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    • 4. 发明申请
    • METHOD AND APPARATUS FOR INCREASING ROTATIONAL AMPLITUDE OF ABRASIVE ELEMENT ON HIGH-SPEED ROTATIONAL ATHERECTOMY DEVICE
    • 用于增加高速旋转装置的磨耗元件旋转振幅的方法和装置
    • US20090264908A1
    • 2009-10-22
    • US12405765
    • 2009-03-17
    • Michael J. KallokGary M. Petrucci
    • Michael J. KallokGary M. Petrucci
    • A61B17/22
    • A61B17/320758A61B2017/22042A61B2017/320004A61B2017/320766
    • A high-speed atherectomy device is disclosed, for abrading a blockage (stenosis) in the interior of a lumen (artery). The device uses a rapidly rotating drive shaft that includes an eccentric abrasive element that has its center of mass laterally offset from the rotational axis of the drive shaft. As the drive shaft rotates, centrifugal force drives the eccentric abrasive element outward, so that it traces an abrading diameter at high rotational speeds that is larger than its rest diameter. The drive shaft includes counterweights on both sides of the abrasive element, which may stabilize operation at high rotational speeds. In some cases, the counterweights are also eccentric, with their centers of mass laterally offset from the rotational axis in the opposite direction as that of the abrasive element. The counterweights are longitudinally separated from the abrasive element, and in some cases, the separations are adjustable and/or controllable. In some cases, the guide wire may be retracted prior to or during the high-speed rotation of the drive shaft, with the retraction being to the distal counterweight, the abrasive element, the proximal counterweight, or beyond the proximal counterweight.
    • 公开了一种用于研磨内腔(动脉)内部的阻塞(狭窄)的高速粥样斑块切除装置。 该装置使用快速旋转的驱动轴,其包括偏心研磨元件,该偏心研磨元件的质心横向偏离驱动轴的旋转轴线。 当驱动轴旋转时,离心力将偏心研磨元件向外驱动,使其以高于其静止直径的高旋转速度跟踪研磨直径。 驱动轴包括研磨元件的两侧的配重,其可以在高转速下稳定操作。 在一些情况下,配重也是偏心的,其质心中心与旋转轴线沿与研磨元件相反的方向横向偏移。 配重与研磨元件纵向分离,并且在一些情况下,分离是可调节的和/或可控制的。 在一些情况下,导丝可以在驱动轴的高速旋转之前或期间缩回,其中缩回是远端配重,研磨元件,近侧配重或超过近侧配重。