PMID- 27570427 OWN - NLM STAT- MEDLINE DCOM- 20170419 LR - 20181113 IS - 2219-2840 (Electronic) IS - 1007-9327 (Print) IS - 1007-9327 (Linking) VI - 22 IP - 30 DP - 2016 Aug 14 TI - Evaluation of anti-migration properties of biliary covered self-expandable metal stents. PG - 6917-24 LID - 10.3748/wjg.v22.i30.6917 [doi] AB - AIM: To assess anti-migration potential of six biliary covered self-expandable metal stents (C-SEMSs) by using a newly designed phantom model. METHODS: In the phantom model, the stent was placed in differently sized holes in a silicone wall and retracted with a retraction robot. Resistance force to migration (RFM) was measured by a force gauge on the stent end. Radial force (RF) was measured with a RF measurement machine. Measured flare structure variables were the outer diameter, height, and taper angle of the flare (ODF, HF, and TAF, respectively). Correlations between RFM and RF or flare variables were analyzed using a linear correlated model. RESULTS: Out of the six stents, five stents were braided, the other was laser-cut. The RF and RFM of each stent were expressed as the average of five replicate measurements. For all six stents, RFM and RF decreased as the hole diameter increased. For all six stents, RFM and RF correlated strongly when the stent had not fully expanded. This correlation was not observed in the five braided stents excluding the laser cut stent. For all six stents, there was a strong correlation between RFM and TAF when the stent fully expanded. For the five braided stents, RFM after full stent expansion correlated strongly with all three stent flare structure variables (ODF, HF, and TAF). The laser-cut C-SEMS had higher RFMs than the braided C-SEMSs regardless of expansion state. CONCLUSION: RF was an important anti-migration property when the C-SEMS did not fully expand. Once fully expanded, stent flare structure variables plays an important role in anti-migration. FAU - Minaga, Kosuke AU - Minaga K AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Kitano, Masayuki AU - Kitano M AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Imai, Hajime AU - Imai H AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Harwani, Yogesh AU - Harwani Y AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Yamao, Kentaro AU - Yamao K AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Kamata, Ken AU - Kamata K AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Miyata, Takeshi AU - Miyata T AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Omoto, Shunsuke AU - Omoto S AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Kadosaka, Kumpei AU - Kadosaka K AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Sakurai, Toshiharu AU - Sakurai T AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Nishida, Naoshi AU - Nishida N AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. FAU - Kudo, Masatoshi AU - Kudo M AD - Kosuke Minaga, Masayuki Kitano, Hajime Imai, Yogesh Harwani, Kentaro Yamao, Ken Kamata, Takeshi Miyata, Shunsuke Omoto, Kumpei Kadosaka, Toshiharu Sakurai, Naoshi Nishida, Masatoshi Kudo, Department of Gastroenterology and Hepatology, Kindai University Faculty of Medicine, Osaka-Sayama 589-8511, Japan. LA - eng PT - Journal Article PL - United States TA - World J Gastroenterol JT - World journal of gastroenterology JID - 100883448 RN - 0 (Metals) SB - IM MH - Cholestasis/*therapy MH - Foreign-Body Migration/prevention & control MH - Humans MH - Metals MH - *Stents MH - Stress, Mechanical PMC - PMC4974589 OTO - NOTNLM OT - Anti-migration property OT - Biliary stricture OT - Radial force OT - Resistance force to migration OT - Self-expandable metal stent EDAT- 2016/08/30 06:00 MHDA- 2017/04/20 06:00 PMCR- 2016/08/14 CRDT- 2016/08/30 06:00 PHST- 2016/02/17 00:00 [received] PHST- 2016/04/04 00:00 [revised] PHST- 2016/04/15 00:00 [accepted] PHST- 2016/08/30 06:00 [entrez] PHST- 2016/08/30 06:00 [pubmed] PHST- 2017/04/20 06:00 [medline] PHST- 2016/08/14 00:00 [pmc-release] AID - 10.3748/wjg.v22.i30.6917 [doi] PST - ppublish SO - World J Gastroenterol. 2016 Aug 14;22(30):6917-24. doi: 10.3748/wjg.v22.i30.6917.