Cyanosis

Definition

Cyanosis is a bluish discoloration of the skin and mucous membranes due to inadequate oxygenation of the blood. It can indicate underlying respiratory or cardiovascular issues that require immediate attention.

5 Must Know Facts For Your Next Test

1. Cyanosis often appears in areas with thin skin such as lips, nail beds, and earlobes.
2. It can be a sign of hypoxemia which is low levels of oxygen in the blood.
3. Peripheral cyanosis affects extremities like hands and feet, while central cyanosis affects core body parts including the lips and tongue.
4. Conditions like chronic obstructive pulmonary disease (COPD) and congenital heart defects can cause cyanosis.
5. Nutritional deficiencies, such as anemia, can exacerbate symptoms of cyanosis by impairing oxygen transport.

Review Questions

• What are common physical locations where cyanosis can first be observed?
• How does peripheral cyanosis differ from central cyanosis?
• What role do nutritional deficiencies play in the development or exacerbation of cyanosis?

Related terms

Hypoxemia: A condition characterized by low levels of oxygen in the blood.

Anemia: A deficiency in red blood cells or hemoglobin that impairs oxygen transport.

Chronic Obstructive Pulmonary Disease (COPD): A group of lung conditions that cause breathing difficulties.