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Method for determining gas content in a breathing apparatus, and a breathing apparatus operating according to the method

  • US 6,450,968 B1
  • Filed: 09/01/2000
  • Issued: 09/17/2002
  • Est. Priority Date: 09/09/1999
  • Status: Expired due to Fees
First Claim
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1. A method for determining a gas content of a gas component of breathing gas in a breathing apparatus, comprising the steps of:

  • connecting a breathing apparatus to a patient exhibiting a respiratory cycle;

    making at least one measurement of a speed of sound in said breathing gas and determining a gas content in said breathing gas from the speed of sound therein; and

    synchronizing measurement of the speed of sound in said breathing gas with at least one predetermined time in said respiratory cycle.

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