Evaluation of Subendometrial and Intramyometrial Blood Flow after Intravenous Tranexamic Acid for Prevention of Postpartum Hemorrhage in Vaginal Delivery: A Randomized Controlled Study

Objective: The study aims to test the effect of tranexamic acid (TA) on uterine vasculature and blood loss after vaginal delivery. Materials and methods: A randomized, double-blind, placebo-controlled trial, conducted in Assiut Woman's Health Hospital, Egypt between the 1st of October 2015 and the 31st of March 2016 included pregnant women (37-42 weeks) with a single living cephalic fetus. The eligible women were randomized to receive TA or placebo after vaginal delivery. Doppler indices were measured for the subendometrial, intramyometrial and uterine blood vessels two hours after delivery. The main study outcome was the effect of TA on subendometrial and intramyometrial blood fl ow.