Alpha Medical Lab
Direct Bilirubin
Ordered Test Code:
DBIL
| Lab Test Component | Requirement |
|---|---|
| Test Name | Direct Bilirubin |
| Alpha’s Order Test Code | DBIL |
| Specimen Collection Tube | SST/1mL/Light protected |
| Collection Tube Handling | “Plasma from: Lithium heparin (green-top) tube Sodium heparin (green-top) tube Serum transferred to an amber transport vial” |
| Minimum Volume | 0.5mL |
| Transport Temperture | Refrigerated |
| Stability | “Refrigerated: 72 hours* Frozen: 90 days* * If protected from light” |
| Collection Instructions | Protect from light by wrapping a spun SST® in foil or transferring serum/plasma to an amber transport vial. Avoid hemolysis. |
Clinical Significance
Measurement of the levels of bilirubin is used in the diagnosis and treatment of liver, hemolytic, hematologic, and metabolic disorders, including hepatitis and gall bladder obstruction. The assessment of direct bilirubin is helpful in the differentiation of hepatic disorders. The increase in total bilirubin associated with obstructive jaundice is primarily due to the direct (conjugated) fraction. Both direct and indirect bilirubin are increased in the serum with hepatitis.
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