IRCT20190624043991N17 IRCT 2022-06-03 Tehran University of Medical Sciences Evaluation of success rate of kidney stone crushing based on body mass index and patient's condition Evaluation of success rate of kidney stone crushing based on body mass index and patient's condition during stone crushing 2022-06-10 anticipated 84 Complete https://irct.ir/trial/62907 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Randomization description: The present study is a randomized clinical trial. A simple randomization method and a random number table is used. In this way, a number will be selected randomly, if the number is even, the patient will enter the intervention group and if the number is odd, the patient will enter the second group. The researcher selects one of the numbers randomly, moves in one of the predetermined directions, records the numbers and assigns them to different groups. Even Number: Patients undergoing Percutaneous nephrolithotomy surgery (Supine Positions) odd Number: Patients undergoing Percutaneous nephrolithotomy surgery with (Prone Positions ). N/A Renal and ureteral stones. Intervention 1: Intervention group: Supine Positions in Percutaneous Nephrolithotomy. Intervention 2: Intervention group: Prone Positions in Percutaneous Nephrolithotomy. Yes - There is a plan to make this available What will be shared: Demographic information anonymously When: One year after publication To whom: Researchers working in academia, physicians, surgeons and hospitals Conditions: Any analysis can be done with the consent of the main researcher Where to obtain: Sina Hospital, Urology Research Center, Head of Urology Research Center: Dr. Seyed Mohammad Kazem Aghamir 00982166348560 How to obtain: After reviewing the information by the administrator and epidemiologist, the patient information will be available for the applicant by the provision of a patient's privacy. Comments: -