Test Code RASCR Rheumatoid Factor, QL LAB1195
Test Method
Qualitative Latex Agglutination; Sure-Vue
Specimen Requirement
1 mL serum is required.
Additional Specimen Collection Information
Collect blood in a red-top or SST (serum
gel tube).
Serum should be separated from contact with the cells within 2
hours of collection. Refrigerate the specimen if unable to
assay
within 8 hours of collection. Samples with >2+ lipemia must
be
cleared prior to analysis. Hemolysis is not acceptable.
Reference Values
Negative
Performance
Testing is performed Monday through Sunday.
Typically completed within 4 hours after the specimen
arrives at the testing site.
Useful For
Screening for rheumatoid arthritis
LOINC Code Information
33910-1 Rheumatoid Factor [Presence] In Serum
CPT Code Information
86430 Additional Diagnostic Immunology Testing:
Rheumatoid
factor; qualitative
Testing Algorhithm
A quantitative test is referred to St. Luke's Laboratory on
all positive qualitative tests. See rheumatoid factor
quantitative.