A kind of reverse thread propulsion resetter

Abstract

The invention relates to a reverse thread retractor, which includes a screw adjusting module, a first retracting module, a second retracting module and a sliding rod. The screw adjusting module includes an adjusting knob, a screw, a right-hand thread and Left-handed thread, the left end surface of the adjustment knob is connected to the screw, the side of the screw adjacent to the adjustment knob is provided with a right-handed thread, the other side of the screw is provided with a left-handed thread, and the right-handed thread is threaded on the first A stretch reset module, the left-hand thread is threaded to connect the second stretch reset module, and the first stretch reset module and the through hole on the second stretch reset module are slidably connected to the sliding rod. The present invention has the advantages of convenient operation, Minimally invasive reduction, small incision, less exposure, less damage, fluoroscopy, good reduction and fixation effect, etc., the process of distraction reduction along the axis is stable, precise, controllable, safe and convenient to use, and can be used for various fractures. Distraction and reduction of fractures involving distal and proximal segments and joints.

Description

technical field [0001] The invention relates to a medical device, in particular to a reverse thread retractor. Background technique [0002] In the current fracture treatment, ordinary bone hooks are usually used for traction for open reduction of fractures. It is time-consuming, and during traction, the ordinary bone hook must bite the bone end to reset. This traction method further increases the pain of the patient, and there are also temporary fixers, which often need to be removed due to the placement of the bone plate , or the fracture is difficult to reset due to muscle contraction, and for open reduction and closed reduction, the existing devices have problems such as being unable to reset along the axis, unable to expand, and unable to maintain, which brings great trouble to normal fracture surgery , In addition, the retractors on the market have complicated structure, inconvenient operation, unstable reset process, low precision and difficult control. Contents of...

AI Technical Summary

Problems solved by technology

[0002] In the current fracture treatment, ordinary bone hooks are usually used for traction for open reduction of fractures. It is time-consuming, and during traction, the ordinary bone hook must bite the bone end to reset. This traction method further increases the pain of the patient, and there are also temporary fixers, which often need to be removed due to the placement of the bone plate , or the fracture is difficult to reset due to muscle contraction, and for open reduction and closed reduction, the existing devices have problems such as being unable to reset along the axis, unable to expand, and unable to maintain, which brings great trouble to normal fracture surgery , In addition, the retractors on the market have complex structures, inconvenient operation, unstable reset process, low accuracy, and difficult control

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