HEPATITIS B SURFACE ANTIGEN W/REFL CONFIRM

"Clinical Significance
Hepatitis B Surface Antigen with Reflex Confirmation - 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 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.

Preferred Specimen(s)
2 mL serum

Alternative Specimen(s)
Plasma collected in: EDTA (lavender-top) tube

Minimum Volume
1 mL

Collection 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 Container
Serum separator tube (SST)

Transport Temperature
Room temperature

Specimen Stability
Room temperature: 7 days

Refrigerated: 14 days
Frozen: 30 days

Reject Criteria
Gross hemolysis • Grossly lipemic

Setup Schedule"

Includes
Positive samples will be confirmed based on the manufacturer's FDA approved recommendations at an additional charge (CPT code(s): 87341).

Methodology
Immunoassay (IA)

Reference Range(s)
Non-Reactive

Alternative Name(s)
Australian Antigen,HBsAg,Hep B