Role of vibroacoustic stimulation test in assessment of fetal well being in high risk pregnancy and comparison with nonstress test

Abstract

Introduction: High risk pregnancies need appropriate surveillance so that timely interventions can be employed and thus bring down the rate of perinatal morbidity and mortality. NST is commonly performed fetal surveillance test. Vibroacoustic stimulation test improves the sensitivity and specificity in high risk pregnancy. Method & Materials: The study was done on 150 patients with high risk pregnancies fulfilling inclusion criteria. NST and VAST was performed and results were interpreted. The perinatal outcome was noted. Results: Out of total 150 patients 133 were reactive for both NST and VAST. 17 patients were nonreactive on NST and 7 patients become reactive on performing VAST. However, 10 patients remains nonreactive on both NST and VAST. Conclusion: VAST is easy to perform, bed side test and cost effective adjuvant to NST, in the antenatal fetal assessment of high risk pregnancy with higher specificity, sensitivity, positive and negative predictive value in predicting perinatal outcome.