Universal phalanx and metacarpus annular external fixator

Abstract

The invention discloses a universal phalanx and metacarpus annular external fixator. The fixator comprises two fixator bodies and a rotating assembly, each fixator body comprises an arc body, two boneneedles and a universal head, each two bone needles are movably connected to the two ends of the corresponding arc body, the universal heads are arranged in the middles of the arc bodies, the two fixator bodies are connected with the two ends of the rotating assembly through the universal heads, and the two fixator bodies can relatively rotate. When the universal phalanx and metacarpus annular external fixator is clinically arranged, the fixator can move in a multi-degree-of-freedom mode through adjustment of the universal heads according to the actual fracture conditions so that the fixatorcan be matched with the different fracture conditions more easily, and the clinical installation requirement is met; and during postoperative rehabilitation exercise, the two fixator bodies can relatively rotate through adjustment of the rotating assembly according to medical advices so that two phalanges of different sections can rotate and bend along with the fixator bodies, the purpose of postoperative early-stage functional exercise is achieved, and the postoperative joint movement function recovery is facilitated.

Description

technical field [0001] The invention relates to the technical field of medical devices, in particular to a universal circular external fixator for metacarpal bones. Background technique [0002] Dislocation or fracture of the proximal interphalangeal joint due to trauma is a common type of hand fracture, and its injury mechanism is usually the result of direct violence or the joint action of proximal interphalangeal joint hyperextension and longitudinal load. The traditional treatment for this type of fracture is based on manual reduction and external fixation such as phalanx splint or plaster tray. However, this method has the disadvantages of inaccurate fixation of the fracture site, no effective compression of free fracture fragments, and it is easy to cause fracture after too long fixation time. The interphalangeal joints are more affected and so determined. Therefore, on this basis, the existing surgical techniques are improved, and the bones adjacent to the interphala...

Images