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1. 发明申请

US20110022151A1 STENT 审中-公开
公开(公告)号：US20110022151A1
公开(公告)日：2011-01-27
申请号：US12898815
申请日：2010-10-06
申请人： Kyong-Min SHIN , Dong-Il Gwon
发明人： Kyong-Min SHIN , Dong-Il Gwon
IPC分类号： A61F2/82
CPC分类号： A61F2/04 , A61F2/852 , A61F2002/041 , A61F2230/0067 , A61F2250/0039
摘要： If smooth transportation of bile toward the duodenum is difficult due to cancerous cells growing in the bile duct or due to stricture of the bile duct, a cylindrical stent may be implanted into the stenosed site of the bile duct to enable smooth supply of bile. Conventional stents have no risk of slippage at an implanted position thereof, but suffer from invasively growing cancerous cells. Although a covered stent having a coating has been proposed to solve invasion of the growing cancerous cells, the covered stent may have a risk of slippage at an implanted position thereof and also, may cause pancreatitis and cholelithiasis. To solve the above described problems, disclosed herein is a stent to prevent backflow of food from the duodenum to the bile duct while assuring smooth transportation of bile without a risk of unwanted displacement caused by the transported bile. The stent includes a cylindrical outer stent, and a downwardly tapered inner stent covered with a polytetrafluoroethylene (PTFE) or silicone coating having biocompatibility. The inner and outer stents are coupled to each other to define a double structure.
摘要翻译：如果胆汁向十二指肠顺利运输是困难的，因为胆管内生长的癌细胞或胆管狭窄，可以将圆柱形支架植入胆管狭窄部位，以使胆汁平稳供应。常规的支架在其植入位置没有滑动的风险，但遭受侵袭性生长的癌细胞。虽然已经提出了具有涂层的覆盖支架来解决生长中的癌细胞的侵袭，但是所覆盖的支架可能在其植入位置处具有滑动的风险，并且还可能引起胰腺炎和胆石病。为了解决上述问题，本文公开了一种用于防止食物从十二指肠向胆管回流的支架，同时确保胆汁的平稳运输，而不会由于运输的胆汁引起不希望的位移。支架包括圆柱形外支架和用聚四氟乙烯（PTFE）或具有生物相容性的硅氧烷涂层覆盖的向下锥形内支架。内支架和外支架彼此连接以限定双重结构。

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