Neonatal Bilirubin Risk Estimator
Plot a newborn's total serum bilirubin on the Bhutani nomogram to identify low, low-intermediate, high-intermediate, or high risk zones based on age in hours, with risk-tier follow-up guidance.
Use the Neonatal Bilirubin Risk Estimator
Newborn Details
Valid range: 12 – 168 hours
Risk factors: isoimmune hemolytic disease, G6PD deficiency, asphyxia, significant lethargy, temperature instability, sepsis.
Enter newborn details and press Assess Risk Zone to see the Bhutani nomogram result.
| Zone boundary | mg/dL | µmol/L |
|---|
This tool is for educational use only. Clinical decisions must be made by a licensed clinician incorporating the full clinical picture, institutional protocols, and current AAP guidelines.
Bhutani Nomogram — Hour-Specific Bilirubin Risk Zones
Blue dot = current measurement. Zone boundaries based on Bhutani et al., 1999 / AAP 2004 practice parameter.
Summary
Plot a newborn's total serum bilirubin on the Bhutani nomogram to identify low, low-intermediate, high-intermediate, or high risk zones based on age in hours, with risk-tier follow-up guidance.
How it works
- Enter the newborn's postnatal age in hours (12–168 h, i.e. days 0.5–7).
- Enter the total serum bilirubin (TSB) in mg/dL or µmol/L.
- Select the gestational age and clinical risk tier for tailored follow-up recommendations.
- The tool locates the TSB/age coordinate on the Bhutani nomogram and returns the risk zone.
- Guidance text explains next steps (reassurance, outpatient follow-up, or evaluate for phototherapy).
Use cases
- Assess discharge readiness for a 36-hour-old newborn with borderline jaundice.
- Determine whether a 72-hour TSB of 14 mg/dL in a 38-week infant warrants follow-up.
- Educate nursing staff on how postnatal age and gestational risk tiers affect follow-up and monitoring.
- Document risk classification in a clinical note for a jaundiced term newborn.