What Oxygen Index value is commonly used as an indication for ECMO?

What Oxygen Index value is commonly used as an indication for ECMO?

• A. 20
• B. 30
• C. 40
• D. 50

Answer: (C)

Oxygenation Index measures how hard it is to oxygenate the blood while on mechanical ventilation. It combines mean airway pressure, the fraction of inspired oxygen, and the arterial oxygen level into a single number: OI = (mean airway pressure × FiO2 × 100) / PaO2. A higher OI means oxygenation is poor despite ventilator support. ECMO is considered when conventional ventilation cannot maintain adequate oxygenation and carbon dioxide removal despite maximal settings. The value around 40 is a commonly cited threshold indicating severe hypoxemia that prompts consideration of ECMO, especially in pediatric cases. It reflects a level at which the lungs are not effectively oxygenating blood despite aggressive ventilation, so bypassing the lungs with ECMO can provide necessary support.

Oxygenation Index measures how hard it is to oxygenate the blood while on mechanical ventilation. It combines mean airway pressure, the fraction of inspired oxygen, and the arterial oxygen level into a single number: OI = (mean airway pressure × FiO2 × 100) / PaO2. A higher OI means oxygenation is poor despite ventilator support.

ECMO is considered when conventional ventilation cannot maintain adequate oxygenation and carbon dioxide removal despite maximal settings. The value around 40 is a commonly cited threshold indicating severe hypoxemia that prompts consideration of ECMO, especially in pediatric cases. It reflects a level at which the lungs are not effectively oxygenating blood despite aggressive ventilation, so bypassing the lungs with ECMO can provide necessary support.