Hepatitis B Surface Ag (Quantitative)

This test is referred to another lab outside our network
This does not affect where samples are sent and where your results are issued.
Description: 
Samples sent to King's College Hospital (KCH) Liver Unit referral laboratory for quantification of Hepatitis B surface antigen in serum. This is performed only for patients undergoing interferon treatment for Hepatitis B infection. This assay is available routinely Mon to Fri.
Clinical details: 
Quantitative Hepatitis B surface antigen levels have been shown to be helpful in predicting the likelihood of a sustained response to interferon therapy. NICE guidance recommends monitoring quantitative surface antigen levels along with hepatitis B DNA levels at the start of interferon treatment and at weeks 12, 24 and 48 of treatment.
Synonyms or keywords: 
HBV, HepB, surface antigen
Units: 
International units per milliliter (IU/mL)
Sample type and Volume required: 
500 ul serum or 2.5 – 5ml Yellow Top Serum Separation Tube (SST) Clotted Blood (for serum). Note: If using Electronic Patient Record (EPR) please order "qHBsAg for IFN-treated HBV patients".
Turnaround time: 
14 working days
Storage and transport: 
Place labelled sample in a sealed sample bag and send to Central Specimen Reception (CSR). To prevent sample haemolysis please store samples in refrigerator if a delay in sending samples to CSR is unavoidable.
Contacts:
Infection Sciences Department at St Thomas' Hospital
020 7188 8008
St Thomas' Hospital
North Wing - 5th Floor
Westminster Bridge Road
London SE1 7EH
Core opening hours: Monday-Friday 0900-1730


For clinical advice or interpretation of results, please contact the laboratory in the first instance.

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Last updated: 28/11/2018