Does acute hypoxia cause fetal arterial blood flow redistribution?
Chronic fetal hypoxia in fetal growth restriction due to impaired placentation is associated with centralization of blood flow to the vital organs, such as brain, heart and adrenal glands, in order to maintain oxygenation. There is a correlation between fetal hypoxemia and low impedance to blood flow in the middle cerebral artery. However, there is no association between abnormal flow velocity waveforms and fetal distress in an unselected population, and this reported case also suggests that Doppler ultrasound is of no value in identifying acute fetal distress.
Krampl
E
E
Department of Obstetrics and Gynaecology, Klinisches Sekretariat Ebene 8C, University of Vienna, Währinger Gürtel 18-20, A-1090 Vienna, Austria. elisabeth.krampl@akh-wien.ac.at
Chalubinski
K
K
Schatten
C
C
Husslein
P
P
D000208:Acute Disease; D000328:Adult; D001013:Aorta, Thoracic / Q000000981:diagnostic imaging / Q000503:physiopathology*; D001783:Blood Flow Velocity / Q000502:physiology; D002536:Cerebral Arteries / Q000000981:diagnostic imaging / Q000503:physiopathology*; D005260:Female; D005316:Fetal Distress / Q000000981:diagnostic imaging / Q000503:physiopathology*; D005317:Fetal Growth Retardation / Q000000981:diagnostic imaging / Q000503:physiopathology*; D005311:Fetal Hypoxia / Q000503:physiopathology*; D006340:Heart Rate, Fetal / Q000502:physiology; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D016216:Ultrasonography, Prenatal; D014469:Umbilical Arteries / Q000000981:diagnostic imaging / Q000503:physiopathology