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Rheumatoid Factor
Test Code5085
Alias/See Also
RA
Preferred Specimen
One plasma separator tube. Also acceptable: green (sodium or lithium heparin), lavender (EDTA) or pink (K2EDTA).
Minimum Volume
0.5 mL serum or plasma at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.
Instructions
Fasting specimen preferred.
Transport Temperature
0.5 mL serum or plasma at 2-8°C. (Min: 0.5 mL) Submit specimen in an ARUP Standard Transport Tube.
Specimen Stability
After separation from cells: Ambient: 24 hours; Refrigerated: 1 week; Frozen: 2 weeks (should be thawed only once)
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolyzed specimens.
Methodology
Immunoturbidimetric
Setup Schedule
Sun-Sat
Report Available
Within 24 hours
Limitations
Allow serum to clot completely at room temperature before centrifuging.
