Sezgin YENİ, Nurullah AY
Archives of Basic and Clinical Research - 2026;8(1):66-70
Objective: To evaluate predictive factors for ureteral stricture in patients undergoing ureterorenoscopy (URS) for ureteral stones and to identify radiological and demographic parameters that may influence surgical access. Methods: This retrospective study analyzed data from 197 patients who underwent URS between 2023 and 2025. After applying inclusion and exclusion criteria, 141 patients with available abdomino-pelvic computed tomography (CT) scans were included. Group 1 comprised 30 patients with ureteral strictures requiring passive dilatation with double-J stenting, whereas Group 2 included 111 patients with successful ureteral access and stone fragmentation. Demographic data [age, sex, body mass index (BMI)] and CT-based measurements renal pelvis anteroposterior (AP) diameter, proximal, mid, and distal ureteral AP diameters, distal coronal AP diameter, and stone size) were compared between groups. Results: Distal ureteral transverse AP diameter (2.25 +/- 0.28 mm vs 3.17 +/- 0.55 mm, P < 0.001), distal coronal AP diameter (2.83 +/- 0.43 mm vs 3.56 +/- 0.42 mm, P < 0.001), and stone size (6.19 +/- 2.48 mm vs 7.48 +/- 2.06 mm, P = 0.031) were significantly lower in Group 1 than in Group 2. In addition, BMI was significantly higher in Group 1. Other CT parameters showed no significant differences. Conclusion: Narrow distal ureteral diameters and smaller stone sizes measured on preoperative CT, along with higher BMI, were associated with failure of ureteral access at the initial URS session. Identifying these predictors preoperatively may guide patient counseling and surgical planningand reduce intraoperative complications.
