Apr 6, 2014
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CYANOSIS

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A condition in which the skin – usually of the face and extremities – takes on a bluish tinge. It accompanies states in which the blood is not properly oxygenated in the lungs, and appears earliest through the nails, on the lips, on the tips of the ears, and over the cheeks. It may be due to blockage of the air passages, or to disease in the lungs, or to a feeble circulation, as in heart disease. (See CHRONIC OBSTRUCTIVE PULMONARY DISEASE (COPD); METHAEMOGLOBINAEMIA.)

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