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Vibratory acoustic stimulation and fetal gasping
F Marks1, E Z Zimmer, C R Chao
1Department of Obstetrics and Gynecology, Sloane Hospital for Women, Presbyterian Hospital in the City of New York, New York, USA.
The Journal of Reproductive Medicine
|July 1, 1995
Summary
Vibratory acoustic stimulation (VAS) does not cause gasping in normal fetuses. This study found VAS increased fetal body movements and decreased breathing, but no gasping occurred.
Area of Science:
- Perinatology
- Fetal Physiology
Background:
- Vibratory acoustic stimulation (VAS) is used to shorten fetal heart rate monitoring.
- Concerns exist regarding potential fetal effects of VAS.
Purpose of the Study:
- To investigate if acute Vibratory acoustic stimulation (VAS) is associated with fetal gasping in normal fetuses.
- To assess the immediate impact of VAS on fetal behavior.
Main Methods:
- 37 normal fetuses (37-42 weeks gestation) with normal amniotic fluid underwent baseline sonographic assessment.
- Fetal breathing, body movements, and gasping were monitored before and after a 3-second VAS stimulus.
- A fetal gasp was defined as isolated, deep, inspiratory-type chest/abdominal movements.
Main Results:
- VAS significantly increased fetal body movements (P < .001).
- VAS significantly decreased fetal breathing (P < .003).
- No gasping movements were observed in response to VAS.
Conclusions:
- Vibratory acoustic stimulation (VAS) does not appear to induce gasping in normal, term fetuses.
- The study suggests VAS is safe concerning gasping reflex in fetuses.