Hepatitis B Surface Antigen
| Sunquest Code: | HBSAG | ||
| Epic Code: | LAB471 | Epic Name: | Hepatitis B Surface Antigen |
| Synonyms: | HBSAG; Hep B; HEPB | ||
| Methodology: | Chemiluminescent immunoassay | ||
| Test Includes: | If a reactive result repeats as reactive, a confirmation test is performed and charged. A bill only code will be added: HBSAGC. | ||
| Turnaround Time: | Performed Mon-Fri; results are reported the same day; positive results are reported within 3 days. | ||
| Special Instructions: | A cadaveric specimen from autopsy may be run for HBsAg at the request of the pathologist performing the autopsy and with the approval of the IDDL Medical Director on call. No cadaveric specimen from autopsy will be processed for organ donation. | ||
Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 2 mL |
| Minimum\Peds Volume: | 0.6 mL |
| Container: | Red or gold (gel) (Green (lithium heparin, gel), Green (sodium heparin, no gel), Purple (EDTA), Red (no gel)) |
| Collection Instructions: | Serum is preferred. EDTA or heparinized plasma will be accepted. Serum is the only acceptable sample for neonates. |
| Causes for Rejection: | Gross hemolysis, turbidity |
Processing and Shipping
| Specimen Processing: | Within 2 hours of collection, centrifuge and aliquot 0.6 mL, 0.3 mL minimum. |
| Shipping Instructions: | Ship at refrigerated or frozen temperature. |
| Stability: | After separation from cells: Up to 6 days refrigerated. Freeze aliquot sample if stored more than 6 days. |
| Test Performed at or Referral Lab | Specialty Core (UMMC-East Bank) |
Interpretive
| Reference Range: | Non-reactive |
| Use: | The presence of hepatitis B antigen is associated with acute or chronic infection. |
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