FiO2 stands for which phrase?

FiO2 stands for which phrase?

• A. Fraction of inhaled oxygen
• B. Fraction of inspired oxygen
• C. Fraction of integrated oxygen
• D. Oxygen saturation percentage

Answer: (B)

FiO2 is the Fraction of inspired oxygen—the portion of oxygen in the gas the patient breathes. In room air, you’re inhaling about 21% oxygen. When supplemental oxygen is given, the FiO2 increases because oxygen is added to the air mix, and it can be raised up to near 100% with certain delivery methods. The word inspired is the standard term for the gas entering the lungs, which is why this phrase is used rather than inhaled or integrated. It’s also different from oxygen saturation, which is a blood measure (how much oxygen is bound to hemoglobin) rather than how much oxygen is present in the air you breathe.

FiO2 is the Fraction of inspired oxygen—the portion of oxygen in the gas the patient breathes. In room air, you’re inhaling about 21% oxygen. When supplemental oxygen is given, the FiO2 increases because oxygen is added to the air mix, and it can be raised up to near 100% with certain delivery methods. The word inspired is the standard term for the gas entering the lungs, which is why this phrase is used rather than inhaled or integrated. It’s also different from oxygen saturation, which is a blood measure (how much oxygen is bound to hemoglobin) rather than how much oxygen is present in the air you breathe.