Skip to Content

alveolar-arterial oxygen difference


Definition: the difference or gradient between the partial pressure of oxygen in the alveolar spaces and the arterial blood: P(A–a)02. Normally in young adults this value is less than 20 mm Hg.

See Also: alveolar gas equation

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.

© Copyright 2018 Wolters Kluwer. All Rights Reserved. Review date: Sep 19, 2016.