Pulsed Radiofrequency and Osteoarthritic Chronic Knee Pain

The purpose of this study is to investigate the efficacy and safety of pulsed radiofrequency of the saphenous nerve in the treatment of pain due to knee osteoarthritis (OA). The investigators will conduct real pulsed radiofrequency or sham, over the saphenous nerve during 4 separate sessions. The investigators will evaluate pain intensity, quality of life, function, and disability via clinical validated scales. The research question is whether pulsed radiofrequency can lessen knee pain and improve function and quality of life in patients with chronic knee pain due OA. It is hypothesized, that less knee pain and improved function, and quality of life after the pulsed radiofrequency sessions.