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    • 3. 发明公开
    • Switch for turning off therapy delivery of an active implantable medical device during MRI scans
    • 切换到关闭期间MRI检查医疗植入物的治疗传递
    • EP2198914A1
    • 2010-06-23
    • EP09014027.8
    • 2009-11-10
    • Greatbatch Ltd.
    • Stevenson, Robert A.
    • A61N1/36A61N1/05A61N1/08
    • A61N1/3718A61N1/086
    • An MRI-compatible electronic medical therapy system is provided for temporarily preventing current flow through an implanted lead wire in the presence of an induced radio frequency, magnetic, or static field. One or more normally closed switches are disposed in series between the AIMD and the one or more distal electrodes. The switch may be incorporated in the AIMD, lead wire, or within or adjacent to the electrode. The switch remains closed during normal AIMD-related therapy, but temporarily opens in the presence of an induced radio frequency, magnetic, or static field so as to prevent current flow through the electrode and lead wire. The switches prevent current from circulating that could be induced by a medical therapeutic diagnostic device, which can cause overheating of lead wires, excessive currents or temperatures and tissue damage.
    • MRI兼容的电子医疗治疗系统提供了一种用于通过在感应射频,磁或静电场的存在暂时防止电流流到植入引线。 一个或多个常闭开关设置在AIMD和所述一个或多个远侧电极之间串联。 该开关可以在AIMD,引线被结合,或内或邻近的电极。 开关保持正常AIMD相关治疗期间关闭,但在感应射频,磁或静电场的存在暂时打开,以防止通过电极和导线的电流流动。 开关防止循环,可以由医疗治疗诊断装置,这可能会导致导线,过电流或温度和组织损伤的过热来感应电流。