ArticleUrolithiasis2022
The ratio of CT attenuation values of the ureter above/below ureteral stones is a useful preoperative factor for predicting impacted ureteral stones.
Article in Urolithiasis, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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Who cites it
12 citing papers in PubMed, 19 citations in OpenAlex.
- Article
- Measuring and analyzing objective factors of impacted ureteral stones on Non-Contrast Computed Tomography (NCCT): a retrospective case-control study.Urolithiasis · 2026Article
- Active migration technique in RIRS for 1- to 2-cm middle and upper ureteral stones in a prospective randomized controlled study.BJUI compass · 2026Article
- Article
- Can ureteric stone impaction be predicted preoperatively using noninvasive parameters? A prospective study.Arab journal of urology · 2026Article
- Study on the diagnostic efficacy of the computerized tomography attenuation value of renal pelvis urine in true bacteriuria secondary to renal and ureteral stones.Renal failure · 2025Article
- Pathological and radiological evaluation of ureteral wall thickness measurement in urolithiasis.Urolithiasis · 2025Article
- Advancing decision-making in shock wave lithotripsy for upper ureteral stones: the role of radiological stone impaction markers.Urolithiasis · 2025Article
- Predictive value of NCCT quantitative analysis for proximal and middle impacted ureteral stones.Urolithiasis · 2024Article
- Radiological signs of stone impaction add no value in predicting spontaneous stone passage.Urolithiasis · 2024Article
- Area of hydronephrosis is a useful predictive factor of impacted ureteral stones.Urolithiasis · 2024Article
- Prospective observational study on the prognosis of ureteral lesions caused by impacted stones via dual-energy spectral computed tomography.Asian journal of urology · 2023Article
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Authors and funding
7 authors at 1 institution in 1 country.
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Abstract
Impacted stones typically make it difficult to perform ureteroscopic lithotripsy (URSL), so it is useful to preoperatively predict such impaction. We focused on CT attenuation values of the ureter above and below the stone ('HU above' and 'HU below') and calculated their ratio (HAB ratio; HU above/HU below ratio). The aim was to investigate whether HAB ratio could predict impacted stones preoperatively. Between 2011 and 2019, 171 patients from our hospital that had URSL for ureteral stones with pretreatment non-contrast computed tomography (NCCT) were retrospectively identified. Ureteral wall thickness (UWT), ureteral wall volume (UWV) and HAB ratio ('HU above' divided by 'HU below') were recorded. Impacted stones were defined as fixed stones that did not move by means of ureteroscopic manipulation or water pressure. Of the 171 procedures, 46 (27%) involved patients with impacted stones. Comparing patient characteristics and stone parameters according to impaction status, factors with significant difference included grade of hydronephrosis, UWT, and HAB ratio (all P < 0.01). Multivariate analysis indicated that significant independent predictors of impacted stones were thicker UWT and lower HAB ratio (all P < 0.01). HAB ratio was a significant preoperative predictor of stone impaction in patients undergoing URSL for ureteral stones. HAB ratio may be informative for selecting the treatment and preoperative preparations.
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