Tool used for preparing screw channels for pelvis crista iliaca external fixator

Abstract

The invention relates to a tool used for preparing screw channels for a pelvis crista iliaca external fixator. The tool used for preparing the screw channels for the pelvis crista iliaca external fixator comprises a hollow sleeve I, a hollow sleeve II, a hand cone and a detecting rod, wherein sawteeth contacted with the surface of crista iliaca is arranged at the lower end of the hollow sleeve I, the hollow sleeve I sleeves the hollow sleeve II, spines penetrating sclerotin of the crista iliaca are arranged at the lower end of the hollow sleeve II, the hand cone is inserted into the hollow sleeve II, the sharp point of the hand cone extends out from the lower end of the hollow sleeve II to puncture bone cortex of the crista iliaca and then penetrate cancellous bone, so that openings of screw channels are formed, a blunt end tip is arranged at the lower end of the detecting rod, the openings of the screw channels are inserted into the deep part of iliac cancellous bone, and after the screw channels are formed, the spines at the lower end of the hollow sleeve II are knocked into crista iliaca sclerotin at the periphery of the screw channels and can be used for maintaining the directions of the screw channels. The tool used for preparing the screw channels for the pelvis crista iliaca external fixator integrates opening, positioning, forming and direction maintaining of the screw channels into a whole, the screw channels for the pelvis crista iliaca external fixator are simoly and conveniently prepared, and radiation exposure on a patient and persons in a surgery group is reduced.

Description

technical field [0001] The invention belongs to the field of minimally invasive surgery for pelvic injuries in trauma orthopedics, in particular to a channel preparation tool for pelvic external fixator screws inserted percutaneously from the iliac crest. Background technique [0002] Pelvic external fixation occupies a certain position in the treatment of pelvic injuries. Its indications include: first aid for biomechanically and hemodynamically unstable pelvic trauma to help reduce pelvic volume, self-packing and resuscitative treatment, etc.; for ultimate treatment of OTA-61B fractures; for OTA-61C Enhancement of internal fixation for fractures. At present, there are two main forms of pelvic external fixation: one is the external fixation frame with screws inserted through the anterior inferior iliac spine (AIIS), referred to as AIIS external fixation frame; the other is the external fixation frame through the iliac crest (iliac crest). , IC) into the external fixator w...

AI Technical Summary

Problems solved by technology

[0006] At present, the operation of percutaneous minimally invasive nail placement technology is purely manual operation, and there are no exclusive instruments and tools for opening, fixing, establishing and maintaining the channel of the external fixator screw

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