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Test Code LAB471 Hepatitis Bs Antigen (HBsAg), Serum

Infectious

Performing Laboratory

Barnes-Jewish Hospital Laboratory

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

 

Specimen Requirements

Specimen Type: Serum

Container/Tube: Red/Grey separator or gold separator tube
Specimen Volume: Full tube
Collection Information: Specimen with obvious microbial contamination is not acceptable.

Day(s) Test Set Up

Upon receipt

Turnaround Time:

Routine:  2-4 hours after receipt in laboratory

Test Classification and CPT Coding

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

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

Specimen Transport Temperature

Ambient

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:

20 to 25°C: 6 days

2 to 8° C: 14 days

 -15 to -25° C stability: 180 days.

Avoid more than 6 freeze/thaw cycles. Repeated freeze/thaw cycles can cause analyte deterioration. 

Laboratory Processing Instructions:

Completed specimens are stored refrigerated for 5 days.

LOINC Code Information

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