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Test Code N.BILI_DIRECT BILIRUBIN, DIRECT (CONJUGATED)

Important Note

Protect specimen from LIGHT

Direct exposure from sunlight can decrease bilirubin by 50% within 1 hour.

NO HEMOLYSIS

Methodology

Automated Chemistry Analyzer

Specimen Requirements

Specimen Type: Serum or Plasma
Container/Tube: SST or Lithium Heparin
Specimen Volume: 1 mL (minimum 0.5)
Collection Instructions: 

  1. Allow specimen to clot completely if a serum tube (SST) was used.
  2. Separate serum (SST) or plasma (Lithium Heparin) from cells within 24 hours and transport refrigerated. If red top tube is collected, separate serum from cells within 2 hours and place in separate plastic tube.
  3. Properly label tube with patient's name, DOB, requisition number and type of tube, i.e. LiHep or NaHep etc.

Specimen Rejection

1. Hemolysis

2. Gross lipemia

3. Unlabeled/mislabeled specimen

Maximum Laboratory Time

24 to 48 hours

Specimen Transport/Stability

Refrigerated: 24 hours on gel, 6 days poured off (light protected)

Test Classification and CPT Coding

82248

Day(s) Test Set Up

Daily

Reference Ranges

 

Bilirubin, Direct mg/dL
Newborn 0.10 - 0.50
1 mo 0.00 - 0.50

Critical  (newborn) :   REFER TO LH-W CRITICAL VALUES POLICY