Rheumatoid Factor
Preferred Collection Container:
Light Green (Lithium Heparin Plasma Separator Tube)
SST (Serum Separator)
Also Acceptable Collection Container:
Green No Gel (Lithium Heparin)
Red (No Additive)
Collection Information:
Collect blood in a Light Green (Lithium Heparin Plasma Separator Tube) or SST (Serum Separator). Green No Gel (Lithium Heparin) or Red (No Additive) are also acceptable.
Transport Information:
Centrifuge and aliquot 0.6 mL of plasma or serum into a plastic transport vial. Send refrigerated.
Minimum Sample Volume: 
0.2 mL plasma or serum (approximately 0.4 mL of whole blood based upon a normal patient hematocrit)
Remarks:
Remove serum/plasma from cells ASAP. EDTA plasma is acceptable but will not route in Sunquest information system.
Unacceptable Conditions:
Stability Comments:
Avoid freeze/thaw cycles.
Stability
Refrigerated Stability:
Frozen Stability:
3 months- thawed only once
Ambient Stability: