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 with 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.