恒河猴坐姿着陆冲击内耳损伤的观察

Observation of Inner Ear Injury after Landing Impact in Sitting Position in Rhesus Monkeys.

为研究机体及各组织器官对冲击力的耐受限值，探讨致伤原因及提出防护措施，利用着陆冲击塔，使实验动物恒河猴在坐姿状态下，进行冲击试验，试验后１ｈ左右处死，作大体解剖观察并取心、肝、脾、肺、颞骨等组织，固定、切片、镜检。同时重点观察了内耳的损伤。结果表明，冲击载荷不大（平台过载值为≤２５Ｇ）时内脏虽然有轻度损伤，但内耳可避免受损，当冲击力加大到一定程度（平台过载值为３０～３５Ｇ）导致内脏中等损伤时，内耳也有相应损伤，如囊斑耳石脱落、壶腹嵴上皮剥离等。

Tolerance limits of different tissues to landing impact were studied by doing experiment in Rhesus monkeys.10 Rhesus monkeys were divided into three groups, each suffered a different landing load. The monkeys were killed 1h after the experiment,and heart, liver, spleen,lung, and temporal bone were fixed, sliced, and then observed under microscope. Injuries of inner-ear were also observed. The results showed that when acceleration measured at the impact platform was less than 25G,only slight injuries were found in the various organs and no injury was found in the inner ear;when platform acceleration was 25～35G intermediate injuries were found in the various internal organs,and slight injury was found in the inner ear, such as detachment of otolith from macula of saccule and separation of epithelium in the ampulla.