Name: Hepatitis B Surface Ag
Test Name: Hepatitis B Surface Ag
Health Link Test Code: HBSAG
LIS Test Code: HBSA
CPT Code(s): 87340
Methodology: Chemiluminescent Immunoassay
Detects surface antigen of Hepatitis B.
Days Performed: Daily, 24 hours.
In-Lab Turnaround Time: 4 hours.
Stat In-Lab Turnaround Time: Not available stat.
Collection Container: Red cap with yellow ring (SST)
Also Acceptable: Red top
Collection Volume: 4 mL
Pediatric Collection Volume: 3 mL
Sample Analyzed: Serum
Testing Volume: 2 mL
Pediatric Testing Volume: 1.3 mL
Centrifuge. If complete barrier is not formed, transfer cell-free serum to plastic vial. Refrigerate.
Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.
Reference Interval: Nonreactive
Nonreactive: If HBcAb and HBsAg are positive with a negative HBsAb, a Hepatitis B Core Ab, IgM is recommended. If HBsAb and HBsAg are negative with a positive HBcAb, then Hepatitis B Viral DNA testing may aid in the interpretation of results.
See Confirmatory Test: If HBcAb and HBsAg are positive with a negative HBsAb, a Hepatitis B Core Ab, IgM is recommended. If HBsAb and HBsAg are negative with a positive HBcAb, then Hepatitis B Viral DNA testing may aid in the interpretation of results.
Interpretation of Hepatitis B Test Result
Interpretation Type: Reference Interval
Results may be affected if patient has developed heterophilic antibodies due to exposure to animal based protein products.
The assay performance characteristics have not been established for cadaver specimens, heat inactivated specimens and body fluids other than serum.
This method is approved for diagnostic testing only. It is not approved for screening tissue donors that fall under FDA's HCT/P requirements.
All reactive specimens are tested by a neutralizing confirmatory assay.