Rheumatoid Factor: What It Is, Test Details & Normal Range
2024年1月18日 · A normal, healthy amount of rheumatoid factor is less than 20 units per milliliter (<20 U/mL). Your provider might also refer to your test as being negative or positive. A negative result means you have a normal amount of RF in your blood. Positive means you have high levels of rheumatoid factor.
RF Test: What is the Normal Range for a Rheumatoid Factor Test?
Doctors measure the level of rheumatoid factor by performing a blood test. A positive rheumatoid factor test means that the level of rheumatoid factor in the patient’s blood is considered to be high. Rheumatoid factor was first described in connection to rheumatoid arthritis in 1940.
Rheumatoid factor: Ranges, tests, and treatment - Medical News Today
2024年1月24日 · Rheumatoid factor (RF) levels above a normal range can indicate autoimmune conditions, such as rheumatoid arthritis (RA). Rheumatoid factor (RF) is an immune system protein that attacks...
Rheumatoid Factor: Test, Meaning, Levels, Results - MedicineNet
Rheumatoid factor is a blood test that helps to diagnose rheumatoid arthritis, lupus, and sarcoidosis. Elevated test results, or high levels, indicate severe disease. Learn about the normal range for rheumatoid factor.
Rheumatoid factor - Mayo Clinic
2023年8月26日 · A rheumatoid factor test measures the amount of rheumatoid factor in your blood. Rheumatoid factors are proteins made by your immune system that can attack healthy tissue in the body. High levels of rheumatoid factor in the blood are most often related to autoimmune diseases, such as rheumatoid arthritis and Sjogren syndrome.
Rheumatoid Factor: Test, Level Ranges and More - HealthCentral
2023年10月30日 · Rheumatoid factor is a protein found in your blood—an autoantibody that responds to inflammation caused by RA. While antibodies help protect us from foreign invaders,...
Rheumatoid Factor (RF) : Range, Positive test result, & chart
2021年12月20日 · The rheumatoid factor or RF test is mostly used to diagnose rheumatoid arthritis. The test measures the amount of RF in your blood. It can also be used to detect other diseases like autoimmune disorders , juvenile arthritis, cancer, and infections.
Understanding Rheumatoid Arthritis Lab Test Results - HSS
2020年9月10日 · Understanding lab test results used to monitor RA and its treatment can help patients better manage their Rheumatoid Arthritis.
Rheumatoid Factor (RF) Test and What It Means - Verywell Health
2024年11月12日 · Rheumatoid factor is an autoantibody produced by the immune system in people with rheumatoid arthritis. High levels of RF in your blood indicate that you may have an autoimmune disease such as RA or Sjögren's disease. However, not everyone who tests positive for RF has rheumatoid arthritis.
Rheumatoid Factor - StatPearls - NCBI Bookshelf
2023年7月24日 · Rheumatoid factors are antibodies with various isotypes and affinities, directed against the Fc portion of immunoglobulin G. The commonly mentioned rheumatoid factor is an IgM RF, although other immunoglobulin types, including IgG and IgA, are rarely found. [2]