Test Directory
Rheumatoid Factor
Containers - Adult
Sarstedt Monovette Serum Gel Tube (Brown Cap)
|
Volume Range
4.9mls
Additive per Container
Clotting activator/gel |
Containers - Child
|
Sarstedt Monovette Serum Gel Tube (Brown Cap)
|
Volume Range
4.9ml
Additive per Container
Clotting activator/gel |
Reference ranges
Rheumatoid Factor Antibodies
Negative <3.5 IU/ml
Normal range 3.5-5.0 IU/ml
Positive >5 IU/ml
Laboratory Site
Old Dalkeith Road
Edinburgh
EH16 4SA
How to request
Trak, ICE, Clinical Immunology request form.
This test can only be requested by specified Rheumatology Consultants.
Please note there is a change in reference range for this assay. This assay is not accredited to ISO 15189.
Availability
Normal working hours 9am-5pm Mon-Fri.
Anticipated turnaround
21 Days
What happens if the result is positive or abnormal
Reviewed and authorised by Consultant Immunologist
General additional information
Diagnosis of seropositive rheumatoid arthritis, differential diagnosis of rheumatic disease.
High levels of RF may be seen in Rheumatoid Arthritis, Subacute Bacterial Endocarditis (SBE), Sjogrens syndrome, and other infections and autoimmune/inflammatory conditions. RF is of no use in monitoring disease activity in RA where C-Reactive protein levels should be used.