Newborn jaundice

Patient's question:

Patient gender: Male
Main symptoms: Jaundice
Onset time: The tenth day
Laboratory test results: Jaundice

Doctor's answer:

Physiological jaundice is a normal physiological phenomenon. Due to the metabolic characteristics of bilirubin in newborns, about 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, neonatal sepsis, and 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 within 2-3 weeks, and the bilirubin level drops within 1-3 days after stopping breastfeeding. If there is no significant decrease after 3 days, breast milk jaundice can be ruled out; ⑤ Other factors such as genetic diseases and drug-induced jaundice.
In the early stages, it is important to feed the newborn as soon as possible to ensure the timely excretion of meconium. Meconium contains a significant amount of bilirubin, and if it is not fully excreted, bilirubin can be reabsorbed into the bloodstream through the newborn's unique hepatointestinal circulation, leading to increased jaundice. How can you determine if meconium has been fully excreted? The main indicator is the transition of meconium from black to yellow. Additionally, it is essential to provide the newborn with adequate fluids. The best way to assess whether the newborn is receiving sufficient fluids is to monitor their urine output. A normal newborn typically urinates 6-8 times a day. If the frequency is lower, it may indicate insufficient fluid intake, which is not conducive to bilirubin excretion. Ensuring adequate fluid intake can help reduce the severity of jaundice.
As the baby's liver function gradually matures, neonatal jaundice will gradually subside. However, if jaundice persists without improvement and shows signs of worsening, along with symptoms such as poor (spirit), increased crying, and weight loss, it should no longer be taken lightly. When a newborn exhibits any of the following conditions, pathological jaundice should be considered, and prompt treatment should be initiated: 1. Jaundice appears within 24 hours of birth; 2. The jaundice is severe and progresses rapidly, becoming significantly worse within a day; 3. The jaundice lasts for an extended period or reappears and worsens progressively: in full-term infants, it exceeds 2 weeks, and in preterm infants, it exceeds 4 weeks.