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    • 76. 发明授权
    • Atrial capture management during atrial and ventricular pacing
    • 心房和心室起搏过程中心房采集管理
    • US07130690B2
    • 2006-10-31
    • US10625344
    • 2003-07-23
    • John C. RueterTodd J. Sheldon
    • John C. RueterTodd J. Sheldon
    • A61N1/362
    • A61N1/3712A61N1/362A61N1/3714
    • In an atrial pacing system, the A-PACE pulse energy, defined by the pulse width and pulse amplitude, sufficient to reliably capture the atrium without being wasteful of battery energy is periodically determined in accordance with atrial capture management (ACM) algorithms. The ACM algorithms allow a slow intrinsic atrial heart rate that is suppressed by delivered A-PACE pulses resulting in A-CAPTURE and that occurs when delivered test A-PACE pulses result in ALOC to be detected. ALOC is declared if an A-EVENT of the slow intrinsic atrial heart rate is detected either during an ACM test window timed from the last delivered test A-PACE pulse or during delivery of a sequence of test A-PACE pulses delivered within or defining the ACM test window correlated to the slow intrinsic atrial heart rate.
    • 在心房起搏系统中,根据心房捕获管理(ACM)算法周期性地确定由脉冲宽度和脉冲幅度定义的足够可靠地捕获心房而不浪费电池能量的A-PACE脉冲能量。 ACM算法允许由传递的A-PACE脉冲抑制的内在心房心率慢,导致A-CAPTURE,并且当递送的测试A-PACE脉冲导致检测到ALOC时发生。 如果在从最后传送的测试A-PACE脉冲定时的ACM测试窗口期间或在递送在其中传送或定义的测试A-PACE脉冲序列期间检测到慢内在心房心率的A-EVENT,则ALOC被声明 ACM测试窗口与内在心房心率缓慢相关。
    • 77. 发明授权
    • Posture and device orientation and calibration for implantable medical
devices
    • 植入式医疗设备的姿势和设备定向和校准
    • US6044297A
    • 2000-03-28
    • US160647
    • 1998-09-25
    • Todd J. SheldonWilliam J. CombsMark K. EricksonCan Cinbis
    • Todd J. SheldonWilliam J. CombsMark K. EricksonCan Cinbis
    • A61N1/365A61N1/362
    • A61N1/36542A61N1/36535
    • A method of and apparatus for determining the physical posture of a patient's body, having a superior-inferior body axis, an anterior-posterior body axis and a lateral-medial body axis, in relation to earth's gravitational field. A medical device having first, second and, optionally, third accelerometers having sensitive axes mounted orthogonally within an implantable housing is adapted to be implanted with the sensitive axes nominally aligned with ideal X, Y and Z device axes correlated to patient body axes. Each accelerometer generates DC accelerometer signals having characteristic magnitudes and polarities on alignment of the sensitive axis with, against or normal to earth's gravitational field and DC accelerometer signals of varying magnitudes and polarities when not so aligned. The actual pitch and roll angles of the sensitive axes of the accelerometers in the implanted IMD with respect to the true gravitational axes are determined and the yaw angles are determined or estimated. Corrected DC accelerometer output signals are derived from the pitch, roll and yaw angles and are compared to a set of stored thresholds for each body posture to determine the actual body posture. Storage of these comparisons or the raw signals themselves can be used for histogram data to provide theraputic or research benefits also described.
