Role of Doppler Indices in the Prediction of Adverse Perinatal Outcome in Preeclampsia

Abstract

Objective: To determine diagnostic accuracy of systolic/diastolic ratio and cerebro-placental index in predicting adverse perinatal outcome among patients in preeclampsia.
 Study Design: Cross-sectional validation study.
 Place and Duration of Study: Department of Obstetrics and Gynaecology, Pak Emirates Military Hospital, Rawalpindi, from Jun to Dec 2017.
 Methodology: A total of 191 patients with preeclampsia were included. Doppler ultrasound (including doppler wave forms obtained from free floating portion of umbilical artery and doppler waveform from middle cerebral artery at the level of circle of Willis) examination was done after gestational age 30 weeks and Doppler study repeated at 2-4 weeks interval depending on severity of preeclampsia and abnormalities of waveform. Cases were followed and results of last Doppler examination within 10 days of delivery were considered and perinatal outcome noted.
 Results: The sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy of systolic/diastolic ratio in predicting adverse perinatal outcome among patients in preeclampsia, keeping actual adverse perinatal outcome as reference standard was 82.35%, 86.52%, 87.50%, 81.05% and 84.29% respectively. The sensitivity, specificity, positive predictive value, negative predictive value and diagnostic accuracy of cerebro-placental index in predicting adverse perinatal outcome among patients in preeclampsia, keeping actual adverse perinatal outcome as reference standard was 78.67%, 92.24%, 86.76%, 86.99% and 86.91% respectively.
 Conclusion: The diagnostic accuracy of systolic/diastolic ratio, cerebro-placental index in predicting adverse perinatal outcome among patients in preeclampsia is quite high.