【摘要】 目的　探讨成人创伤性桡骨头脱位的机制。方法　对成人尸体肘关节标本进行了动态模拟冲击试验和扭转试验。结果　 7侧冲击试验的标本中 ,在轻度屈肘、前臂旋转位有 4侧发生脱位或半脱位。 6侧扭转试验的标本 ,在旋转超过正常范围时 ,有 4侧发生了脱位或半脱位。 5例临床病例 ,3例发生于跌倒、前臂轻度旋前位 ;2例发生于极度旋转位。结论　孤立性桡骨头脱位在前臂轻度旋前、屈肘位 ,桡骨头受到轴向冲击力或前臂在极度旋转位 ,桡骨头受到扭转暴力时最容易发生。更多还原

【Abstract】 Objective To determine the mechanism of isolated traumatic dislocation of the radial head in adults. Methods The simulated dynamic test on the elbows of adult cadarver specimen was performed by the punch and the rotation. Results In seven elbows punched with slight elbow flexion and forearm pronation, dislocation or semidislocation of the radial head occured in four. In six elbows rotated beyond the normal range, the same results appeared in four elbows. Clinically five patients suffered from dislocation, had a fall onto the ground with minor pronation in three and extreme rotation in two. Conclusion Isolated dislocation of the radial head occurs most commonly with a axial punch injury associated with slight elbow flexion and forearm pronation or extreme rotation.更多还原