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A-a O₂ Gradient

Assesses for degree of shunting and V/Q mismatch.

Use 760 mm Hg in US units and 101.33 kPa in SI units, for Atmospheric Pressure at sea level.
mm Hg
mm Hg
%
mm Hg
years

Advice

After calculating the A-a Gradient and determining if it is elevated or normal, one can rule out several causes of hypoxia.