Non-invasive monitoring of respiratory rate, heart rate and apnea

  • US 8,641,631 B2
  • Filed: 04/08/2005
  • Issued: 02/04/2014
  • Est. Priority Date: 04/08/2004
  • Status: Active Grant
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First Claim
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1. A method for estimating a respiratory rate of a patient comprising the steps of:

  • receiving respiratory sound data representing respiratory sounds of the patient;

    deriving a plurality of respiratory rates from said respiratory sound data with a processor using a plurality of different respiratory rate estimating methods, wherein the plurality of different respiratory rate estimating methods comprises a plurality of envelope related methods, at least one of the envelope related methods being performed in a time domain and at least another of the envelope methods being performed in a frequency domain; and

    applying a heuristic to said plurality of derived respiratory rates, said heuristic selecting one of said derived respiratory rates to output for display to a clinician;

    wherein said selected respiratory rate is the estimated respiratory rate.

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