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    • 31. 发明授权
    • Guide wire brake
    • 导丝制动
    • US06503227B1
    • 2003-01-07
    • US09624429
    • 2000-07-24
    • Zihong GuoVerivada Chandrasekaran
    • Zihong GuoVerivada Chandrasekaran
    • A61B1700
    • A61B17/320758A61B2017/00469A61B2017/22049A61B2017/22075
    • An improved guide wire brake that is particularly suited to ablative rotational atherectomy devices is disclosed. The guide wire brake ensures that a guide wire is prevented from rotating or moving axially prior to activation of a primary mover such as a turbine. In one embodiment a pressure relief valve delays the activation of the prime mover on start up, and a check valve delays the release of the guide wire brake on shut down. In a second embodiment the guide wire brake is serially connected to the prime mover such that the prime mover is not connected to the pressurized gas source until after the guide wire brake is engaged. In a third embodiment a guide wire is disposed through a flexible tube within a rigid cylinder that is serially connected to the prime mover, such that when pressurized gas is provided to the prime mover the flexible tube will collapse on the guide wire, to prevent guide wire movement. In a fourth embodiment a mechanical brake, in a single action, engages the guide wire prior to opening a flow path between the pressurized gas source and the prime mover. Methods for manually bypassing the guide wire brake are also disclosed.
    • 公开了一种特别适用于消融性旋切体切除装置的改进的导丝线制动器。 引导线制动器确保在诸如涡轮机的初级动子的启动之前防止导丝旋转或轴向移动。 在一个实施例中,减压阀在启动时延迟原动机的启动,并且止回阀在关闭时延迟引导线制动器的释放。 在第二实施例中,引导线制动器串联连接到原动机,使得原动机不连接到加压气体源,直到在引导线制动器接合之后。 在第三实施例中,引导线通过柔性管道设置在刚性圆柱体内,该刚性圆柱体串联连接到原动机,使得当加压气体被提供给原动机时,柔性管将在引导线上塌陷,以防止引导 电线运动。 在第四实施例中,在打开加压气体源和原动机之间的流动路径之前,在一个动作中的机械制动器接合导丝。 还公开了手动绕过导丝线制动器的方法。