摘要
目的 探讨鼓膜冲击场对内耳有无保护作用。方法 豚鼠分别给予不同强度正压冲击波和负压冲击波，震后８小时和４８小时分别观察内耳损伤，并用脑干电反应仪检测动物的听反应域变化。结果 正压和负压都可造成中耳损伤，负压伤组动物鼓膜穿孔比未穿孔组听反应阈比较有差异，正压伤组动物鼓膜穿孔比未穿孔组听反应阈比较无差异。结论 负压伤造成的鼓膜穿孔对内耳起一定的保护作用，正压伤鼓膜穿孔对内耳无保护作用。
Objective To explore the protect effects of tympanic membrane rupture on the inner ear after blast exposure. Methods Guinea pigs were divided into different blast groups(3 positive pressure blast groups, 3 negative pressure blast groups) and one group as control group. The damage of middle ears were examined, and the brain stem response thresholds were measured 8 h and 48h after blast explosion. Results Both positive and negative pressure can cause the damage of middle ear. There is a difference of AIBR thresholds between intact or ruptured tympanic membrane. Conclusion Tympanic membrane ruptured animals by negative pressure may play some protect effects on inner ear.
出处
《听力学及言语疾病杂志》
CAS
CSCD
2002年第1期38-39,共2页
Journal of Audiology and Speech Pathology
