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KMID : 0361719900010010041
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Korean Journal of perinatology
1990 Volume.1 No. 1 p.41 ~ p.47
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Doppler blood flow velocity waveforms of the fetal cerebral artery in normal pregnancies
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Abstract
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Blood flow velocity waveforms recorded by pulsed real time Doppler ultrasound from the fetal internal carotid artery were analysed in 123 normal pregnancies. One hundred twentyeight determinations were carried out from the 29th to the 43th weeks of pregnancy. All cases presented highly pulsatile waveforms in the fetal internal carotid artery, with continuous forward flow during diastole. As gestation advances, the values for the A/B ratio and RI declined progressively indicating a gradual fall in resistance of the cerebral circulation in normal pregnancy. The reference values obtained from this study may be useful as a basis for new basic research and clinical application in prenatal care.
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