgery is not possible. , poor curative effect. Miniature external fixators can maintain joint reduction while maintaining normal joint space, but they cannot exercise early function, and the effect is not good. [0003] Therefore, how to carry out joint active activities while maintaining joint and fracture reduction and stability has become a technical problem to be solved urgently by those skilled in the art. Contents of the invention [0004] I...

AI Technical Summary

Problems solved by technology

[0002] At present, the proximal interphalangeal joint fracture or fracture with dislocation is difficult to treat. Traditional internal fixation devices such as Kirschner wires and steel plate screws cannot achieve anatomical reduction and strong internal fixation for excessively comminuted fractures, and early mobilization after surgery is not possible. , poor efficacy

The miniature external fixator can maintain joint reduction while maintaining normal joint space, but it cannot exercise early function, and the effect is not good

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