An observational study in Renal Stones, sponsored by Maharajgunj Medical Campus. Completed at 1 site in Nepal. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2025-06-18.
Sponsored by Maharajgunj Medical Campus · Observational
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.
324 studies on the registry are indexed under Nephrolithiasis; 90 are open to participants now.
This study's enrollment of 60 is below the median of 100 across 57 observational studies indexed under Nephrolithiasis.
Browse Nephrolithiasis studies →Maharajgunj Medical Campus is the lead sponsor of 8 studies on the registry; none are open to participants now.
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All the patients with renal calculi undergoing RIRS.
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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.
Correlation between the RIRS Scoring System and stone-free rate after Retrograde Intrarenal Surgery (RIRS), assessed using CT KUB
Time frame: 12 months
Correlation between the Resorlu-Unsal Stone Score (RUSS) and stone-free rate after Retrograde Intrarenal Surgery (RIRS), assessed using CT KUB
Time frame: 12 months
Stone Burden as a Predictor of Stone-Free Rate After RIRS
Correlation between stone burden (mm²) and stone-free rate after Retrograde Intrarenal Surgery (RIRS
Time frame: Preoperative assessment and 1 month postoperatively for stone-free status
Stone Density as a Predictor of Stone-Free Rate After RIRS
Correlation between stone density (Hounsfield Units, HU) and stone-free rate after RIRS
Time frame: Preoperative assessment and 1 month postoperatively for stone-free status
Plan to share: Yes
Supporting information: Study protocol
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This study is completed, as verified in Jan 2024. You cannot join it, but the record below documents what was studied.
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Maharajgunj Medical Campus