音刺激による胎児の反応の新しい記録法
1973 年 16 巻 3 号 p. 148-156
詳細
1973 年 16 巻 3 号 p. 148-156
We firstly recorded a human fetal heart tone after tone stimulus was given to maternal abdominal surface of third trimester by using of fetal heart rate meter and ultrasonic Doppler method, and the heart tone signal was converted into a train pulse which comprised only the initial beats by using of band-pass filter and photocell-lamp.
Further we observed the change of fetal heart rate and fetal movement used by digital computer to obtain sequencial controlled interval variation.
The results were as follows:
1) It was approved that the fetal movement was recognized within 10 seconds after tone stimulus was given and heart rate was increased within 20 seconds. The heart rate recovered within approximately 40 seconds.
2) We considered it was a good method to use Doppler method to find the hard of hearing of fetus at first trimester.
