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- W2440583822 startingPage "H27" @default.
- W2440583822 abstract "In 14 unanesthetized newborn lambs the relationship between cerebral blood flow (measured by radiolabeled microspheres) and arterial O2 saturation (SaO2) was compared during two types of hypoxia: hypoxic hypoxia and carbon monoxide (CO) hypoxia. Cerebral venous samples were obtained from the sagittal sinus. The Increase in blood flow was 47% greater during CO than during hypoxic hypoxia. Cerebral O2 consumption and O2 delivery were constant during hypoxic hypoxia. Thus fractional O2 extraction, which equals O2 consumption/O2 delivery, remained constant with hypoxic hypoxia. During CO hypoxia, although O2 consumption remained constant, O2 delivery increased and fractional O2 extraction decreased. This decline in fractional O2 extraction was correlated with the leftward shift of the oxyhemoglobin dissociation curve that accompanied CO hypoxia. We suggest that cerebral blood flow depends on both SaO2 and the position of the oxyhemoglobin dissociation curve in the newborn lamb. However, this correlation does not exclude other potential histotoxic effects contributing to the relative overperfusion with CO hypoxia." @default.
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- W2440583822 date "1982-07-01" @default.
- W2440583822 modified "2023-10-12" @default.
- W2440583822 title "Cerebral circulatory response to carbon monoxide and hypoxic hypoxia in the lamb" @default.
- W2440583822 doi "https://doi.org/10.1152/ajpheart.1982.243.1.h27" @default.
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