Flow velocity waveforms in the fetal internal carotid artery relative to fetal blood gas and acid-base measurements in normal pregnancy.
Flow velocity waveforms in the fetal internal carotid artery during fetal behavioural state 2F were compared with blood gas and acid-base data from fetal scalp blood samples immediately following artificial rupture of the membranes in 17 normal term pregnancies. The pulsatility index in the fetal internal carotid artery was positively related to PO2 and base excess suggesting that also under physiological conditions fetal cerebral vascular resistance may respond to changes in fetal oxygenation.
Simonazzi
E
E
Department of Obstetrics and Gynaecology, Policlinico Monteluce, Perrugia, Italy.
Wladimiroff
J W
JW
van Eyck
J
J
D000136:Acid-Base Equilibrium; D001783:Blood Flow Velocity; D001784:Blood Gas Analysis; D002245:Carbon Dioxide / Q000097:blood*; D002343:Carotid Artery, Internal / Q000502:physiology*; D005312:Fetal Blood / Q000032:analysis*; D006801:Humans; D010100:Oxygen / Q000097:blood*
D002245:Carbon Dioxide; D010100:Oxygen