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    Cardiac rhythm management system with painless defibrillation lead impedance measurement
    1.
    发明申请
    Cardiac rhythm management system with painless defibrillation lead impedance measurement 有权
    心脏节律管理系统具有无痛除颤引线阻抗测量

    公开(公告)号：US20010007056A1

    公开(公告)日：2001-07-05

    申请号：US09776306

    申请日：2001-02-02

    申请人： Cardiac Pacemakers, Inc.

    发明人： William J. Linder ,  Keith R. Maile

    IPC分类号： A61B005/05

    CPC分类号： A61N1/3925

    摘要： A cardiac rhythm management system includes a defibrillation lead impedance measurement system by which defibrillation lead impedance is measured using a test current source different from the defibrillation output supply. A resulting voltage is measured to determine the defibrillation lead impedance. Using low amplitude test currents (e.g., 10-20 milliamperes) avoids patient discomfort. Charge-balanced test currents avoids charge build-up that may interfere with sensing and avoids electrode degeneration. Different current amplitudes and resulting measured voltages provide a differential defibrillation lead impedance measurement for canceling undesired effects. Bidirectional test currents account for polarity effects on the defibrillation lead impedance measurement. A calibration/correction technique uses measurements of known resistances to correct a measurement of an unknown defibrillation lead impedance measurement.

    摘要翻译： 心律管理系统包括除颤引线阻抗测量系统，通过该除颤引线阻抗测量系统使用不同于除颤输出电源的测试电流源来测量除颤引线阻抗。 测量得到的电压以确定除颤引线阻抗。 使用低振幅测试电流（例如10-20毫安）避免患者不适。 电荷平衡测试电流避免电荷积聚，可能会干扰感测并避免电极退化。 不同的电流幅度和所得到的测量电压提供差分除颤引线阻抗测量，以消除不良影响。 双向测试电流对除颤引线阻抗测量的极性影响。 校准/校正技术使用已知电阻的测量来校正未知除颤导线阻抗测量的测量。

    Cardiac rhythm management system with differential sensing channel
    2.
    发明申请
    Cardiac rhythm management system with differential sensing channel 有权
    具有差分感应通道的心律管理系统

    公开(公告)号：US20010003159A1

    公开(公告)日：2001-06-07

    申请号：US09764557

    申请日：2001-01-17

    申请人： Cardiac Pacemakers, Inc.

    发明人： Michael W. Dooley ,  Ron Balczewski ,  William J. Linder

    IPC分类号： A61N001/362

    CPC分类号： H03M1/0682 ,  A61N1/3704 ,  H03M1/46

    摘要： A differential discrete-time signal processing channel differentially processes cardiac signals in an implantable cardiac rhythm management device. Such signal processing effectively uses downsampling to uses lower bias currents, thereby saving power and prolonging the life of the implanted device, and also reduces clock feedthrough, provides a wider dynamic range and better rejection of power supply noise. The device includes a continuous-time buffer, a decimator/averager and/or other filter and/or amplifier circuits, and an analog-to-digital converter, each configured for processing differential signals. The device also includes an operational transconductance amplifier (OTA), for the discrete-time differential signal processing. The OTA provides, among other things, an output common mode adjustment circuit and an offset compensation circuit.

    摘要翻译： 差分离散时间信号处理通道差异地处理可植入心律管理装置中的心脏信号。 这种信号处理有效地使用下采样来使用较低的偏置电流，从而节省功率并延长植入器件的寿命，并且还减少时钟馈通，提供更宽的动态范围和更好地抑制电源噪声。 该装置包括连续时间缓冲器，抽取器/平均器和/或其他滤波器和/或放大器电路以及模数转换器，每个被配置用于处理差分信号。 器件还包括用于离散时间差分信号处理的运算跨导放大器（OTA）。 OTA除其他外还提供输出共模调整电路和偏移补偿电路。

    Reforming wet-tantalum capacitors in implantable defibrillators and other medical devices
    3.
    发明申请
    Reforming wet-tantalum capacitors in implantable defibrillators and other medical devices 有权
    在植入式除颤器和其他医疗设备中改造湿钽电容器

    公开(公告)号：US20040098058A1

    公开(公告)日：2004-05-20

    申请号：US10633942

    申请日：2003-08-04

    申请人： Cardiac Pacemakers, Inc.

    发明人： Robert S. Harguth ,  Ron Balczewski ,  William J. Linder ,  Gregory Scott Munson ,  Michael Wesley Paris

    IPC分类号： A61N001/362 ,  A61N001/37

    CPC分类号： A61N1/3956

    摘要： Miniature defibrillators and cardioverters detect abnormal heart rhythms and automatically apply electrical therapy to restore normal heart function. Critical components in these devices are aluminum electrolytic capacitors, which store and deliver one or more life-saving bursts of electric charge to a heart of a patient. This type of capacitor requires regular nullreformnull to preserve its charging efficiency over time. Because reform expends valuable battery life, manufacturers developed wet-tantalum capacitors, which are generally understood not to require reform. Yet, the present inventors discovered through extensive study that wet-tantalum capacitors exhibit progressively worse charging efficiency over time. Accordingly, to address this problem, the inventors devised unique reform techniques for wet-tantalum capacitors. One exemplary technique entails charging wet-tantalum capacitors to a voltage equal to about 90% of their rated voltage and maintaining this voltage for about five minutes before discharging them.

