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    Cardiac rhythm management system with defibrillation threshold prediction
    1.
    发明授权
    Cardiac rhythm management system with defibrillation threshold prediction 有权
    心脏节律管理系统除颤阈值预测

    公开(公告)号：US08036744B2

    公开(公告)日：2011-10-11

    申请号：US12631944

    申请日：2009-12-07

    申请人： Richard Milon Dujmovic, Jr. ,  Phil Foshee ,  Richard Fogoros ,  Joseph M. Smith ,  Douglas R. Daum ,  Weimin Sun

    发明人： Richard Milon Dujmovic, Jr. ,  Phil Foshee ,  Richard Fogoros ,  Joseph M. Smith ,  Douglas R. Daum ,  Weimin Sun

    IPC分类号： A61N1/08 ,  A61N1/39 ,  A61N1/365

    CPC分类号： A61N1/3937 ,  A61N1/3943

    摘要： A cardiac rhythm management device predicts defibrillation thresholds without any need to apply defibrillation shocks or subjecting the patient to fibrillation. Intravascular defibrillation electrodes are implanted in a heart. By applying a small test energy, an electric field near one of the defibrillation electrodes is determined by measuring a voltage at a sensing electrode offset from the defibrillation electrode by a known distance. A desired minimum value of electric field at the heart periphery is established. A distance between a defibrillation electrodes and the heart periphery is measured, either fluoroscopically or by measuring a voltage at an electrode at or near the heart periphery. Using the measured electric field and the measured distance to the periphery of the heart, the defibrillation energy needed to obtain the desired electric field at the heart periphery is estimated. In an example, the device also includes a defibrillation shock circuit and a stimulation circuit.

    摘要翻译： 心律管理装置预测除颤阈值，而不需要施加除颤电击或使患者起颤。 血管内除颤电极植入心脏。 通过施加小的测试能量，通过测量从除颤电极偏移已知距离的感测电极处的电压来确定除颤电极之一附近的电场。 建立心脏周围电场的期望最小值。 测量除颤电极和心脏周边之间的距离，通过荧光透视或通过测量心脏周围处或附近的电极处的电压。 使用测量的电场和到心脏外围的测量距离，估计在心脏周边获得所需电场所需的除颤能量。 在一个示例中，该装置还包括除颤电击电路和刺激电路。

    Cardiac rhythm management system with defibrillation threshold prediction
    2.
    发明授权
    Cardiac rhythm management system with defibrillation threshold prediction 有权
    心脏节律管理系统除颤阈值预测

    公开(公告)号：US07643877B2

    公开(公告)日：2010-01-05

    申请号：US11061315

    申请日：2005-02-18

    申请人： Richard Milon Dujmovic, Jr. ,  Phil Foshee ,  Richard Fogoros ,  Joseph M. Smith ,  Douglas R. Daum ,  Weimin Sun

    发明人： Richard Milon Dujmovic, Jr. ,  Phil Foshee ,  Richard Fogoros ,  Joseph M. Smith ,  Douglas R. Daum ,  Weimin Sun

    IPC分类号： A61N1/08 ,  A61N1/39 ,  A61N1/365

    CPC分类号： A61N1/3937 ,  A61N1/3943

    摘要： A cardiac rhythm management device predicts defibrillation thresholds without any need to apply defibrillation shocks or subjecting the patient to fibrillation. Intravascular defibrillation electrodes are implanted in a heart. By applying a small test energy, an electric field near one of the defibrillation electrodes is determined by measuring a voltage at a sensing electrode offset from the defibrillation electrode by a known distance. A desired minimum value of electric field at the heart periphery is established. A distance between a defibrillation electrodes and the heart periphery is measured, either fluoroscopically or by measuring a voltage at an electrode at or near the heart periphery. Using the measured electric field and the measured distance to the periphery of the heart, the defibrillation energy needed to obtain the desired electric field at the heart periphery is estimated. In an example, the device also includes a defibrillation shock circuit and a stimulation circuit.

