Test directory: Rheumatoid Factor

Ordering Code 426
Test Name Rheumatoid Factor
Alias RF
RA
Rheumatoid Arthritis
Preferred Specimen Serum
Preferred Container SST (Gold)
Other Specimen/Container Plasma in Lithium Heparin (Green),
Serum in Plain (Red)
Optimum Volume 0.5 mL
Transport Requirements Oahu: Ambient
Airline: Refrigerated
Send frozen if transport time > 3 days.
Specimen Stability Ambient: 24 Hours
Refrigerated: 3 Days
Frozen: 4 Weeks
Rejection Criteria Frozen, Specimen older than stability limits, Grossly hemolyzed, Insufficient quantity
Avail. Stat NO
Analytic Time 1 Day
Methodology Immunoturbidimetric

Reference range(s)

Component Age Male Norm Male Critical Low Male Critical High Female Norm Female Critical High Female Critical Low Units Add'l info
Rheumatoid Factor ALL < 14 < 14 IU/mL