Rheumatoid Factor (RF)
Also known as: RA Latex, Turbidimetry, RF Titer, Rheumatoid Factor (RF)
Use
Help in the differential diagnosis and prognosis of arthritic disorders
Special Instructions
Not provided.
Limitations
Markedly lipemic or contaminated specimens may yield false-positive results. Other chronic inflammatory processes can also produce rheumatoid factors, which might be detected in synovial, pleural, and pericardial fluids but add little to serum test results. False-positives might also occur with assays using latex beads coated with human IgG.
Methodology
Immunoassay (Turbidimetry)
Biomarkers
Rheumatoid Factor
Analyte
LOINC Codes
- 11572-5 - Rheumatoid fact SerPl-aCnc
- 11572-5 - Rheumatoid fact SerPl-aCnc
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Serum
Volume
1 mL
Minimum Volume
0.5 mL
Container
Red-top tube, gel-barrier tube, lavender-top (EDTA) tube, or green-top (heparin) tube
Storage Instructions
Maintain specimen at room temperature.
Causes for Rejection
Hemolysis; lipemia
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 14 days |
| Frozen | 14 days |
Other tests from different labs that may be relevant