| A B C D E F G H I J K L M N O P Q R S T U V W X Y Z # |
Rheumatioid Factor
Test CodeLAB206
Alias/See Also
Rheumatoid Arthritis Screening, RF, RA
CPT Codes
86431
Preferred Specimen
6 ml (3 ml minimum) SST (gold), no additive (red)
Minimum Volume
1 ml (0.5 ml minimum) serum
Instructions
After centrifugation, if not in gel barrier tube, pour off serum into an aliquot tube.
Transport Temperature
Room temp
Specimen Stability
Separated from cells: 8 days refrigerated, 24 hours room temp, 3 months frozen
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Hemolysis: >500mg/dL, lipemia: >1000mg/dL, bilirubin: >40mg/dL
Methodology
Quantitative Immunoturbidimetry
Setup Schedule
Mon- Sun
Reference Range
Reference Range: Adults 0-14 IU/mL
Clinical Significance
Higher titers of RF are more specific for the diagnosis of rheumatoid arthritis (RA) and are more common in
patients with rapidly progressive joint destruction. Higher titers for RF are also found in those patients with
extraarticular manifestations such as subcutaneous rheumatic nodules
patients with rapidly progressive joint destruction. Higher titers for RF are also found in those patients with
extraarticular manifestations such as subcutaneous rheumatic nodules
Performing Laboratory
Piedmont Athens Regional
