Mp04-05 a New Measuring Factor of Psa Adding in Scoring System Can Predict Lower Pole Renal Stone Free Rate After Rirs

You have accessJournal of UrologyStone Disease: Surgical Therapy (including ESWL) I (MP04)1 May 2024MP04-05 A NEW MEASURING FACTOR OF PSA ADDING IN SCORING SYSTEM CAN PREDICT LOWER POLE RENAL STONE FREE RATE AFTER RIRS Hsiang ying Lee, Yu Hung Y Tung, and Kuan-Hsien Wu Hsiang ying LeeHsiang ying Lee , Yu Hung Y TungYu Hung Y Tung , and Kuan-Hsien WuKuan-Hsien Wu View All Author Informationhttps://doi.org/10.1097/01.JU.0001008708.00982.a9.05AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookLinked InTwitterEmail Abstract INTRODUCTION AND OBJECTIVE: To predict stone-free rate (SFR) following retrograde intrarenal surgery (RIRS), various scoring systems were developed, but their practical use is limited. In this study, a novel approach for assessing the renal infundibulopelvic angle (RIPA) was devised, specifically designed to align with contemporary RIRS techniques and preoperative assessment imaging. This new method's effectiveness was evaluated by comparing it to the conventional approach using the infundibulopelvic angle (IPA). METHODS: We retrospectively reviewed records of patients who underwent retrograde intrarenal surgery for renal stones between April 6, 2018, and August 20, 2019. Patient demographics, stone characteristics, and perioperative data were also recorded. Subsequently, we introduced a modified angle measurement called the pelvic stone angle (PSA) and evaluated its predictive performance for stone-free rates by comparing it with the traditional method in scoring systems. RESULTS: A total of 43 individuals underwent retrograde intrarenal surgery between April 2018 and August 2019. Notable differences in stone burden and Hounsfield unit measurements were found between the stone-free and non-stone-free patients. The PSA demonstrated a good model fit when used in scoring systems, performing as well as the conventional approach. The area under the receiver operating characteristic curve for the R.I.R.S. scoring system using the pelvic stone angle was 0.7554, while for the conventional approach, it was 0.7478, with no statistically significant difference (p=0.7726). Accuracy analysis demonstrated that all scoring systems effectively predicted stone-free outcomes, with the PSA performing comparably to the conventional approach. CONCLUSIONS: Our results indicate that PSA's predictive ability for SFR is comparable to IPA. Moreover, scoring systems using PSA as input information exhibit better model fit compared to those using IPA. In the future, further large-scale, multi-center, and multi-cohort external validation will be necessary to confirm the superiority of this angle over traditional IPA measurements. Download PPTDownload PPT Source of Funding: No © 2024 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 211Issue 5SMay 2024Page: e34 Advertisement Copyright & Permissions© 2024 by American Urological Association Education and Research, Inc.Metrics Author Information Hsiang ying Lee More articles by this author Yu Hung Y Tung More articles by this author Kuan-Hsien Wu More articles by this author Expand All Advertisement PDF downloadLoading ...