ArticleWorld journal of urology2025
Prediction for spontaneous passage of ureteral stones with indwelling ureteral stent: PASS score.
Article in World journal of urology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Article
- Proximal/Distal ureteral diameter ratio as a predictor of spontaneous passage in <10 mm ureteral stones.The Canadian journal of urology · 2026Article
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7 authors.
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Abstract
purposeTo develop a predictive model for the spontaneous passage of ureterolithiasis in patients with indwelling ureteral stents.
methodsIn this retrospective cohort study, we reviewed all patients with ureterolithiasis who underwent ureteral stent placement at our institution from 2015 to 2021. Stone Characteristics, including stone location, density, shape, and diameter, were evaluated using computed tomography (CT). Low-density was defined as < 1000 Hounsfield units (HU). Spontaneous stone passage (SSP) was determinded by follow-up CT imaging or ureteroscopy. Multivariable logistic regression with backward selection was applied to identify predicts of SSP and to construct a predictive model.
resultsAmong 401 patients, 97 (24.2%) experienced SSP after a median follow-up of 26 days (Interquartile Range [IQR] 23-32). Independent predictors for SSP included low stone density < 1000 (Odds Ratio [OR] 7.45, 95% Confident Interval [CI] 2.79-25.94, p = < 0.001), location at the ureterovesical junction (OR 5.28, 95% CI 2.66-10.93, p = < 0.001), mid to distal ureteral location (OR 2.08, 95% CI 1.03-4.31, p = 0.013) and stone diameter ≤ 5 mm (OR 3.42, 95% CI 1.58-7.94, p = < 0.001). Using these predictors, we developed a three-item PASS Score to estimate the probability of SSP.
conclusionApproximately a quarter of ureteral stones passed spontaneously within 4 weeks of stent placement. The PASS score provides a practical tool for clinicians to estimate the likelihood of SSP and guide personalized treatment planning. External validation is required to confirm its clinical utility.
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