IRCT201410229014N45 IRCT 2014-10-28 Vice-chancellor for Research the Technology, Hamadan University of Medical Sciences Effect of intravenous magnesium sulfate versus placebo on postoperative pain and urethral catheter discomforts in patients undergo transurethral ureterolithotripsy Effect of intravenous magnesium sulfate versus placebo on postoperative pain and urethral catheter discomforts in patients undergo transurethral ureterolithotripsy: a double blinded randomized clinical trial 1992-06-01 anticipated 70 Complete https://irct.ir/trial/9484 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Used, Assignment: Parallel, Purpose: Treatment, Other design features: Randomization: The patients will be allocated to intervention and control groups through systematic randomization one at a time. Blinding: The patients in the intervention and control groups will receive serums with the same volume and color. Therefore, they will not aware of the intervention. In addition, the examiner will not aware of the type of intervention. Accordingly, the trial will be run as double blinded. 2 kidney stone. Intervention 1: Intravenous infusion of 25 mg/kg magnesium sulfate in 500 ml ringer serum 5 min before spinal anesthesia plus intravenous infusion of 25 mg/kg magnesium sulfate in 1000 ml ringer serum after surgery twice with an 8-hour interval. Intervention 2: Intravenous infusion of 500 ml normal saline 5 min before spinal anesthesia plus intravenous infusion of 500 ml normal saline after surgery twice with an 8-hour interval.