Symbol relating the hydrogen ion concentration or activity of a solution to that of a standard solution approximately equal to the negative logarithm of the hydrogen ion concentration. Oxygen saturation as measured by pulse oximetry Oxygen saturation of the hemoglobin of arterial blood The term formerly used ( A-a D O 2) is discouraged.Īlveolar-arterial tension ratio P aO 2: P AO 2 The term oxygen exchange index describes this ratio.
Inhaled air not part of gas exchange Blood gas, acid-base, and gas exchange terms P aO 2Īrterial oxygen tension, or partial pressureĪlveolar oxygen tension, or partial pressureĪrterial carbon dioxide tension, or partial pressureĪlveolar carbon dioxide tension, or partial pressureĪlveolar-arterial oxygen tension difference.
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