Ordering Recommendation

Refer to aruplab.com/bodyfluids for clinical indications and interpretive information.

Mnemonic
RA-FL
Methodology

Quantitative Immunoturbidimetry

Performed

Sun-Sat

Reported

Within 24 hours

New York DOH Approval Status
Specimens from New York clients will be sent out to a New York DOH approved laboratory, if possible.
Specimen Required
Patient Preparation
Collect

CSF, Pericardial, Pleural, or Synovial fluid.

Specimen Preparation

Centrifuge to remove cellular material. Transfer 1 mL body fluid to an ARUP Standard Transport Tube. (Min: 0.5 mL)

Storage/Transport Temperature

Refrigerated.

Unacceptable Conditions

Specimen types other than those listed. Specimens too viscous to be aspirated by instrument.

Remarks

Specimen source must be provided.

Stability

Ambient: 24 hours; Refrigerated: 1 week; Frozen: 1 month (should not be thawed more than once)

Reference Interval
Interpretive Data

For information on body fluid reference ranges and/or interpretive guidance visit https://aruplab.com/bodyfluids/

Compliance Category

Laboratory Developed Test (LDT)

Note
Hotline History
N/A
CPT Codes

86431

Components
Component Test Code* Component Chart Name LOINC
2003348 Rheumatoid Factor, Body Fluid 30231-5
2013048 Rheumatoid Factor Fluid Source 31208-2
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please click the sidebar link to access the Interface Map.
Aliases
  • RF body fluids
Rheumatoid Factor, Body Fluid