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methemoglobinemia met·he·mo·glo·bi·ne·mi·a (mět'hē-mə-glō'bə-nē'mē-ə)
Methemoglobin in the blood.
decrease in the oxygen-carrying capacity of the red blood cells (erythrocytes) due to the presence of methemoglobin in the blood. The severity of the symptoms of methemoglobinemia is related to the quantity of methemoglobin present in the circulation and range from a bluish discoloration of the skin and mucous membrane to weakness, difficulty in breathing, and dizziness in the more severe cases.