<unk>  can refer to conditions that cause cyanosis, or<unk> ness of the skin, in babies as a result of low oxygen levels in the blood. This term has traditionally been applied to cyanosis as a result of: #Cyanotic heart disease, which is a category of congenital heart defect that results in low levels of oxygen in the blood. This can be caused by either reduced blood flow to the lungs or mixing of 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 there are other potential causes that can result in a baby's skin or mucous membranes turning<unk>  as a result, factors that cause hypoventilation, perfusion/ventilation differences in the lungs, poor cardiac output of oxygenated blood, etc. The<unk>  or cyanosis occurs when absolute amount of deoxygenated hemoglobin >3g/dL which is typically reflected with an O2 saturation of <85%. Both of these conditions cause cyanosis, or a bluish discoloration of skin or mucous membranes. Normally, oxygenated blood appears red and deoxygenated blood has more of a<unk>  appearance. In babies with low levels of oxygen or mixing of oxygenated and deoxygenated blood, the blood can have a<unk>  or purple color, causing cyanosis.
Blue baby syndrome
Gray baby syndrome
Michelin tire baby syndrome
Shaken baby syndrome
Omphalitis of newborn
Neonatal diabetes
Neonatal jaundice
Hemolytic disease of the newborn