Rheumatoid Factor

Alternative Names/Synonyms	RF
Laboratory	Core Laboratory & Transfusion Medicine
Sub-section	Biochemistry
Specimen Type	Blood
Test Code	RFS, RFP

Clinical Significance (If applicable)

Assisting in the diagnosis of rheumatoid arthriti.

Serum, Plasma

0.5 mL

Serum (Gold SST)
Plasma (Light Green PST)
Collection Containers – Tube Types

4.5 mL

Room Temperature: 24 hours

Fridge: 3 days @ 2-8°C

Freezer: 4 weeks @ -20°C

Roche cobas c 502, immunoturbidimetric

24 hours a day, 7 days a week

1 hour

3 hours

< 14 IU/mL
In case of discrepancies, always interpret results using reference ranges as stated on laboratory reports and/or electronic patient chart.

416-586-4800 extension 4688