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Oxygen Index (OI)

The Oxygen Index (OI) is used to assess the severity of hypoxemic respiratory failure, particularly in neonates. It is a key criterion for ECMO candidacy.

Disclaimer

This calculator is for educational purposes only. Always verify with clinical judgment.

Calculator

FiO2 (%, e.g. 100)

Mean Airway Pressure (MAP) (cmH2O)

PaO2 (mmHg)

Formula

OI = (FiO2 × MAP × 100) / PaO2

References

Walsh BK. Neonatal and Pediatric Respiratory Care, 5th Edition.
ELSO Guidelines for Cardiopulmonary Extracorporeal Life Support.