METHOD AND ARRANGEMENT FOR CONTROLLING NARCOTIC EFFECT VALUE OF BREATHING GAS

摘要

A method for controlling a narcotic effect value of a mixture of at least two narcotic agents of a breathing gas is disclosed herein. The method includes setting a target value for a desired narcotic effect of narcotic agents and measuring a breathing gas concentration of each narcotic agent of the breathing gas. The method also includes converting measured breathing gas concentration of each narcotic agent to a narcotic effect value of the breathing gas and calculating a total narcotic effect value of the mixture of the at least two narcotic agents. The method also includes comparing the total narcotic effect value with the target value and determining whether or not to change the breathing gas concentration to meet the target value.