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Pulse detection method and apparatus using patient impedance

  • US 8,663,121 B2
  • Filed: 01/15/2010
  • Issued: 03/04/2014
  • Est. Priority Date: 12/06/2001
  • Status: Expired due to Term
First Claim
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1. A method of determining the presence of a cardiac pulse in a patient, comprising:

  • (a) obtaining data derived from an impedance-sensing signal that has been communicated from the patient;

    (b) analyzing the obtained impedance signal data for a feature indicative of the presence of a cardiac pulse, wherein analyzing the impedance signal data includes comparing the impedance signal data to a previously-identified impedance signal data pattern known to predict the presence of a cardiac pulse; and

    (c) determining whether a cardiac pulse is present in the patient based on the feature in the impedance signal data.

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