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UW Health SMPH
American Family Children's Hospital

UW Hospital and Clinics Lab Test Directory

Test Name: Bilirubin, Direct

Test Code(s): DBIL

CPT Code(s): 82248

Methodology: Spectrophotometry

Days Performed: Daily, 24 hours.

Turnaround Time: Stat: 1 hour.
Routine: 4 hours.


Specimen Requirements

Specimen: Blood

Collection Container: Preferred: Green cap with yellow ring (PST)
Also Acceptable: Green top, Red cap with yellow ring (SST), Red top

Collection Volume: Preferred: 1 mL
Pediatrics: 0.4 mL

Sample Analyzed: Plasma or serum

Volume Required: Preferred: 0.5 mL
Pediatrics: 0.2 mL

Specimen Processing: Centrifuge.  If a complete barrier has not formed, transfer cell-free plasma/serum to plastic vial.  Protect from light.  Refrigerate.

Specimen Transport: Transport specimen to the laboratory. Transport with coolant pack if coming from outreach location.  Protect specimen from light by placing in brown paper bag.

Unacceptable Criteria: Moderately hemolyzed specimens are not acceptable.

Stability: Refrigerated: 5 days- must be protected from light
Frozen: 3 months - must be protected from light


Interpretation

Reference Interval:
 Age:  mg/dL
 0 days - 5 days:  0.0-0.6
 6 days and up:  0.0-0.3

conjugated bilirubin

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