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    • 2. 发明授权
    • CIRCUIT FOR IMPLANTABLE DUAL SENSOR MEDICAL ELECTRICAL LEAD
    • 电路是否具有两个传感器植入医疗导线
    • EP1123132B1
    • 2005-03-02
    • EP99955127.8
    • 1999-10-22
    • Medtronic, Inc.
    • ROBERTS, Jonathan, P.ROLINE, Glenn, M.LEE, Brian, B.
    • A61N1/365
    • A61N1/36585
    • An implantable dual transducer apparatus for use with an implantable medical device and control method are disclosed. The dual transducer assembly includes two physiologic sensors coupled to the medical device via a pair of lead conductors. Switching circuitry is controlled by the medical device to selectively activate and deactivate the two physiologic sensors by application of a supply voltage of an appropriate polarity. Each sensor of the dual transducer assembly is connected to the pair of lead conductors through a respective power switch. In response to the polarity of the supply voltage applied to the lead conductors, the power switches activate or deactivate their respective sensor in an alternating manner. Selective activation of one of the sensors while concurrently deactivating the other sensor of the dual transducer assembly provides for reduced power consumption and reliable communication of sensor data and other information transmitted over the pair of lead conductors. The power switches may be constructed using diodes, including discrete or substrate diodes, or transistors, such as n-channel and p-channel transistors. A wide variety of physiologic sensors may be incorporated into the dual transducer assembly.
    • 4. 发明授权
    • SYSTEM AND COMPUTER PROGRAM FOR DERIVING A VIRTUAL ECG OR EGM SIGNAL
    • 系统和计算机程序DIVERT一个虚拟ECG或EGM信号
    • EP1357833B1
    • 2006-04-12
    • EP01997253.8
    • 2001-11-16
    • MEDTRONIC, INC.
    • LEE, Brian, B.PANKEN, Eric, J.REINKE, James, D.
    • A61B5/04
    • A61B5/04011A61B5/0402G06F19/00
    • A system and method for obtaining a virtual physiologic voltage signal between a first predetermined point in a second selected point in the body is disclosed. At least three electrodes are used to measure two voltage signals S1 and S2 in a body. In one embodiment, the signal S1 is measured between a first electrode and a common electrode, and the signal S2 is measured between a second electrode and the common electrode. A selected point within the body may be chosen to define a pair of virtual electrodes existing between this selected point and the common electrode. An approximation of the voltage signal S as could be measured between electrodes positioned at these virtual electrode locations may be derived as a function of S1, S2, and theta, wherein theta is the angle between the directional vector U1 for the signal S1 and the directional vector U for the signal S. According to the inventive system and method, the signal value for S is also dependent on the distances between the electrode pairs, on the angle beta between directional vectors U1 and U2, and on the distance between the virtual electrodes. The current invention may be utilized with electrodes that are positioned either externally on the surface of, or implanted within, a body. According to one aspect of the invention, a user may employ a user interface to select the values of theta, beta, and the electrode spacings. Alternatively, ones of these parameters may be predetermined by the system. In another embodiment, the system could derive the signal S over a predetermined range of values for the angle theta. The system may then select the angle of theta resulting in the derived signal S that exhibits a desired waveform morphology.
    • 8. 发明公开
    • CIRCUIT AND METHOD FOR IMPLANTABLE DUAL SENSOR MEDICAL ELECTRICAL LEAD
    • 电路是否具有两个传感器植入医疗导线
    • EP1123132A1
    • 2001-08-16
    • EP99955127.8
    • 1999-10-22
    • MEDTRONIC, INC.
    • ROBERTS, Jonathan, P.ROLINE, Glenn, M.LEE, Brian, B.
    • A61N1/365
    • A61N1/36585
    • An implantable dual transducer apparatus for use with an implantable medical device and control method are disclosed. The dual transducer assembly includes two physiologic sensors coupled to the medical device via a pair of lead conductors. Switching circuitry is controlled by the medical device to selectively activate and deactivate the two physiologic sensors by application of a supply voltage of an appropriate polarity. Each sensor of the dual transducer assembly is connected to the pair of lead conductors through a respective power switch. In response to the polarity of the supply voltage applied to the lead conductors, the power switches activate or deactivate their respective sensor in an alternating manner. Selective activation of one of the sensors while concurrently deactivating the other sensor of the dual transducer assembly provides for reduced power consumption and reliable communication of sensor data and other information transmitted over the pair of lead conductors. The power switches may be constructed using diodes, including discrete or substrate diodes, or transistors, such as n-channel and p-channel transistors. A wide variety of physiologic sensors may be incorporated into the dual transducer assembly.