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强脉冲噪声暴露后,用耳蜗电图记录CAP和-SP,光镜观察耳蜗毛细胞损伤情况,图象分析法定量测定耳蜗血管纹血管的管腔面积及红血球分布。结果提示,爆震后即刻,耳蜗各圈毛细胞血管明显扩张、充血,爆震后4天恢复至正常范围,CAP阈移以4kHz、8kHz最大,与外毛细胞损伤主要位于1T、2T基本吻合,但与血管纹血管变化并不协调对应,似说明耳蜗微循环的改变与毛细胞的损伤无直接关系。
After exposure to strong impulsive noise, CAP and -SP were recorded with cochlear electrocardiography. The damage of cochlear hair cells was observed with light microscope. The luminal area and erythrocyte distribution of cochlear vascular pattern were quantitatively determined by image analysis. The results showed that immediately after detonation, the hair cells of the hair cells in each cochlear circle were obviously dilated and hyperemic. After 4 days of detonation, the blood vessels of the hair cells in the cochlear nucleus recovered to the normal range. The threshold of CAP shift was maximal at 4kHz and 8kHz and basically coincided with 1T and 2T , But not with vascular pattern changes in vascular correspondence, it seems that changes in cochlear microcirculation and hair cell damage is not directly related.