The Oxygenation Index (OI) is a measure of oxygenation in relation to respiratory support.


oxygenation index =

= (mean airway pressure in cm H2O) * (FIO2 from 0.21 to 1.0) / (PaO2 in mm Hg)


One variation is to express the oxygenation index as above, multiplied by 100.



• The higher the oxygenation index, the more severe the oxygenation deficit.


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