RAMBAM 021: Safety and Initial Feasibility of the Neurolyser XR for the Treatment of Chronic Low Back Pain

Inclusion Criteria: Adult male and females \>55 years of age legally able and willing to participate in the study and come for follow-up visits Able and willing to fill the research questionnaires and to communicate with investigator and research team Patient with bilateral or unilateral low back pain of \> 6 months duration Patients whose back pain is alleviated by recumbency or comfortable sitting position Patients presenting with a) a positive (\>70% pain relief) to a previous, single or double, L1 to L5 lumbar medial branch block (within the last 12 months) and / or b) with a positive (\>70% pain relief lasting more than 6 months) to a previous lumbar facet thermal radiofrequency denervation. Average pain score of 6 or higher in the last month, (on 0-10 scale). Exclusion Criteria: Pregnant or breastfeeding patient Patients younger than 55 or older than 85 years Patients presenting with neurological deficits (including lumbosacral radiculopathy but not solitary radicular pain). Patients with history of lumbosacral spine surgery excluding previous lumbar radiofrequency neurotomy Patients who have had lumbar radiofrequency neurotomy in the past 6 months Patients with the presence of metal hardware or other foreign objects at the lumbosacral spine Patients with history of lumbar spine pathology that may increase procedural risk and / or influence symptoms and / or generate unrelated adverse event, (per the discretion of the study PI) Patients unable to understand and com…