Results of this double-blind, placebo-controlled study indicated that treatment with two 30-minute sessions of noninvasive pulsed radio frequency therapy is effective in significantly decreasing the time required for edema reduction in patients suffering from lateral ankle sprains.

A.A. Pilla & L. Kloth, “Effect of Pulsed Radio Frequency Therapy on Edema in Ankle Sprains: A Multisite Double-Blind Clinical Study,” Second World Congress for Electricity and Magnetism in Biology and Medicine, 8-13 June 1997, Bologna, Italy, p. 300.