Pulmonology · Critical Care
Alveolar Gas Equation (PAO2) calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
Complete all required inputs to calculate the score.
Formula inputs
- Alveolar Fio2 Fraction (fraction)Accepted range: 0.21 to 1
- Alveolar Patm Mmhg (mmHg)Accepted range: 400 to 760
- Alveolar Paco2 Mmhg (mmHg)Accepted range: 10 to 100
- Alveolar Rq (ratio)Accepted range: 0.7 to 1
Primary source
Rossi A et al. Physiology of the alveolar gas equation. Eur Respir J. DOI: 10.1183/13993003.0123-2016. PMID: 27053832. Scope: PAO2 (mmHg) = FiO2 × (Patm − PH2O) − PaCO2/RQ with PH2O = 47 mmHg at body temperature. (2016)
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