cyanosis

Approach to a patient with cyanosis

Cyanosis is an abnormal bluish discoloration of the skin and mucous membranes due to the presence of reduced hemoglobin in the blood. The blue color usually represents excessive amounts of deoxygenated hemoglobin, although, in some patients, it results from increased amounts of methemoglobin or sulfhemoglobin. Cyanosis may be central or peripheral. In central cyanosis, the […]

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