Rheumatoid factor

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What you can expect

By Mayo Clinic staff

During a rheumatoid factor test, a small sample of blood is drawn from a vein in your arm. This typically takes just a few minutes. Your blood sample is sent to a laboratory for testing.

Results Why it's done
References
  1. Goodyear CS, et al. Rheumatoid factors and other autoantibodies in rheumatoid arthritis. In: Firestein GS, et al. Kelley's Textbook of Rheumatology. 8th ed. Philadelphia, Pa.: W.B. Saunders Elsevier; 2008. http://www.mdconsult.com/das/book/body/215187023-6/1040817228/1807/359.html#4-u1.0-B978-1-4160-3285-4..10051-8--s0010_1498. Accessed Aug. 18, 2010.
  2. Rheumatoid factor. Lab Tests Online. http://www.labtestsonline.org/understanding/analytes/rheumatoid/multiprint.html. Accessed Aug. 19, 2010.
  3. Shmerling RH. Origin and utility of measurement of rheumatoid factors. http://www.uptodate.com/home/index.html. Accessed Aug. 19, 2010.
MY00241 Oct. 21, 2010

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