Real-World Practice Stone-Free Rates After Ureteroscopy From a Surgical Collaborative: Much to Improve

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Conference Proceeding

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European Urology


Introduction & Objectives: The stone-free rate (SFR) is an important outcome measure of quality after ureteroscopy for urinary stones. Recent studies show SFRs may not be as high as previously reported. However, these studies are from expert centers, and data from real-world community practice is lacking. We examined the SFR and its predictors following ureteroscopy among diverse practices in the state of Michigan. Materials & Methods: We used the Michigan Urological Surgery Improvement Collaborative (MUSIC) Reducing Operative Complications from Kidney Stones (ROCKS) registry to identify ureteroscopy cases for renal and ureteral stone location, respectively, treated between 2016 and 2021, that had postoperative imaging. Stone-free was defined as no fragment detected on imaging within 60 days. Practice and surgeon-level SFR variations were assessed. Surgeon volume was categorized according to quartiles of annual volume. Factors associated with SFR were examined using logistic regression. Results: 6,487 ureteroscopies were performed across 29 practices and 164 surgeons, to treat 2,091 (32.2%) renal and 4396 (67.8%) ureter stones. The SFR was 49.6% and 72.7% for renal and ureteral stone location, respectively. For renal stones, larger stone size, lower pole location, and multiplicity were significantly associated with residual fragments (Table 1). For ureteral stones, female gender, larger stone size, proximal location, multiplicity, positive urine culture, use of ureteral access sheath, and post-ureteroscopy stenting were predictors for low SFR (Table 1). No significant differences in SFRs were identified regarding pre-stenting and surgeon volume. Surgeon variation in the SFR for renal and ureteral stones, when adjusted for risk factors, was 29.0-68.7% (p





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EAU22 37th Annual EAU Congress, July 1-4, 2022, Amsterdam.

American Urological Association Annual Meeting, May 13-16, 2022, New Orleans, LA.

Kim HJ, Daignault-Newton S, DiBianco JM, Jafri SM, Seifman B, Kleer E, et al. Real-world practice stone-free rates after ureteroscopy from a surgical collaborative: much to improve. J Urol. 2022 May;207(Suppl 5):e572-e573. doi:10.1097/JU.0000000000002610.04.