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  • Title: [Clinical evaluation of fetal blood flow velocity in cerebral artery and umbilical artery by color Doppler imaging].
    Author: Zhang YN.
    Journal: Zhonghua Fu Chan Ke Za Zhi; 1993 Jul; 28(7):395-6, 440-1. PubMed ID: 8287721.
    Abstract:
    Fetal cerebral blood flow velocity waveforms were examined by color Doppler imaging. The results showed that the ratio of fetal middle cerebral artery resistance index (RImca) to umbilical artery resistance index (RIua) in normal late pregnancy was greater than 1 (RImca/RIua > 1). It was negatively correlated with blood pressure in pregnancy induced hypertension (PIH). It indicated that RIua increased gradually in PIH and RImca decreased when cerebral vessel damage occurred. RImca/RIua ratio < 1 in PIH patient has higher prognostic value for perinatal outcome than umbilical artery flow velocity waveform alone. The positive likelihood ratio is 25.97, and the negative likelihood ratio is 0.15.
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