Bilirubin (Neonatal)

Overview
Department	Biochemistry
Test Code	PBB
Synonyms	SBR
Availability	Monday - Sunday, testing routinely available out of hours
Turnaround Time	1 – 2 hours
Stability – Add test
Specimen Requirements
Specimen
Preferred
Acceptable
Unacceptable	Samples not protected from light.
Specimen Transportation
Paediatric Requirements	600 µl Li-Hep Microtainer
Aliquot Requirements
Sample	Plasma
Preferred Volume
Minimum Volume	50 µL
Aliquot Transportation	Please protect sample from light
Clinical Information
Reference Intervals	Same day as DOB 0 - 50 umol/L 1 day 0 – 100 umol/L Consider investigation and treatment for bilirubin over 100 2 days 0 - 140 umol/L for bilirubin over 250 3 days 0 – 200 umol/L for bilirubin over 300 4 – 14 days 0 – 170 umol/L for bilirubin over 340
Test Method	Abbott Alinity c series analyser. Diazonium salt assay
Advanced Notice	Not required
Patient Preparation	Not required
Comments
Premature infants usually have higher levels.

Owner	Clair Crossley (Crossley1)
Last reviewed	30.01.2026
Next review	30.01.2027 (OK)