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Arrangement and process for controlling a numerical value for patient respiration

  • US 20020014236A1
  • Filed: 03/22/2001
  • Published: 02/07/2002
  • Est. Priority Date: 03/25/2000
  • Status: Active Grant
First Claim
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1. A patient respiration numerical value control circuit arrangement comprising:

  • a respiration circuit with a Y-piece for delivering a gaseous anesthetic mixture to the lungs of a patient connected thereto;

    a metering device for metering at least one anesthetic in the gaseous anesthetic mixture;

    an electroencephalogram (EEG) control with an EEG sensor connected to the brain of the patient via head electrodes for measuring an EEG actual value, a EEG set point transducer for sending an EEG set point, an EEG comparison point, which forms the difference between the EEG actual value and the EEG set point, and a EEG controller, which forms a manipulated variable from the difference for the metering device so that when the EEG set point is exceeded by the EEG actual value, the percentage of at least one anesthetic in the gaseous anesthetic mixture is increased by the metering device and when the EEG actual value drops below the EEG set point, the percentage of at least one anesthetic in the gaseous anesthetic mixture is reduced by the metering device until the EEG actual value and the EEG set point agree.

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