    摘要翻译： 微型除颤器和心脏转复器检测异常心律，并自动应用电疗法恢复正常的心脏功能。 这些设备中的关键部件是铝电解电容器，其将一个或多个拯救生命的电荷脉冲存储并传送到患者的心脏。 这种类型的电容器需要经常的“改造”以保持其充电效率随着时间的推移。 由于改造花费了宝贵的电池寿命，制造商开发了湿钽电容器，这通常被认为不需要改造。 然而，本发明人通过广泛的研究发现，湿钽电容器随着时间的推移呈现逐渐变差的充电效率。 因此，为了解决这个问题，本发明人为湿钽电容器设计了独特的改进技术。 一个示例性技术需要将湿钽电容器充电至等于其额定电压的约90％的电压，并在放电之前维持该电压约五分钟。

    Reforming wet-tantalum capacitors in implantable medical devices
    5.
    发明申请
    Reforming wet-tantalum capacitors in implantable medical devices 有权

    公开(公告)号：US20040186520A1

    公开(公告)日：2004-09-23

    申请号：US10801315

    申请日：2004-03-16

    申请人： Cardiac Pacemakers, Inc.

    发明人： Robert S. Harguth ,  Ron A. Balczewski ,  William J. Linder ,  Gregory S. Munson ,  Michael W. Paris

    IPC分类号： A61N001/39

    CPC分类号： H01G9/042 ,  A61N1/3956

    摘要： Miniature defibrillators and cardioverters detect abnormal heart rhythms and automatically apply electrical therapy to restore normal heart function. Critical to this function, aluminum-electrolytic capacitors store and deliver life-saving bursts of electric charge to the heart. This type of capacitor requires regular nullreformnull to preserve its charging efficiency over time. Because reform expends valuable battery energy, manufacturers developed wet-tantalum capacitors, which are generally understood not to require reform. Yet, the present inventors discovered through extensive study that wet-tantalum capacitors exhibit progressively worse charging efficiency over time. Accordingly, to address this problem, the inventors devised unique reform techniques for wet-tantalum capacitors. One exemplary technique entails charging wet-tantalum capacitors to a voltage equal to about 90% of their rated voltage and allowing the charge to dissipate through system leakage for a period of time, before discharging through a non-therapeutic load.

    Adapative telemetry system and method for an implantable medical device
    6.
    发明申请
    Adapative telemetry system and method for an implantable medical device 有权
    用于植入式医疗装置的适应性遥测系统和方法

    公开(公告)号：US20040127959A1

    公开(公告)日：2004-07-01

    申请号：US10638945

    申请日：2003-08-11

    申请人： Cardiac Pacemakers, Inc.

    发明人： Mark D. Amundson ,  William J. Linder ,  Karen M. Lent ,  Scott T. Mazar

    IPC分类号： A61N001/08

    CPC分类号： A61N1/37252 ,  Y10S128/903

    摘要： A system and method for transmitting telemetry data from an implantable medical device to an external device. A connection-oriented protocol is used to transmit data at a higher data rate while a burst mode protocol is used to transmit data a lower data rate. The lower data rate may be used for remote communications where the received signal is of lower power.

    摘要翻译： 一种用于将遥测数据从可植入医疗装置传送到外部装置的系统和方法。 以连接为导向的协议用于以更高的数据速率传输数据，而突发模式协议用于传输较低数据速率的数据。 较低的数据速率可用于接收信号功率较低的远程通信。

    Apparatus and method for treating ventricular tachyarrhythmias
    7.
    发明申请
    Apparatus and method for treating ventricular tachyarrhythmias 有权
    用于治疗室性快速性心律失常的装置和方法

    公开(公告)号：US20020107552A1

    公开(公告)日：2002-08-08

    申请号：US10008367

    申请日：2001-11-13

    申请人： Cardiac Pacemakers, Inc.

    发明人： David B. Krig ,  James O. Gilkerson ,  Robert D. Dreher ,  Jan D. Wald ,  William J. Linder ,  William L. Zimmer

    IPC分类号： A61N001/365

    CPC分类号： A61N1/3622 ,  A61N1/395 ,  A61N1/3962

    摘要： A system and method for selectively treating a ventricular tachycardia based on sensed atrial and ventricular intervals from the patient's heart. A detection window of the ten most recent atrial and ventricular intervals are analyzed for the occurrence of either tachycardia or fibrillation. When a majority of the sensed intervals are satisfied, the apparatus starts a duration time interval. Ventricular intervals and atrial intervals are compare, ventricular interval greater than the atrial interval by a bias factor the system delivers tachycardia therapy to the heart. Alternatively, the method withholds tachycardia therapy to the heart when the atrial rate is classified as atrial fibrillation and the ventricular response is unstable.

    摘要翻译： 一种系统和方法，用于根据来自患者心脏的感觉的心房和心室间隔选择性地治疗室性心动过速。 分析十个最近的心房和心室间隔的检测窗口，用于心动过速或颤动的发生。 当满足感测间隔的大部分时，设备开始持续时间间隔。 比较心室间隔和心房间隔，心室间隔大于心房间隔，系统将心动过速治疗提供给心脏。 或者，当心房率被分类为心房颤动和心室反应不稳定时，该方法禁止对心脏的心动过速治疗。