OXYGEN! Please put patient on NC 2 -4. This is one of our critical action in mock oral board questions, but is it really a critical action, how much oxygen do we need for a pt w/o hypoxemia? we discuss this in COPD and Sickle cell crisis, but there are more growing in the filed of cardiology related hyperoxia can harm. Intensive Care Medicine published an article “The association between hyperoxia and patient outcomes after cardiac arrest: analysis of a high-resolution database” in Jan 2015! Pao2 > 300 was associated with significant worse outcome, The conclusion is severe hyperoxia was independently associated with decreased survival to hospital discharge.