{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T08:21:05Z","timestamp":1740126065354,"version":"3.37.3"},"reference-count":22,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2017,7,20]],"date-time":"2017-07-20T00:00:00Z","timestamp":1500508800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Digestive Endoscopy"],"published-print":{"date-parts":[[2018,1]]},"abstract":"<jats:sec><jats:title>Background and Aim<\/jats:title><jats:p>In patients with irretrievable or intractable bile duct stone, temporary insertion of a plastic stent (<jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content>) followed by further endoscopic retrograde cholangiopancreatography (<jats:styled-content style=\"fixed-case\">ERCP<\/jats:styled-content>) or surgery has been recommended as a \u2018bridge\u2019 therapy. However, the exact mechanism of stone fragmentation has not been discovered. The aim of the present study was to evaluate whether <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content> shape can facilitate stone fragmentation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Using a new <jats:italic>in\u00a0vitro<\/jats:italic> bile flow phantom model, we compared the friction effect among three different <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content> groups (straight <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content> group, double pigtail\u2010shaped <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content> group, and screw\u2010shaped <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content> group) and a control group. Each group had 10 silicon tube blocks that separately contained one stone and two <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content>. The control group had 10 blocks each with only a stone and no <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content>. We carried out analysis of the friction effect by stone weight and volume changes among the groups, excluding fragmented stones.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>After 8 weeks, complete fragmentation was noted in one out of 34 cholesterol stones (2.9%) and in four out of six pigmented stones (66.7%). Fragmentation tended to be more prominent in the screw\u2010shaped <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content> group than in the straight <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content> group, double pigtail\u2010shaped group, and control group (volume change: \u221211.33%, 7.94%, 4.43%, and 2.05%, respectively, <jats:italic>P<\/jats:italic>\u00a0=\u00a00.1390; weight change: \u22129.30%, 0.71%, \u22120.10%, and \u22121.23%, respectively, <jats:italic>P<\/jats:italic>\u00a0=\u00a00.3553).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Stone fragmentation may be induced by <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content> friction effect. Also, screw\u2010shaped plastic stents may improve friction effect. These results may help guide future <jats:styled-content style=\"fixed-case\">PS<\/jats:styled-content> development and clinical decisions.<\/jats:p><\/jats:sec>","DOI":"10.1111\/den.12906","type":"journal-article","created":{"date-parts":[[2017,6,16]],"date-time":"2017-06-16T17:16:41Z","timestamp":1497633401000},"page":"107-113","source":"Crossref","is-referenced-by-count":3,"title":["Experimental study on the friction effect of plastic stents for biliary stone fragmentation (with video)"],"prefix":"10.1111","volume":"30","author":[{"given":"Chang\u2010Il","family":"Kwon","sequence":"first","affiliation":[{"name":"Digestive Disease Center CHA Bundang Medical Center CHA University Seongnam Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Gwangil","family":"Kim","sequence":"additional","affiliation":[{"name":"Department of Pathology CHA Bundang Medical Center CHA University Seongnam Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-6178-8338","authenticated-orcid":false,"given":"Seok","family":"Jeong","sequence":"additional","affiliation":[{"name":"Division of Gastroenterology Department of Internal Medicine Inha University School of Medicine Incheon Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sung Hoon","family":"Choi","sequence":"additional","affiliation":[{"name":"Digestive Disease Center CHA Bundang Medical Center CHA University Seongnam Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kwang Hyun","family":"Ko","sequence":"additional","affiliation":[{"name":"Digestive Disease Center CHA Bundang Medical Center CHA University Seongnam Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Don Haeng","family":"Lee","sequence":"additional","affiliation":[{"name":"Division of Gastroenterology Department of Internal Medicine Inha University School of Medicine Incheon Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joo Young","family":"Cho","sequence":"additional","affiliation":[{"name":"Digestive Disease Center CHA Bundang Medical Center CHA University Seongnam Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Sung Pyo","family":"Hong","sequence":"additional","affiliation":[{"name":"Digestive Disease Center CHA Bundang Medical Center CHA University Seongnam Korea"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2017,7,20]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1136\/gut.2007.121657"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1055\/s-0031-1291633"},{"key":"e_1_2_7_4_1","first-page":"50","article-title":"Biliary endoprostheses for the management of retained common bile duct stones","volume":"79","author":"Siegel JH","year":"1984","journal-title":"Am. 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