Efficacy of Greater Occipital Nerve Radiofrequency for Refractory Migraine Treatment

After identifying the GON with ultrasound guidance, a catheter needle (22-gauge 5 cm 5 mm active tip hybrid electrode) is inserted with an in-plane technique from lateral to medial.After visualizing the electrode tip placed close to the right or left GON, a sensory stimulation test is performed using an RF generator (URF-3AP Diros Tecnology Inc.). After the patient reports dysesthesia and a tingling sensation at the occipital area with less than 0.2 V, the PRF treatment is administered at 5 Hz and 5 milliseconds pulsed width for 360 seconds at 45 V under the constraint that the temperature of the electrode tips does not exceed 42°C