{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,30]],"date-time":"2026-04-30T07:00:54Z","timestamp":1777532454297,"version":"3.51.4"},"reference-count":28,"publisher":"Royal College of Surgeons of England","issue":"8","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["annals"],"published-print":{"date-parts":[[2022,9]]},"abstract":"<jats:sec><jats:title>Introduction<\/jats:title><jats:p> The aim of this study was to investigate factors that may predict a negative ureteroscopy (URS) performed for ureteric calculi in prestented patients and to assess preoperative imaging in reducing the rate of negative URS. <\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p> Data were collected on emergency stent placement for a ureteric calculus from April 2011 to February 2016 (Group A) and October 2016 to October 2019 (Group B). Data included patient demographics, indication for a stent, stone characteristics, baseline bloods, urine culture, readmission, negative URS rate and the use of pre-URS imaging. Multivariate logistic regression was used for statistical analysis. <\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p> Of 257 patients who underwent emergency stent insertion, 251 underwent deferred URS for a ureteric calculus and 6 avoided URS due to pre-URS imaging. Indications for stent were pain (42%), sepsis (39%) and acute kidney injury (19%). Mean stone size was 7.8mm, mean stone density was 699 Hounsfield units (HU) and the stone locations were upper (62%), mid (13%) and lower ureter (25%). The overall negative URS rate was 12%. The negative URS rate was lower in patients with pre-URS imaging compared with those with none, 6% and 14%, respectively (OR=2.33, 95% CI: 0.69\u20137.56, p=0.2214). Logistic regression analysis indicated stone size as the only significant predictor of a negative URS, where the greater the size of the stone the less likely URS would be negative (\u03b2=0.75, 95% CI: 0.60\u20130.94 p=0.011). <\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p> Utilising pre-URS imaging can lead to a reduction in negative URS rate. Stone size &lt;5mm appears to be the subgroup most likely to benefit from imaging. <\/jats:p><\/jats:sec>","DOI":"10.1308\/rcsann.2021.0260","type":"journal-article","created":{"date-parts":[[2022,2,8]],"date-time":"2022-02-08T15:07:06Z","timestamp":1644332826000},"page":"588-593","source":"Crossref","is-referenced-by-count":4,"title":["Reducing the rate of negative ureteroscopy: predictive factors and the role of preoperative imaging"],"prefix":"10.1308","volume":"104","author":[{"given":"AC","family":"Brodie","sequence":"first","affiliation":[{"name":"West Suffolk Hospital, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"TJ","family":"Johnston","sequence":"additional","affiliation":[{"name":"Royal Bournemouth Hospital, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P","family":"Lloyd","sequence":"additional","affiliation":[{"name":"West Suffolk Hospital, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L","family":"Hemsworth","sequence":"additional","affiliation":[{"name":"West Suffolk Hospital, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M","family":"Barabas","sequence":"additional","affiliation":[{"name":"University General Hospital, Czech Republic"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"SR","family":"Keoghane","sequence":"additional","affiliation":[{"name":"West Suffolk Hospital, UK"},{"name":"Colchester General Hospital, UK"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"171","reference":[{"key":"C1","author":"T\u00fcrk C","year":"2019","journal-title":"Eur Assoc Urol"},{"key":"C2","doi-asserted-by":"publisher","DOI":"10.1159\/000449510"},{"key":"C3","doi-asserted-by":"publisher","DOI":"10.1089\/end.2016.0895"},{"key":"C4","unstructured":"NHS Digital. 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Renal and ureteric stones: assessment and management (NICE guideline NG118), 2019. https:\/\/www.nice.org.uk\/guidance\/ng118."},{"key":"C28","first-page":"CD008509","volume":"4","author":"Campschroer T","year":"2018","journal-title":"Cochrane Database Syst Rev"}],"container-title":["The Annals of The Royal College of Surgeons of England"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/publishing.rcseng.ac.uk\/doi\/pdf\/10.1308\/rcsann.2021.0260","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,5,15]],"date-time":"2023-05-15T10:32:09Z","timestamp":1684146729000},"score":1,"resource":{"primary":{"URL":"https:\/\/publishing.rcseng.ac.uk\/doi\/10.1308\/rcsann.2021.0260"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2022,9]]},"references-count":28,"journal-issue":{"issue":"8","published-print":{"date-parts":[[2022,9]]}},"alternative-id":["10.1308\/rcsann.2021.0260"],"URL":"https:\/\/doi.org\/10.1308\/rcsann.2021.0260","relation":{},"ISSN":["0035-8843","1478-7083"],"issn-type":[{"value":"0035-8843","type":"print"},{"value":"1478-7083","type":"electronic"}],"subject":[],"published":{"date-parts":[[2022,9]]}}}