Method and apparatus for controlling the common mode impedance
misbalance of an isolated single-ended circuit
    3.
    发明授权
    Method and apparatus for controlling the common mode impedance misbalance of an isolated single-ended circuit 有权
    用于控制隔离单端电路的共模阻抗不平衡的方法和装置

    公开(公告)号:US6133787A

    公开(公告)日:2000-10-17

    申请号:US306644

    申请日:1999-05-06

    IPC分类号: H03F1/56 H03F3/45 H03F1/00

    摘要: A method and apparatus for controlling the common mode impedance misbalance of an isolated single-ended circuit for all common mode paths, thereby allowing the balancing of the common mode impedances which reduces common mode effects while maintaining the advantages of the single-ended amplifier including circuit simplicity and the reference input connected to circuit ground. In one embodiment, two solid shields enclose the circuit as completely as possible with the inner shield connected to circuit ground which is also the reference for all other inputs to the circuit. A discrete capacitor is connected between the outer shield and each of the non-reference inputs. When the shield is complete, i.e., solid, almost solid with minimal holes or a fine mesh, the value of the discrete capacitor is selected to match the parasitic capacitance formed between the outer shield and the inner shield. In another embodiment, the shield may be incomplete, i.e., a grid, coarse mesh or a solid shield only enclosing a portion of the circuit; this shield is connected to the non-reference input of the circuit. In this case, the exposures of the incomplete outer shield and the electronic circuit ground plane (or inner shield) to an external noise source are matched to balance the effect of their parasitic capacitances. Also, in the case of an incomplete shield, a discrete capacitor may be connected between the outer shield and the non-reference input of the circuit to enable balancing the impedances to common mode currents.

    摘要翻译: 一种用于控制用于所有共模路径的隔离单端电路的共模阻抗不平衡的方法和装置,从而允许平衡共模阻抗,其降低共模效应,同时保持包括电路的单端放大器的优点 简单性和参考输入连接到电路接地。 在一个实施例中,两个固体屏蔽件使电路尽可能完全地与连接到电路接地的内部屏蔽件封闭,该内部屏蔽件也是电路的所有其它输入的基准。 分离电容器连接在外屏蔽和每个非参考输入之间。 当屏蔽完成时,即固体,几乎固体具有最小的孔或细网格时,选择分立电容器的值以匹配在外屏蔽和内屏蔽之间形成的寄生电容。 在另一个实施例中,屏蔽可能是不完整的,即栅格,粗网或纯屏蔽仅包围电路的一部分; 该屏蔽连接到电路的非参考输入。 在这种情况下,匹配不完整的外屏蔽和电子电路接地层(或内部屏蔽)到外部噪声源的曝光以平衡其寄生电容的影响。 另外,在不完整的屏蔽的情况下,可以在外屏蔽和电路的非参考输入端之间连接分立电容器,以使阻抗平衡到共模电流。

    Common therapy/data port for a portable defibrillator
    4.
    发明授权
    Common therapy/data port for a portable defibrillator 失效
    便携式除颤器的常用治疗/数据端口

    公开(公告)号:US5716380A

    公开(公告)日:1998-02-10

    申请号:US632177

    申请日:1996-04-15

    IPC分类号: A61B5/0402 A61N1/00 A61N1/39

    CPC分类号: A61N1/3925 A61N1/3931

    摘要: A portable defibrillator (10) with a common therapy/data port (12). A set of electrodes (34) is connected to the therapy/data port to connect the defibrillator to a patient. If connected to a patient, the defibrillator operates in a normal mode of operation where it analyzes a patient's electrocardiogram (ECG), and, if required, applies defibrillation therapy through the port to the patient. A communication cable (42) is connected to the therapy/data port to connect the defibrillator to an auxiliary component (44). If connected to an auxiliary component, the defibrillator operates in a data communication mode of operation where data may be transmitted to and received from the auxiliary component through the therapy/data port. A test cable is connected to the therapy/data port to connect the defibrillator to a test load. If connected to a test load, the defibrillator operates in a user test mode of operation to allow a user to test the operation of the defibrillator. Preferably, the portable defibrillator automatically determines whether it is connected to a patient, an auxiliary component, or a test load.

