Fetal oxygenation and Doppler ultrasonography of cardiovascular hemodynamics in a chronic near-term sheep model

Article Abstract:

A study to hypothesize that a decrease in fetal oxygenation without acidemia in a near-term fetal sheep leads to cardiovascular hemodynamic changes that are detectable by Doppler ultrasonography was conducted. The results revealed that during decreased fetal oxygenation Doppler ultrasonography demonstrated increased fetal cardiac output and pulmonary artery vascular impedance and a relative increase in the retrograde blood flow component in the aortic isthmus.

Cardiovascular diseases, Prenatal diagnosis

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Quantitative analysis of fetal pulmonary vasculature by 3-dimensional power Doppler ultrasonography in isolated congenital diaphragmatic hernia

Article Abstract:

A quantitative analysis is conducted to evaluate the potential of 3-dimensional (3D) power Doppler imaging to predict neonatal outcome and pulmonary arterial hypertension (PAH) in congenital diaphragmatic hernia (CDH). Results suggest that all prenatal pulmonary vascular indices are constant throughout gestation, and perinatal outcome and postnatal PAH in isolated CDH can be predicted using the vascular indices assessed by 3D power Doppler histogram.

Blood circulation disorders, Vascular diseases

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Prediction of severe fetal anemia in red blood cell alloimmunization after previous intrauterine transfusions

Article Abstract:

Doppler examinations at 1 to 2 weekly intervals of the middle cerebral artery (MCA) peak systolic velocity (PSV) is useful in identifying severe cases of anemic fetuses before the first intrauterine blood transfusion. One blood transfusion can make the prediction of severe fetal anemia less accurate and if two previous transfusions have taken place then the MCA-PSV is not useful in predicting severe anemia at all.

Fetal diseases, Blood transfusion, Intrauterine, Intrauterine blood transfusion

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