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    IMPLANTABLE DEVICE WITH BIAS FOR MRI
    2.
    发明申请
    IMPLANTABLE DEVICE WITH BIAS FOR MRI 有权
    具有用于MRI的偏移的可植入装置

    公开(公告)号：US20140296699A1

    公开(公告)日：2014-10-02

    申请号：US14301002

    申请日：2014-06-10

    Applicant: Cardiac Pacemakers, Inc.

    Inventor： Nicholas J. Stessman ,  Michael J. Lyden ,  Thomas M. Bocek ,  William J. Linder ,  Joseph M. Bocek

    IPC: A61N1/08

    CPC classification number: A61N1/08 ,  A61N1/086 ,  A61N1/37 ,  A61N1/3718

    Abstract: An ambulatory or implantable device, such as a pacer, defibrillator, or other cardiac rhythm management device, can tolerate magnetic resonance imaging (MRI) or other noise without turning on an integrated circuit diode by selectively providing a bias voltage that can overcome an expected induced voltage resulting from the MRI or other noise.

    Abstract translation: 诸如起搏器，除颤器或其他心律管理装置的移动或可植入装置可以容忍磁共振成像（MRI）或其他噪声，而不通过选择性地提供可以克服预期诱导的偏置电压而导通集成电路二极管 由MRI或其他噪音引起的电压。

    SYSTEMS AND METHODS FOR SENSING EXTERNAL MAGNETIC FIELDS IN IMPLANTABLE MEDICAL DEVICES
    6.
    发明申请
    SYSTEMS AND METHODS FOR SENSING EXTERNAL MAGNETIC FIELDS IN IMPLANTABLE MEDICAL DEVICES 有权
    可移植医疗器械中感应外部磁场的系统和方法

    公开(公告)号：US20140194729A1

    公开(公告)日：2014-07-10

    申请号：US14204559

    申请日：2014-03-11

    Applicant: Cardiac Pacemakers, Inc.

    Inventor： Karl Gauglitz ,  Thomas M. Bocek ,  Mark Rutzer ,  Lorin W. Matthews ,  William E. Reagor ,  Blair Erbstoeszer

    IPC: G01R33/28 ,  A61N1/39 ,  A61N1/36 ,  A61B5/055

    CPC classification number: G01R33/287 ,  A61B5/055 ,  A61N1/3605 ,  A61N1/3718 ,  A61N1/3956 ,  G01V3/101

    Abstract: Systems and methods for sensing external magnetic fields in implantable medical devices are provided. One aspect of this disclosure relates to an apparatus for sensing magnetic fields. An apparatus embodiment includes a sensing circuit with at least one inductor having a magnetic core that saturates in the presence of a magnetic field having a prescribed flux density. The apparatus embodiment also includes an impedance measuring circuit connected to the sensing circuit. The impedance measuring circuit is adapted to measure impedance of the sensing circuit and to provide a signal when the impedance changes by a prescribed amount. According to an embodiment, the sensing circuit includes a resistor-inductor-capacitor (RLC) circuit. The impedance measuring circuit includes a transthoracic impedance measurement module (TIMM), according to an embodiment. Other aspects and embodiments are provided herein.

    Abstract translation: 提供了用于感测可植入医疗装置中的外部磁场的系统和方法。 本公开的一个方面涉及用于感测磁场的装置。 一种装置实施例包括具有至少一个具有磁芯的感应电路的感测电路，该磁芯在具有规定磁通密度的磁场的存在下饱和。 装置实施例还包括连接到感测电路的阻抗测量电路。 阻抗测量电路适于测量感测电路的阻抗，并且当阻抗改变规定量时提供信号。 根据实施例，感测电路包括电阻 - 电感 - 电容（RLC）电路。 根据实施例，阻抗测量电路包括经胸阻抗测量模块（TIMM）。 本文提供了其它方面和实施例。

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