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[Color-Doppler for predicting vascular resistance to feto-placental blood flow and fetal well-being].

Aloka Color-Doppler, model SSD-860, was used to observe the blood velocity waveforms in the umbilical artery and in the fetal descending thoracic aorta in 139 normal pregnant women from 16th to 40th week and 30 patients suffering from pregnancy induced hypertension (PIH syndrome). The ratio of systolic to diastolic peak flow (A/B) reflected the fetoplacental vascular resistance and peripheral resistance. The results demonstrated that the placental resistance in PIH syndrome and IUGR were much higher than that in normal pregnancy. The placental resistance decreased when patients condition improved after treatment and vice versa. This suggests that fetal blood velocity waveforms (FVW) is of great value in the intensive monitoring of IUGR fetuses. The blood velocity FVW was also of great value in evaluating the curative effects on PIH patients.