Rheumatoid Factor
| Order Code: | RF |
| Epic Lab Code: | LAB206 |
| Order Form: | A-1a General Lab or Epic Req |
Chemistry
6240 RCP
356-3527
6240 RCP
356-3527
Specimen:
Plasma
Collection Medium:
 |
| Plasma Separator Tube |
Alternate
Collection Media:
Call laboratory for additional acceptable specimen collection containers.
Minimum:
3 mL; whole blood in light green top tube or ONE microtainer.
Testing Schedule:
24 hrs/day, 7 days a week, including holidays.
Analytic Time:
1 hour (upon receipt in laboratory)
Reference Range:
<14 IU/mL
Test
Limitations:
Criterion: Recovery within plus or minus 10% of initial value.
Icterus: No significant interference up to an I index of 60
(approximate conjugated and unconjugated bilirubin concentration:
60 mg/dL or 1026 umol/l).
Hemolysis: No significant interference up to an H index of 1000
(approximate hemoglobin concentration: 1000 mg/dL or 621 umol/l).
Lipemia (Intralipid): No significant interference up to an L index of
500.
There is poor correlation between turbidity and triglycerides
concentration.
No high-dose hook effect up to RF activities of 6000 IU/mL.
Thirty one commonly used pharmaceuticals were tested in vitro. No
interference with the assay was found.
Reference:
Glick MR, Ryder KW, Jackson SA. Graphical Comparisons of Interferences
in Clinical Chemistry Instrumentation. Clin Chem 1986;32:470-474.
Methodology:
Immunoturbidimetric Assay
CPT Code:
86431
See also:
Cryoglobulin, Serum
Cryoglobulin, Serum