How to Use Newborn Jaundice Calculator
Newborn Jaundice Calculator is built to compare newborn total serum bilirubin with simplified hour-specific thresholds adjusted for gestational age and risk factors. Focus first on the inputs that directly drive the calculation:
- Enter the core measurement — Enter age after birth in hours, because bilirubin thresholds change rapidly in the first days.
- Check units and options — Enter total serum bilirubin in mg/dL.
- Read the primary result — Enter gestational age and whether prematurity or other risk factors are present.
- Review supporting values — Read the risk band together with phototherapy and exchange thresholds.
Formula & Theory - Newborn Jaundice Calculator
Newborn Jaundice Calculator uses this core formula:
adjusted_phototherapy_threshold = hour_specific_base_threshold - prematurity_adjustment - risk_factor_adjustment
exchange_threshold = adjusted_phototherapy_threshold + 8
risk_band = compare(TSB, adjusted_phototherapy_threshold, exchange_threshold)The Newborn Jaundice Calculator is a simplified educational threshold model. It reflects the idea that treatment decisions depend on both bilirubin concentration and age in hours, with lower thresholds when gestational age or risk factors increase vulnerability.
It is not an official AAP nomogram implementation. Bilirubin units, albumin, hemolysis, neurotoxicity risk factors, feeding status, and local protocols must be reviewed clinically.
Before interpreting Newborn Jaundice Calculator, confirm age is in hours after birth and the bilirubin value is in mg/dL, not micromol/L.
Use Cases for Newborn Jaundice Calculator
Newborn Jaundice Calculator is most useful in these situations:
- Explaining why a 12 mg/dL bilirubin value means different things at different hours.
- Preparing for a newborn follow-up discussion.
- Teaching phototherapy threshold concepts.
- Flagging values that need urgent clinician review.