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2. 发明授权

US5601089A Method and apparatus for boosting the amplitude of ECG signals within a predetermined frequency range 失效
标题翻译：用于在预定频率范围内升高ECG信号的振幅的方法和装置
公开(公告)号：US5601089A
公开(公告)日：1997-02-11
申请号：US379046
申请日：1995-01-26
申请人： J. Daren Bledsoe , David L. Burton , Brian D. Setterberg , Alan V. Andresen
发明人： J. Daren Bledsoe , David L. Burton , Brian D. Setterberg , Alan V. Andresen
IPC分类号： A61B5/0436 , A61B5/0452 , G06F17/00
CPC分类号： A61B5/0452 , A61B5/0436 , A61B5/7203 , A61B5/7225 , A61B5/7239 , A61B5/7257
摘要： An ECG recorder and playback unit which includes software-implemented digital signal processing filters which compensate for phase and magnitude distortion occurring when an ECG signal is recorded on a Holter recorder and played back. This permits "tuning" a recorder and playback unit which may be unrelated, as when made by different manufacturers. An impulse or step signal is recorded and played back to provide a system frequency response measurement. Coefficients for a digital correction filter are derived from the discrete Fourier transform of the impulse or step response and a desired system response. When recorded ECG data is played back, it is filtered on a substantially real-time basis with the digital correction filter to compensate for phase and magnitude distortion. Prior to recording, the high frequencies of the ECG signal are boosted to compensate for high frequency losses inherent in the recording and playing back of ECG signals. A calibration pulse and a system characterization pulse are derived by statistically selecting from a plurality of pulses and averaging the selected pulses in order to minimize the effects of noise and tape defects in the pulses. High frequency components of the ECG signal can be amplified prior to recording the signal. This results in decreased amplification, and therefore noise, when the recorded signals are played back. Cardiac pacer pulse detection is performed prior to the step of filtering the played back signal to optimize pulse detection.
摘要翻译：一种ECG记录器和回放单元，其包括软件实现的数字信号处理滤波器，其补偿当ECG信号记录在Holter记录器上并重放时发生的相位和幅度失真。这允许“调谐”与不同制造商制造的记录器和播放单元可能是无关的。记录和重放脉冲或步进信号以提供系统频率响应测量。用于数字校正滤波器的系数从脉冲或阶跃响应的离散傅里叶变换和期望的系统响应导出。当记录的ECG数据被重放时，用数字校正滤波器基本上实时地对其进行滤波以补偿相位和幅度失真。在记录之前，提高ECG信号的高频以补偿ECG信号的记录和回放中固有的高频损耗。通过从多个脉冲统计学选择并平均所选择的脉冲来导出校准脉冲和系统表征脉冲，以便最小化脉冲中噪声和磁带缺陷的影响。在记录信号之前，可以对ECG信号的高频分量进行放大。当记录的信号被播放时，这导致放大减小，因此导致噪声。在滤波回放信号的步骤之前执行心脏起搏器脉冲检测以优化脉冲检测。

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