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[Umbilical and cerebral Doppler velocimetry hypertension in pregnancy]
R C Rudigoz1, M Thomé Saint-Paul, T Gindre
1Service de Gynécologie-Obstétrique, Hôpital de la Croix-Rousse, Lyon.
The authors carried out a combined study using Doppler Flow Studies of the umbilical and fetal anterior cerebral arteries in 26 pregnancies which were complicated by maternal hypertension. Using the ratio between the cerebral and the umbilical blood flow it may be possible to diagnose intra-uterine growth retardation more accurately than using classical measurements. An inversion of the ratio between the cerebral and the umbilical flows has a great prognostic value with a sensibility of 91.6%, a specificity of 87.5% and a positive predictive value of 84.6% with a negative predictive value of 93.13%. There may however quite often be a lengthy interval of time between the appearance of change in the ratio and the appearance of fetal distress, so that this sign can only be one indication for delivery of the fetus.
The authors carried out a combined study using Doppler Flow Studies of the umbilical and fetal anterior cerebral arteries in 26 pregnancies which were complicated by maternal hypertension. Using the ratio between the cerebral and the umbilical blood flow it may be possible to diagnose intra-uterine growth retardation more accurately than using classical measurements. An inversion of the ratio between the cerebral and the umbilical flows has a great prognostic value with a sensibility of 91.6%, a specificity of 87.5% and a positive predictive value of 84.6% with a negative predictive value of 93.13%. There may however quite often be a lengthy interval of time between the appearance of change in the ratio and the appearance of fetal distress, so that this sign can only be one indication for delivery of the fetus.