Bilirubin, total and conjugated
- Test Name:
- Bilirubin, total and conjugated
- Synonyms:
-
Bilirubin, direct
-
Ordering Information:
-
- Collection Device/Tube Type:
-
1. EDM Base Lab: 5 mL blood - GOLD SST (gel)
2. CGY DSC: 4.5 mL blood - MINT LIHEP PST (gel)
3. NOTE: The preferred tube type at each testing site is acceptable at the alternate site
- Collection Instructions:
- Neonatal bilirubin testing referred to Alberta Precision Laboratories
- Submission Requirements:
-
1 mL serum or lithium heparin plasma
* Protect from lightEdmonton/Central/North Zones:
• For patients of all ages, protect samples from light using standard protocols (e.g. cover with foil)Calgary/South Zones:
• For patients 5 month or younger, collections must be protected from light by using gold top amber colored microcollection tube or green top tube with amber sleeve cover - Handling/Storage Comments:
- South Zone Patient Service Centres and Rural South Zone Alberta Precision Laboratories sites referring to DynaLIFE Calgary DSC must refrigerate and protect samples from light post collection.
- Frequency of Testing:
-
Daily
- Reference Range:
-
Test
Age
Reference Range (umol/L)
Bilirubin, total
0 to < 30 days
No reference interval
≥ 30 days
< 20
Bilirubin, conjugated
All
< 7.0
- Critical Values:
-
Bilirubin, total:
0 to < 30 days: greater than 300 umol/LBilirubin, conjugated (EDM Base Lab only):
0 to < 1 month: greater than 18 umol/L - Comments:
-
NOTES:
For children, aged 7 days to 5 months, with a total or neonatal bilirubin result greater than 20 umol/L, direct (conjugated) bilirubin and percentage of direct (conjugated) bilirubin are reported
The following comment is appended to the results when the percentage of direct (conjugated) bilirubin is greater than or equal to 20%:
"In infants direct (conjugated) hyperbilirubinemia (the direct [conjugated] bilirubin fraction of bilirubin greater than or equal to 20% of the total or neonatal bilirubin) is pathologic. Prompt evaluation is necessary especially to assess for Biliary Atresia. Consider referral to pediatric gastroenterologist." - Last Reviewed:
- 03 May 2023
