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| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Hepatitis B Surface Antigen with Reflex to Confirmation
Test Code901484
CPT Codes
87340<br>Restricted Client Code
Preferred Specimen
2 mL serum
Minimum Volume
1 mL
Other Acceptable Specimens
Plasma collected in EDTA (lavender-top) tube
Instructions
Note: When only a single test, Hepatitis B surface antigen is ordered to diagnose Hepatitis B in a pregnant woman. Additional tests such as liver enzymes should be ordered to confirm the diagnosis
Transport Temperature
Room temperature
Specimen Stability
Room temperature: 7 days
Refrigerated: 14 days
Frozen: 30 days
Refrigerated: 14 days
Frozen: 30 days
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross lipemia, gross hemolysis, plasma collected in PPT potassium EDTA (white-top) tubes
Methodology
Immunoassay
Setup Schedule
Set up: Mon-Sat; Report available: 1-3 days
Reference Range
Non-reactive
Clinical Significance
Surface antigen usually appears in the serum after an incubation period of 1 to 6 months following exposure to Hepatitis B virus, and peaks shortly after an onset of symptoms. It typically disappears within 1 to 3 months. Persistence of Hepatitis B surface antigen for greater than 6 months is a prognostic indicator of chronic Hepatitis B infection
