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Test Code RFIGM Rheumatoid Factor IgM

Additional Codes

Meditech Order: RFIGM

Panel Order:RAPANEL

Alias

RF QNT

Intended Use

EliA RF IgM is intended for the in vitro quantitative measurement of IgM rheumatoid factor in serum and plasma (Li-heparin, EDTA) to aid in the diagnosis of rheumatoid arthritis.  EliA RF IgM uses the EliA IgM method on the Phadia 250 instrument.

Performing Lab

Boone Health Laboratory

Collection Method

Venous Collection

Container

Gold Serum Tube

Instructions/Special Handling

None

Preferred Specimen

Gold SST Serum Tube

Red Serum

Acceptable Specimes

  • Plasma
    • Lithium Heparin
    • EDTA

Units

EliA U/mL

Reference Ranges

<3.5 Negative
>5.0 Positive
3.5-5.0 Equivoval (recommend retesting after 8-12 weeks)
>200 >200 EliA U/mL

 

Critical Values

N/A

Reasons for Rejection

Hemolysis no hemolysis
Icterus  
Lipemia no lipemia
Other Contaminated specimen, QNS, Improperly labeled, Improper specimen type

 

Specimen Stability

Ambient (15-25°C) 8 hours
Refrigerated (2-8°C) 14 days
Frozen (-20°C) 12months (only one freeze thaw cycle)

 

Performance Information

Days/Times Performed Monday, Wednesday and Friday
Expected Turn around Time 1-3 days
Methodology/Method Description EliA IgM

CPT Code(s)

86431