O2 for AMI with pulse ox of 94%
Giving O2 is not as simple as we were lead to believe in the past. As back country care givers, we rarely have O2. The American Heart Association’s emergency cardiac care guidelines have, since 2010, recommended as follows: There is insufficient evidence to support [oxygen’s] routine use in uncomplicated ACS. If the patient is dyspneic, hypoxemic or has obvious signs of heart failure, providers should titrate therapy, based on monitoring of oxyhemoglobin saturation, to 94% (Class I, LOE C).4
Take home point O2 not needed if pulse ox of 94% or higher
Subject: [W-EMED] Oxygen bad for MI? There has never been any evidence that oxygen was good for MI. Now there is at least a bit of evidence that it's bad:
Stub, D., et al. (2015). "Air Versus Oxygen in ST-Segment-Elevation Myocardial Infarction." Circulation 131(24): 2143-2150.