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139 条记录 (耗时 0.026 秒)

    Methods and apparatus for filtering EGM signals detected by an implantable medical device
    61.
    发明授权
    Methods and apparatus for filtering EGM signals detected by an implantable medical device 有权

    公开(公告)号：US07120484B2

    公开(公告)日：2006-10-10

    申请号：US10045722

    申请日：2002-01-14

    申请人： Steven N. Lu ,  Robert W. Stadler

    发明人： Steven N. Lu ,  Robert W. Stadler

    IPC分类号： A61B5/04

    CPC分类号： A61B5/0008 ,  A61B5/0428 ,  A61B5/7232 ,  A61N1/3704

    摘要： An analog physiologic signal, e.g., the cardiac EGM, sensed by an IMD is filtered with a high pass filter (HPF), the cut-off frequency of the HPF being within a predetermined frequency bandwidth, wherein a low-band portion of the predetermined frequency bandwidth is attenuated in the filtered physiologic signal. The filtered physiologic signal is digitized in real time order, and the digital data set is filtered in reverse time order employing a digital IIR filter having characteristics substantially matching the cut-off frequency and filter characteristics of the HPF. When the system is implemented within an IMD, the filtered digital data set is compressed by lossy compression algorithm, and the compressed data set is filtered in reverse time order. In certain embodiments, the filtered digital data set is uplink telemetry transmitted to an external medical device, and the uplink telemetered data set is filtered in reverse time order employing a digital backward IIR filter resident in the external medical device.

    Method and apparatus for increasing the low frequency dynamic range of a system for measuring physiological signals with an implantable medical device
    62.
    发明授权
    Method and apparatus for increasing the low frequency dynamic range of a system for measuring physiological signals with an implantable medical device 失效
    用于通过可植入医疗装置增加用于测量生理信号的系统的低频动态范围的方法和装置

    公开(公告)号：US06317625B1

    公开(公告)日：2001-11-13

    申请号：US09713455

    申请日：2000-11-15

    申请人： Dana J. Olson ,  David W. Van Ess ,  Robert W. Stadler ,  Steven N. Lu ,  Jeffrey D. Wilkinson ,  Tara N. Ptak

    发明人： Dana J. Olson ,  David W. Van Ess ,  Robert W. Stadler ,  Steven N. Lu ,  Jeffrey D. Wilkinson ,  Tara N. Ptak

    IPC分类号： A61B50402

    CPC分类号： A61B5/0428 ,  A61B5/7232 ,  A61N1/3925 ,  Y10S128/901 ,  Y10S128/902

    摘要： A signal measuring system for use with an Implantable Medical Device (IMD) is provided for measuring physiologic signals having a relatively large effective dynamic range. In one embodiment, the system includes a High-Pass Filter (HPF), an Analog-to-Digital Converter (ADC), a Decimation Filter (DF), and a Compensation Filter (CF). The HPF receives an input signal that includes both the baseline wander imposed on a physiological signal. According to one aspect of the invention, the HPF attenuates low frequency components of the input signal, including a portion of the frequency band within the desired output signal bandwidth. The ADC then oversamples the output signal of the HPF. The DF receives the output samples from the ADC and generates output samples at rate that is at least twice the maximum frequency of the desired output signal. The CF then amplifies the low frequency end of the DF output samples. The gain and cutoff frequency of the CF are selected to offset the HPF attenuation of those low frequency components of the input signal below the cutoff frequency of the HPF and above the minimum frequency of the desired output signal. In one embodiment, the DF and CF are implemented by a processing circuit executing programmed instructions. The processing circuit may be included within the IMD, or may be partially or fully implemented within a device that is external to the IMD.

    摘要翻译： 提供了一种用于可植入医疗器械（IMD）的信号测量系统，用于测量具有相对较大有效动态范围的生理信号。 在一个实施例中，该系统包括高通滤波器（HPF），模数转换器（ADC），抽取滤波器（DF）和补偿滤波器（CF）。 HPF接收包括施加在生理信号上的基线漂移的输入信号。 根据本发明的一个方面，HPF衰减输入信号的低频分量，包括期望输出信号带宽内的一部分频带。 ADC然后对HPF的输出信号进行过采样。 DF从ADC接收输出采样，并以至少是所需输出信号的最大频率的两倍的速率生成输出采样。 CF然后放大DF输出样本的低频端。 选择CF的增益和截止频率以将输入信号的那些低频分量的HPF衰减降低到低于HPF的截止频率并且高于所需输出信号的最小频率。 在一个实施例中，DF和CF由执行编程指令的处理电路实现。 处理电路可以包括在IMD内，或者可以部分地或完全地实现在IMD外部的设备中。

