Patient's question:
The baby was hospitalized for jaundice at 38 days and underwent blue light treatment for 8 hours. After being observed in the hospital for one day, the baby was discharged. However, after returning home, the baby refused to breastfeed and seemed lethargic. On the second day after discharge, the baby vomited three times, with yellow vomit. What could be the reason?Doctor's answer:
Analysis of the condition: Neonatal jaundice refers to the yellow discoloration of the skin, sclera, and mucous membranes that occurs during the neonatal period, also known as neonatal hyperbilirubinemia. Its etiology is specific and complex, and severe cases can lead to bilirubin encephalopathy (kernicterus), often resulting in death and severe sequelae. Neonatal jaundice is generally divided into two major categories: physiological jaundice and pathological jaundice. Physiological jaundice is a normal physiological phenomenon. Due to the metabolic characteristics of bilirubin in newborns, approximately 60% of full-term infants and over 80% of preterm infants may develop jaundice 3-5 days after birth, but they are generally in good condition. In full-term infants, jaundice typically resolves within 14 days, while in preterm infants, it may persist for up to 3-4 weeks. Pathological jaundice, on the other hand, is abnormal and is generally associated with the following factors: ① bacterial infections and neonatal sepsis, as well as viral infections such as hepatitis A virus, hepatitis B virus, and cytomegalovirus; ② neonatal hemolytic disease; ③ congenital biliary atresia and biliary cysts; ④ breast milk jaundice, which usually appears 4-7 days after birth, peaks 2-3 weeks later, and the bilirubin level typically declines within 1-3 days after stopping breastfeeding. If there is no significant decline after 3 days, breast milk jaundice can be ruled out; ⑤ other factors such as genetic diseases and drug-induced jaundice. Neonatal jaundice should be considered pathological if any of the following conditions are present: early onset (appearing within 24 hours after birth); severe degree or rapid progression; prolonged duration (more than 2 weeks in full-term infants, more than 4 weeks in preterm infants); reappearance after resolution. Pathological jaundice caused by any reason should be treated by identifying the underlying cause. This is particularly crucial for preterm infants within the first week and for those with severe hypoxia, acidosis, intracranial lesions, or severe infections, who must receive prompt and active treatment to avoid adverse outcomes.