Characteristics of blood flow in intrauterine growth‐restricted fetuses with hypercoiled cord

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Abstract
Objective To clarify the characteristics of fetoplacental blood flow of growth‐restricted fetuses with hypercoiled umbilical cord. Subjects Eight growth‐restricted fetuses with hypercoiled cord. Methods Flow velocity waveforms of the umbilical cord artery and vein, fetal abdominal aorta and fetal inferior vena cava were analyzed. Results The resistance index in the umbilical artery in the hypercoiled cases was lower than that in normal fetuses. Early‐diastolic reversed flow was observed in the abdominal aorta in some cases. In all cases, umbilical venous pulsation was observed in the entire cord until delivery. In one case, fetal heart failure occurred, resulting in pre‐mature delivery. An atrophic type of single umbilical artery was observed in four cases. Conclusion Fetal blood flow disturbance caused by a hypercoiled umbilical cord may be a cause of growth restriction. Copyright © 1999 International Society of Ultrasound in Obstetrics and Gynecology

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