目的 针对传统外固定器存在的问题，发明一种新型的单肩气囊外固定器，分析评价该新型单肩气囊外固定器所产生的复位拉伸力。方法 建立人体锁骨的三维有限元模型，对单肩气囊外固定器的加载状况及所产生的复位拉伸力进行全面系统分析，并与传统“8”字绷带外固定器的情况进行对比分析。同时，通过观察实验，对比分析单肩气囊外固定器和传统“8”字绷带外固定器的实际加载情况。结果 单肩气囊外固定器所产生的复位拉伸力比传统外固定器更均匀而且较大，并可由患者自己调节。结论 单肩气囊外固定器对人体肩部的作用力及加载方式更加利于锁骨骨折的拉伸复位和维持锁骨骨折复位位置，而且使得锁骨骨折患者更加舒适。

Objective In view of the problems existing in traditional external fixator, to invent a novel single shoulder airbag external fixator, and evaluate the reductional stretch force produced by it. Methods The three-dimensional finite element model of human clavicle was established. The loading conditions of the single shoulder airbag external fixator and the reductional stretch force produced by the external fixator were analyzed comprehensively and systematically. The actual loading conditions of the single shoulder airbag external fixator and the traditional eight-figure bandage external fixator were compared and analyzed by experiment. Results Reductional stretch force produced by the single shoulder airbag external fixator was more uniform and larger than that produced by traditional external fixator, and could be adjusted by the patient himself. Conclusions The force and the loading method of the single shoulder airbag external fixator on the shoulder were more favorable for the stretched reduction of clavicle fractures and maintaining the position of clavicle fractures, and it could make the patients with clavicle fractures more comfortable.

国家自然科学基金项目(51365006)， 广西科学研究与技术开发技术项目课题（桂科攻0632007-2E）