Test Directory

Rheumatoid Factor

Containers - Adult

AAXXAANoImage.jpg
Sarstedt Monovette Serum Gel Tube (Brown Cap)
Volume Range

​4.9mls

Additive per Container

​Clotting activator/gel

Containers - Child

AAXXAANoImage.jpg
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

RIE
51 Little France Crescent
Old Dalkeith Road
Edinburgh
EH16 4SA
Telephone: 0131 536 1000

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.