    • 一种用于确定患者身体的物理姿势的方法和装置,其具有相对于地球重力场的上下身体轴线,前后身体轴线和侧向内侧身体轴线。 具有第一,第二和第三加速度计的医疗设备具有正交安装在可植入的外壳内的敏感轴,适于植入与名义上与理想的与患者体轴相关的X,Y和Z装置轴对准的敏感轴。 每个加速度计产生具有特征幅度和极性的特征幅度和极性的直流加速度计信号,当不对准时,敏感轴对准或反对或垂直于地球重力场和具有不同幅度和极性的直流加速度计信号。 确定和估计在植入的IMD中相对于真重力轴的加速度计的敏感轴的实际俯仰角和倾斜角,并且确定或估计偏航角。 校正的直流加速度计输出信号是从俯仰角,偏转角和偏航角度得出的,并且与每个身体姿势的一组存储的阈值进行比较,以确定实际的身体姿势。 这些比较或原始信号本身的存储可用于直方图数据,以提供还描述的治疗或研究益处。
    • 78. 发明授权
    • Rate responsive cardiac pacemaker and method for discriminating stair
climbing from other activities
    • 速率响应心脏起搏器和方法来区分爬梯与其他活动
    • US5725562A
    • 1998-03-10
    • US668524
    • 1996-06-28
    • Todd J. Sheldon
    • Todd J. Sheldon
    • A61N1/365
    • A61N1/36542A61N1/36585A61N1/36535
    • A method of and apparatus for pacing a patient's heart at a pacing rate dependent on patient activity and posture particularly during stair climbing. A dual chamber, rate responsive pacemaker for pacing a patient's heart includes at least one DC accelerometer mounted in the pacemaker pulse generator for implantation such that the sensitive axis of the DC accelerometer is sensitive to the effects of gravity during forward lean of the patient characteristic of stair climbing posture. The DC and AC signal outputs of the accelerometer are processed to develop a tilt signal and an activity signal. A target rate control signal is derived from the activity signal dependent on the level of activity. A stair climbing rate is selected for controlling the physiologic pacing rate between a lower and an upper pacing rate in the presence of an activity signal indicative of a patient walking rate and a tilt signal value falling within a tilt window. The target rate control signal is used to control the pacing rate if the activity signal is indicative of faster patient movement, e.g. running, or if the tilt signal is outside the tilt window indicating that the patient is either upright or prone.
    • 一种用于根据患者活动和姿势起搏患者心脏的起搏速度的方法和装置,特别是在楼梯攀爬期间。 用于起搏患者心脏的双室速率响应起搏器包括安装在起搏器脉冲发生器中用于植入的至少一个DC加速度计,使得DC加速度计的敏感轴对患者特征向前倾斜时的重力影响敏感 楼梯攀登姿势。 处理加速度计的直流和交流信号输出以产生倾斜信号和活动信号。 根据活动水平从活动信号导出目标速率控制信号。 在存在指示患者行走速度的活动信号和落在倾斜窗内的倾斜信号值的情况下,选择楼梯攀爬速率来控制较低和较高起搏速率之间的生理起搏速率。 如果活动信号表示更快的患者运动,则目标速率控制信号用于控制起搏速率,例如, 运行,或者如果倾斜信号在倾斜窗口之外,指示患者直立或倾向。
    • 80. 发明授权
    • Method of continuous capture verification in cardiac resynchronization devices
    • 心脏再同步装置中连续捕获验证的方法
    • US08417337B2
    • 2013-04-09
    • US12501691
    • 2009-07-13
    • James W. BusackerTodd J. Sheldon
    • James W. BusackerTodd J. Sheldon
    • A61N1/00
    • A61N1/3627A61N1/3684A61N1/371
    • In bi-ventricular pacing devices (including CRT devices) analysis of myocardial electrogram signals in one ventricle (e.g., a left ventricle, or “LV”) can be used to infer capture or loss-of-capture (LOC) of an earlier stimulus pulse in the same ventricle, on a continuous (every pacing cycle), triggered, aperiodic and/or periodic basis. Rather than using an evoked-response principle as has been the basis of capture detection in prior art and other systems, a principle employed via the present invention uses evidence of inter-ventricular conduction (i.e., from the opposite chamber) and/or atrio-ventricular conduction as evidence of LOC, since a non-capturing pacing stimulus provided to a first chamber will allow the myocardial tissue of the first chamber to remain non-refractory and thus inter-ventricular and atrio-ventricular wavefront propagation and conduction can commence and be detected thereby revealing whether LOC has occurred.
    • 在双心室起搏装置(包括CRT装置)中,可以使用一个心室(例如左心室或左心室)心肌电图信号的分析来推断早期刺激脉冲的捕获或丢失(LOC) 相同的心室,连续(每个起搏周期),触发,非周期性和/或周期性基础。 而不是使用诱发反应原理作为现有技术和其他系统中的捕获检测的基础,通过本发明采用的原理使用心室间传导(即,从相对的室)和/或心室传导的证据, 心室传导作为LOC的证据,因为提供给第一腔室的非捕获起搏刺激将允许第一腔室的心肌组织保持不耐受,因此可以开始心室间壁和心房内波前传播和传导 检测出来是否显示LOC是否发生。