胎儿听力监测中的声振刺激试验

Vibratory Acoustic Stimulation Test in Fetal Hearing Monitor

为了探测胎儿听力缺陷的产前诊断，对妊娠２７周后的５７例孕妇进行声振刺激实验（ＶＡＳＴ）及对她们的５７例新生儿进行听性脑干反应（ＡＢＲ）测试。，结果：胎儿２７周胎龄时已具有听功能；ＶＡＳＴ可靠性较高（以胎心和胎动二种方法判断阳性率为８７．７％及８９．５％），安全；２例胎儿ＶＡＳＴ无反应，出生后ＡＢＲ结果异常。声振刺激试验能否作为一种胎儿听力筛选的手段，有待进一步证实。

In order to seek an antepartum diagnosis of hearing impairment in fet us,a yibratory a-coustic stimulation test(VAST)was carried out with 57 women who were pregnant 27 weeks and an ABR test was carried out with their57 newbrn babies.The results showed :(1)On or after the 27th week the fetus would have the function of hearing.(2)The reliability of VAST was high(two positive rates were 8 7.7%and 8 9.5%)and the VAST was safe.(3)There was a correlatiOn between fetal VASTand newborn ABR(P< 0. 05 ).We consider that VAST is a simple,safe and effective measure for fetal hearing screening.