Alveolar Po(2) - Calculator
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FIO2
PB
PH2O
PCO2
R e s u l t s
PAO2
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Alveolar Po(2) - Calculator

Alveolar PO 2 , P(A-a)O 2 , PaO 2 /PAO 2 . The PAO 2 is calculated from the alveolar gas equation:

Alveolar PO 2 = [(Barometric Pressure - Water Vapor Pressure) * FiO 2 ] - [1.25 * Pco 2 ]