External fixation device for closed treatment of metacarpal fractures
For the treatment of closed metacarpal fractures bones designed external fixation devices, which allow closed reduction and fixation of fracture frafments. But rather complicated structure and large size limit their use.
Objective: to present external fixation device and treatment technology of closed displaced metacarpal fracture.
Methods: treatment with the proposed external fixation device conducted in 21 patients (2 women and 19 men, age 15 to 46 years) with closed displaced metacarpal fractures. II metacarpal bone fracture was found in 4 patients, IV — 9, V — 7, while IV–V — in 1. All patients previously underwent unsuccessful attempts of closed reposition.
Results: the apparatus consists of a basic and mobile pin-holders, threaded distractor and two connecting rods. Reduction device is a separate pin-holder with holes for directing and rods, clamping screws, penetrating smooth cylindrical hole in which freely passes distractor. After 2 holes in the base of pin-holder the proximal metacarpal bone fragment inserted two threaded rod and the proximal phalanx through hole of reduction pin-holder — usually one. To carry out distraction by 2–3 mm per day. Due to ligamentotaxis fracture is selfreduced. If the reduction achieved, the 2–3 hole in a moving pin-lock distractor of distal metacarpal bone administered 2–3 pins perform moderate compression and radiological control. In 14 cases achieved anatomic reposition of fragments. In 6 patients observed acceptable position. All patients in terms of fractures healed 3–5 weeks.
Conclusions: the proposed external fixation device allows closed reduction and fractures fixation of metacarpal bone of any kind of displacement.
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