{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,12]],"date-time":"2026-09-12T00:12:47Z","timestamp":1789171967452,"version":"build-2803163510"},"reference-count":18,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2022,10,28]],"date-time":"2022-10-28T00:00:00Z","timestamp":1666915200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Int J of Urology"],"published-print":{"date-parts":[[2023,2]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>This study aimed to evaluate the pelvicalyceal anatomy on accessibility of reusable flexible ureteroscopy (fURS) to the lower pole calyx during retrograde intrarenal surgery (RIRS).<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Here, 854 patients with ureteral or kidney stones with access to a renal collecting system using reusable fURS were classified into either the accessible group, in whom the deepest lower pole calyces could be touched; and the inaccessible group, in whom the deepest lower calyces could not be touched. We measured the infundibulopelvic angle (IPA), infundibular width (IW), infundibular length (IL), and calyceal pelvic height (CPH) using retrograde pyelograms and performed intergroup comparisons.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>The median IPA, IW, IL, and CPH in the accessible and inaccessible group were 60.5\u00b0 and 45.6\u00b0 (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), 10.8 and 9.4\u2009mm (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), 33.2 and 36.4\u2009mm (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), and 25.9 and 30.9\u2009mm (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), respectively. IPA (OR 0.963, 95% CI 0.952\u20130.974, <jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) and IW (OR 0.519, 95% CI 0.331\u20130.816, <jats:italic>p<\/jats:italic>\u00a0=\u00a00.004) were significant risk factors of renal pelvicalyceal anatomy related to the accessibility of the lower pole calyces. The cut\u2010off value for IPA and IW was 45.8\u00b0(<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001) and 7.8\u2009mm (<jats:italic>p<\/jats:italic>\u2009&lt;\u20090.001), respectively.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>IPA\u2009&lt;\u200945.8\u00b0 and IW\u2009&lt;7.8\u2009mm were negative predictors to access the lower pole calyces when using reusable fURS during RIRS.<\/jats:p><\/jats:sec>","DOI":"10.1111\/iju.15091","type":"journal-article","created":{"date-parts":[[2022,10,28]],"date-time":"2022-10-28T14:44:15Z","timestamp":1666968255000},"page":"220-225","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":15,"title":["Pelvicalyceal anatomy on the accessibility of reusable flexible ureteroscopy to lower pole calyx during retrograde intrarenal surgery"],"prefix":"10.1111","volume":"30","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-8818-952X","authenticated-orcid":false,"given":"Takaaki","family":"Inoue","sequence":"first","affiliation":[{"name":"Department of Urology and Stone Center Hara Genitourinary Hospital  Kobe Japan"},{"name":"Division of Urology, Department of Surgery Related Kobe University Graduate School of Medicine  Kobe Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuzo","family":"Hamamoto","sequence":"additional","affiliation":[{"name":"Department of Urology, Medical School Nagoya City University Graduate School of Medical Sciences  Nagoya Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0215-2617","authenticated-orcid":false,"given":"Shinsuke","family":"Okada","sequence":"additional","affiliation":[{"name":"Department of Urology Gyotoku General Hospital  Ichikawa Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoshi","family":"Imai","sequence":"additional","affiliation":[{"name":"Department of Urology Konan Medical Center  Kobe Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2162-7756","authenticated-orcid":false,"given":"Fukashi","family":"Yamamichi","sequence":"additional","affiliation":[{"name":"Department of Urology and Stone Center Hara Genitourinary Hospital  Kobe Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Masaichiro","family":"Fujita","sequence":"additional","affiliation":[{"name":"Department of Urology and Stone Center Hara Genitourinary Hospital  Kobe Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Koki","family":"Tominaga","sequence":"additional","affiliation":[{"name":"Department of Urology and Stone Center Hara Genitourinary Hospital  Kobe 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