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A study of correlation of individual biophysical variables and vibroacoustic stimulation with perinatal outcome

Author(s): Hemant Deshpande | Chandrakant Madkar | Priyanka Dahiya

Journal: International Journal of Pharmacy and Biomedical Sciences
ISSN 0976-5263

Volume: 03;
Issue: 04;
Start page: 233;
Date: 2012;
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Keywords: Vibroacoustic stimulation | Biophysical variables | high risk pregnancy

Vibroacoustic stimulator provokes a physiological sympathetic range response characterized by fetal heart rate acceleration suggesting an intact non-hypoxic CNS. To improve the sensitivity other variables of fetal well being should be added to acoustic stimulation. Visual Acoustic Stimulation Test (VAST) utilizes ultrasound to evaluate the fetal responses to acoustic stimulation. Observation of fetal startle response to vibroacoustic stimulus was found to be associated with a FBP score of eight and above. Vibroacoustic stimulation has been reported to wake up the fetus from sleep cycles and hence reduce false positive results. Most fetuses after 30-32 weeks respond to acoustic stimulation. The observation time after VAST is maximum ten minutes, Fetal V.A.S.T. predicted perinatal outcome with highest accuracy, is highly sensitive, specific with low false positive and negative rates Mean testing time in our study was 5.32 ± 0.68 minutes. The subjects with normal startle were 154 and out of which 67(43.50%) had normal perinatal growth while 87(56.50%) had abnormal perinatal growth. With total 46 subjects with abnormal startle 8(17.39%) had normal perinatal growth while 38(82.16) had abnormal perinatal growth. The association was found to be statistically significant (p
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