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Bilirubin Direct

Ordering Info & Methodology

Test Code

Cerner Synonyms


Bilirubin Conjugated, DBIL, Bilirubin, Direct, Direct Bilirubin

Turn Around Time


Analyzed within 4 hours of receipt, 24/7.

Vanadate Oxidation, Roche cobas c

Ordering Guide

If <365 days, sample will be automatically forwarded to Children's hospital (diazo method). Neonate min volume 0.1 mL.

Specimen Requirements

Sample Type

Collection Container

Alternate Collection Containers

Lithium Heparin Plasma

Light Green

Gold, Red

0.5 mL

24 hours

Add on stability
This is the length of time after sample collection that this analyte is stable. Test can be added to a previously collected sample if the time since collection is less than the add on stability time.

Minimum Volume

Add On Stability

Collection and Shipping Requirements

Refrigerate. Send on ice pack. Protect from light.

Reference Intervals

Female Reference Interval

Age Category
Reference Interval
0 y - <28 d
Not Established
≥ 28 d

Male Reference Interval

Age Category
Reference Interval
0 y - <28 d
Not Established
≥ 28 d
Additional Notes

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Measurement Uncertainty (MU)
Every laboratory value is an estimate of the true concentration of substance. MU is the 95% confidence interval around that estimate. 95% of the time, the true concentration will be within the range of the reported value ±MU. This value is based on analytical variability (precision) and does not reflect other factors such as sample collection and handling which may also affect the result.


Reported sodium = 140 mmol/L
Sodium MU = 1%
Expanded uncertainty = 140 mmol/L ± 1% or 140mmol/L ± 1.4 mmol/L
Interpretation - the true value of sodium in the sample is in the range 138.6-141.4 mmol/L, with 95% confidence.


Measurement Uncertainty



Direct bilirubin measurements may be falsely elevated by approximately 11% in samples with a therapeutic-level concentration of eltrombopag. Physicians should contact the laboratory regarding testing for patients on high-dose eltrombopag therapy.


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