초록 ▼

A method and an arrangement in connection with vaporizing an anaesthetic, in which an anaesthetic, vaporized in a vaporizer is mixed with fresh gas and delivered to be inhaled by a patient. In order to achieve a reliable operation, the prevailing ambient air pressure is measured, the measured air pr

A method and an arrangement in connection with vaporizing an anaesthetic, in which an anaesthetic, vaporized in a vaporizer is mixed with fresh gas and delivered to be inhaled by a patient. In order to achieve a reliable operation, the prevailing ambient air pressure is measured, the measured air pressure is compared with a reference pressure and when the prevailing ambient air pressure deviates from the reference pressure, the anaesthetic agent concentration of the fresh gas/anaesthetic mixture to be passed to the patient is adjusted in relation to the variation in the ambient external air pressure.

대표청구항 ▼

[ We claim:] [1.] A method for mixing a vaporizable anaesthetic with fresh gas to form a breathing gas for a patient, said method controlling the concentration of anaesthetic in the breathing gas and comprising the steps of:providing a flow stream of fresh gas;supplying the anaesthetic to the fresh

[ We claim:] [1.] A method for mixing a vaporizable anaesthetic with fresh gas to form a breathing gas for a patient, said method controlling the concentration of anaesthetic in the breathing gas and comprising the steps of:providing a flow stream of fresh gas;supplying the anaesthetic to the fresh gas for mixing therewith to form a patient breathing gas containing vaporous anaesthetic;controlling the supply of anaesthetic to the fresh gas to establish a concentration of anaesthetic in the breathing gas;sensing ambient air pressure;comparing ambient air pressure with a reference air pressure value; andaltering the supply of anaesthetic to the fresh gas in accordance with said comparison to establish a desired concentration of anaesthetic in the breathing gas for the patient.