Low oxygen: Hypoxia is the low tension of oxygen, hypoxemia is low oxygen tension or amount in the blood, desaturation is low measured oxygen occupying the red blood cells. When there is hypoxia, there is air hunger, so a person will breath harder to catch air, there is dyspnea. The signs could range from cyanosis or bluish skin or nail beds, confusion, unconsciousness or frank heart attack.
Answered 1/4/2014
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