Hepatitis B Virus Surface Antigen, Confirmation
Also known as: HBSAG CONF
Use
This test is used to confirm the presence of Hepatitis B surface antigen (HBsAg) in a patient's serum or plasma, indicating an acute or chronic hepatitis B infection. It is crucial for clinical diagnosis and management of hepatitis B infection, as it confirms ongoing infection and assists in determining the appropriate therapeutic and preventive measures. This assay is not intended for blood donor screening or screening for human cells, tissues, and cellular- and tissue-based products (HCT/P).
Special Instructions
Order this assay only when a specimen is repeatedly reactive for hepatitis B surface antigen. It should not be used for blood donor screening or associated reentry protocols. Specimen should be collected in a serum separator tube, lavender (EDTA), or pink (K2EDTA) tube and transported refrigerated.
Limitations
The test is not suitable for blood donor screening, associated reentry protocols, or for screening human cells, tissues, and cellular- and tissue-based products (HCT/P). False positive and negative results can occur; therefore, results should be interpreted in the context of clinical evidence and repeat testing might be necessary to clarify diagnosis if a result is not supported clinically.
FDA ApprovedNew York Approved
Methodology
Immunoassay (CLIA)
Biomarkers
LOINC Codes
- 65633-0
Result Turnaround Time
1-3 days
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
2.5 mL
Minimum Volume
1.5 mL
Container
ARUP standard transport tube
Collection Instructions
Collect in a serum separator tube. Also acceptable: Lavender (EDTA) or pink (K2EDTA). Separate serum or plasma from cells ASAP or within 2 hours of collection.
Storage Instructions
Refrigerated storage and transport. Avoid repeated freeze/thaw cycles.
Causes for Rejection
Heparinized plasma, specimens containing particulate material, heat-inactivated, severely hemolyzed, or lipemic specimens.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Unacceptable |
| Refrigerated | 1 week |
| Frozen | Indefinitely |