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Test Name:
Rheumatoid Factor, Serum or Plasma
- SBMF No:
28019 - Performance Lab Name:
Immunology - Test Mnemonic:
RA - ABN:
Not required - CPT Code:
86431 - LOINC Code:
11572-5 - Also Known As:
RA
RF
Rheumatoid Arthritis Factor - Spec Type:
Serum or plasma - Spec Container:
Gold top (SST), Red top (serum), Lavender top (EDTA), or Green top (lithium heparin) tube - Pref Vol:
1.0 mL - Min Vol:
0.5 mL - Fasting:
No - Spec Collect:
Routine venipuncture - Spec Process:
Serum sample tubes, clot 30 minutes
All tubes, promptly centrifuge 15 minutes
Immediately transfer serum or plasma to separate plastic tube
Properly centrifuged gel barrier tube sample does not require transfer of serum to separate tube - Spec Store Transport:
Refrigerated - Spec Stability:
24 hours room temperature (20-30°C)
3 days refrigerated (2-8°C)
4 weeks frozen (-20°C) – Do not use frost-free units that undergo repeated freeze/thaw cycles - Methodology:
Immunoturbidimetric Assay - Use:
Quantitative determination of rheutamoid factors in human serum or plasma - Clinical Significance:
Refer to:
- Reference Range:
0-15 IU/L - Day Run:
Mon-Sat - Time Run:
8:00 am - Time Reported:
5:00 pm - Test Type:
IMMUNOLOGY
