But it is important to realize that hyperoxemia is associated with increased mortality and unfavorable outcome, such as more neurological impairment and Acute Respiratory Distress Syndrome (ARDS). Decisions about the initiation and discontinuation of oxygen supplementation in acutely ill patients are made in the ED.

What happens in hyperoxia?

Hyperoxia is a state of excess supply of O2 in tissues and organs. Oxygen toxicity occurs when the partial pressure of alveolar O2 (PAO2) exceeds that which is breathed under normal conditions. With continuous exposure to supraphysiologic concentrations of O2, a state of hyperoxia develops.

What does hyperoxia mean?

Hyperoxia is a state of excess supply of O2 in tissues and organs. Oxygen toxicity occurs when the partial pressure of alveolar O2 (PAO2) exceeds that which is breathed under normal conditions.