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Breathing sound analysis for detection of sleep apnea/popnea events

  • US 7,559,903 B2
  • Filed: 03/28/2007
  • Issued: 07/14/2009
  • Est. Priority Date: 03/28/2007
  • Status: Active Grant
First Claim
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1. Apparatus for use in analysis of breathing of a patient during sleep for detection of apnea comprising:

  • a microphone arranged to be located on the patient for detecting breathing sounds;

    a transmitter at the patient for transmitting signals from the breathing sounds to a remote location;

    a detector module for receiving and analyzing the signals to extract data relating to the breathing;

    the detector module being arranged to analyze the signals to generate an estimate of air flow while extracting extraneous sounds related to snoring or heart;

    the detector module being arranged to analyze the estimate of air flow to detect periods of apnea or hypopnea;

    and a display of the detected apnea or hypopnea episodes and related information for a clinician;

    wherein the detector module is arranged to generate an estimate of air flow during breathing by calculating a function representing the range of the signals which is defined as the log of the difference between minimum and maximum of the signal within each window of data.

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