What Is a Normal Fio2

Natural air includes 21% oxygen, which is equivalent to FIO2 of 0.21. Oxygen-enriched air has a higher FIO2 than 0.21; up to 1.00 which means 100% oxygen. FIO2 is typically maintained below 0.5 even with mechanical ventilation, to avoid oxygen toxicity, but there are applications when up to 100% is routinely used.

What does FiO2 percentage mean?

FiO2 is defined as the percentage or concentration of oxygen that a person inhales (the fraction of inspired oxygen). The atmospheric air that we inhale on a day to day basis is made up of 21% oxygen, 78% nitrogen and 1% trace elements such as argon, carbon dioxide, neon, helium and methane.

What is FiO2 on a ventilator?

FiO2: Percentage of oxygen in the air mixture that is delivered to the patient. Flow: Speed in liters per minute at which the ventilator delivers breaths.