Clinical Research Directory

Inclusion Criteria: * Chronic knee pain with pain intensity of at least 4 out 10 on the VAS on most or all days for more than 3 months * Patients of either sex with primary osteoarthritis of one or both knees fulfilling diagnostic criteria for osteoarthritis knee laid down by American College of Rheumatology. * Patients also had to have a Kellgren-Lawrence (radiologic criterion) score of at least 2 * Pain resistant to conventional therapy including NSAIDs, opioids, muscle relaxants, oral steroids, physical therapy, and intra-articular injection therapy. Exclusion Criteria: * The patients with secondary osteoarthritis of knees * Associated systemic arthropathies, e.g. rheumatoid arthritis and gout * Previous radiofrequency ablation treatment for similar symptoms. * Intra-articular knee corticosteroid or hyaluronic acid injection in the past 3 months. * Active systemic or local infections at the site of proposed needle and electrode placement. * Coagulopathy or other bleeding disorder * Cognitive deficit. * Unstable medical or psychiatric illness. * Previous knee joint replacement surgery * Patients missing two or more appointments consecutively were excluded from the study