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    • 1. 发明申请
    • LEAD INCLUDING CONDUCTORS CONFIGURED FOR REDUCED MRI-INDUCED CURRENTS
    • 引导包括用于减少MRI诱导电流配置的导体
    • WO2011103444A1
    • 2011-08-25
    • PCT/US2011/025457
    • 2011-02-18
    • CARDIAC PACEMAKERS, INC.LI, YingboAMERI, MasoudREDDY, G. ShantanuFOSTER, Arthur J.BENTSEN, James G.
    • LI, YingboAMERI, MasoudREDDY, G. ShantanuFOSTER, Arthur J.BENTSEN, James G.
    • A61N1/08
    • A61N1/05A61N1/0563A61N1/086
    • Systems and methods for improving response of implantable leads to magnetic fields during medical procedures such as magnetic resonance imaging (MRI) are described. In various embodiments, the lead includes an inner conductor that is helically shaped and radially surrounded, at least in part, by one or more high-voltage conductors. The high-voltage conductor can be mechanically and/or electrically coupled, via a coupler, to the shocking coil. The pitch of the inner and/or outer conductor can be varied (e.g., continuously or at certain points) along the length of the lead. In some embodiments, the filar thickness, the pitch, and the mean coil diameter of the inner coil, the high voltage conductor coil, and the shock coil can be configured such that these coils have a desired inductance value when subjected to externally applied electromagnetic energy at radio frequencies commonly generated by MRI scanners (e.g., 40 MHz to 300MHz).
    • 描述了在诸如磁共振成像(MRI)的医疗过程期间改善可植入引线对磁场的响应的系统和方法。 在各种实施例中,引线包括内部导体,该内部导体至少部分由螺旋形状并且被一个或多个高压导体径向包围。 高压导体可以通过耦合器机械地和/或电耦合到震动线圈。 内导体和/或外导体的间距可以沿引线的长度变化(例如,连续地或在某些点处)。 在一些实施例中,内部线圈,高压导体线圈和冲击线圈的丝状体厚度,间距和平均线圈直径可以被配置为使得当经受外部施加的电磁能量时,这些线圈具有期望的电感值 在MRI扫描仪通常产生的射频(例如,40 MHz至300MHz)。
    • 2. 发明申请
    • MRI SAFE, MULTIPOLAR ACTIVE FIXATION STIMULATION LEAD WITH CO-RADIAL CONSTRUCTION
    • MRI安全,多用途有源固定刺激引线与径向结构
    • WO2011081700A1
    • 2011-07-07
    • PCT/US2010/053179
    • 2010-10-19
    • CARDIAC PACEMAKERS, INC.FOSTER, Arthur J.BENTSEN, James G.
    • FOSTER, Arthur J.BENTSEN, James G.
    • A61N1/05A61N1/375A61N1/37
    • A61N1/056A61N1/086
    • Various embodiments relating to MRI safe, multi-polar active fixation stimulation leads with co-radial construction are disclosed. Some embodiments, allow the use of the generally smaller diameter co-radially constructed body (coated wires) to construct an active fixation lead, with an extendable/retractable fixation mechanism. Some embodiments use a connector assembly with an inner terminal ring, a terminal pin partially rotatably positioned within the annular inner terminal ring, and one or more resilient C-clips disposed within circumferential recesses. The resilient C-clips mechanically and electrically couple the inner terminal ring and the terminal ring while substantially limiting relative longitudinal translation of the terminal pin. In some embodiments, the connector assembly can be connected to an electrically inactive torque tube disposed longitudinally within the flexible body of the lead such that rotation of the terminal pin relative to the lead body causes rotation and longitudinal translation of a fixation helix relative to the body.
    • 公开了涉及具有同向径向结构的MRI安全,多极活动固定刺激引线的各种实施例。 一些实施例允许使用通常较小直径的共同径向构造的主体(涂覆线)来构造具有可伸缩/固定机构的主动固定引线。 一些实施例使用具有内部端子环的连接器组件,部分地可旋转地定位在环形内部端子环内的端子销以及设置在周向凹部内的一个或多个弹性C形夹。 弹性C形夹将机械和电耦合内端子环和端子环,同时基本上限制端子销的相对纵向平移。 在一些实施例中,连接器组件可以连接到纵向设置在引线的柔性体内的电惰性转矩管,使得端子销相对于引线体的旋转导致固定螺旋相对于主体的旋转和纵向平移 。