    摘要翻译： 心律管理装置预测除颤阈值，而不需要施加除颤电击或使患者起颤。 血管内除颤电极植入心脏。 通过施加小的测试能量，通过测量从除颤电极偏移已知距离的感测电极处的电压来确定除颤电极之一附近的电场。 建立心脏周围电场的期望最小值。 测量除颤电极和心脏周边之间的距离，通过荧光透视或通过测量心脏周围处或附近的电极处的电压。 使用测量的电场和到心脏外围的测量距离，估计在心脏周边获得所需电场所需的除颤能量。 在一个示例中，该装置还包括除颤电击电路和刺激电路。

    CARDIAC RHYTHM MANAGEMENT SYSTEM WITH DEFIBRILLATION THRESHOLD PREDICTION
    3.
    发明申请
    CARDIAC RHYTHM MANAGEMENT SYSTEM WITH DEFIBRILLATION THRESHOLD PREDICTION 有权
    CARDIAC RHYTHM管理系统与定律阈值预测

    公开(公告)号：US20100087884A1

    公开(公告)日：2010-04-08

    申请号：US12631944

    申请日：2009-12-07

    申请人： Richard Milon Dujmovic, JR. ,  Phil Foshee ,  Richard Fogoros ,  Joseph M. Smith ,  Douglas R. Daum ,  Weimin Sun

    发明人： Richard Milon Dujmovic, JR. ,  Phil Foshee ,  Richard Fogoros ,  Joseph M. Smith ,  Douglas R. Daum ,  Weimin Sun

    IPC分类号： A61N1/39

    CPC分类号： A61N1/3937 ,  A61N1/3943

    摘要： A cardiac rhythm management device predicts defibrillation thresholds without any need to apply defibrillation shocks or subjecting the patient to fibrillation. Intravascular defibrillation electrodes are implanted in a heart. By applying a small test energy, an electric field near one of the defibrillation electrodes is determined by measuring a voltage at a sensing electrode offset from the defibrillation electrode by a known distance. A desired minimum value of electric field at the heart periphery is established. A distance between a defibrillation electrodes and the heart periphery is measured, either fluoroscopically or by measuring a voltage at an electrode at or near the heart periphery. Using the measured electric field and the measured distance to the periphery of the heart, the defibrillation energy needed to obtain the desired electric field at the heart periphery is estimated. In an example, the device also includes a defibrillation shock circuit and a stimulation circuit.

    摘要翻译： 心律管理装置预测除颤阈值，而不需要施加除颤电击或使患者起颤。 血管内除颤电极植入心脏。 通过施加小的测试能量，通过测量从除颤电极偏移已知距离的感测电极处的电压来确定除颤电极之一附近的电场。 建立心脏周围电场的期望最小值。 测量除颤电极和心脏周边之间的距离，通过荧光透视或通过测量心脏周围处或附近的电极处的电压。 使用测量的电场和到心脏外围的测量距离，估计在心脏周边获得所需电场所需的除颤能量。 在一个示例中，该装置还包括除颤电击电路和刺激电路。

    Cardiac rhythm management system with defibrillation threshold prediction
    4.
    发明申请
    Cardiac rhythm management system with defibrillation threshold prediction 有权
    心脏节律管理系统除颤阈值预测

    公开(公告)号：US20050251215A1

    公开(公告)日：2005-11-10

    申请号：US11061315

    申请日：2005-02-18

    申请人： Richard Dujmovic ,  Phil Foshee ,  Richard Fogoros ,  Joseph Smith ,  Douglas Daum ,  Weimin Sun

    发明人： Richard Dujmovic ,  Phil Foshee ,  Richard Fogoros ,  Joseph Smith ,  Douglas Daum ,  Weimin Sun

    IPC分类号： A61N1/39

    CPC分类号： A61N1/3937 ,  A61N1/3943

    摘要： A cardiac rhythm management device predicts defibrillation thresholds without any need to apply defibrillation shocks or subjecting the patient to fibrillation. Intravascular defibrillation electrodes are implanted in a heart. By applying a small test energy, an electric field near one of the defibrillation electrodes is determined by measuring a voltage at a sensing electrode offset from the defibrillation electrode by a known distance. A desired minimum value of electric field at the heart periphery is established. A distance between a defibrillation electrodes and the heart periphery is measured, either fluoroscopically or by measuring a voltage at an electrode at or near the heart periphery. Using the measured electric field and the measured distance to the periphery of the heart, the defibrillation energy needed to obtain the desired electric field at the heart periphery is estimated. In an example, the device also includes a defibrillation shock circuit and a stimulation circuit.