    Impedance variability analysis to identify lead-related conditions
    65.
    发明授权
    Impedance variability analysis to identify lead-related conditions 有权
    阻抗变异性分析来识别铅相关条件

    公开(公告)号：US08644931B2

    公开(公告)日：2014-02-04

    申请号：US12180304

    申请日：2008-07-25

    申请人： Robert W. Stadler ,  Bruce D. Gunderson ,  Amisha S. Patel

    发明人： Robert W. Stadler ,  Bruce D. Gunderson ,  Amisha S. Patel

    IPC分类号： A61N1/00

    CPC分类号： A61N1/36521 ,  A61N1/3706 ,  A61N2001/083

    摘要： In general, the disclosure relates to techniques for calculating mean impedance values and impedance variability values to detect a possible condition with a lead or device-lead pathway or connection. In one example, a device may be configured to determine an impedance value for an electrical path based on a plurality of measured impedance values for the electrical path, wherein the electrical path comprises a plurality of electrodes, and to determine an impedance variability value based on at least one of the plurality of measured impedance values. The device may be further configured to determine a threshold value based on the determined impedance value and the impedance variability value, compare a newly measured impedance value for the electrical path to the threshold value, and indicate a possible condition of the electrical path based on the comparison.

    摘要翻译： 通常，本公开涉及用于计算平均阻抗值和阻抗变异性值以用于检测具有引线或器件引导路径或连接的可能状况的技术。 在一个示例中，设备可以被配置为基于用于电路径的多个测量的阻抗值来确定电路径的阻抗值，其中电路径包括多个电极，并且基于以下方式确定阻抗变异性值： 所述多个测量的阻抗值中的至少一个。 该装置还可以被配置为基于所确定的阻抗值和阻抗变异性值来确定阈值，将新测量的电通路的阻抗值与阈值进行比较，并且基于该路径指示电路径的可能状态 比较。

    Method and apparatus for detecting and discriminating tachycardia
    66.
    发明授权
    Method and apparatus for detecting and discriminating tachycardia 有权
    用于检测和辨别心动过速的方法和装置

    公开(公告)号：US08543198B2

    公开(公告)日：2013-09-24

    申请号：US12768807

    申请日：2010-04-28

    申请人： Xusheng Zhang ,  Robert W. Stadler ,  Jeffrey M. Gillberg

    发明人： Xusheng Zhang ,  Robert W. Stadler ,  Jeffrey M. Gillberg

    IPC分类号： A61B5/04

    CPC分类号： A61B5/0464 ,  A61B5/0245 ,  A61B5/7203 ,  A61N1/3622 ,  A61N1/3962

    摘要： A medical device and associated method for discriminating cardiac events includes determining whether a first match score is within a first match zone having a first correlation with a non-treatable cardiac event, a second match zone having a second correlation with the non-treatable cardiac event less than the first correlation with the non-treatable event, a third match zone having a first correlation with a treatable cardiac event, and a fourth match zone having a second correlation with the treatable cardiac event greater than the first correlation with the treatable cardiac event. A determination is made as to whether a second match score and a third match score are within the first match zone, the second match zone, the third match zone and the fourth match zone to generate a first adjusting factor, and cardiac event evidence is accumulated in response to the first adjusting factor for discriminating cardiac events.

    摘要翻译： 用于鉴别心脏事件的医疗装置和相关联的方法包括确定第一匹配得分是否在与不可治疗心脏事件具有第一相关性的第一匹配区域内，与不可治疗心脏事件具有第二相关性的第二匹配区域 小于与不可治疗事件的第一相关性，具有与可治疗心脏事件的第一相关性的第三匹配区，以及与可治疗心脏事件具有大于与可治疗心脏事件的第一相关性的第二相关性的第四匹配区 。 确定第二匹配分数和第三匹配分数是否在第一匹配区域，第二匹配区域，第三匹配区域和第四匹配区域内，以产生第一调整因子，并且累积心脏事件证据 响应于用于区分心脏事件的第一调整因子。

    DETECTION OF EXTRACARDIAC STIMULATION BY A CARDIAC RHYTHM MANAGEMENT DEVICE
    68.
    发明申请
    DETECTION OF EXTRACARDIAC STIMULATION BY A CARDIAC RHYTHM MANAGEMENT DEVICE 有权
    通过CARDIAC RHYTHM管理设备检测提取物刺激

    公开(公告)号：US20130060298A1

    公开(公告)日：2013-03-07

    申请号：US13600282

    申请日：2012-08-31

    申请人： Vincent E. Splett ,  Robert W. Stadler ,  Nathan A. Grenz

    发明人： Vincent E. Splett ,  Robert W. Stadler ,  Nathan A. Grenz

    IPC分类号： A61N1/37

    CPC分类号： A61N1/36585 ,  A61N1/3611 ,  A61N1/371

    摘要： A medical device system and associated method for controlling a cardiac rhythm management therapy detect extracardiac stimulation. Cardiac pacing pulses are delivered, and a cardiac electrical signal comprising myocardial depolarization and repolarization signals is acquired. A processor is configured to, responsive to the cardiac electrical signal, detect extracardiac capture due to the cardiac pacing pulse.

