Comparison of the Effectiveness of Ultrasound-Guided Periradicular Injections in Patients With Lumbar Radicular Pain

This study aims to compare the effects of different ultrasound-guided periradicular injection solutions in patients with chronic unilateral radicular pain caused by a single-level lumbar disc herniation. Participants receive an ultrasound-guided periradicular injection containing lidocaine and dexamethasone, either alone or combined with 5% dextrose or 0.9% sodium chloride. The study evaluates whether adding dextrose or sodium chloride provides additional benefit in reducing pain and improving function and quality of life. Pain intensity, disability, quality of life, and analgesic use are assessed before treatment and during follow-up. The main hypothesis is that the addition of 5% dextrose or 0.9% sodium chloride may improve the clinical effectiveness of the injection compared with lidocaine and dexamethasone alone.