Acoustic pulse and respiration monitoring system

  • US 10,441,181 B1
  • Filed: 03/03/2015
  • Issued: 10/15/2019
  • Est. Priority Date: 03/13/2013
  • Status: Active Grant
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First Claim
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1. A physiological monitoring system configured to non-invasively detect acoustic vibrations indicative of one or more physiological parameters of a medical patient, the physiological monitoring system comprising:

  • an acoustic sensor associated with a transfer function, the transfer function indicative of a transform caused by at least one of processing circuitry of the acoustic sensor or a piezoelectric membrane of the acoustic sensor, wherein the acoustic sensor is configured to be attached to a medical patient, detect acoustic vibrations associated with the medical patient, and generate a patient signal indicative of the acoustic vibrations, wherein the transfer function of the acoustic sensor has an effect on the patient signal such that the patient signal can be modeled as a derivative with respect to time of a signal indicative of the acoustic vibrations;

    a memory configured to store the transfer function of the acoustic sensor; and

    a processor in communication with the acoustic sensor and the memory, and configured to;

    retrieve, from the memory, the transfer function of the acoustic sensor,determine the transfer function of the acoustic sensor based at least in part on the transfer function of the acoustic sensor,deconvolve the patient signal using the transfer function of the acoustic sensor to lessen the effect of the transfer function on the patient signal to generate a deconvolved patient signal indicative of the acoustic vibrations,estimate a physiological parameter of the medical patient based at least in part on the deconvolved patient signal, wherein the physiological parameter includes at least one of a respiratory parameter or a cardiac parameter, andoutput an indication of the estimated physiological parameter for presentation to a care giver.

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