Key result
Arterialized capillary blood PO2 estimations can approximate arterial PO2 if sufficient vasodilatation is achieved to reduce the arteriovenous oxygen difference.
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Explains the physiological basis for why arterialized capillary blood PO2 from the ear lobe can approximate arterial PO2 under conditions of sufficient vasodilatation.
JM Hughes (1996) reported an editorial. Arterialized capillary blood gas estimation vs. Arterial puncture was evaluated on Oxygen tension (PO2) difference. Arterialized capillary blood PO2 estimations can approximate arterial PO2 if sufficient vasodilatation is achieved to reduce the arteriovenous oxygen difference.
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