fractional inspired oxygen (FiO2)

Introduction

0.2-1.0. Room air is 20% O2 or fiO2 of 0.2

Procedure

• for mechanical ventilation, start with FiO2 of 1.0
• titrate down to SaO2 of 92-95%

Additional terms

• inhaled oxygen concentration

Component of

• partial pressure of oxygen in arterial blood/fractional inspired oxygen; PaO2/FiO2