Rheumatoid Factor RA Factor is a blood test that checks the rheumatoid in your blood, Rheumatoid factor is a protein that is made by the immune system. This test also helps to tell the difference between rheumatoid arthritis and other types of arthritis, such as Anti-nuclear antibody (ANA), Anti CC Protein, ESR, and C C-reactive protein (CRP).
Antibodies directed against the Fc fragment of immunoglobulin G (IgG) are called rheumatoid factors. Your immune system makes proteins called antibodies that also attack the germs and kill them which could make you sick. Usually, rheumatoid factors are antibodies, and by mistake sometimes he attacks the healthy cells and tissues in your body. When it works you have an immune disorder.
Is This Test Have Other Name
Rheumatoid Factor, RA Factor, RAF, RA Blood
Related Tests:
- Anti-nuclear antibody (ANA)
- Anti-CCP Antibody (Anti CCP)
- C Reactive Protein (CRP)
- Erythrocyte Sedimentation Rate (ESR)
How The test Performed
A Blood Sample Needed.
Why The Test Performed
The rheumatoid Factor test is used to help diagnose rheumatoid arthritis and autoimmune disorders. When you have swelling, pain, or symptoms of arthritis your doctor may advise an RA Factor Test. This test is only for Rheumatoid arthritis, and can’t diagnose any health problems.
Why Need This Test
You need an RAF test if you have symptoms of rheumatoid arthritis. Symptoms of rheumatoid arthritis are
- Fever
- Swelling
- Joint pain
- Tenderness
- The warmth of the joint
- Joint stiffness that lasts longer than 30 minutes
- Fatigue
- Occasional low fevers
- Loss of appetite
- Problems outside of the joints may include dry eyes or mouth
- Firm lumps under the skin
- Anemia
High level Of Rheumatoid Arthritis is,
- Autoimmune disorder
- Scleroderma
- Sjogren syndrome
- Lupus
- Juvenile idiopathic arthritis in children and teens
Chronic infections
Certain types of cancer, including leukemia
Hepatitis C (liver)
Tuberculosis (mostly affects the lungs)
Endocarditis (heart)
What Does the result Means
The RA factor normal range is below 6.0 IU/ml, But many labs use different types of kits Hence their normal value may change. A positive test result of Rheumatoid arthritis indicates that there is a high level of Rheumatoid Factor detected in your blood. And you have rheumatoid diseases. A high level of Rheumatoid Factor in your blood means you have autoimmune diseases. But many other diseases and condition can raise the Rheumatoid Factor level, Including:
- Cancer
- Chronic infections
- Inflammatory lung diseases, such as sarcoidosis
- Mixed connective tissue disease
- Sjogren’s syndrome
- Systemic lupus erythematosus
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