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Apparatus and method for breath monitoring

  • US 6,213,955 B1
  • Filed: 10/08/1998
  • Issued: 04/10/2001
  • Est. Priority Date: 10/08/1998
  • Status: Expired due to Term
First Claim
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1. Apparatus for breath monitoring by sensing respiratory air flow from the nostrils of the nose and/or the mouth of the face of a patient comprising an acoustical device for receiving less than the actual air volume exhaled and inhaled adapted to be positioned on the face of the patient in the vicinity of the nose and/or mouth of the patient and having at least one acoustic space adapted to receive respiratory air flow from the patient, a change sensing sensor exposed to the acoustic space for sensing turbulence and/or pressure changes and/or sound in the respiratory air flow in the acoustic space and providing an electrical output signal serving as the sole means for sensing respiratory air flow from the patient and means for processing the electrical output signal including means for providing an estimated volume of air flow to provide a real-time signal indicative of breathing of the patient.

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