Abstract
Purpose: We wanted to investigate efficacy of percutaneous radiofrequency (RF) neurotomy of medial branch for management of chronic low back pain due to lumbar zygapophysial joint dysfunction. Materials and Methods: Thirteen patients who had unremitting chronic low back pain for more than 6 months and whose VAS scores were over 7 were selected on basis of double comparative nerve blocks. The patients consist of three males and 10 females, and their nean age was 67 years. Sensory stimulation was performed to detect the pathologic branchesthat were responsible for pain generation. RF neurotomy was performed using a lesion generator at 80 C for 90 seconds. The postoperative outcome was classified, depending on degree of pain reduction, as excellent (≥ 75%), good (50-75%), and poor (
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