In this general review article on the treatment of patients with psoriatic arthritis with magnetic fields, the authors state that an alternating low-frequency magnetic field (30-40 mT) from such generators as “Polius-1” and “Polius-101” improves the clinical state of afflicted joints. Such treatments are normally carried out for 30 minutes per day over a period of 15 to 20 days.

V.D. Grigor’eva, et al., “Therapeutic Use of Physical Factors in Complex Therapy of Patients with Psoriatic Arthritis,” Vopr Kurortol Fizioter Lech Fiz Kult, (6), 1995, p. 48-51.