{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T09:56:55Z","timestamp":1791280615138,"version":"4.1.0"},"reference-count":22,"publisher":"Springer Science and Business Media LLC","issue":"1","license":[{"start":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T00:00:00Z","timestamp":1791244800000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.springernature.com\/gp\/researchers\/text-and-data-mining"},{"start":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T00:00:00Z","timestamp":1791244800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/www.springernature.com\/gp\/researchers\/text-and-data-mining"}],"content-domain":{"domain":["link.springer.com"],"crossmark-restriction":false},"short-container-title":["Urolithiasis"],"DOI":"10.1007\/s00240-026-02050-w","type":"journal-article","created":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T09:40:53Z","timestamp":1791279653000},"update-policy":"https:\/\/doi.org\/10.1007\/springer_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Preoperative CT-based markers and inflammatory parameters as predictors of failed ureteroscopic access in unstented patients with ureteral stones: a prospective single-center cohort study"],"prefix":"10.1007","volume":"54","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9236-5730","authenticated-orcid":false,"given":"Khaled M.","family":"Abdelhalim","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Esam A.","family":"Ahmed","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ezzat A.","family":"Ismail","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Isaac S.","family":"Wasfy","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"297","published-online":{"date-parts":[[2026,10,6]]},"reference":[{"key":"2050_CR1","doi-asserted-by":"publisher","first-page":"2418","DOI":"10.1016\/j.juro.2007.09.107","volume":"178","author":"GM Preminger","year":"2007","unstructured":"Preminger GM, Tiselius H-G, Assimos DG, Alken P, Buck C, Gallucci M et al (2007) 2007 guideline for the management of ureteral calculi. J Urol 178:2418\u20132434. https:\/\/doi.org\/10.1016\/j.juro.2007.09.107","journal-title":"J Urol"},{"key":"2050_CR2","doi-asserted-by":"publisher","first-page":"1153","DOI":"10.1016\/j.juro.2016.05.090","volume":"196","author":"D Assimos","year":"2016","unstructured":"Assimos D, Krambeck A, Miller NL, Monga M, Murad MH, Nelson CP et al (2016) Surgical management of stones: American Urological Association\/Endourological Society guideline, part I. J Urol 196:1153\u20131160. https:\/\/doi.org\/10.1016\/j.juro.2016.05.090","journal-title":"J Urol"},{"key":"2050_CR3","doi-asserted-by":"publisher","first-page":"475","DOI":"10.1016\/j.eururo.2015.07.041","volume":"69","author":"C T\u00fcrk","year":"2016","unstructured":"T\u00fcrk C, Pet\u0159\u00edk A, Sarica K, Seitz C, Skolarikos A, Straub M et al (2016) EAU guidelines on interventional treatment for urolithiasis. Eur Urol 69:475\u2013482. https:\/\/doi.org\/10.1016\/j.eururo.2015.07.041","journal-title":"Eur Urol"},{"key":"2050_CR4","doi-asserted-by":"publisher","first-page":"675","DOI":"10.1007\/s00345-016-1909-0","volume":"35","author":"BK Somani","year":"2017","unstructured":"Somani BK, Giusti G, Sun Y, Osther PJ, Frank M, De Sio M et al (2017) Complications associated with ureterorenoscopy (URS) related to treatment of urolithiasis: the Clinical Research Office of Endourological Society URS Global study. World J Urol 35:675\u2013681. https:\/\/doi.org\/10.1007\/s00345-016-1909-0","journal-title":"World J Urol"},{"key":"2050_CR5","doi-asserted-by":"publisher","first-page":"41","DOI":"10.1007\/s00240-023-01410-0","volume":"51","author":"K Morgan","year":"2023","unstructured":"Morgan K, Possoit H, Conelly Z, Frilot CF, Khater N, Gomelsky A (2023) Predicting failed access in unstented ureteroscopy. Urolithiasis 51:41. https:\/\/doi.org\/10.1007\/s00240-023-01410-0","journal-title":"Urolithiasis"},{"key":"2050_CR6","doi-asserted-by":"publisher","first-page":"913","DOI":"10.1007\/s00345-018-2461-x","volume":"37","author":"T Yoshida","year":"2019","unstructured":"Yoshida T, Inoue T, Taguchi M, Omura N, Kinoshita H, Matsuda T (2019) Ureteral wall thickness as a significant factor in predicting spontaneous passage of ureteral stones of \u2264\u200910\u00a0mm: a preliminary report. World J Urol 37:913\u2013919. https:\/\/doi.org\/10.1007\/s00345-018-2461-x","journal-title":"World J Urol"},{"key":"2050_CR7","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 