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    • 10. 发明申请
    • BIDIRECTIONAL EXPANDABLE HEAD FOR ROTATIONAL ATHERECTOMY DEVICE
    • 双向可扩展头部用于旋转性能装置
    • WO2009148805A1
    • 2009-12-10
    • PCT/US2009/044299
    • 2009-05-18
    • CARDIOVASCULAR SYSTEMS, INC.WELLY, RyanPLOWE, ChuckPIIPPO, CassandraBAKKEN, Todd, JamesDARLEY, Jesse, C.
    • WELLY, RyanPLOWE, ChuckPIIPPO, CassandraBAKKEN, Todd, JamesDARLEY, Jesse, C.
    • A61B17/32
    • A61B17/320725A61B17/320758A61B2017/320004
    • A rotational atherectomy device that includes an expandable head that can clean a blockage from vessel larger than its rest diameter, in which the drive shaft may rotate in two opposite directions and may have different abrasive characteristics for each rotation direction. In one direction, the head may be configured for cutting and/or slicing, which may be well suited to removing particularly soft blockage material. In the other direction, the head may be configured for grinding, scraping and/or sanding, which may be well suited to removing particularly hard blockage material. The head includes one or more arms that are pivotally or hingedly attached to the drive shaft. One or more abrasive elements are disposed on or are attached to the one or more arms. The abrasive elements have a cutting feature, such as a sharpened edge that cuts like a razor blade when the drive shaft is rotated in the "cutting" direction. The abrasive elements also have a grinding feature, such as an abrasive material disposed on the abrasive element adjacent to the sharpened edge, which grinds away a blockage when the drive shaft is rotated in the "grinding" direction.
    • 一种旋转粥样斑块切除装置,其包括可以从容器清洁大于其静止直径的容器堵塞的可扩张头部,其中驱动轴可沿两个相反的方向旋转,并且可以对于每个旋转方向具有不同的研磨特性。 在一个方向上,头部可以被配置用于切割和/或切片,其可以非常适合于去除特别柔软的阻塞材料。 在另一个方向上,头可以被配置用于研磨,刮擦和/或打磨,这可能非常适合于去除特别硬的堵塞材料。 头包括一个或多个枢转地或铰接地附接到驱动轴的臂。 一个或多个研磨元件设置在一个或多个臂上或附接到一个或多个臂。 研磨元件具有切割特征,例如当驱动轴沿“切割”方向旋转时切割成剃刀刀片的锋利边缘。 研磨元件还具有研磨特征,例如设置在与磨边相邻的研磨元件上的研磨材料,当磨削轴沿“研磨”方向旋转时,其研磨堵塞。