what causes cyanosis
Cyanosis is a physical sign causing bluish discoloration of the skin and mucous membranes. Cyanosis is caused by a lack of oxygen in the blood. Cyanosis is associated with cold temperatures, heart failure, lung diseases, and smothering.yanosis. a bluish discoloration of the skin and mucous membranes due to excessive concentration of reduced hemoglobin in the blood. adj., adj cyanotÂ´ic. central cyanosis that due to arterial unsaturation, the aortic blood carrying reduced hemoglobin.