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On the rocks: can urologists identify stone composition based on endoscopic images alone? A worldwide survey of urologists
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On the rocks: can urologists identify stone composition based on endoscopic images alone? A worldwide survey of urologists
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On the rocks: can urologists identify stone composition based on endoscopic images alone? A worldwide survey of urologists
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Journal Article
On the rocks: can urologists identify stone composition based on endoscopic images alone? A worldwide survey of urologists
2023
Overview
PurposeAs part of the management of nephrolithiasis, determination of chemical composition of stones is important. Our objective in this study is to assess urologists’ accuracy in making visual, intraoperative determinations of stone composition.Materials and methodsWe conducted a REDCap survey asking urologists to predict stone composition based on intraoperative images of 10 different pure-composition kidney stones of 7 different types: calcium oxalate monohydrate (COM), calcium oxalate dihydrate (COD), calcium phosphate (CP) apatite, CP brushite, uric acid (UA), struvite (ST) and cystine (CY). To evaluate experience, we examined specific endourologic training, years of experience, and number of ureteroscopy (URS) cases/week. A self-assessment of ability to identify stone composition was also required.ResultsWith a response rate of 26% (366 completed surveys out of 1,370 deliveries), the overall accuracy of our cohort was 44%. COM, ST, and COD obtained the most successful identification rates (65.9%, 55.7%, and 52.0%, respectively). The most frequent misidentified stones were CP apatite (10.7%) and CY (14.2%). Predictors of increased overall accuracy included self-perceived ability to determine composition and number of ureteroscopies per week, while years of experience did not show a positive correlation.ConclusionsAlthough endoscopic stone recognition can be an important tool for surgeons, it is not reliable enough to be utilized as a single method for stone identification, suggesting that urologists need to refine their ability to successfully recognize specific stone compositions intraoperatively.
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