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Automatic respiratory gas monitoring system

  • US 3,927,670 A
  • Filed: 01/05/1973
  • Issued: 12/23/1975
  • Est. Priority Date: 01/05/1973
  • Status: Expired due to Term
First Claim
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1. A system for monitoring respiratory gases, which comprises:

  • means for withdrawing respiratory gases from the airway of at least one patient, means for rapidly analyzing the withdrawn gases and for developing analog waveforms in response to the analyzation of the withdrawn gases where the waveforms are representative of fractional concentrations of the withdrawn gases, means responsive to the developed analog waveforms for developing voltage levels proportional to the maxima and minima of the developed analog waveforms where the maxima and minima of the waveforms are representative of monitored values of inspired and expired respiratory gases, and means responsive to the developed voltage levels for displaying in visual form an indication of the maxima and minima values.

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