IRCT20190624043991N16 IRCT 2022-05-16 Tehran University of Medical Sciences Comparison of outcomes of standard Percutaneous nephrolithotomy and multiaccess Comparison of outcomes and complications of standard Percutaneous nephrolithotomy and multiaccess Percutaneous nephrolithotomy in patients with kidney stones 2022-05-31 anticipated 50 Complete https://irct.ir/trial/62905 interventional Randomization: Randomized, Blinding: Double blinded, Placebo: Not used, Assignment: Parallel, Purpose: Treatment, Other design features: -, Randomization description: The present study is a double-blind randomized clinical trial. For randomization, the balanced block randomization method with blocks of size 4 is used. Intervention group A and control group B have been determined. After the methodologist prepares the randomization sequence using the sealdenvelop online site, the generated sequence will be made available to a technician outside the research team. Quadruple blocks (A or B) are placed inside the envelopes. After the arrival of the first patient with the inclusion criteria, the envelopes are randomly selected and the type of patient group is informed to the research team through a trained technician. The patient is placed in MULTIACCESS or PCNL treatment group based on the randomly selected envelope, Blinding description: Patients who have given their consent to participate in the study and Therapist. To perform the blinding process, envelopes related to the type of intervention are provided only to the technician. The physician is not informed of the type of intervention (MULTIACCESS or Percutaneous nephrolithotomy) to avoid bias. N/A kidney stones. Intervention 1: Control group: PCNL treated. In this method, the stone is accessed through a single access, the stones are removed after being crushed. Sometimes it is necessary to use multiple accesses to completely remove the stones. Intervention 2: Intervention group: Group 2: MULTIACCESS treated. In this method, access to different areas of the kidney is created through a single input. In short, with a single access and on different parts of the kidney, puncture and access to multiple stones is achieved. 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: -