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Test Code LAB52 Bilirubin, Direct, Plasma or Serum

Reporting Title

Bilirubin, Direct

Methodology

Roche Diagnostics, Jendrassik-Grof   RMH, GMC,DH, DMH, GMH, WECC, PMC, GCMH, BH, OBH, MGH, MH, HMH, SH

Note:  See LAB50 “Bilirubin, Total, Plasma or Serum” for total bilirubin with reflex to direct bilirubin.

Bilirubin is formed by the reticuloendothelial system during the normal and abnormal destruction of red cells. Testing for bilirubin is useful in the diagnosis of liver disease and hemolytic anemia.

Performing Laboratory

OhioHealth Laboratory Services-RMH, GMC, DH, DMH, MGH, GMH, HMH, WECC, PMC, OBH MH, SH,GCMH, BH Core Laboratories

Specimen Requirements

Collection Instructions:

1. Serum and Plasma gel tubes should be centrifuged within 2 hours of collection.

2. Red-top tubes should be centrifuged and aliquoted within 2 hours of collection.

 

Submit only 1 of the following specimens:

 

Preferred:

Serum

Draw blood in a gold-top or a speckled-top serum gel tube(s). Spin down and send 1 mL of serum refrigerated. 

Note:  1. Plain, red-top tube(s) is also acceptable.

2. Indicate serum on request form.

3. Label specimen appropriately (serum).

 

Alternate: 

Plasma

Draw blood in a mint green-top (heparin) gel tube(s). Spin down and send 1 mL of heparinized plasma refrigerated. Protect specimen from light.

Note:  1. Indicate plasma on request form.

2. Label specimen appropriately (plasma).

Specimen Stability Information

Specimen Type Temperature Time
Serum or plasma Refrigerated 7 days
  Ambient  2 days
  Frozen  6 months

PROTECT FROM LIGHT

Specimen Transport Temperature

Refrigerate/Ambient NO/Frozen NO

Reference Values

0-22 days:  0.0-1.5 mg/dL

≥23 days:  0.0-0.40 mg/dL

Day(s) Test Set Up

Monday through Sunday; Continuously

Test Classification and CPT Coding

82248