Top definition
To lose oxygen as from not breathing. Desat is short for desaturate. Oxygen gets less and less and if oxygenation isn't restored either by the patient, CPR, or a ventilator, the patient will die. Desat is commonly used in the hospital when talking about a patient who's oxygen saturations are going down as seen on a pulse oximeter and/or arterial blood gas.
I can't breathe. I need oxygen or I will desat. All right. Let's get some oxygen going in by Non-rebreather at 90%
by ventilator96 November 08, 2009
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