Original Article
The use of ureteral wall thickness for predicting the presence of distal ureter impacted stones in patients with ureteral stones undergoing ureteroscopic lithotripsy
Yu Jin, Zheng Liang, Pan Qi, Niu Bin, Jia Lei
Published 2020-03-15
Cite as Int J Urol Nephrol, 2020,40(02): 200-203. DOI: 10.3760/cma.j.issn.1673-4416.2020.02.003
Abstract
ObjectiveTo evaluate the significance of ureteral wall thickness(UWT) for predicting the presence of distal ureter impacted stones in patients with ureteral stones undergoing ureteroscopic lithotripsy(URSL).
MethodsWe retrospectively analyzed 320 procedures in patients with distal ureter impacted stones who underwent URSL between February 2014 and February 2018.Maximum UWT at the stone site was measured from computed tomography images.Receiver operating characteristic curve analysis was applied to determine the UWT cutoff value and to evaluate its accuracy in predicting impacted stones.
ResultsOf the 320 patients, 119 involved patients with impacted stones.The univariate analysis showed significant differences in perirenal exudation, stone number and size and UWT.The receiver operating characteristic curve analysis showed that 3.15 mm was the optimal cutoff value for UWT, with a predictive accuracy of 0.94.
ConclusionsUWT is associated with surgical outcomes in patients with distal ureter impacted stones ondergoing URSL.
Key words:
Ureteral Calculi; Urethral Obstruction; Ureteroscopy; Ureteral wall thickness
Contributor Information
Yu Jin
Department of Urology, the Second Affiliated Hospital of Xi'an Medical University, Xi'an 710038, China
Zheng Liang
Department of Urology, the Second Affiliated Hospital of Xi'an Medical University, Xi'an 710038, China
Pan Qi
Department of Radiology, the Second Affiliated Hospital of Xi'an Medical University, Xi'an 710038, China
Niu Bin
Department of Urology, the Second Affiliated Hospital of Xi'an Medical University, Xi'an 710038, China
Jia Lei
Department of Urology, the Second Affiliated Hospital of Xi'an Medical University, Xi'an 710038, China