This test detects the types of systemic vasculitis which is an autoimmune disease. Autoimmune diseases are caused due to inflammation of blood vessels or organ failure or tissue damage. This blood test measures the total amount of autoantibodies present in the blood.
Try to avoid to taking any ongoing medications before going for the test. Inform your doctor about any drugs taken by you if there is any.
After the Anti Neutrophilic Cytoplasmic Antibody test, your doctor might prescribe you other tests as well depending on the result. It is to check if any other organ of your body is affected due to systemic vasculitis.