Paramedic term for time AND life-critical patient, especially when their condition deteriorates so badly that they could pass if not treated immediately.
Paramedic: Received a Code One case (time critical and unconscious) patient who suffered a fall, but during our travels, but it has turned into a Priority Zero as she also a cardiac patient who is having a cardiac arrest as we speak. We must get to her ASAP.
by brockhoward October 1, 2019
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