Impact of Surgical Position on Stone-Free Rates in Retrograde Intrarenal Surgery

The goal of this clinical trial is to determine whether the surgical position during retrograde intrarenal surgery (RIRS) affects stone-free rates in adults with kidney stones. The main questions it aims to answer are: * Does the modified lithotomy position result in a higher stone-free rate compared to the standard lithotomy position? * Are there differences in complication rates between the two surgical positions? Researchers will compare patients undergoing RIRS in the standard lithotomy position to those in the modified lithotomy position (30-degree Trendelenburg with elevated surgical side) to assess its impact on stone clearance and surgical outcomes. Participants will: * Be randomly assigned to one of two surgical positions * Undergo RIRS with standard surgical procedures * Have follow-up imaging to assess stone clearance after surgery This study aims to improve surgical techniques and patient outcomes in kidney stone treatment.

NCT Number	NCT06809582
Lead Sponsor	Ondokuz Mayıs University
Conditions	Stone, Kidney, Stones, Kidney, Stone;Renal
Enrollment	128 participants
Start Date	2025-01-01
Primary Completion	2025-12-01 (estimated)
Study Completion	2026-06-01 (estimated)
Updated on ClinicalTrials.gov	2025-08-15