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Test Code BSAGD Hepatitis B Surface Antigen 

EHR Test Codes

  Test Code Test Name
Atlas BSAGD Hepatitis B Surface Ag, Serum
Cerner   Hepatitis B Surface Antigen 

 

Specimen Requirements

Preparation of Patient: 

None

 

Container Type: 

Gold Top 6mL SST Gel & Clot Activator Tube

Specimen Type:

Serum

 

Specimen Volume: 

2.5 mL Serum minimum .5 mL

 

Specimen Handling/Transport:

Separate serum  from cells within 2 hours of collection.

Transport ambient room temperature or refrigerated 2 - 8°C

 

Specimen Stability/Storage:

3 days ambient room temperature

5 days refrigerated 2-8°C

 

Specimen Rejection:

Gross Hemolysis

Gross Lipemia

Performing Laboratory

Munson Medical Center Laboratories

Chemistry Department

Priority, Frequency, & Turnaround

Priority:

Non-Emergent

 

Frequency:

Monday - Friday

 

Turnaround:

0 - 3 days

Methodology

Chemiluminometric Immunoassay

Reporting

Reference Range:

Negative

 

Result Interpretation:

  • Index <1.0 are considered NEGATIVE for HBsAg.
  • Index ≥140.0 are considered POSITIVE for HBsAg.
  • Index ≥1.0 and <140.0 are considered EQUIVOCAL and must be repeated in duplicate.  Samples which are Equivocal on 2 of the 3 replicates should be reported as POSITIVE.  Samples will be sent to Mayo for confirmation.

 

Critical Decision:

None

 

Clinical Significance

Hepatitis B surface antigen (HBsAg) is a protein found on the surface of the hepatitis B virus (HBV) and is detected during acute or chronic HBV infection. It is the first serologic marker to appear and can be detected as early as 1 week after exposure. 

 

The presence of HBsAg indicates that the person is infectious, except when it might be transiently positive within 30 days after a dose of HepB vaccine.

 

Different serologic markers or combinations of markers are used to identify different phases of HBV infection. They determine whether a patient has acute or chronic HBV infection, is immune to HBV as a result of prior infection or vaccination, or is susceptible to infection. Markers include:  HBsAg, Anti-HBs, Anti-HBc Total (IgM & IgM) and Anti-HBc IgM.  It is recommened that Hepatitis B Screening be performed in a triple panel; HBsAg, Anti-HBs, and Anti-HBc Total.

 

CPT Code(s)

87340

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