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HelpTest Code RF Rheumatoid Factor (RF)
Specimen Type
Plasma
Container/Tube
Li-Heparin Mint Green Top
Offsite Collection Instructions
1. Collect sample following standard collection methods
2. Within 2 hours of collection the sample must be spun and
aliquoted
3. Transport refrigerated (2 – 8C).
Turnaround Time
4 hours
Test Includes
N/A
Preferred Volume
0.5 mL
UCMC Collection Instructions
1. Collect sample following standard collection methods
2. Within 2 hours of collection the sample must be received in
Laboratory Service Center
3. Transport room temperature (15 – 25C).
STAT Turnaround Time
N/A
Test Usage
Measurements may be used as an aid in the diagnosis of
rheumatoid arthritis.
Critical Results
N/A
Test Limitations
Rheumatoid factors are also found in other inflammatory
rheumatic diseases and in various non-rheumatic diseases. They
are
also found in clinically healthy persons over 60 years of age.
Additional Information
N/A
Fee Code
30286431
Synonyms
N/A
Specimen Minimum Volume
0.2 mL
DAY(S) AND TIME(S) PERFORMED
24 hours, 7 days a week including holidays.
STAT DAY(S) AND TIME(S) PERFORMED
N/A
CPT
86431
Method Name
Immunoturbidimetric Assay
Reference Values
< 14 IU/mL
Reject Due To
Whole blood/unspun samples greater than 6 hours will be
rejected.
Included in Additional codes
N/A
Coverage Information
N/A
Stability: Room Temp
24 hours
Stability: Refrigerated
3 days
Stability: Frozen
4 weeks