    摘要翻译： 用于控制心律管理疗法的医疗装置系统和相关方法检测心外刺激。 发送心脏起搏脉冲，并且获取包括心肌去极化和复极信号的心电信号。 处理器被配置为响应于心脏电信号，检测由于心脏起搏脉冲引起的心外捕获。

    Method and apparatus for detecting and discriminating tachycardia
    69.
    发明授权
    Method and apparatus for detecting and discriminating tachycardia 有权
    用于检测和辨别心动过速的方法和装置

    公开(公告)号：US08271073B2

    公开(公告)日：2012-09-18

    申请号：US12768835

    申请日：2010-04-28

    申请人： Xusheng Zhang ,  Robert W. Stadler ,  Jeffrey M. Gillberg

    发明人： Xusheng Zhang ,  Robert W. Stadler ,  Jeffrey M. Gillberg

    IPC分类号： A61B5/0464

    CPC分类号： A61B5/0464 ,  A61B5/04525 ,  A61B5/686 ,  A61B5/6869 ,  A61B5/7203 ,  A61N1/3621 ,  A61N1/3624 ,  A61N1/3962

    摘要： A medical device and associated method for discriminating cardiac events includes determining whether a first match score is within a first match zone having a first correlation with a non-treatable cardiac event, a second match zone having a second correlation with the non-treatable cardiac event less than the first correlation, a third match zone having a first correlation with a treatable cardiac event, and a fourth match zone having a second correlation with the treatable cardiac event greater than the first correlation with the treatable cardiac event. In response to the first match score being within one of the first and second match zones, a determination is made whether consecutive match scores are within the first match zone and whether a break in the treatable cardiac event has occurred. Cardiac evidence is accumulated in response to determining whether a break has occurred and utilized to discriminate cardiac events.

    摘要翻译： 用于鉴别心脏事件的医疗装置和相关联的方法包括确定第一匹配得分是否在与不可治疗心脏事件具有第一相关性的第一匹配区域内，与不可治疗心脏事件具有第二相关性的第二匹配区域 小于第一相关性，具有与可治疗心脏事件的第一相关性的第三匹配区，以及与可治疗心脏事件具有大于与可治疗心脏事件的第一相关性的第二相关性的第四匹配区。 响应于第一匹配分数在第一和第二匹配区域之一内，确定连续匹配分数是否在第一匹配区域内，以及是否发生了可治疗心脏事件中断。 响应于确定是否发生休息并利用心脏事件来积累心脏证据。

    Sequential discrimination approach for detecting treatable cardiac rhythms
    70.
    发明授权
    Sequential discrimination approach for detecting treatable cardiac rhythms 有权
    用于检测可治疗心律的顺序鉴别方法

    公开(公告)号：US08170654B1

    公开(公告)日：2012-05-01

    申请号：US12903325

    申请日：2010-10-13

    申请人： Xusheng Zhang ,  Robert W. Stadler ,  Jeffrey M. Gillberg

    发明人： Xusheng Zhang ,  Robert W. Stadler ,  Jeffrey M. Gillberg

    IPC分类号： A61B5/046 ,  A61B5/0464

    CPC分类号： A61B5/7267 ,  A61B5/0422 ,  A61B5/046 ,  A61B5/0464 ,  A61B5/686 ,  A61B5/7239 ,  A61N1/3624 ,  A61N1/3962

    摘要： A system and method for use in a medical device for discriminating cardiac events establishes population-based thresholds corresponding to cardiac signal morphology metrics for discriminating between a first cardiac event and a second cardiac event. A population-based threshold criterion for discriminating cardiac events is established. The population-based threshold criterion is applied to a cardiac signal segment and the segment is classified if the criterion is satisfied. A patient-specific threshold is established in response to the sensed cardiac signal segment not being classified after applying the population-based threshold criterion. The sensed signal segment is classified in response to the patient-specific threshold comparison.

    摘要翻译： 用于辨别心脏事件的医疗装置中的系统和方法建立了对应于心脏信号形态度量的基于群体的阈值，用于区分第一心脏事件和第二心脏事件。 建立了基于人群的阈值判别标准，用于辨别心脏事件。 基于人群的阈值标准被应用于心脏信号段，并且如果满足标准，则对该段进行分类。 响应于在应用基于群体的阈值标准之后未被分类的感测到的心脏信号段建立患者特异性阈值。 感测的信号段根据患者特异性阈值比较进行分类。