If FIO2 is small then
In which case the equation can be simplified to:
|pAO2||The alveolar partial pressure of oxygen (pO2)||107 mmHg (14.2 kPa)|
|FIO2||The fraction of inspired gas that is oxygen (expressed as a decimal).||0.21|
|PATM||The prevailing atmospheric pressure||760 mmHg (101 kPa)|
|pH2O||The saturated vapour pressure of water at body temperature and the prevailing atmospheric pressure||47 mmHg (6.25 kPa)|
|paCO2||The arterial partial pressure of carbon dioxide (pCO2)||36 mmHg (4.79 kPa)|
|RQ (RER)||The respiratory quotient (Respiratory Exchange Ratio)||0.8|
Sample Values given for air at sea level at 37°C.
Read more about this topic: Alveolar Gas Equation
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