Neonatal Hyperbilirubinemia Calculator

Neonatal Hyperbilirubinemia Calculator for Pediatrics. TSB at or above the entered exchange threshold prompts urgent specialist-care wording. Values reaching exchange minus two meet the escalation comparison, and values reaching the phototherapy threshold meet that comparison. A below-threshold result does not determine safe discharge or follow-up timing.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

This is a verified-threshold comparison, not an automatic AAP curve lookup. The user records postnatal age, completed gestational weeks and additional neurotoxicity-risk context, then supplies clinician-verified phototherapy and exchange thresholds from an authorized AAP 2022 resource. The calculator compares total serum bilirubin with those values and computes escalation as exchange threshold minus 2 mg/dL.

When to use this calculator

Use only for an infant born at least 35 weeks when the entered thresholds have been checked for the exact age and clinical context. The form supports ages zero through 336 hours. Age and risk responses document context; they do not generate or verify the thresholds.

Inputs used

  • Postnatal age (hours)
  • Completed gestational weeks at birth
  • Additional neurotoxicity risk factors beyond gestational age?
  • Both thresholds verified for this exact age, gestation and clinical risk context?
  • Total serum bilirubin (mg/dL)
  • Verified phototherapy threshold (mg/dL)
  • Verified exchange threshold (mg/dL)

Clinical interpretation

TSB at or above the entered exchange threshold prompts urgent specialist-care wording. Values reaching exchange minus two meet the escalation comparison, and values reaching the phototherapy threshold meet that comparison. A below-threshold result does not determine safe discharge or follow-up timing.

Worked example

For arithmetic only, suppose verified thresholds are 16 mg/dL for phototherapy and 24 mg/dL for exchange, with TSB 14.5 mg/dL. The gaps are 1.5 and 9.5 mg/dL, and the escalation threshold is 22 mg/dL. The equivalent TSB is 247.95 umol/L. These hypothetical thresholds are not an age-specific recommendation.

Limitations and safety notes

The tool does not reproduce AAP curves, infer a Bhutani risk zone, assess a bilirubin trend or choose thresholds after prior phototherapy. Use total serum bilirubin without subtracting direct bilirubin. Incorrect externally supplied thresholds remain a material limitation despite unit and ordering checks.

Frequently asked questions

Does age 48 hours automatically select a threshold?

No. The clinician supplies verified thresholds for that infant; age is recorded as context.

What is the escalation threshold?

In the cited AAP framework it is 2 mg/dL below the appropriate exchange-transfusion threshold.

Can a below-threshold result authorize discharge?

No. Follow-up depends on clinical context, trajectory, feeding, prior treatment and the relevant guideline pathway.

References

  • AAP2022 population and threshold comparison; escalation2mg/dL below exchange; no proprietary threshold curves copied. https://publications.aap.org/pediatrics/article-abstract/150/3/e2022058859/188726
  • AAP implementation FAQ: age, gestation and additional neurotoxicity risk affect threshold selection. https://www.aap.org/en/patient-care/hyperbilirubinemia/frequently-asked-questions-about-the-2022-aap-guideline-on-the-management-of-hyperbilirubinemia/

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 9, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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