{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,2]],"date-time":"2026-06-02T02:46:34Z","timestamp":1780368394507,"version":"3.54.1"},"reference-count":28,"publisher":"Wiley","issue":"7","license":[{"start":{"date-parts":[[2025,7,1]],"date-time":"2025-07-01T00:00:00Z","timestamp":1751328000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["bjui-journals.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["BJUI Compass"],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Background<\/jats:title><jats:p>Allium stents are widely used in patients with ureteral stricture, with ongoing research continuously evaluating their clinical safety and efficacy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective<\/jats:title><jats:p>This study aimed to describe our technique and report the outcomes of Allium stent in the treatment of refractory ureteral strictures.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design, setting and participants<\/jats:title><jats:p>We retrospectively collected perioperative data on all patients treated with Allium stents in our department between January 2017 and April 2024 and assessed their clinical outcomes.<\/jats:p><\/jats:sec><jats:sec><jats:title>Surgical procedure<\/jats:title><jats:p>Following ureteroscopy, a guidewire was advanced under fluoroscopic guidance into the renal pelvis. The retrograde ureterography was performed to determine the location and length of the ureteral stricture. Dilation was performed using a ureteral balloon dilator, a flexible ureteroscope sheath, or a rigid ureteroscope. Subsequently, the Allium stent was deployed into the stricture segment and confirmed via fluoroscopic imaging.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>A total of 23 patients (25 ureters) were included, with a mean age of 57.7\u00a0years (32\u201376\u2009years). The mean length of ureteral strictures was 4.5\u00a0cm (range: 1\u201318\u2009cm). All stents were successfully positioned. As of December 2024, the stent patency rate was 68%, with a median follow\u2010up of 39.5\u00a0months (13\u201367\u2009months). In eight patency failure cases, the mean indwelling time was 14\u2009months, with the shortest recorded duration being 2\u00a0months. Causes of failure included four (50%) stent migration, one (12.5%) encrustation, two (25%) persistent stenosis and severe infection (12.5%). Management strategies for these cases included two (25%) stent removal, two (25%) robot\u2010assisted pyeloureteroplasty, one (12.5%) ureterolithotripsy, one (12.5%) exchange with a new Allium stent, one (12.5%) add new Allium stent, and one (12.5%) replacement with a different type of metal stent. Notably, one case of a ruptured ureter was successfully bridged with an Allium stent, and another case of a uretero\u2010vaginal fistula was effectively treated with Allium stent, both without complications.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>Allium stents appear to be a feasible and effective treatment for various ureteral strictures, including cases of ureteral perforation and rupture. However, long\u2010term complications such as stent migration and occlusion remain challenges that should not be overlooked.<\/jats:p><\/jats:sec>","DOI":"10.1002\/bco2.70042","type":"journal-article","created":{"date-parts":[[2025,7,1]],"date-time":"2025-07-01T04:05:16Z","timestamp":1751342716000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["The allium stent for the complex ureteral stricture\u2010deeper experience of a series case review"],"prefix":"10.1002","volume":"6","author":[{"given":"Hanqi","family":"Lei","sequence":"first","affiliation":[{"name":"Department of Urology, Kidney and Urology Center, Pelvic Floor Disorders Center, The Seventh Affiliated Hospital Sun Yat\u2010sen University  Shenzhen China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yajiao","family":"Cui","sequence":"additional","affiliation":[{"name":"Department of Urology, Kidney and Urology Center, Pelvic Floor 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