The objective was to assess the diagnostic power of the umbilical venous-arterial index (VAI) as a combination of the pulsatility index in the umbilical artery and the normalized blood flow volume in the umbilical vein for the prediction of poor fetal outcome.
A combination of umbilical artery PI and normalized blood flow volume in the umbilical vein: venous-arterial index for the prediction of fetal outcome.
Department of Obstetrics & Gynecology, University Medical Center, Johannes Gutenberg University Mainz, Langenbeckstrasse 1, 55101 Mainz, Germany. tchirikov@frauen.klinik.uni-mainz.de