Caudal Neuroplasty Using Epidural Catheter Combined with Pulsed Radiofrequency (versus Pulsed Radiofrequency Alone

Inclusion Criteria: * Adult patients aged 20-80 years old complaining with lumbosacral radicular pain. * pain intensity ≥4 out of 10 on the numerical rating scale (NRS). * dominant leg pain with less intense back pain. * previous failure of conservative management such as physiotherapy, exercise therapy, or analgesic medications. * Epidural injections administered ≥12 weeks prior to recruitment were permitted because most of the patients visiting our clinic had a history of interlaminar or transforaminal epidural injections. * Magnetic resonance imaging (MRI) was obtained in all patients and the diagnosis of lumbar disc prolapse was confirmed. Exclusion Criteria: * patient refusal to participate in the study, * age \<20 years, * unbearable pain \>9-points on NRS, pain \<4-points on NRS. * signs of progressive motor weakness or neurologic deficits. * Instability of the spine * allergies to steroids or contrast dyes.5 * coagulopathy. * steroid injection within the previous 12 weeks. * systemic infection, injection site infection. * malignancy. * unstable medical or psychiatric condition