45 V vs 60 V Pulsed Radiofrequency of the Cervical Dorsal Root Ganglion for Cervical Radicular Pain

Inclusion Criteria: * Unilateral cervical radicular pain consistent with cervical disc herniation. * Pain intensity of ≥6 on the Numerical Rating Scale (NRS). * Radicular pain persisting for at least 3 months. * MRI evidence of lower cervical nerve root compression consistent with clinical findings. * Inadequate response to conservative treatment, including analgesic medications and physical therapy. * Completion of cervical dorsal root ganglion pulsed radiofrequency (PRF) treatment. Exclusion Criteria: * Bilateral upper extremity pain or predominant axial neck pain. * Cervical spinal stenosis, spondylolisthesis, cervical myelopathy, or other structural spinal disorders causing radicular pain. * Previous cervical spine surgery at the target level. * Cognitive impairment preventing reliable outcome assessment. * Active local or systemic infection. * Coagulopathy or inability to discontinue anticoagulant/antiplatelet therapy for the procedure. * Severe hepatic or renal failure. * Pregnancy. * Unstable psychiatric disorders. * Any condition that could interfere with completion of follow-up evaluations.