Objectives Authors report on the results of Yttrium-90 radiosynoviorthesis in chronic synovitis of the knee joint. Out of these 213 patients 122 suffered from rheumatoid arthritis, 17 ankylosing spondylitis,13 other seronegative spondylarthritis, 48 suffered from inflamed osteoarthritis, 1 hydrops articulorum intermitterns, l synovitis villonodularis, 11 from chronic traumatic synovitis.
Methods Evaulation was based on the criteria as described by Müller, Rau and Scütte the score system was developed by the authors.
Results In the first seven years excellent and good results were recorded in 71%. They achieved excellent as well as good results at 83% of patients with rheumatoid arthritis, at 50% of patients with ankylosing spondylitis and at 55% of patients with osteoarthritis. Seven years after radiosynoviorthesis 65% of patients did not need another punction.
Conclusion Radiosynoviorthesis is as effective method of treating chronic synovitis as surgical synovectomy. The treatment must be done in rheumatoid arthritis Steinbrocker stadium I-II, local stadium I-II.
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