et al (2017) Ureteral wall thickness as a preoperative indicator of impacted stones in patients with ureteral stones undergoing ureteroscopic lithotripsy. Urology 106:45\u201349. https:\/\/doi.org\/10.1016\/j.urology.2017.04.047","journal-title":"Urology"},{"key":"2050_CR8","doi-asserted-by":"publisher","first-page":"117","DOI":"10.1177\/03915603231189618","volume":"91","author":"T Morena","year":"2024","unstructured":"Morena T, Vismara Fugini A, Veccia A, Riva M, Peroni A (2024) Outcomes of primary ureteroscopic lithotripsy: the role of maximum ureteral wall thickness at the site of stone impaction. Urologia 91:117\u2013124. https:\/\/doi.org\/10.1177\/03915603231189618","journal-title":"Urologia"},{"key":"2050_CR9","doi-asserted-by":"publisher","first-page":"430","DOI":"10.1097\/JU.0000000000003561","volume":"210","author":"NS Dean","year":"2023","unstructured":"Dean NS, Millan B, Uy M, Albers P, Campbell SM, Krambeck AE et al (2023) Ureteral wall thickness is an effective predictor of ureteral stone impaction and management outcomes: a systematic review and meta-analysis. J Urol 210:430\u2013437. https:\/\/doi.org\/10.1097\/JU.0000000000003561","journal-title":"J Urol"},{"key":"2050_CR10","doi-asserted-by":"publisher","first-page":"307","DOI":"10.1016\/j.ajur.2021.11.006","volume":"9","author":"E Demirelli","year":"2022","unstructured":"Demirelli E, \u00d6\u011freden E, Bayraktar C, Tosun A, O\u011fuz U (2022) The effect of perirenal fat stranding on infectious complications after ureterorenoscopy in patients with ureteral calculi. Asian J Urol 9:307\u2013312. https:\/\/doi.org\/10.1016\/j.ajur.2021.11.006","journal-title":"Asian J Urol"},{"key":"2050_CR11","first-page":"9","volume":"1","author":"L Naing","year":"2006","unstructured":"Naing L, Winn T, Rusli BN (2006) Practical issues in calculating the sample size for prevalence studies. Arch Orofac Sci 1:9\u201314","journal-title":"Arch Orofac Sci"},{"key":"2050_CR12","doi-asserted-by":"publisher","first-page":"1149","DOI":"10.3758\/BRM.41.4.1149","volume":"41","author":"F Faul","year":"2009","unstructured":"Faul F, Erdfelder E, Buchner A, Lang A-G (2009) Statistical power analyses using G*Power 3.1: Tests for correlation and regression analyses. Behav Res Methods 41:1149\u20131160. https:\/\/doi.org\/10.3758\/BRM.41.4.1149","journal-title":"Behav Res Methods"},{"key":"2050_CR13","doi-asserted-by":"publisher","first-page":"18546","DOI":"10.1038\/s41598-020-75672-8","volume":"10","author":"L Boeri","year":"2020","unstructured":"Boeri L, Fulgheri I, Palmisano F, Lievore E, Lorusso V, Ripa F et al (2020) Hounsfield unit attenuation value can differentiate pyonephrosis from hydronephrosis and predict septic complications in patients with obstructive uropathy. Sci Rep 10:18546. https:\/\/doi.org\/10.1038\/s41598-020-75672-8","journal-title":"Sci Rep"},{"key":"2050_CR14","doi-asserted-by":"publisher","first-page":"e0122454","DOI":"10.1371\/journal.pone.0122454","volume":"10","author":"XR Cai","year":"2015","unstructured":"Cai XR, Zhou QC, Yu J, Feng YZ, Xian ZH, Yang WC et al (2015) Assessment of renal function in patients with unilateral ureteral obstruction using whole-organ perfusion imaging with 320-detector row computed tomography. PLoS ONE 10:e0122454. https:\/\/doi.org\/10.1371\/journal.pone.0122454","journal-title":"PLoS ONE"},{"key":"2050_CR15","doi-asserted-by":"publisher","first-page":"137","DOI":"10.2147\/IJGM.S133685","volume":"10","author":"H Fukami","year":"2017","unstructured":"Fukami H, Takeuchi Y, Kagaya S, Ojima Y, Saito A, Sato H et al (2017) Perirenal fat stranding is not a powerful diagnostic tool for acute pyelonephritis. Int J Gen Med 10:137\u2013144. https:\/\/doi.org\/10.2147\/IJGM.S133685","journal-title":"Int J Gen Med"},{"key":"2050_CR16","doi-asserted-by":"publisher","first-page":"2409","DOI":"10.1002\/sim.1047","volume":"21","author":"G Heinze","year":"2002","unstructured":"Heinze G, Schemper M (2002) A solution to the problem of separation in logistic regression. Stat Med 21:2409\u20132419. https:\/\/doi.org\/10.1002\/sim.1047","journal-title":"Stat Med"},{"key":"2050_CR17","doi-asserted-by":"publisher","first-page":"837","DOI":"10.2307\/2531595","volume":"44","author":"ER DeLong","year":"1988","unstructured":"DeLong ER, DeLong DM, Clarke-Pearson DL (1988) Comparing the areas under two or more correlated receiver operating characteristic curves: a nonparametric approach. Biometrics 