    摘要翻译： 心律管理装置预测除颤阈值，而不需要施加除颤电击或使患者起颤。 血管内除颤电极植入心脏。 通过施加小的测试能量，通过测量从除颤电极偏移已知距离的感测电极处的电压来确定除颤电极之一附近的电场。 建立心脏周围电场的期望最小值。 测量除颤电极和心脏周边之间的距离，通过荧光透视或通过测量心脏周围处或附近的电极处的电压。 使用测量的电场和到心脏外围的测量距离，估计在心脏周边获得所需电场所需的除颤能量。 在一个示例中，该装置还包括除颤电击电路和刺激电路。

    Cardiac rhythm management system with defibrillation threshold prediction
    5.
    发明授权
    Cardiac rhythm management system with defibrillation threshold prediction 有权

    公开(公告)号：US06751502B2

    公开(公告)日：2004-06-15

    申请号：US09808419

    申请日：2001-03-14

    申请人： Douglas R. Daum ,  Weimin Sun

    发明人： Douglas R. Daum ,  Weimin Sun

    IPC分类号： A61N139

    CPC分类号： A61N1/3937 ,  A61N1/3943

    摘要： A cardiac rhythm management device predicts defibrillation thresholds without any need to apply defibrillation shocks or subjecting the patient to fibrillation. Intravascular defibrillation electrodes are implanted in a heart. By applying a small test energy, an electric field near one of the defibrillation electrodes is determined by measuring a voltage at a sensing electrode offset from the defibrillation electrode by a known distance. A desired predetermined minimum value of electric field at the periphery of the heart is established. A distance between one of the defibrillation electrodes and the heart periphery is measured, either fluoroscopically or by measuring a voltage at an electrode located at or near the heart periphery. Using the measured electric field and the measured distance to the periphery of the heart, the defibrillation energy needed to obtain the desired electric field at the heart periphery is estimated. This estimation is based on an elliptical model of the electric field distribution around the dipole foci formed by the defibrillation electrodes, or other suitable electric field model.

    Cardiac rhythm management system with defibrillation threshold prediction
    6.
    发明授权
    Cardiac rhythm management system with defibrillation threshold prediction 有权
    心脏节律管理系统除颤阈值预测

    公开(公告)号：US06859664B2

    公开(公告)日：2005-02-22

    申请号：US10744991

    申请日：2003-12-23

    申请人： Douglas R. Daum ,  Weimin Sun

    发明人： Douglas R. Daum ,  Weimin Sun

    IPC分类号： A61N1/39

    CPC分类号： A61N1/3937 ,  A61N1/3943

    摘要： A cardiac rhythm management device predicts defibrillation thresholds without any need to apply defibrillation shocks or subjecting the patient to fibrillation. Intravascular defibrillation electrodes are implanted in a heart. By applying a small test energy, an electric field near one of the defibrillation electrodes is determined by measuring a voltage at a sensing electrode offset from the defibrillation electrode by a known distance. A desired predetermined minimum value of electric field at the periphery of the heart is established. A distance between one of the defibrillation electrodes and the heart periphery is measured, either fluoroscopically or by measuring a voltage at an electrode located at or near the heart periphery. Using the measured electric field and the measured distance to the periphery of the heart, the defibrillation energy needed to obtain the desired electric field at the heart periphery is estimated. This estimation is based on an elliptical model of the electric field distribution around the dipole foci formed by the defibrillation electrodes, or other suitable electric field model.

