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Test Code 8088 Bilirubin (Direct)

Important Note

Hemolysis will invalidate the direct bilirubin result on newborns. 

Available individually or as part of a Hepatic Panel. 

Purpose

Evaluate liver and biliary disease. Increased direct bilirubin occurs with biliary diseases, including both intrahepatic and extrahepatic lesions. Hepatocellular causes of elevation include hepatitis, cirrhosis, and advanced neoplastic states. Increased with cholestatic drug reactions, Dubin-Johnson syndrome, and Rotor syndrome. In the latter two syndromes, the level is usually <5 mg/dL.

 

Performing Laboratory

Copley Hospital

 

Methodology

Bichromatic Endpoint

 

Specimen Requirements

Specimen Type: Blood (Plasma or Serum)

Preferred: Light-Green Top

Acceptable: Gold Top

Specimen Volume: Full Tube

Specimen Minimum Volume: 2 mL

 

Collection Instructions:

1. Label specimen with patient’s full name, date of birth,

    date & time of collection, and person collecting.

2. If delay in specimen transport > 1 hour, centrifuge tube.

3. Refrigerate specimen during transport.

 

Reference Values

Normal: 0.0 - 0.5 mg / dL

 

Stability

Refrigerated: 7 Days (Protected from Light)

 

Day(s) Performed

Daily

Available STAT

Analytical Time: 1 Day

 

Aliases

Bilirubin

Bilirubin Direct

Direct Bilirubin

 

Test Classification & CPT Coding

82248