Up-down determination of the ED(90) of oxytocin infusions for the prevention of postpartum uterine atony in parturients undergoing Cesarean delivery.

Introduction: Use of the lowest effective dose of oxytocin may reduce side effects. This study was designed to determine the effective dose (ED)(90) of oxytocin infusion for an elective Cesarean delivery (CD) to prevent uterine atony.

Methods: The participants were ASA I and II, non-obese, non-labouring adult women undergoing an elective CD at term with a singleton gestation.