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    • 33. 发明申请
    • Catheter Tip Positioning Method
    • 导管尖端定位方法
    • US20100317981A1
    • 2010-12-16
    • US12815331
    • 2010-06-14
    • Sorin Grunwald
    • Sorin Grunwald
    • A61B5/0456
    • A61B5/06A61B5/04017A61B5/042A61B5/0452A61B5/065A61B5/726A61B34/20A61M25/0014A61M2039/1077A61M2039/1083A61M2039/1088
    • A computer-based method for positioning an endovascular device in or near the heart using electrocardiogram (ECG) signals is provided. The computer-based method includes receiving an endovascular ECG signal, associated with an endovascular device, including a plurality of waveforms, each waveform having at least a P-wave component, processing the endovascular ECG signal, over a plurality of predetermined time periods, to calculate a P-wave amplitude and a spectral power for each predetermined time period, determining a maximum P-wave amplitude from the plurality of P-wave amplitudes, and an associated maximum spectral power from the plurality of spectral powers, associating the maximum P-wave amplitude and the maximum spectral power with a predetermined location in or near the heart, calculating a location of the endovascular device, for each predetermined time period, based on a ratio of the P-wave amplitude to the maximum P-wave amplitude and a ratio of the spectral power to the maximum spectral power, and displaying the location of the endovascular device to a user.
    • 提供了一种基于计算机的方法,用于使用心电图(ECG)信号将血管内装置定位在心脏内或心脏附近。 基于计算机的方法包括:接收与血管内装置相关联的血管内ECG信号,包括多个波形,每个波形具有至少一个P波分量,在多个预定时间段内处理血管内ECG信号,至 计算每个预定时间段的P波幅度和频谱功率,从多个P波幅度确定最大P波振幅,以及从多个频谱功率确定相关联的最大频谱功率,将最大P- 基于P波幅度与最大P波幅度的比率,在每个预定时间段内计算血管内装置的位置,计算出心脏内或心脏附近的预定位置的波幅度和最大频谱功率 光谱功率与最大光谱功率的比率,以及将血管内装置的位置显示给使用者。