Li Z, Wu M, Du B
Xinqiao Hospital, Third Military Medical University, Chongqin.
Zhonghua Fu Chan Ke Za Zhi. 1997 Mar;32(3):131-3.
To study the effects of vibratory acoustic stimulation (VAS) on fetal heart rate (FHR) and fetal movement (FM) of normal fetu at different gestational ages.
435 normal second and third-trimester pregnancies were studied using real time ultrasonography. FHR baseline was recorded. Then a five-second VAS was given and FM and (or) FHR was observed. The results of vibroacoustic stimulation testing (VAS-T), sound-provoked fetal movement (SPFM) and the amplitude of FHR acceleration were evaluated.
(1) The fetus started to response to VAS from the 24th gestational week, but most could not reach the diagnostic criteria of VAS-T. The responses of FM were normal. (2) From 28 week on, 90% of the fetu showed marked FM and acceleration of FHR after VAS. Over 98% of the term babies were reactive. (3) The detective rates of SPFM appeared significantly earlier than that of VAS-T.
It suggested that the development of fetal nervous system was matured at 28 weeks, and the development of motor nerves was earlier than that of the autonomic nerves.
研究振动声学刺激（VAS）对不同孕周正常胎儿心率（FHR）及胎动（FM）的影响。
采用实时超声对435例孕中晚期正常孕妇进行研究。记录FHR基线。然后给予5秒的VAS，观察FM和（或）FHR。评估振动声学刺激试验（VAS-T）、声音诱发胎动（SPFM）及FHR加速幅度的结果。
（1）胎儿从孕24周开始对VAS有反应，但多数未达VAS-T诊断标准。FM反应正常。（2）从孕28周起，90%的胎儿在VAS后出现明显FM及FHR加速。超过98%的足月儿有反应。（3）SPFM的检出率明显早于VAS-T。
提示胎儿神经系统在孕28周时发育成熟，运动神经发育早于自主神经。
