Volume : I, Issue : III, December - 2011

Visual Acoustic Stimulation Test (Vast) As A Predictor Of Fetal Wellbeing

Dr. Neelesh S Risbud, Dr. Shivaram Prakash

Abstract :

Objectives: To study the effectiveness of Visual Acoustic Stimulation Test (VAST) by assessing sensitivity, specificity, false positive and false negative tests of significance. Methods: VAST is a prospective observational study conducted in Obstetrics and Gynecology department, Smt. Kashibhai Navale Medical College, Nahre–Ambegaon, Pune, utilizing real–time ultrasound machine and acoustic viator of approximately 75 dB. A total of 70 pregnant women with high risk factors for fetal morbidity and with gestation period of 34 weeks or more consented and were subjected for the study. The perinatal outcome recorded as abnormal when the five minutes APGAR score of less than 7, thick meconium liquor, low birth weight, neonatal intensive care requirements and perinatal death. Results: Sensitivity – 75%, Specificity – 88.7%, Positive predictive value (PPV) – 46.15%, Negative Predictive value (NPV) – 96.49%. Conclusions: The study concludes that VAST fairly detects probable abnormal perinatal outcome and thereby alerts for better perinatal care. VAST is a simple, easy to perform procedure and can be performed by a gynecologist, who has basic knowledge of ultrasound. VAST can be performed as a bedside procedure and faster than Bio Physical Profile (BPP).  

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Article: Download PDF   DOI : 10.36106/ijar  

Cite This Article:

Dr.Neelesh S Risbud, Dr.Shivaram Prakash Visual Acoustic Stimulation Test (Vast) As A Predictor Of Fetal Wellbeing Indian Journal of Applied Research, Vol.I, Issue.III December 2011


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