NCT06809582

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

Does the Positioning in Retrograde Intrarenal Surgery Affect Stone-Free Rates? A Prospective Randomized Controlled Trial

• Status: Recruiting
• Phase: N/A
• Study type: Interventional
• Enrollment: 128 (estimated)
• Sponsor: Ondokuz Mayıs University · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

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.

Conditions

• Stone, Kidney
• Stones, Kidney
• Stone;Renal

Interventions

Type	Name	Description
PROCEDURE	The T-Tilt position	The T-Tilt position is a modified lithotomy position used during retrograde intrarenal surgery (RIRS). In this position: The patient is placed in a 30-degree Trendelenburg position, meaning the head is slightly lower than the feet. The surgical side is elevated at a 30-degree angle to improve access to the kidney. This modified positioning is designed to enhance stone clearance, particularly by facilitating the movement of stone fragments away from the lower kidney calyces, where residual stones often remain. Researchers will compare this position to the standard lithotomy position to determine its impact on stone-free rates and surgical outcomes.

Timeline

• Start date: 2025-01-01
• Primary completion: 2025-12-01
• Completion: 2026-06-01
• First posted: 2025-02-05
• Last updated: 2025-08-15

Locations

1 site across 1 country: Turkey (Türkiye)