摘要
豚鼠暴露于峰值为157或163dB SPL的两种脉冲噪声10发(1/min),测试阈值恢复情况30d,并进行鼓膜损伤和耳蜗组织化学检查。结果表明,157dB脉冲噪声产生与暴露后时间对数成线性关系的恢复类型,无永久性阈移。163dB脉冲噪声导致一种恢复-停顿-再恢复的阈移类型,第30d仍有13dB阈移残留。两组动物均未见鼓膜穿孔,但绝大多数耳蜗显示有外毛细胞丢失或琥珀酸脱氨酶(SDH)酶活性降低。
Guinea pigs were exposed to 10 impulses of either 157-or 163dB peak SPL.The threshold shift recovery was monitored for 30 d, and tympanometric changes and co-chlear hislochemistry were investigated.The results showed that the 157dB level produced a recovey pattern linear to post-exposure log time and no PTS was found.The 163dB level produced a recovery-stop-recovery pattern, showing 13dB threshold shift on the 30th day after exposure.There are no TM perforation in both groups but most of the cochleas showed loss of outer hair cells or reduced activity of succinic dehydrogenase (SDH).
出处
《第二军医大学学报》
CAS
CSCD
北大核心
1989年第5期459-462,共4页
Academic Journal of Second Military Medical University
关键词
爆震伤
脉冲噪声
阈移
毛细胞
explosive injury
impulse noise
threshold shift
hair cells
