发明授权
US08512391B2 Helical stent having struts in a transition zone that progressively increase in length
有权
螺旋支架在过渡区域中具有长度逐渐增加的支柱
- 专利标题: Helical stent having struts in a transition zone that progressively increase in length
- 专利标题(中): 螺旋支架在过渡区域中具有长度逐渐增加的支柱
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申请号: US11074806申请日: 2005-03-08
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公开(公告)号: US08512391B2公开(公告)日: 2013-08-20
- 发明人: Thomas O. Bales, Jr. , Peter K. Kratsch , Kenneth E. Perry
- 申请人: Thomas O. Bales, Jr. , Peter K. Kratsch , Kenneth E. Perry
- 申请人地址: US NJ Murray Hill
- 专利权人: C. R. Bard, Inc.
- 当前专利权人: C. R. Bard, Inc.
- 当前专利权人地址: US NJ Murray Hill
- 代理机构: Rutan & Tucker, LLP
- 主分类号: A61F2/88
- IPC分类号: A61F2/88
摘要:
A stent includes a central portion of helically wound undulations formed of struts, cylindrical end portions, and transition zones between the helical portion and the cylindrical portions. According to a first aspect of the invention, the torsional flexibility of the stent is maximized by having bridges connecting adjacent winding be interrupted by the maximum possible number of undulations. In a preferred design, each winding includes nineteen undulations around the circumference, bridges are provided every five undulations. According to a second aspect of the invention, uniform opening of the transition zone is achieved by altering the width, and thereby the flexibility, of a series of struts in accordance with their lengths. Specifically, the long transition zone struts are made wider.