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    • 12. 发明授权
    • Unitary intravascular defibrillating catheter with separate bipolar
sensing
    • 单一血管内除颤导管与单独的双极感应
    • US5044375A
    • 1991-09-03
    • US447908
    • 1989-12-08
    • Stanley M. Bach, Jr.J. Edward ShaplandDouglas J. LangRoger W. Dahl
    • Stanley M. Bach, Jr.J. Edward ShaplandDouglas J. LangRoger W. Dahl
    • A61N1/05A61N1/39
    • A61N1/3918A61N1/056
    • A cardioversion system includes a bipolar sensing circuit with two sensing electrodes, and a cardioversion circuit with two spaced apart spring electrodes. The sensing electrodes are spaced apart from one another but kept sufficiently close to one another for isolated, localized R-wave sensing. The sensing electrodes further are positioned remotely of the cardioversion electrodes, to avoid post-shock abnormalities which otherwise would interfere with a timely R-wave sensing, to substantially prevent the discharge of an unnecessary cardioversion pulse after return of the heart to normal cardiac rhythm. One preferred version of the system is a unitary catheter including a distal tip electrode and ring electrode as the sensing electrodes, and to substantially larger, more proximal spring electrodes for defibrillation. Alternatively, the defibrillation electrodes and the sensing electrodes can be provided on two separate catheters. Yet another alternative involves providing one or more patch electrodes as defibrillation electrodes.
    • 复律系统包括具有两个感测电极的双极感测电路和具有两个间隔开的弹簧电极的心电复律电路。 感测电极彼此间隔开,但彼此保持足够接近以进行隔离的局部R波感测。 检测电极进一步位于心复律电极的远端,以避免后期的异常,否则会干扰及时的R波检测,从而基本上防止在心脏恢复正常的心脏节律之后放出不必要的心脏复律脉冲。 系统的一个优选方案是整体导管,其包括作为感测电极的远侧末端电极和环形电极,以及用于除颤的基本上较大的更近的弹簧电极。 或者,除颤电极和感测电极可以设置在两个分开的导管上。 另一替代方案涉及提供一个或多个贴片电极作为除颤电极。