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Feb 5, 2018

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100

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Clinical Hub,Tools & Resources,UWHC Lab Test Directory,Infectious Disease

Hepatitis B Surface Ag

Hepatitis B Surface Ag (HBSAG) Infectious Disease Lab Test

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

Clinical Information:

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.

Specimen: Blood

Collection Container: Red cap with yellow ring (SST)

Also Acceptable: Red top

Collection Volume: 4 mL

Pediatric Collection Volume: 3 mL

Stability Ambient:

24 hours

Stability Refridgerated:

6 days

Stability Frozen:

>6 days

Sample Analyzed: Serum

Testing Volume: 2 mL

Pediatric Testing Volume: 1.3 mL

Specimen Processing:

Centrifuge. If complete barrier is not formed, transfer cell-free serum to plastic vial. Refrigerate.

Specimen Transport:

Transport specimen to the laboratory. Transport with coolant pack if coming from clinic location.

Interpretation:

Reference Interval:  Nonreactive

 

Interpretive Guidelines:

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

Test Limitations:

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.

Additional Information:

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.