IRCT20090704002117N2 IRCT 2019-08-07 Shahid Beheshti University of Medical Sciences Efficacy of steroid caudal epidural injection with or without ozone in lumbosacral canal stenosis under ultrasonography guidance Efficacy of steroid caudal epidural injection with or without ozone in lumbosacral canal stenosis under ultrasonography guidance 2019-04-25 anticipated 50 Complete https://irct.ir/trial/40925 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: The computer generates random numbers between 0 and 1, if the number is less than 0.500, the person enters the Corticosteroid recipient group, and if the number is greater than 0.500, it enters the Corticosteroid and ozone recipient group, Blinding description: The participants and outcome assessor were blind about the patients` group. N/A Lumbar canal stenosis. Intervention 1: Intervention group: Injection of 80 mg triamcinolone hexavalent with 4 ml of marquine 0.5% and 6 cc distilled water with simultaneous injection of 10 cc of ozone gas (O2 + O3) at a concentration of 10 mcq / cc. Intervention 2: Control group: Injection of 80 mg triamcinolone hexavalent with 4 ml of marquine 0.5% and 6 cc of distilled water. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is "There is no further information"