the difference or gradient between the partial pressure of oxygen in the alveolar spaces and the arterial blood: P(Aa)02. Normally in young adults this value is less than 20 mm Hg. See Also: alveolar gas equation.
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the difference or gradient between the partial pressure of oxygen in the alveolar spaces and the arterial blood: P(Aa)02. Normally in young adults this value is less than 20 mm Hg. See Also: alveolar gas equation.