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Wearable cardiac defibrillator (WCD) system controlling conductive fluid deployment per impedance settling at terminal value

  • US 9,895,548 B2
  • Filed: 06/06/2017
  • Issued: 02/20/2018
  • Est. Priority Date: 01/23/2013
  • Status: Active Grant
First Claim
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1. A wearable defibrillator system, comprising:

  • a support structure configured to be worn by a patient;

    an energy storage module configured to store a charge;

    two electrodes coupled with the support structure and configured to be applied to two respective patient locations of the patient;

    an impedance measurement circuit configured to sense an impedance between the two electrodes;

    a reservoir coupled to the support structure and configured to store a fluid; and

    a fluid deploying mechanism configured to cause at least some of the stored fluid to be released from the reservoir and to be deployed near at least one of the patient locations, so as to cause the impedance sensed by the measurement circuit to be decreased, andin which the stored charge is delivered to the patient locations via the electrodes after the sensed impedance has a value that changes less than a threshold in a given amount of time.

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