{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,26]],"date-time":"2026-10-26T23:36:27Z","timestamp":1793057787985,"version":"4.5.0"},"reference-count":14,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2021,11,11]],"date-time":"2021-11-11T00:00:00Z","timestamp":1636588800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"},{"start":{"date-parts":[[2021,11,11]],"date-time":"2021-11-11T00:00:00Z","timestamp":1636588800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"funder":[{"name":"Huzhou Science and Technology Bureau Public welfare application research project","award":["2019GY23"],"award-info":[{"award-number":["2019GY23"]}]}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["BMC Urol"],"published-print":{"date-parts":[[2021,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec>\n                <jats:title>Objectives<\/jats:title>\n                <jats:p>Ureteral stenosis is a serious complication of flexible ureteroscopy. How to predict the possibility of stricture before surgery is an important topic. This research retrospectively studied the influence of preoperative hydronephrosis on ureteral stenosis after flexible ureteroscopy, to explore whether the preoperative hydronephrosis could predict postoperative ureteral stenosis.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Methods<\/jats:title>\n                <jats:p>We conducted a retrospective study on patients who received flexible ureteroscopy in our hospital for upper ureteral calculi from January 2015 to June 2018. Patients were\u00a0followed-up\u00a0for 36\u00a0months after surgery, and intraoperative and postoperative complications were recorded. We divided patients into the mild hydronephrosis group and moderate to severe hydronephrosis group. Preoperative clinical baseline data of the patients were adjusted by propensity matching score analysis. Differences\u00a0of intraoperative ureteral injury, operative time, postoperative ureteral stricture, and SFR one month after surgery was statistically analyzed. Kaplan\u2013Meier\u2019s method and Log-rank test were used to compare the differences in the cumulative incidence of ureteral stenosis between the two groups. Cox regression was used to compare the hazard ratio of ureteral stenosis between the two groups.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Results<\/jats:title>\n                <jats:p>A total of 447 patients with 469 sides surgery were included, including 349 sides in the mild hydronephrosis group and 120 sides in the moderate to severe hydronephrosis group. Twenty-nine patients with 30 sides developed ureteral stenosis. Before and after propensity, the incidence of ureteral stricture matching analysis was 6.4% and 8%, respectively. There were statistical differences in ureteral stricture and injury, but the statistical differences in SFR and operation time were inconsistent. Kaplan\u2013Meier showed a significant difference in the cumulative incidence of ureteral stenosis between the two groups.<\/jats:p>\n              <\/jats:sec><jats:sec>\n                <jats:title>Conclusions<\/jats:title>\n                <jats:p>Patients with moderate to severe hydronephrosis before surgery were more likely to have an intraoperative ureteral injury and postoperative ureteral stricture after FRUS. Preoperative hydronephrosis is an important predictor of ureteral stricture.<\/jats:p>\n              <\/jats:sec>","DOI":"10.1186\/s12894-021-00917-1","type":"journal-article","created":{"date-parts":[[2021,11,11]],"date-time":"2021-11-11T06:02:35Z","timestamp":1636610555000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":20,"title":["Preoperative hydronephrosis is a predictive factor of ureteral stenosis after flexible ureteroscopy: a propensity scores matching analysis"],"prefix":"10.1186","volume":"21","author":[{"given":"Yuefan","family":"Shen","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anping","family":"Xiang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sihai","family":"Shao","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2021,11,11]]},"reference":[{"key":"917_CR1","unstructured":"T\u00fcrk (Chair) AN C, Pet\u0159\u00edk A, Seitz C, Skolarikos (Vice-chair) A, Somani B, Thomas K, Gambaro G; members of the EAU\u2013ESTRO\u2013ESUR\u2013IOG urolithiasis guidelines panel: EAU\u2013ESTRO\u2013ESUR\u2013SIOG guidelines on urolithiasis. 2021. https:\/\/uroweb.org\/guideline\/urolithiasis\/#3."},{"issue":"2","key":"917_CR2","doi-asserted-by":"publisher","first-page":"94","DOI":"10.1016\/j.ajur.2017.09.002","volume":"5","author":"H Dong","year":"2018","unstructured":"Dong H, Peng Y, Li L, Gao X. Prevention strategies for ureteral stricture following ureteroscopic lithotripsy. Asian J Urol. 2018;5(2):94\u2013100.","journal-title":"Asian J Urol"},{"issue":"3","key":"917_CR3","doi-asserted-by":"publisher","first-page":"276","DOI":"10.4103\/UA.UA_110_18","volume":"11","author":"AE Darwish","year":"2019","unstructured":"Darwish AE, Gadelmoula MM, Abdelkawi IF, Abdellatif AM, Abdel-Moneim AM, Hammouda HM. Ureteral stricture after ureteroscopy for stones: a prospective study for the incidence and risk factors. Urol Ann. 2019;11(3):276\u201381.","journal-title":"Urol Ann"},{"issue":"6","key":"917_CR4","first-page":"8079","volume":"22","author":"V Srougi","year":"2015","unstructured":"Srougi V, Padovani GP, Marchini GS, Vicentini FC, Mazzucchi E, Srougi M. Outcomes of