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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.
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| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Retrograde intrarenal surgery (RIRS) | Procedure | 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. |
| Measure | Description | Time Frame |
|---|---|---|
| Correlation between the RIRS Scoring System and stone-free rate after Retrograde Intrarenal Surgery (RIRS), assessed using CT KUB | 12 months | |
| Correlation between the Resorlu-Unsal Stone Score (RUSS) and stone-free rate after Retrograde Intrarenal Surgery (RIRS), assessed using CT KUB | 12 months |
| Measure | Description | Time Frame |
|---|---|---|
| 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 | Preoperative assessment and 1 month postoperatively for stone-free status |
| Stone Density as a Predictor of Stone-Free Rate After RIRS |
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Inclusion Criteria:
Exclusion Criteria:
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All the patients with renal calculi undergoing RIRS.
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| Name | Affiliation | Role |
|---|---|---|
| Saro Prajapati, MBBS, MS | Department of General Surgery Maharajgunj Medical Campus Institute of Medicine, Tribhuvan University | Study Director |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| Department of Urology and Kidney Transplant Surgery, Tribhuvan University Teaching Hospital (TUTH), Maharajgunj, Kathmandu, Nepal | Kathmandu | Bagmati | 44600 | Nepal |
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Correlation between stone density (Hounsfield Units, HU) and stone-free rate after RIRS |
| Preoperative assessment and 1 month postoperatively for stone-free status |
| ID | Term |
|---|---|
| D053040 | Nephrolithiasis |
| ID | Term |
|---|---|
| D007674 | Kidney Diseases |
| D014570 | Urologic Diseases |
| D052776 | Female Urogenital Diseases |
| D005261 | Female Urogenital Diseases and Pregnancy Complications |
| D000091642 | Urogenital Diseases |
| D052878 | Urolithiasis |
| D052801 | Male Urogenital Diseases |
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