Cerebral Circulation Studied with Labelled Red Cells in Healthy Males

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Abstract
The cerebral blood flow, blood volume and circulation time through the brain were investigated with labelled radioactive erythrocytes in 34 healthy males. The time intervals of appearance, peak concentration and disappearance in the jugular bulbs were determined from dilution curves obtained after injection into carotid arteries. The variations were found to be small and no correlation was obtained between the cardiac output and the cerebral blood flow or between the latter and the age of the subjects.