Antiprotease 3 antibodies within the normal range or negative are considered normal.
Antiproteinase 3 antibodies are the hallmark antibody for vasculitis, especially granulomatous vasculitis and microarteritis, which are closely related to their disease activity.
Since the actual values of anti-proteinase 3 antibodies may vary from hospital to hospital due to differences in testing methods, the determination of whether anti-proteinase 3 antibodies are normal depends on whether the anti-proteinase 3 antibody test value is within the normal range or whether the test is negative for the antibody.
However, it should be noted that the single indicator of positive anti-proteinase 3 antibody is not diagnostic of vasculitis, and further diagnosis should be made under the guidance of a doctor after completing other related tests. Patients with abnormal anti-proteinase 3 antibodies are advised to go to the rheumatology and immunology departments of regular hospitals for detailed consultation.