Comparative evaluation of epidural bupivacaine - dexmedetomidine and bupivacaine -fentanyl on Doppler velocimetry of uterine and umbilical arteries during labor.

Objective: uteroplacental blood flow is affected by myometrial contractions and hypotension. Epidural analgesia is frequently complicated by hypotension. The aim of the study was to compare the effect of bupivacaine-dexmedetomidine (BD) or bupivacaine - fentanyl (BF) on uterine artery pulsatitly index (UtA-PI) and umbilical artery pulsatitly index (UA-PI) during uterine contractions and relaxations.