IRCT201307153773N8 IRCT 2015-01-15 Tehran University of Medical Sciences The effect of Ropivacaine on post-operative pain after Transcataneous Percataneous Nepholytotomy The effect of Ropivacaine on post-operative pain after Transcataneous Percataneous Nepholytotomy 2013-07-23 anticipated 60 Complete https://irct.ir/trial/3883 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment. N/A Pain after Percutaneous Nephrolithotomy. Intervention 1: At the end of the operation, patients of intervention group, 30 mL of 0. 2% ropivacaine will be instilled into the renal puncture site, nephrostomy tract, and skin. Postoperatively, patients received Apotel I.V. (Acetaminophen) 1g. Pain visual analog score (VAS), peak expiratory flow rate (PEF) will be measured at 4, 6 hours postoperatively. The number of analgesic doses required will be recorded. Intervention 2: At the end of the operation, patients of control group, 30 mL of saline will be instilled into the renal puncture site, nephrostomy tract, and skin. Postoperatively, patients received Apotel I.V. (Acetaminophen) 1g. Pain visual analog score (VAS), peak expiratory flow rate (PEF) will be measured at 4, 6 hours postoperatively. The number of analgesic doses required will be recorded.