surgical treatment of ureteral strictures after laser ureterolithotripsy for impacted stones. Can J Urol. 2015;22(6):8079\u201384.","journal-title":"Can J Urol"},{"issue":"11","key":"917_CR5","doi-asserted-by":"publisher","first-page":"1841","DOI":"10.1007\/s00345-015-1545-0","volume":"33","author":"Y Shao","year":"2015","unstructured":"Shao Y, Wang DW, Lu GL, Shen ZJ. Retroperitoneal laparoscopic ureterolithotomy in comparison with ureteroscopic lithotripsy in the management of impacted upper ureteral stones larger than 12 mm. World J Urol. 2015;33(11):1841\u20135.","journal-title":"World J Urol"},{"key":"917_CR6","doi-asserted-by":"publisher","first-page":"45","DOI":"10.1016\/j.urology.2017.04.047","volume":"106","author":"T Yoshida","year":"2017","unstructured":"Yoshida T, Inoue T, Omura N, Okada S, Hamamoto S, Kinoshita H, Matsuda T. Ureteral wall thickness as a preoperative indicator of impacted stones in patients with ureteral stones undergoing ureteroscopic lithotripsy. Urology. 2017;106:45\u20139.","journal-title":"Urology"},{"key":"917_CR7","doi-asserted-by":"crossref","unstructured":"Qin C, Yin H, Du Y, Li Q, Liu H, Xu T. Predicting ureteral status below the ureteral calculi in patients undergoing ureteroscopic lithotomy. Acta Radiol. 2021; 284185120988092.","DOI":"10.1177\/0284185120988092"},{"issue":"4","key":"917_CR8","doi-asserted-by":"publisher","first-page":"309","DOI":"10.1089\/end.2017.0657","volume":"32","author":"PC May","year":"2018","unstructured":"May PC, Hsi RS, Tran H, Stoller ML, Chew BH, Chi T, Usawachintachit M, Duty BD, Gore JL, Harper JD. The morbidity of ureteral strictures in patients with prior ureteroscopic stone surgery: multi-institutional outcomes. J Endourol. 2018;32(4):309\u201314.","journal-title":"J Endourol"},{"issue":"4","key":"917_CR9","doi-asserted-by":"publisher","first-page":"1033","DOI":"10.1007\/s00345-013-1185-1","volume":"32","author":"M Schoenthaler","year":"2014","unstructured":"Schoenthaler M, Buchholz N, Farin E, Ather H, Bach C, Bach T, Denstedt JD, Fritsche HM, Grasso M, Hakenberg OW, et al. The Post-Ureteroscopic Lesion Scale (PULS): a multicenter video-based evaluation of inter-rater reliability. World J Urol. 2014;32(4):1033\u201340.","journal-title":"World J Urol"},{"issue":"3","key":"917_CR10","doi-asserted-by":"publisher","first-page":"686","DOI":"10.3906\/sag-1503-9","volume":"46","author":"E \u00d6\u011freden","year":"2016","unstructured":"\u00d6\u011freden E, O\u011fuz U, Demirelli E, Benli E, Sancak EB, G\u00fclpinar MT, Akba\u015f A, Re\u015forlu B, Ayyildiz A, Yal\u00e7in O. Categorization of ureteroscopy complications and investigation of associated factors by using the modified Clavien classification system. Turk J Med Sci. 2016;46(3):686\u201394.","journal-title":"Turk J Med Sci"},{"issue":"1","key":"917_CR11","doi-asserted-by":"publisher","first-page":"63","DOI":"10.4111\/kju.2015.56.1.63","volume":"56","author":"XI Fam","year":"2015","unstructured":"Fam XI, Singam P, Ho CC, Sridharan R, Hod R, Bahadzor B, Goh EH, Tan GH, Zainuddin Z. Ureteral stricture formation after ureteroscope treatment of impacted calculi: a prospective study. Korean J Urol. 2015;56(1):63\u20137.","journal-title":"Korean J Urol"},{"key":"917_CR12","doi-asserted-by":"publisher","first-page":"985","DOI":"10.1089\/end.2020.0421","volume":"35","author":"\u00d8 Ulvik","year":"2020","unstructured":"Ulvik \u00d8, Harneshaug JR, Gjengst\u00f8 P. Ureteral strictures following ureteroscopic stone treatment. 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Urol Int. 2017;98(2):125\u201333.","journal-title":"Urol Int"}],"container-title":["BMC Urology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1186\/s12894-021-00917-1.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1186\/s12894-021-00917-1\/fulltext.html","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1186\/s12894-021-00917-1.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2021,11,11]],"date-time":"2021-11-11T06:03:41Z","timestamp":1636610621000},"score":1,"resource":{"primary":{"URL":"https:\/\/bmcurol.biomedcentral.com\/articles\/10.1186\/s12894-021-00917-1"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,11,11]]},"references-count":14,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2021,12]]}},"alternative-id":["917"],"URL":"https:\/\/doi.org\/10.1186\/s12894-021-00917-1","relation":{},"ISSN":["1471-2490"],"issn-type":[{"value":"1471-2490","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,11,11]]},"assertion":[{"value":"12 July 2021","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"29 October 2021","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"11 November 2021","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"The study protocol was approved by the ethics committee of the First People\u2019s Hospital of Huzhou (approval number, 2020KYLL032). We have obtained written informed consent from all study participants.All of the procedures were performed in accordance with the Declaration of Helsinki and relevant policies in China.","order":2,"name":"Ethics","group":{"name":"EthicsHeading","label":"Ethics approval and consent to participate"}},{"value":"Not applicable.","order":3,"name":"Ethics","group":{"name":"EthicsHeading","label":"Consent for publication"}},{"value":"The authors declare that they have no competing interests.","order":4,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"153"}}