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    • 1. 发明申请
    • HEADER EMBEDDED FILTER FOR IMPLANTABLE MEDICAL DEVICE
    • 用于可植入医疗器械的HEADER嵌入式过滤器
    • US20130073020A1
    • 2013-03-21
    • US13233966
    • 2011-09-15
    • Gabriel A. MouchawarRamez ShehadaXiaoyi Min
    • Gabriel A. MouchawarRamez ShehadaXiaoyi Min
    • A61N1/00
    • A61N1/3718A61N1/3754
    • A filter circuit embedded into a header of an implantable medical device attenuates energy that may otherwise enter the implantable medical device. At MRI frequencies, the impedance of the filter circuit is much higher than the impedance of the feedthrough capacitor of the implantable medical device. Thus, MRI-induced current that would otherwise enter the implantable medical device is limited by the filter circuit. Consequently, localized device heating that may otherwise occur during MRI scanning is significantly reduced by operation of the filter circuit. In some implementations, the header embedded filter circuit is electrically isolated from the header housing. In this way, localized heating of the header housing also may be avoided.
    • 嵌入可植入医疗装置的头部中的滤波器电路衰减可能进入可植入医疗装置的能量。 在MRI频率下,滤波电路的阻抗远高于可植入医疗器械的穿通电容器的阻抗。 因此,否则将进入可植入医疗装置的MRI感应电流受到滤波器电路的限制。 因此,通过滤波器电路的操作可以显着地减少在MRI扫描期间可能发生的局部器件加热。 在一些实施方式中,头部嵌入式滤波器电路与插头外壳电隔离。 以这种方式,也可以避免集管壳体的局部加热。