{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T20:26:27Z","timestamp":1791923187669,"version":"4.3.4"},"reference-count":22,"publisher":"Wiley","issue":"S2","license":[{"start":{"date-parts":[[2013,4,25]],"date-time":"2013-04-25T00:00:00Z","timestamp":1366848000000},"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":[[2013,5]]},"abstract":"Background<\/jats:title>Plastic stent (PS<\/jats:styled-content>) occlusion occurs as a result of bacterial adherence to the stent's inner wall. To retain the bacteriological barrier, placing a PS<\/jats:styled-content> above the sphincter of O<\/jats:styled-content>ddi (\u2018inside stent\u2019) has been investigated. We designed a new PS<\/jats:styled-content> (inside stent with thread [IT<\/jats:styled-content>] stent) with attachable nylon thread for use as an inside stent and for easy retrieval. The present study evaluated the IT<\/jats:styled-content> stent's technical feasibility and efficacy for malignant hilar biliary obstruction.<\/jats:p><\/jats:sec>Patients and Methods<\/jats:title>A total of 26 consecutive patients with unresectable malignant hilar biliary obstruction underwent placement of IT<\/jats:styled-content> stents from A<\/jats:styled-content>ugust 2007 to F<\/jats:styled-content>ebruary 2011. IT<\/jats:styled-content> stents were placed across the strictures without sphincterotomy to achieve bilateral drainage.<\/jats:p><\/jats:sec>Results<\/jats:title>The overall technical success rate of the IT<\/jats:styled-content> stent was 100% for one session. Multiple IT<\/jats:styled-content> stents were inserted in 25 cases(two stents in 15 patients, three stents in 10 patients). No stent\u2010related early complications occurred. The functional success rate was 92% (24\/26). The rate of reintervention because of stent malfunction was 50% (13\/26). In all 16 patients who underwent stent removal, IT<\/jats:styled-content> stents were easily retrieved using the nylon thread. According to K<\/jats:styled-content>aplan\u2013M<\/jats:styled-content>eier analysis, the median stent patency period was 136 days.<\/jats:p><\/jats:sec>Conclusion<\/jats:title>IT<\/jats:styled-content> stents for endoscopic placement above the sphincter of O<\/jats:styled-content>ddi can be used safely and effectively for malignant hilar biliary obstruction.<\/jats:p><\/jats:sec>","DOI":"10.1111\/den.12080","type":"journal-article","created":{"date-parts":[[2013,4,26]],"date-time":"2013-04-26T01:12:22Z","timestamp":1366938742000},"page":"94-99","source":"Crossref","is-referenced-by-count":56,"title":["Newly designed plastic stent for endoscopic placement above the sphincter of O<\/scp>ddi in patients with malignant hilar biliary obstruction"],"prefix":"10.1111","volume":"25","author":[{"given":"Hirotoshi","family":"Ishiwatari","sequence":"first","affiliation":[{"name":"Fourth Department of Internal Medicine Sapporo Medical University School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tsuyoshi","family":"Hayashi","sequence":"additional","affiliation":[{"name":"Fourth Department of Internal Medicine Sapporo Medical University School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michihiro","family":"Ono","sequence":"additional","affiliation":[{"name":"Fourth Department of Internal Medicine Sapporo Medical University School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tsutomu","family":"Sato","sequence":"additional","affiliation":[{"name":"Fourth Department of Internal Medicine Sapporo Medical University School of Medicine Sapporo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Junji","family":"Kato","sequence":"additional","affiliation":[{"name":"Fourth Department of Internal Medicine Sapporo Medical University School of Medicine Sapporo 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