Hepatitis B Virus Surface Antigen

CERNER / EPIC MNEMONIC: HBS AG
POE DESCRIPTION: HEPATITIS B SURFACE ANTIGEN; HBS AG
CPT CODE: 87340
CDM NUMBER: 3481025
TEST INFORMATION: The test includes detection of Hepatitis B virus antigen.
DAYS PERFORMED:

Samples are accepted daily.

TURNAROUND TIME:

8 hours

CONTAINER TYPE:

Red top Vacutainer® tube or SST TM tube

SPECIMEN REQUIREMENTS: Blood (serum)
REJECTION CRITERIA: Excessive hemolysis, gross contamination of specimen, chylous serum, improper storage of specimen, inappropriate specimen container, insufficient specimen volume.
MINIMUM VOLUME: 5 mL blood (1 mL serum)
HANDLING INSTRUCTIONS: Specimen should be transported as soon as possible. When transportation is delayed, refrigerate.
REFERENCE RANGE: No Hepatitis B surface antigen detected
LIMITATIONS OF TEST: Patients who are negative for HBsAg may still have HBV hepatitis. In the convalescent stage, both HBsAg and anti-HBsAg may be negative. This is the "window" period when the only evidence of HBV infection may be anti-HB core.
METHODOLOGY: Enzyme immunoassay (EIA)
ADDITIONAL INFORMATION: The test is used to screen for HBsAg; detect the carrier state. The presence of HBsAg is the earliest indication of acute infection and can also be an indication of chronic infection. A patient with acute Hepatitis B virus infection can be HBsAg negative.
LAST UPDATED:

9-8-2014

TEST SYNONYM(S):HBsAg; Hepatitis B Antigen