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Cornell Pediatrics

Oxygenation Index

Calculate the oxygenation index given FiO2, mean airway pressure and PaO2

Input FiO2  %
Input Mean Airway Pressure   cmH2O
Input PaO2  torr
Oxygenation Index =  


The equation is:

OI =
FiO2 * MAP

  • Ortiz RM, Cilley RE, Bartlett RH. Extracorporeal membrane oxygenation in pediatric respiratory failure. Pediatr Clin North Am. 1987 Feb;34(1):39-46.

Special thanks to Mathias Tschopp, Creator of MedCalc for handheld devices.


Created: January 7, 2000
Revised: January 31, 2001

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