Blue baby syndrome
Two situations that lead to cyanosis in infants
Blue baby syndrome
Blue baby syndrome can refer to conditions that cause cyanosis, or blueness of the skin, in babies as a result of low blood oxygen levels. This term traditionally refers to cyanosis as a result of: Cyanotic heart disease, which is a category of congenital heart defect that lowers blood oxygen levels. It can be caused by reduced blood flow to the lungs or by mixing oxygenated and deoxygenated blood. Methemoglobinemia, which is a disease defined by high levels of methemoglobin in the blood. Increased levels of methemoglobin prevent oxygen from being released into the tissues and result in hypoxemia. Although these are the most common causes of cyanosis, other potential factors can cause a blue tint to a baby's skin or mucous membranes. These factors include hypoventilation, perfusion or ventilation differences in the lungs, and poor cardiac output of oxygenated blood, among others. The blue baby syndrome or cyanosis occurs when absolute amount of deoxygenated hemoglobin > 3g/dL which is...
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