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Calculators

Alveolar Oxygen Partial Pressure (PAO2)

Pbar: mm Hg
FiO2: Use decimal forms (e.g., 0.05)
PaCO2: mm Hg
PAO2: mm Hg

PAO2 = (Pbar - 47) • FiO2 - (PaCO2 • 1.25) [mm Hg]
Pbar = 760 mm Hg at sea level.
PAO2 is approx. 100 mm Hg on room air at sea level.

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