Abstract
Venous blood from the dorsal surface of the hot hand of 23 conscious patients was analyzed by micromethods. The pH, Pco2, Po2 and derived oxygen saturation were compared with those of blood taken from the radial artery; significant differences were found. Arterialized venous blood may be regarded as arterial blood with a venous admixture which in this series averaged about 11 per cent of the total flow through the hand. For clinical measurements of Pco2 and pH, arterialized venous blood may provide an adequate estimate. It appears to be of little use as a measure of arterial Po2 or oxygen saturation.
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