Hemodynamic changes with paradoxical blood flow in expectant management of abruptio placentae.

Abstract

Because the early diagnosis of abruption often is missed or misinterpreted, emergency situations frequently do not permit adequate management. A woman of 26-weeks' gestation was transferred with symptoms and laboratory findings typical for abruption. Ultrasound, including Doppler, revealed a subchorionic hematoma, pathologic blood flow in the uterine arteries, low pulsatility index values in the fetal cerebral and umbilical arteries (paradoxical blood flow), and high maximal velocities in the fetal aorta. Repeated Doppler and laboratory examinations revealed a gradual restoration to normal of the arterial uterine blood flow pattern, of paradoxical blood flow, aortic maximal velocities, and laboratory values. Serial Doppler measurements considering the paradoxical pattern illustrate pathophysiologic mechanisms of abruption that may assist in deciding whether to deliver immediately or to continue intense surveillance.