Rheumatoid Factor

General

Synonym/Acronym:
RF, RA.

Rationale
To primarily assist in diagnosing rheumatoid arthritis.

Patient Preparation
There are no food, fluid, activity, or medication restrictions unless by medical direction.

Normal Findings
Method: Immunoturbidimetric for RF; enyzme-linked immunosorbent assay for 14-3-3 eta protein.

RF Less than 14 international units/mL
14-3-3 eta protein Less than 0.2 ng/mL
Elevated RF values may be detected in healthy adults 60 yr and older. RF is not useful in monitoring the effectiveness of treatment.


Critical Findings and Potential Interventions
N/A

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