44:837\u2013845. https:\/\/doi.org\/10.2307\/2531595","journal-title":"Biometrics"},{"key":"2050_CR18","doi-asserted-by":"publisher","first-page":"565","DOI":"10.1177\/0272989X06295361","volume":"26","author":"AJ Vickers","year":"2006","unstructured":"Vickers AJ, Elkin EB (2006) Decision curve analysis: a novel method for evaluating prediction models. Med Decis Mak 26:565\u2013574. https:\/\/doi.org\/10.1177\/0272989X06295361","journal-title":"Med Decis Mak"},{"key":"2050_CR19","doi-asserted-by":"publisher","first-page":"652","DOI":"10.1089\/end.2024.0862","volume":"39","author":"A Sezer","year":"2025","unstructured":"Sezer A, Turedi B, Bulbul E, Yasar H, Sar\u0131ca K (2025) Ureteral stone impaction with its possible effects on the outcomes of endoscopic management in children: a critical evaluation with an emphasis on ureteral wall thickness. J Endourol 39:652\u2013658. https:\/\/doi.org\/10.1089\/end.2024.0862","journal-title":"J Endourol"},{"key":"2050_CR20","doi-asserted-by":"publisher","first-page":"41","DOI":"10.1007\/s11934-025-01270-8","volume":"26","author":"AD Cumpanas","year":"2025","unstructured":"Cumpanas AD, Vu TN, Tran CM, Patel RM (2025) Ureteral wall thickness measurement and spontaneous stone passage a narrative review. Curr Urol Rep 26:41. https:\/\/doi.org\/10.1007\/s11934-025-01270-8","journal-title":"Curr Urol Rep"},{"key":"2050_CR21","doi-asserted-by":"publisher","first-page":"87","DOI":"10.1007\/s00240-024-01583-2","volume":"52","author":"CM Van Horn","year":"2024","unstructured":"Van Horn CM, Iovanel G, Atwater B, Engelberg R, Sobieh A, Sorokin I (2024) Perinephric fat stranding is associated with increased age and stone size but not with serum creatinine in patients with obstructing ureterolithiasis. Urolithiasis 52:87. https:\/\/doi.org\/10.1007\/s00240-024-01583-2","journal-title":"Urolithiasis"},{"key":"2050_CR22","doi-asserted-by":"publisher","first-page":"120","DOI":"10.1007\/s00240-024-01616-w","volume":"52","author":"H Wei","year":"2024","unstructured":"Wei H, Shi X, Xu C, Li W, Zhang T, Huang Z et al (2024) Predictive value of NCCT quantitative analysis for proximal and middle impacted ureteral stones. Urolithiasis 52:120. https:\/\/doi.org\/10.1007\/s00240-024-01616-w","journal-title":"Urolithiasis"}],"container-title":["Urolithiasis"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00240-026-02050-w.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/article\/10.1007\/s00240-026-02050-w","content-type":"text\/html","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/link.springer.com\/content\/pdf\/10.1007\/s00240-026-02050-w.pdf","content-type":"application\/pdf","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T09:40:54Z","timestamp":1791279654000},"score":1,"resource":{"primary":{"URL":"https:\/\/link.springer.com\/10.1007\/s00240-026-02050-w"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,10,6]]},"references-count":22,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2026,12]]}},"alternative-id":["2050"],"URL":"https:\/\/doi.org\/10.1007\/s00240-026-02050-w","relation":{},"ISSN":["2194-7236"],"issn-type":[{"value":"2194-7236","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,10,6]]},"assertion":[{"value":"2 March 2026","order":1,"name":"received","label":"Received","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"30 August 2026","order":2,"name":"accepted","label":"Accepted","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"6 October 2026","order":3,"name":"first_online","label":"First Online","group":{"name":"ArticleHistory","label":"Article History"}},{"value":"The authors declare no competing interests.","order":1,"name":"Ethics","label":"Competing interests","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"This study was approved by the Institutional Ethics Committee of the Faculty of Medicine, Suez Canal University (approval number 5626\/2024) and was conducted in accordance with the 1964 Declaration of Helsinki and its later amendments.","order":2,"name":"Ethics","label":"Ethics approval","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Not applicable.","order":3,"name":"Ethics","label":"Consent for publication","group":{"name":"EthicsHeading","label":"Declarations"}},{"value":"Written informed consent was obtained from all individual participants included in the study.","order":4,"name":"Ethics","label":"Informed consent","group":{"name":"EthicsHeading","label":"Declarations"}}],"article-number":"166"}}