Management of Neonatal Jaundice

Pathophysiology and Clinical Significance

Bilirubin encephalopathy describes clinical central nervous system findings caused by bilirubin toxicity to the basal ganglia and brainstem nuclei 2
Kernicterus, originally a pathologic diagnosis characterized by bilirubin staining of the brainstem nuclei and cerebellum, is now used interchangeably with both acute and chronic findings of bilirubin encephalopathy 2

Promote and support successful breastfeeding with 8-12 feedings per day for the first several days 2
Avoid routine supplementation of nondehydrated breastfed infants with water or dextrose water, as it will not prevent hyperbilirubinemia 3
Perform prenatal testing of all pregnant women for ABO and Rh(D) blood types and screen for unusual isoimmune antibodies 3
Perform systematic assessment during the neonatal period for risk of developing severe hyperbilirubinemia 3
If mother has not had prenatal blood grouping or is Rh-negative, obtain direct antibody test (Coombs' test), blood type, and Rh(D) type on infant's cord blood 3

Monitor all infants routinely for jaundice whenever vital signs are measured, but no less than every 8-12 hours 3
Perform transcutaneous bilirubin (TcB) and/or total serum bilirubin (TSB) measurement on every infant jaundiced in the first 24 hours after birth 3
Plot bilirubin measurements on hour-specific nomograms to assess risk and response to treatment 4
Investigate the cause of jaundice in infants receiving phototherapy or whose TSB level is rising rapidly 3
For sick infants and those jaundiced at or beyond 3 weeks, measure total and direct/conjugated bilirubin to identify cholestasis 3
Check newborn thyroid and galactosemia screen results in infants with prolonged jaundice 3

Initiate phototherapy based on TSB levels, gestational age, and risk factors using appropriate nomograms 4
Use special blue fluorescent tubes or LED lights that deliver irradiance of >30 mW/cm²/nm for intensive phototherapy 4
Expect a decrease of more than 2 mg/dL (34 μmol/L) in serum bilirubin concentration within 4-6 hours of initiating effective phototherapy 5
Change infant's posture every 2-3 hours to maximize area exposed to light 5
Avoid physical obstruction of light by equipment, large diapers, head covers, electrode patches, etc. 5
Consider exchange transfusion if TSB is in the intensive phototherapy range and phototherapy does not promptly lower the TSB 6
Do not subtract direct serum bilirubin from the TSB concentration when making decisions about exchange transfusions 6

Provide early and focused follow-up based on risk assessment 2
After discharge, follow-up within 24-48 hours to reassess bilirubin levels and monitor for signs of worsening jaundice 4
Consider outpatient phototherapy if TSB levels remain elevated but below exchange transfusion threshold 4
Educate parents about signs of worsening jaundice and when to seek immediate medical attention 4
Monitor the effectiveness of phototherapy with serial bilirubin measurements, with frequency based on clinical judgment 5

Early onset jaundice (within first 24 hours) suggests hemolytic disease and is a risk factor for severe hyperbilirubinemia 4
Late preterm infants are at higher risk for developing severe hyperbilirubinemia and require closer monitoring 4
Assess hydration status and consider supplemental fluids if dehydration is present or oral intake is inadequate 4