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Hepatitis B Surface Antigen, Quantitative, Monitoring (Not for Diagnosis)
Test Code94333
CPT Codes
87467
Preferred Specimen
2 mL serum
Minimum Volume
1 mL
Transport Container
Transport tube
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 hemolysis • Grossly lipemic • Samples other than serum
Methodology
Immunometric Immunoassay
Setup Schedule
Set up: Mon-Sat; Report available: 1-3 days
Reference Range
<0.05 IU/mL
Clinical Significance
Quantitative measurement of HBsAg may be used to confirm ongoing HBV replication and monitor responses to antiviral therapy. Published studies support the viewpoint that repeatedly low to undetectable HBsAg values are a good predictor of sustained viral clearance. This test should be used on individuals previously diagnosed with hepatitis B infection by qualitative HBsAg testing.
