Home
HelpTest Code HBSAG Hepatitis B Surface Antigen (HBsAg), LAB471
Performing Laboratory
St. Luke's Hospital Cedar Rapids
Specimen Requirements
Container/Tube:
Preferred: Gold-top serum gel tube or plain, red-top tube
Acceptable: Green-top (lithium heparin or sodium heparin) tube or lavender-top (EDTA) tube
Specimen Volume: 90 uL and dead space of serum or plasma
Stability: Store samples at 2 to 8°C for up to 14 days. Samples can be stored at 20-25 °C for 6 days. Samples on the analyzers should be analyzed within 2 hrs. Freeze samples, devoid of red blood cells, at or below -20°C for up to 6 months. Thoroughly mix thawed samples and centrifuge at 10,000 g for 2 minutes before using. Samples can be frozen 6 times
Note: This assay is affected by biotin interference.
Reference Values
Nonreactive
Reactive results are sent to Pathology Laboratory, UPH Des Moines
Day(s) Test Set Up
Monday-Sunday
Useful For
Hepatitis B surface antigen (HBsAg) is a distinctive serological marker of acute or chronic hepatitis B infection. HBsAg is the first antigen to appear following infection with hepatitis B virus and is generally detected 1 to 10 weeks before the onset of clinical symptoms. HBsAg assays are routinely used to diagnose suspected HBV infection and to monitor the status of infected individuals to determine whether the infection has resolved or the patient has become a chronic carrier of the virus.
Methodology
Sandwich Immunoassay Chemiluminometric
Test Classification and CPT Coding
87340
Report Available
Stat within 1 hr of receipt
Routine within 2 hrs of receipt