公开(公告)号：US5341818A

公开(公告)日：1994-08-30

申请号：US994679

申请日：1992-12-22

申请人： Robert M. Abrams ,  Randy S. Chan ,  Janet W. Burpee ,  Clifford Teoh

发明人： Robert M. Abrams ,  Randy S. Chan ,  Janet W. Burpee ,  Clifford Teoh

IPC分类号： A61L31/02 ,  A61M25/09 ,  C22C14/00 ,  C22C30/00 ,  C22F1/00 ,  A61B5/00

CPC分类号： A61L31/14 ,  A61L31/022 ,  A61M25/09 ,  C22C14/00 ,  C22C30/00 ,  C22F1/006 ,  A61L2400/16 ,  A61M2025/09083 ,  A61M2025/09141 ,  A61M2025/09175 ,  A61M2205/0266

摘要： An improved guidewire for advancing a catheter within a body lumen which has a high strength proximal portion, a distal portion formed of superelastic alloy and a connector formed of superelastic alloy to provide a torque transmitting coupling between the distal end of the proximal portion and the proximal end of the distal portion. The superelastic alloy elements are preferably cold worked and then heat treated at a temperature well above the austenite-to-martensite transformation temperature, while being subjected to longitudinal stresses equal to about 5 to about 50% of the room temperature yield stress to impart to the metal a straight "memory". The guiding member using such improved material exhibits a stress induced austenite-to-martensite phase transformation at an exceptionally high constant yield strength of at least 70 ksi for solid members and at least 50 ksi for tubular members with a broad recoverable strain of at least about 4% during the phase transformation.

摘要翻译： 一种改进的导丝，用于将导管推进在具有高强度近端部分的体腔内，由超弹性合金形成的远端部分和由超弹性合金形成的连接器，以在近端部分的远端和近端部分之间提供扭矩传递联接 远端部分的末端。 超弹性合金元素优选是冷加工的，然后在远高于奥氏体 - 马氏体转变温度的温度下进行热处理，同时经受等于室温屈服应力的约5至约50％的纵向应力，以赋予 金属直“记忆”。 使用这种改进的材料的引导构件在固体构件具有至少70ksi的异常高的恒定屈服强度和至少50ksi的管状构件的情况下表现出应力诱导的奥氏体 - 马氏体相变，其具有至少大约的可恢复应变 在相变期间为4％。

公开(公告)号：US5913895A

公开(公告)日：1999-06-22

申请号：US867488

申请日：1997-06-02

申请人： Janet W. Burpee ,  David R. Fischell

发明人： Janet W. Burpee ,  David R. Fischell

IPC分类号： A61F2/06 ,  A61F2/90

CPC分类号： A61F2/915 ,  A61F2/91 ,  A61F2002/91558 ,  A61F2230/0054

摘要： Disclosed herein is a thin-walled cylindrical stent in which one or more of the sets of strut members are more radially rigid after stent expansion as compared to other sets of strut members. Each set of strut members consists of a multiplicity of structural struts that are connected together with the struts extending circumferentially when the stent is outwardly radially deployed within a vessel of a human body. The sets of strut members are those parts of the stent which unfold during radial expansion and provide the radially rigid structure which maintains vessel patency. This invention is a stent structure specifically designed to have enhanced radial rigidity either at the ends or the center of the stent. More radially rigid end struts reduce injury to the vessel from over expansion at the ends of the stent. The embodiment of the present invention with enhanced rigidity in the center would be particularly useful for the treatment of calcified obstructions. Enhanced rigidity can be achieved by either having a set of strut members that becomes more ring-like when radially deployed, or the strut members have a greater width as compared to other strut members of the stent.

摘要翻译： 本文公开了一种薄壁圆柱形支架，其中一组或多组支柱构件在支架膨胀之后比其他支撑构件组更为径向刚性。 每组支柱构件由多个结构支柱构成，当支架向外径向展开在人体的容器内时，支柱连结在一起，支柱沿周向延伸。 这些支柱构件是在径向膨胀期间展开的支架的那些部分，并且提供维持血管通畅的径向刚性结构。 本发明是专门设计用于在支架端部或中心具有增强的径向刚度的支架结构。 更多的径向刚性端支柱可以减小支架端部过度膨胀对血管的损伤。 在中心具有增强的刚度的本发明的实施例对于治疗钙化的障碍物将是特别有用的。 增强的刚性可以通过具有一组在径向展开时变得更环状的支柱构件来实现，或者支柱构件与支架的其他支柱构件相比具有更大的宽度。