Management of Hyperbilirubinemia in Infants
Diagnosis and Assessment
- The American Academy of Pediatrics recommends measuring total and direct bilirubin to rule out pathologic causes, particularly cholestatic jaundice from conditions like biliary atresia, in any infant who remains clinically jaundiced at 2 weeks of age 1
- Visual assessment alone is unreliable and can lead to dangerous errors, particularly in darkly pigmented infants, and total serum bilirubin (TSB) and direct/conjugated bilirubin should be measured immediately 1, 2
- A detailed feeding history, including adequacy of intake, weight change from birth, and pattern of voiding and stooling, should be obtained 1
Laboratory Workup
- The following tests should be obtained to identify underlying pathology: blood type and direct antibody test (Coombs) 4, complete blood count with differential and reticulocyte count (to assess for hemolysis) 5, serum albumin level 4, and G6PD level if ethnically indicated 3, 4
Treatment Thresholds
- The American Academy of Pediatrics recommends initiating intensive phototherapy if TSB ≥13-15 mg/dL, depending on risk factors 3, 4
- Intensive phototherapy should be used with special blue light in 430-490 nm spectrum with irradiance ≥30 μW/cm²/nm, and the light source should be positioned as close as safely possible to maximize irradiance 4
- Breastfeeding or bottle-feeding should be continued every 2-3 hours during treatment 3, 4
Monitoring Protocol
- If phototherapy is initiated, TSB should be repeated within 2-3 hours if TSB ≥25 mg/dL, within 3-4 hours if TSB 20-25 mg/dL, and within 4-6 hours if TSB <20 mg/dL 5
- TSB should be continued to be monitored every 4-6 hours until bilirubin shows a consistent downward trend 5
Exchange Transfusion Criteria
- Immediate exchange transfusion should be prepared for if TSB ≥25 mg/dL (428 μmol/L) despite intensive phototherapy, or if there are any signs of acute bilirubin encephalopathy, regardless of bilirubin level 3, 4, 5