Divon M Y, Braverman J J, Guidetti D A, Langer O, Merkatz I R
Department of Obstetrics and Gynecology of Albert Einstein College of Medicine of Yeshiva University, Bronx, NY.
Am J Obstet Gynecol. 1987 Dec;157(6):1355-8. doi: 10.1016/s0002-9378(87)80223-5.
The effects of intrapartum vibratory acoustic stimulation during periods of decreased fetal heart rate variability were studied in 25 healthy term fetuses. Fetal monitoring and real-time ultrasound scanning were used simultaneously to detect fetal response. Vibratory acoustic stimulation was provided by an artificial larynx generating a signal at 85 dB and 85 Hz. This stimulus was applied for 5 seconds on the maternal abdomen over the fetal head after a 20-minute period of decreased fetal heart rate variability. All fetuses reacted with an immediate fetal heart rate acceleration of at least 10 bpm (range: 10 to 35 bpm, mean +/- SD = 18.4 +/- 7.0), and 19 fetuses also had sudden fetal body movement. A deceleration of the fetal heart rate after the initial acceleration was observed in nine fetuses (range: 15 to 70 bpm, mean +/- SD = 45.5 +/- 16.5). The implications of these findings are discussed in relation to the possible use of fetal vibratory acoustic stimulation for intrapartum surveillance.
对25例足月健康胎儿在胎心率变异性降低期间进行产时振动听觉刺激的效果进行了研究。同时使用胎儿监护和实时超声扫描来检测胎儿反应。振动听觉刺激由一个人造喉提供，该人造喉产生85分贝和85赫兹的信号。在胎儿心率变异性降低20分钟后，将此刺激施加于孕妇腹部胎儿头部上方5秒钟。所有胎儿均立即出现至少10次/分钟的胎心率加速反应（范围：10至35次/分钟，平均±标准差=18.4±7.0），19例胎儿还出现了突然的胎儿身体运动。9例胎儿在初始加速后出现了胎心率减速（范围：15至70次/分钟，平均±标准差=45.5±16.5）。结合产时监护中胎儿振动听觉刺激的可能用途，对这些发现的意义进行了讨论。
