Definition Cyanosis refers to a bluish带蓝色的 带青色的 color of the skin and mucous membranes resulting from an increased quantity of reduced hemoglobin(亚铁血 红蛋白;还原血红蛋白,orof hemoglobin derivatives, in the small blood vessels of those areas. It is usually most marked in the lips, nail beds(甲床) ears and malar(颧骨的;颊的) eminences(隆 起Definition Cyanosis refers to a bluish(带蓝色的； 带青色的)color of the skin and mucous membranes resulting from an increased quantity of reduced hemoglobin(亚铁血 红蛋白；还原血红蛋白), or of hemoglobin derivatives, in the small blood vessels of those areas. It is usually most marked in the lips, nail beds(甲床), ears, and malar(颧骨的；颊的)eminences(隆 起)