儿童骨盆侧方撞击的实验研究(英文)

Experimental cadaveric study of lateral impact of the pelvis in children

目的研究儿童骨盆撞击的力学响应.方法12名2～12岁的儿童尸体由亲属捐赠用于该项实验测试,并分为两组,2～4岁(6例)为幼儿组,5～12岁(6例)为儿童组.撞击前分别进行CT扫描和X线检查,撞击后再次进行X线检查和尸检.除1例标本的撞击速度为9.1 m/s外,所有标本的撞击速度均为7.5±0.5 m/s.结果所有测试的时间和粘性标准(V*C)峰值曲线都非常接近,但幼儿组和儿童组的粘性标准峰值间有显著的统计学差异(P＜0.05),同时两组标本的刚度也存在显著的统计学差异(P＜0.05).撞击后检查标本未发现损伤.结论儿童骨盆对每组撞击试验的反应均有良好的重复性.

Objective To study the mechanic response of children's pelvis to later al impact. Methods Twelve 2-to12-year-old children's cadavers were donated b y their relatives for this impact test, dividing into younger group (2 to 4 year s old, n=6) and elder group (5 to 12 years old, n=6). CT scan and X-ray examina tion were performed before the impact test, and after the test, X-ray examinati on and autopsy were conducted. All the pelvises were impacted at a speed of 7.5 ±0.5 m/s but for one at 9.1 m/s. Results All tests showed similar behavior of the pelvis with similar timing and peak viscous criterion (V*C) values. Statist ical significance was noted in the maximum V*C and degree of stiffness of the pe lvis between the 2 groups (P<0.05). No injuries occurred in the 2 groups after t he impact. Conclusion The pelvic test yields very repeatable pelvic response am ong each group tested.