IRCT20240609062049N1 IRCT 2024-09-28 Shahid Beheshti University of Medical Sciences Effect of caudal volume injection on optic nerve sheath diameter Effect of caudal volume injecton on optic nerve sheath diameter in pateints with failed back surgery syndrome 2024-07-05 anticipated 46 Complete https://irct.ir/trial/77271 interventional Randomization: N/A, Blinding: Not blinded, Placebo: Not used, Assignment: Single, Purpose: Treatment. N/A Optic nerve sheath diameter. Intervention group: 30 ml of solution containing 1500 units of hyaluronidase made by WOCKHARDT.UK in a volume of 10 ml within 2 minutes, 10 ml of rovacaine 0.2% made by Varian pharmed along with 40 mg of methylprednisolone made by Iranhormone pharmaceutical co. within 2 minutes and then From 20 minutes, 10 ml of 5% sodium chloride manufactured by SAMEN Pharmaceutical Co. It is injected once in 2 minutes in the caudal epidural space.Send feedback. No - There is not a plan to make this available Justification or reason for not sharing IPD is Because the data is specific to this study and cannot be given to other researchers from an ethical point of view.