Fraction of inspired oxygen

Contents

Fraction of inspired oxygen (FiO2) is the percentage of oxygen concentration participating in gas exchange in the alveoli[1].

Uses

The ratio between partial pressure of oxygen in arterial blood (PaO2) and FiO2 is used as an indicator of hypoxemia per the American-European Consensus Conference on lung injury. A high FiO2 has been shown to alter the ratio of PaO2/FiO2[1].

Related mathematics

References

  1. ^ a b Allardet-Servent J, Forel JM, Roch A, Guervilly C, Chiche L, Castanier M et al. (2009). "FIO2 and acute respiratory distress syndrome definition during lung protective ventilation.". Crit Care Med 37 (1): 202–7, e4-6. doi:10.1097/CCM.0b013e31819261db. PMID 19050631.