NCT07026721

Comparative Analysis of RIRS Scoring System and Resorlu Unsal Stone Score (RUSS) for Predicting Stone-free Rate After Retrograde Intrarenal Surgery

Comparative Analysis of RIRS Scoring System and Resorlu Unsal Stone Score (RUSS) for Predicting Stone-Free Rate After Retrograde Intrarenal Surgery: A Prospective Cohort Study

• Status: Completed
• Phase: —
• Study type: Observational
• Enrollment: 60 (actual)
• Sponsor: Maharajgunj Medical Campus · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

Several studies have investigated the use of scoring systems for predicting stone-free rates after RIRS. Previous research has evaluated the RIRS Scoring System, RUSS, and other similar systems in different patient populations. This study was conducted to compare RIRS scoring system and Resorlu Unsal Stone Score (RUSS) for predicting stone free rate.

Conditions

• Renal Stones

Interventions

Type	Name	Description
PROCEDURE	Retrograde intrarenal surgery (RIRS)	The intervention involves Retrograde Intrarenal Surgery (RIRS) performed using a flexible ureteroscope to access the renal collecting system via a retrograde (urethra → bladder → ureter → kidney) approach. Stones are fragmented using a holmium:YAG laser, with or without the use of a ureteral access sheath, depending on the case. What distinguishes this intervention from others is the integration of preoperative scoring systems-specifically the RIRS Scoring System and the Resorlu Unsal Stone Score (RUSS)-to predict stone-free outcomes and guide case selection and surgical planning. Additionally, all procedures are performed by experienced endourologists following a standardized protocol, including consistent patient positioning, anesthesia, access technique, and post-operative imaging at defined intervals to assess outcomes.

Timeline

• Start date: 2024-01-01
• Primary completion: 2024-12-27
• Completion: 2024-12-29
• First posted: 2025-06-18
• Last updated: 2025-06-18

Locations

1 site across 1 country: Nepal