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    • 23. 发明申请
    • SYSTEMS AND METHODS FOR USE WITH SUBCUTANEOUS IMPLANTABLE MEDICAL DEVICES FOR DETECTING ELECTRODE/TISSUE CONTACT PROBLEMS
    • 用于检测电极/组织接触问题的可插入医疗器械的系统和方法
    • US20110213261A1
    • 2011-09-01
    • US12714231
    • 2010-02-26
    • Mihir NawareCecilia Qin Xi
    • Mihir NawareCecilia Qin Xi
    • A61B5/0452
    • A61B5/6886
    • Techniques are provided for detecting problems involving electrode/tissue contact with extracardiac electrodes of subcutaneous monitoring devices, such as atrial fibrillation (AF) monitors. Briefly, subcutaneous impedance signals are detected using extracardiac sensing electrodes of the subcutaneous device. Problems involving poor electrode/tissue contact are then detected within the subcutaneous impedance signals. Depending upon its programming, the device can then inhibit the recording of subcutaneous electrocardiogram (ECG) data during periods of poor contact. Additionally, the device can identify the particular contact problem based on the impedance signals. In one example, the device identifies one or more of: acute instability of impedance indicative of intermittent electrode/tissue contact; impedance signal saturation indicative of loss of electrode/tissue contact; and impedance signal dropout indicative of the presence of liquids surrounding the electrodes (such as blood or edema accumulation.) Techniques for programming various modes of operation of the subcutaneous device are also provided.
    • 提供技术用于检测涉及与皮下监测装置(例如心房颤动(AF))监测器的心脏电极接触的电极/组织的问题。 简而言之,使用皮下装置的心外感测电极检测皮下阻抗信号。 然后在皮下阻抗信号中检测到涉及电极/组织接触不良的问题。 根据其编程,器件可以在不良接触期间抑制皮下心电图(ECG)数据的记录。 另外,设备可以基于阻抗信号来识别特定的接触问题。 在一个示例中,该装置识别以下中的一个或多个:表示间歇性电极/组织接触的阻抗的急性不稳定性; 指示电极/组织接触丧失的阻抗信号饱和度; 以及指示电极周围的液体的存在的阻抗信号丢失(例如血液或水肿积聚)。还提供了用于编程皮下装置的各种操作模式的技术。