IRCT201509111323N9 IRCT 2016-02-28 Vice Chancellor for research of Yasuj University of Medical Sciences Position and Percutaneous Nephrolithotomy Comparison of efficacy and complications of tubeless Percutaneous Nephrolithotomy in prone and supine position under spinal anesthesia in adult patients 2015-01-01 anticipated 64 Complete https://irct.ir/trial/578 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Other design features: For randomization of patients to one of two groups of interventions block randomization with four block were used. 2 Renal and ureteral stones. Intervention 1: Performing tubeless percutaneous nephrolithotomy(Tubeless) under spinal anesthesia in prone position in Group 1 (prone position) after prep of patients under spinal anesthesia( 2، 2.5 milliliter of bupivacaine and 0.5 milliliter of fentanyl) ureteral catheter 5،6 F will be inserted in ureter in the lithotomy position .Then the patient position will be changed in prone position and with fluoroscopic guidance PCNL will performed using standard methods without nephrostomy tube. Intervention 2: Performing tubeless percutaneous nephrolithotomy(Tubeless) under spinal anesthesia in supine position in Group 2 ( Supine position) after prep of patients under spinal anesthesia (2، 2.5 milliliter of bupivacaine and 0.5 milliliter of fentanyl) ureteral catheter 5،6F will be inserted in ureter in the lithotomy position .Then the patient position will be changed to supine position and with fluoroscopic guidance PCNL will performed using standard methods without nephrostomy tube.