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Test Code LAB471 Hepatitis Bs Antigen (HBsAg), Serum

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Specimen Requirements

Specimen Type: Serum

Container/Tube: Red/Grey separator or gold separator tube
Specimen Volume: Full tube (Pediatric collection volume: 3.0 mL - minimum 2.0 mL)
Collection Information: Specimen with obvious microbial contamination is not acceptable.

Reference Values

Nonreactive (reported as reactive or nonreactive)

Interpretation depends on clinical setting. 

Literature Reference:

Package insert: Roche Diagnostics, Elecsys HBsAgII, 2023-07, V4.0

Package insert: Roche Diagnostics, Elecsys HBsAgII Auto Confirm, 2023-07, V2.0

Methodology

Electrochemiluminescence Immunoassay (ECLIA)

Testing Algorithm:

If HBsAg is repeatedly reactive, confirmatory testing by specific antibody neutralization will be performed, at an additional charge.

Literature Reference:

 

Package insert: Roche Diagnostics, Elecsys HBsAgII, 2023-07, V4.0

Package insert: Roche Diagnostics, Elecsys HBsAgII Auto Confirm, 2023-07, V2.0

 

Additional Information

For BJH Laboratory Use Only
Alternate Tube for Single test only, not for Acute Hepatitis Panel:

1 mint or dark green-top (lithium heparin or sodium heparin) tube

1 pink-top (K2EDTA) tube
Note: Performance has not been established with cord blood, neonatal specimen, cadaver specimen, heat-inactivated specimen, or body fluid other than serum or plasma such as saliva, urine, amniotic fluid, or pleural fluid.
Analyte Stability:

See Analyte Stability Chart under General Information for a complete list. 

Laboratory Processing Instructions:

Completed specimens are stored refrigerated for 5 days.

Test Classification and CPT Coding

Hepatitis Bs antigen ECLIA  87340
Hepatitis Bs antigen neutralization ECLIA (if appropriate)  87341

Specimen Transport Temperature

Ambient

Day(s) Test Set Up

Upon receipt

Turnaround Time:

Routine:  2-4 hours after receipt in laboratory

LOINC Code Information

Name LOINC Code
Hepatitis Bs Antigen 5195-3
Hepatitis Bs Antigen, Confirmation 70154-0