Non-invasive cardiorespiratory monitor with synchronized bioimpedance sensing
AssigneeIntermedics, Inc.
InventorDavid Prutchi
Life of this patent
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Abstract
A cardiorespiratory monitor that generates bioimpedance sensing signals that produce substantially no interference with bioimpedance signals generated by implanted devices. The monitor detects the bioimpedance signal generated by the implanted device, using a voltage detector or a telemetry circuit, for example. The monitor analyzes this detected signal to generate a bioimpedance sensing signal that will not interfere with the sensed signal. For instance, if the monitor produces a pulsed sensing signal, the pulses are delivered in an interval of the detected signal where no pulses are present. Similarly, if the monitor produces a high frequency AC sensing signal, the zero crossings of the AC sensing signal are positioned during the delivery of a pulse by the implanted device.
Claims25
A method of sensing bioimpedance, the method comprising:
- detecting impedance sensing signals generated by a first device;
- determining timing between the impedance sensing signals generated by the first device for a bioimpedance sensing signal to be generated by a second device;
- and
- delivering the bioimpedance sensing signal by the second device.
A method, comprising:
- detecting a first bioimpedance sensing signal in a body;
- and
- analyzing the detected first bioimpedance signal to determine a time for delivery of a further bioimpedance signal such that the bioimpedance signals do not significantly interfere with each other.
A method, comprising:
- detecting a first signal corresponding to bioimpedance sensing signal;
- and
- analyzing the first signal to determine a time for delivery of a further bioimpedance signal such that the bioimpedance signals do not significantly interfere with each other.
A device, comprising:
- a monitor that detects impedance sensing signals in a torso;
- and
- a circuit that senses impedance in the torso between the impedance sensing signals.
A system, comprising:
- a torso implanted pacemaker that generates bioimpedance sensing signals;
- a monitor that detects the bioimpedance sensing signals in the torso;
- and
- a circuit that senses bioimpedance in the torso between the bioimpedance sensing signals.
Dependencies are inferred from the claim text.