    摘要翻译: 一种具有共同治疗/数据端口(12)的便携式除颤器(10)。 一组电极(34)连接到治疗/数据端口以将除颤器连接到患者。 如果连接到患者,除颤器在其分析患者的心电图(ECG)的正常操作模式下操作,并且如果需要,通过端口将除颤治疗应用于患者。 通信电缆(42)连接到治疗/数据端口,以将除颤器连接到辅助部件(44)。 如果连接到辅助部件,则除颤器在数据通信操作模式下工作,其中数据可以通过治疗/数据端口发送到辅助部件并从辅助部件接收。 测试电缆连接到治疗/数据端口,以将除颤器连接到测试负载。 如果连接到测试负载,除颤器在用户测试操作模式下操作,以允许用户测试除颤器的操作。 优选地,便携式除颤器自动地确定其是否连接到患者,辅助部件或测试负载。

    Interactive portable defibrillator including ECG detection circuit

    公开(公告)号:US4619265A

    公开(公告)日:1986-10-28

    申请号:US776391

    申请日:1985-09-16

    摘要: A portable, interactive medical electronic device exemplified by a defibrillator. The device obtains information about a patient's condition, such as ECG and transthoracic impedance data, directly from the patient, and information pertinent to the treatment of the patient indirectly through an operator of the device, and produces a medically appropriate action such as a defibrillation shock in response. Indirect information is obtained through information processing means that includes means for prompting the operator of the device and means for receiving the operator's responses thereto. Prompts may include both questions and instructions, and in one embodiment the information processing means obtains the assent of the operator before causing the defibrillation shock. Indirect information may include information as to whether the patient is conscious, and as to whether or not cardiopulmonary resuscitation has been performed. The ECG and transthoracic impedance data may be collected through a common pair of electrodes. In one embodiment the device produces an indication that the ECG data is invalid if the transthoracic impedance data indicates excessive motion on the part of the patient. When a defibrillation shock is determined to be medically appropriate, a control signal is produced that causes the charging of an energy storage means and the subsequent discharging of such energy storage means through the patient without further operator intervention. The device also includes a tape recorder for allowing later analysis of the use of the device, and means for holding the tape recorder drive means in a disengaged position until the device is opened for use. The device also includes testing means for enabling a person to test the condition of the device without opening the case in which it is enclosed, means for producing and recording a distinctive sound when and if a defibrillation pulse is delivered, and means for allowing the electrodes to be quickly disconnected so that emergency personnel can conveniently use the electrodes with their own equipment.

    Interactive portable defibrillator

    公开(公告)号:US4610254A

    公开(公告)日:1986-09-09

    申请号:US587439

    申请日:1984-03-08

    摘要: A portable, interactive medical electronic device exemplified by a defibrillator. The device obtains information about a patient's condition, such as ECG and transthoracic impedance data, directly from the patient, and information pertinent to the treatment of the patient indirectly through an operator of the device, and produces a medically appropriate action such as a defibrillation shock in response. Indirect information is obtained through information processing means that includes means for prompting the operator of the device and means for receiving the operator's responses thereto. Prompts may include both questions and instructions, and in one embodiment the information processing means obtains the assent of the operator before causing the defibrillation shock. Indirect information may include information as to whether the patient is conscious, and as to whether or not cardiopulmonary resuscitiation has been performed. The ECG and transthroacic impedance data may be collected through a common pair of electrodes. In one embodiment the device produces an indication that the ECG data is invalid if the transthoracic impedance data indicates excessive motion on the part of the patient. When a difibrillation shock is determined to be medically appropriate, a control signal is produced that causes the charging of an energy storage means and the subsequent discharging of such energy storage means through the patient without further operator intervention. The device also includes a tape recorder for allowing later analysis of the use of the device, and means for holding the tape recorder drive means in a disengaged position until the device is opened for use. The device also includes testing means for enabling a person to test the condition of the device without opening the case in which it is enclosed, means for producing and recording a distinctive sound when and if a defibrillation pulse is delivered, and means for allowing the electrodes to be quickly disconnected so that emergency personnel can conveniently use the electrodes with their own equipment.