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Body-worn sensor for characterizing patients with heart failure

  • US 9,974,444 B2
  • Filed: 12/31/2013
  • Issued: 05/22/2018
  • Est. Priority Date: 12/31/2012
  • Status: Active Grant
First Claim
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1. A system worn entirely on a body of a patient for measuring heartbeat-induced impedance pulses, ECG signals, and motion signals exclusively from the patient'"'"'s chest, comprising:

  • a monitoring system comprising both rigid and flexible substrates supporting electrical circuit components, the monitoring system configured to rest on the patient'"'"'s chest and not wrap around the patient'"'"'s chest;

    an impedance-measuring system integrated within the monitoring system, the impedance-measuring system comprising an analog impedance circuit in electrical contact with at least two electrodes and configured to receive a first set of electrical signals from the patient'"'"'s chest and process them to determine the heartbeat-induced impedance pulses exclusively from the patient'"'"'s chest;

    an ECG-measuring system integrated within the monitoring system, the ECG-measuring system comprising an analog ECG circuit in electrical contact with at least two electrodes and configured to receive a second set of electrical signals from the patient'"'"'s chest and process them to determine the ECG signals;

    a motion-measuring system connected to the monitoring system, the motion-measuring system comprising a motion-detecting circuit and configured to generate a set of motion signals in response to the patient'"'"'s movements;

    a data-processing system connected to the monitoring system and in electrical contact with the impedance-measuring system, the ECG-measuring system, and the motion-measuring system, the data-processing system comprising a microprocessor configured to operate a set of computer algorithms configured to process the heartbeat-induced impedance pulses, the ECG signal, and the motion signal;

    a wireless transmitter integrated connected to the monitoring system and in electrical contact with the data-processing system, the wireless transmitter configured to transmit processed values of the heartbeat-induced impedance pulses, the ECG signal, and the motion signal; and

    a battery system comprising a battery in electrical contact with and configured to power the impedance-measuring system, the ECG-measuring system, the motion-measuring system, the data-processing system, and the wireless transmitter.

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