The effect of hyperventilation on maternal placental blood flow in pregnant rabbits.

Abstract

1. In anaesthetized pregnant rabbits near term, cardiac output and its distribution were measured by injection of isotope-labelled microspheres. Hypocapnia (mean arterial P(CO) (2) 18 mm Hg), induced by intermittent positive pressure hyperventilation, caused a 43% reduction in maternal placental blood flow, attributed mainly to vasoconstriction. Myometrial… (More)

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