    摘要翻译： 心律管理装置预测除颤阈值，而不需要施加除颤电击或使患者起颤。 血管内除颤电极植入心脏。 通过施加小的测试能量，通过测量从除颤电极偏移已知距离的感测电极处的电压来确定除颤电极之一附近的电场。 建立心脏周围电场的期望的预定最小值。 测量除颤电极中的一个与心脏外围之间的距离，通过荧光检查或通过测量位于心脏周边或附近的电极处的电压。 使用测量的电场和到心脏外围的测量距离，估计在心脏周边获得所需电场所需的除颤能量。 该估计基于由除颤电极形成的偶极灶周围的电场分布的椭圆模型或其它合适的电场模型。

    Maintaining linear beamforming weights in communications systems
    7.
    发明授权
    Maintaining linear beamforming weights in communications systems 有权
    在通信系统中维持线性波束成形权重

    公开(公告)号：US08755475B1

    公开(公告)日：2014-06-17

    申请号：US13411507

    申请日：2012-03-02

    申请人： Matthew C. Bromberg ,  Dale A. Branlund ,  Weimin Sun

    发明人： Matthew C. Bromberg ,  Dale A. Branlund ,  Weimin Sun

    IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

    CPC分类号： H04B7/0851 ,  H04B7/0617 ,  H04B17/345 ,  H04L1/0071 ,  H04L25/0234 ,  H04L25/03 ,  H04L25/03949

    摘要： Methods and systems that enhance interference cancellation in communication channels are described. Samples are obtained from stacked carriers in a received signal and a data vector is created from the samples. Stacked carriers are selected using a steering vector received during synchronization of the receiver. The steering vector is calculated to obtain cancellation of interference from another receiver and is calculated based on time domain channel estimation. Specialized time domain training sequences and simple cross correlation are used to obtain a channel estimate for use in stacked carrier beamforming and/or for use in OFDM based spatial beamforming. State space or filter-based modeled interpolators or whitening matrix-filters in the frequency or time domain are used for interpolation of the channels to maintain linear beamforming weights as a function of time or frequency. Space time adaptive processing facilitates beamforming of communications signals for OFDM and 802.16 (WiMax) systems.

    摘要翻译： 描述了在通信信道中增强干扰消除的方法和系统。 在接收信号中从堆叠载波获取样本，并从样本创建数据向量。 使用在接收机同步期间接收到的导向矢量来选择堆叠的载波。 计算导向矢量以获得来自另一接收机的干扰的抵消，并且基于时域信道估计来计算。 使用专用时域训练序列和简单的互相关来获得用于堆叠载波波束成形和/或用于基于OFDM的空间波束形成中的信道估计。 在频率或时域中的状态空间或基于滤波器的建模的内插器或白化矩阵滤波器被用于信道的插值，以维持作为时间或频率的函数的线性波束成形权重。 空时自适应处理有利于OFDM和802.16（WiMax）系统的通信信号的波束成形。

    Self-calibrating rate-adaptive pacemaker
    8.
    发明授权
    Self-calibrating rate-adaptive pacemaker 失效

    公开(公告)号：US08494632B2

    公开(公告)日：2013-07-23

    申请号：US13230563

    申请日：2011-09-12

    申请人： Weimin Sun ,  Bruce R. Jones ,  Douglas J. Lang ,  Donald L. Hopper

    发明人： Weimin Sun ,  Bruce R. Jones ,  Douglas J. Lang ,  Donald L. Hopper

    IPC分类号： A61N1/18

    CPC分类号： A61N1/365 ,  A61N1/36585

    摘要： A system and method for automatically adjusting the operating parameters of a rate-adaptive cardiac pacemaker. In accordance with the method, maximum exertion levels attained by the patient are measured at periodic intervals and stored. The stored maximum exertion levels may then be used to update a long-term maximal exertion level, and the slope of the rate-response curve is adjusted to map the updated long-term maximal exertion level to a maximum allowable pacing rate. The stored maximum exertion levels may also be used to update a sensor target rate which is used to adjust the slope of the rate response curve.