{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,14]],"date-time":"2026-05-14T22:49:30Z","timestamp":1778798970471,"version":"3.51.4"},"reference-count":26,"publisher":"S. Karger AG","issue":"6","license":[{"start":{"date-parts":[[2025,3,19]],"date-time":"2025-03-19T00:00:00Z","timestamp":1742342400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"},{"start":{"date-parts":[[2025,3,19]],"date-time":"2025-03-19T00:00:00Z","timestamp":1742342400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/karger.com\/pages\/terms-and-conditions"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Urol Int"],"abstract":"<jats:p>Introduction: The aim of the study was to compare the efficacy of a flexible-tip ureteral access sheath (F-UAS) with a traditional non-flexible ureteral access sheath (T-UAS) in the treatment of renal lower calyx stones. Methods: This retrospective analysis included clinical data from patients with unilateral renal lower calyx stones who underwent treatment with either an F-UAS (cases from December 2023 to September 2024) or a T-UAS (cases from January 2023 to November 2023). Inclusion criteria were ages 18\u201375 years, lower pole kidney stones measuring 1\u20132 cm. The primary outcome was the immediate postoperative stone-free rate (SFR) on the first day post-surgery. Secondary outcomes included operative time, postoperative complications, postoperative hospital stay, and 3-month SFR. Results: A total of 132 patients were included in the study, with 63 in the F-UAS group and 69 in the T-UAS group. Baseline characteristics were comparable between groups. The F-UAS group demonstrated a significantly higher day-1 postoperative SFR (73.0% vs. 17.4%; p &lt; 0.001). The overall complication rate was lower in the F-UAS group (p = 0.031), with a notably reduced incidence of postoperative fever. The F-UAS group also had a significantly lower basket usage rate (20.6% vs. 100%; p &lt; 0.001). There were no significant differences in operative time or 3-month SFR between the groups (p = 0.097 and p = 0.354, respectively). Hospital stay and stone composition were also similar between groups. Conclusion: Compared to T-UAS, the use of F-UAS for retrograde intrarenal surgery in the treatment of renal lower calyx stones is associated with a higher day-1 SFR. Additionally, the F-UAS group demonstrated reduced basket usage and fewer postoperative complications.<\/jats:p>","DOI":"10.1159\/000545070","type":"journal-article","created":{"date-parts":[[2025,3,20]],"date-time":"2025-03-20T13:52:38Z","timestamp":1742478758000},"page":"605-611","source":"Crossref","is-referenced-by-count":1,"title":["Comparison of Flexible-Tip and Non-Flexible Ureteral Access Sheaths for Treatment of Renal Lower Calyx Stones"],"prefix":"10.1159","volume":"109","author":[{"given":"Zhiyong","family":"Xiong","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Chen","family":"Li","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Keming","family":"Huang","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Zhen","family":"Han","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Shuai","family":"Wu","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"127","published-online":{"date-parts":[[2025,3,19]]},"reference":[{"key":"ref1","doi-asserted-by":"publisher","DOI":"10.1097\/JU.0000000000002331"},{"key":"ref2","doi-asserted-by":"publisher","DOI":"10.1002\/14651858.CD007044.pub4"},{"key":"ref3","doi-asserted-by":"publisher","DOI":"10.1007\/s11255-007-9220-z"},{"key":"ref4","doi-asserted-by":"publisher","DOI":"10.1055\/a-2290-7250"},{"key":"ref5","doi-asserted-by":"publisher","DOI":"10.3390\/jcm13041114"},{"key":"ref6","doi-asserted-by":"publisher","DOI":"10.1097\/JS9.0000000000001345"},{"key":"ref7","doi-asserted-by":"publisher","DOI":"10.3390\/jcm11175128"},{"key":"ref8","doi-asserted-by":"publisher","DOI":"10.1111\/bju.15836"},{"key":"ref9","doi-asserted-by":"publisher","DOI":"10.1111\/bju.15522"},{"key":"ref10","doi-asserted-by":"publisher","DOI":"10.1016\/j.eclinm.2024.102724"},{"key":"ref11","doi-asserted-by":"publisher","DOI":"10.1111\/bju.15873"},{"key":"ref12","doi-asserted-by":"publisher","DOI":"10.1007\/s00345-024-05104-z"},{"key":"ref13","doi-asserted-by":"publisher","DOI":"10.1007\/s00345-023-04697-1"},{"key":"ref14","doi-asserted-by":"publisher","DOI":"10.1007\/s00345-023-04648-w"},{"key":"ref15","doi-asserted-by":"publisher","DOI":"10.1155\/2022\/7518971"},{"key":"ref16","doi-asserted-by":"publisher","DOI":"10.1111\/bju.15593"},{"key":"ref17","doi-asserted-by":"publisher","DOI":"10.4111\/icu.20200278"},{"key":"ref18","doi-asserted-by":"publisher","DOI":"10.1097\/JU.0000000000001836"},{"key":"ref19","doi-asserted-by":"publisher","DOI":"10.1007\/s00345-023-04703-6"},{"key":"ref20","doi-asserted-by":"publisher","DOI":"10.1007\/s00240-022-01399-y"},{"key":"ref21","doi-asserted-by":"publisher","DOI":"10.3389\/fmed.2023.1101811"},{"key":"ref22","doi-asserted-by":"publisher","DOI":"10.4111\/icu.20200526"},{"key":"ref23","doi-asserted-by":"publisher","DOI":"10.1159\/000441042"},{"key":"ref24","doi-asserted-by":"publisher","DOI":"10.1111\/bju.15858"},{"key":"ref25","doi-asserted-by":"publisher","DOI":"10.1016\/j.euf.2021.01.010"},{"key":"ref26","doi-asserted-by":"publisher","DOI":"10.1016\/j.acuroe.2023.06.001"}],"container-title":["Urologia Internationalis"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/karger.com\/uin\/article-pdf\/doi\/10.1159\/000545070\/4353793\/000545070.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/karger.com\/article-pdf\/doi\/10.1159\/000545070","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,12,1]],"date-time":"2025-12-01T17:15:18Z","timestamp":1764609318000},"score":1,"resource":{"primary":{"URL":"https:\/\/karger.com\/article\/doi\/10.1159\/000545070"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,3,19]]},"references-count":26,"journal-issue":{"issue":"6","published-online":{"date-parts":[[2025,12,1]]},"published-print":{"date-parts":[[2025,12,3]]}},"URL":"https:\/\/doi.org\/10.1159\/000545070","archive":["Portico"],"relation":{},"ISSN":["0042-1138","1423-0399"],"issn-type":[{"value":"0042-1138","type":"print"},{"value":"1423-0399","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,3,19]]}}}