IRCT20190624043991N2 IRCT 2019-09-07 Tehran University of Medical Sciences Effectiveness of bleeding preventive powder for reducing postoperative PCNL complications Effect of ARISTA Hemostatic Powder on Reduction of Complications after PCNL Surgery 2019-09-06 anticipated 40 Complete https://irct.ir/trial/40766 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive, Randomization description: The randomization method used in this study will be a simple randomization study that randomly selects a number using the random number table and moves to the right according to the previous assumption. If the number was even, the patient entered the intervention group and if Number of individual patients will enter the control group. 3 Urinary stones. Intervention 1: Intervention group: Half of Patients undergoing PCNL surgery after the end of surgery and removal of stones and re-examination of the kidney with a nephroscope before removing the ampluvat of the hemostatic powder (3 grams with brand name (arista is pumped into the amplutz and accompanied by the exit of the amplutz in its path) The hemostatic powder is pumped. Intervention 2: Half of patients will undergo PCNL surgery that will not receive ARISTA hemostatic powder after surgery.receive ARISTA after the surgery. Undecided - It is not yet known if there will be a plan to make this available Justification or reason for indecision in sharing IPD is No more information