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    • 2. 发明授权
    • Cannula stent
    • 插管支架
    • US06743252B1
    • 2004-06-01
    • US09464895
    • 1999-12-16
    • Brian L. BatesDale T. BerryNeal E. FearnotCoy M. HeraldPalle M. HansenJesper Thyregod
    • Brian L. BatesDale T. BerryNeal E. FearnotCoy M. HeraldPalle M. HansenJesper Thyregod
    • A61F206
    • A61F2/915A61F2/91A61F2002/91516A61F2002/91525A61F2002/91533A61F2002/91575A61F2230/0054
    • A stent (10) formed from cannula and having flexible segments (11) and high hoop strength segments (12) alternating therealong. Axial tie bars (21,22) interconnect the segments; minimal length reduction would occur upon expansion. In the high hoop strength segment (12), struts (16) are initially parallel in the unexpanded strut condition, while in the flexible segment (11), struts (14) extend from a respective bight (15) to converge at distal ends when unexpanded. In one embodiment, certain adjacent struts (16) of the hoop segment are spaced apart by a large gap (20) while others are spaced apart by a small gap (18). In another embodiment all the struts (16) of the hoop segment are spaced apart uniformly from each other (or from an axial tie bar) by a small gap (23), resulting in minimizing the occurrence of fatigue of high-stress sites upon expansion/contraction cycles from continuous pulsatile events.
    • 由套管形成并具有柔性段(11)和高环箍强度段(12)的支架(10)。 轴向连杆(21,22)互连该段; 膨胀时会发生最小的长度减小。 在高箍强度段(12)中,支柱(16)最初在未膨胀的支柱状态下平行,而在柔性段(11)中,支柱(14)从相应的弯曲部(15)延伸以在远端会聚, 未膨胀 在一个实施例中,环形节段的某些相邻的支柱(16)由较大的间隙(20)间隔开,而另一些间隔开一小间隙(18)。 在另一个实施例中,环形节段的所有支柱(16)彼此均匀地(或从轴向连接杆)间隔开小间隙(23),从而最小化膨胀时高应力位点的疲劳的发生 /来自连续脉动事件的收缩周期。