RA Factor testing in synovial fluid can help confirm a diagnosis of rheumatoid arthritis or other autoimmune joint diseases.
When this test is required
RA Factor testing in synovial fluid is typically requested if a healthcare provider suspects joint inflammation due to rheumatoid arthritis or other autoimmune joint diseases.
What the Test Detects
The test is for RA Factor, an antibody that can be found in the synovial fluid of people with rheumatoid arthritis and some other autoimmune diseases.
Preparation for the Test
Test preparation will depend on the healthcare provider’s instructions and the location of the joint to be tested.
Sample Requirements
The sample required is synovial fluid, which is the fluid that lubricates the joint space.
Additional Notes
RA Factor testing in synovial fluid is not the only test used to diagnose rheumatoid arthritis. It is often used in conjunction with other tests, such as testing for anti-cyclic citrullinated peptide (anti-CCP) antibodies and imaging studies.
