A respiratory disorder is described as the result of decreased arterial oxygenation from pulmonary disease or pulmonary dysfunction. What is this disorder called?

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Central cyanosis is the bluish discoloration that appears when arterial blood is low in oxygen. When pulmonary disease or dysfunction reduces the amount of oxygen carried in the blood (hypoxemia), the body tissues can’t get enough oxygen, and deoxygenated hemoglobin gives blood a blue tint visible in the lips, tongue, and mucous membranes. This sign distinguishes true systemic oxygen deficiency from peripheral cyanosis, which arises from slowed blood flow in the extremities rather than a drop in arterial oxygen content. So the description of decreased arterial oxygenation from lung disease aligns with central cyanosis, the visible indication of that oxygenation problem.