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    • 13. 发明授权
    • Subcutaneous cardiac stimulator with small contact surface electrodes
    • 具有小接触表面电极的皮下心脏刺激器
    • US07194302B2
    • 2007-03-20
    • US10124159
    • 2002-04-17
    • Gust H. BardyRiccardo CappatoAlan H. OstroffWilliam J. RissmannGary H. Sanders
    • Gust H. BardyRiccardo CappatoAlan H. OstroffWilliam J. RissmannGary H. Sanders
    • A61N1/39
    • A61N1/3931A61N1/3912
    • A subcutaneous cardiac device includes two electrodes and a stimulator that generates a pulse to the electrodes. The electrodes are implanted between the skin and the rib cage of the patient and are adapted to generate an electric field corresponding to the pulse, the electric field having a substantially uniform voltage gradient as it passes through the heart. The shapes, sizes, positions and structures of the electrodes are selected to optimize the voltage gradient of the electric field, and to minimize the energy dissipated by the electric field outside the heart. More specifically, the electrodes have contact surfaces that contact the patient tissues, said contact surfaces having a total contact area of less than 100 cm2. In one embodiment, one or both electrodes are physically separated from the stimulator. In another embodiment a unitary housing holds the both electrodes and the stimulator. Sensor circuitry may also includes in the stimulator for detecting intrinsic cardiac activity through the same electrodes.
    • 皮下心脏装置包括两个电极和一个向电极产生脉冲的刺激器。 电极被植入患者的皮肤和肋骨架之间,适于产生对应于该脉冲的电场,该电场在通过心脏时具有基本均匀的电压梯度。 选择电极的形状,尺寸,位置和结构以优化电场的电压梯度,并且使由心脏外的电场消耗的能量最小化。 更具体地,电极具有接触患者组织的接触表面,所述接触表面的总接触面积小于100cm 2。 在一个实施例中,一个或两个电极与刺激器物理分离。 在另一个实施例中,整体外壳保持两个电极和刺激器。 传感器电路还可以包括在用于通过相同电极检测固有心脏活动的刺激器中。