The Efficacy of Ultrasound Guided Transcutaneous Pulsed Radiofrequency for Cervical Radiculopathy: a Randomized, Sham-controlled, Double-blind Pilot Study

participants will receive ultrasound guidance to localize the target cervical nerve root (e.g., C5-C7) before treatment. A high-frequency linear transducer will be used with the patient in a sitting position. Transcutaneous pulsed radiofrequency (TCPRF) will be applied using the StimOn™ Pain Relief System (GM2439, Gimer Medical Co., Ltd, Taiwan; FDA 510(k) No. K213802). The device delivers a 500-kHz symmetric biphasic sine wave at 2 Hz with a 25-ms pulse. Each session lasts 30 minutes, divided into two 15-minute phases, with treatment administered 3 times per week for 4 weeks (12 sessions in total).

participants will receive ultrasound guidance to localize the target cervical nerve root (e.g., C5-C7) before treatment. A high-frequency linear transducer will be used with the patient in a sitting position. Sham device will be applied. No active current will be delivered. Each session lasts 30 minutes, divided into two 15-minute phases, with treatment administered 3 times per week for 4 weeks (12 sessions in total).