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BioMed Research International
Volume 2017 (2017), Article ID 1653184, 6 pages
Research Article

Change of Renal Parenchymal Width in Patients with Unilateral Ureteral Stent: A Bicenter Retrospective Study

1Department of Urology, St. Vincent’s Hospital, College of Medicine, The Catholic University of Korea, Suwon, Republic of Korea
2Department of Urology, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea

Correspondence should be addressed to Dong Sup Lee

Received 14 February 2017; Accepted 11 May 2017; Published 1 June 2017

Academic Editor: Christian Schwentner

Copyright © 2017 Hee Youn Kim et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Purpose. To determine whether kidney sizes were changed after ureteral stents were instilled, and if so, what parameters were significant. Methods. Parenchymal width (PW) of 98 patients with unilateral ureteral stents was measured from the coronal view of CT scans for both stented and unstented contralateral kidney. The mean PW and % change of mean PW were calculated before stenting and at the time of last stent change. Estimated glomerular filtrate rate (eGFR) was recorded as well. Results. The mean duration of ureteral stent indwelled was (mean ± SD) months. The change of mean PW of stented kidneys and unstented contralateral kidneys was − (mean ± SD)% and %, respectively. eGFR before and at the time of the last stent change did not show significant difference (). Duration of ureteral stent indwelled was found to be inversely related to the % change of mean PW (Spearman’s correlation coefficient = −0.291, ). Conclusions. For unilateral ureteral obstruction, kidney size was decreased over time in spite of indwelling ureteral stent. This finding can be overlooked by clinicians due to compensatory growth of contralateral kidney and resultant normal eGFR.