초록 ▼

In a fresh gas system and a method for vaporizing a liquid anaesthetic in an anaesthetic machine, a gas preparation unit prepares a flow of fresh gas having a gas mixture from at least two sources of gas, the gas mixture is passed through a vaporizer where it picks up a quantity of anaesthetic relat

In a fresh gas system and a method for vaporizing a liquid anaesthetic in an anaesthetic machine, a gas preparation unit prepares a flow of fresh gas having a gas mixture from at least two sources of gas, the gas mixture is passed through a vaporizer where it picks up a quantity of anaesthetic related to the viscosity of the gas mixture. A control device controls the gas preparation unit. An arrangement is connected upstream from the vaporizer and is connected to the control device, for determining the composition of the gas mixture. The control device compensates the fresh gas system for the gas mixture's composition so that a specific amount of anaesthetic is always picked up by the gas mixture, regardless of the mixture's composition.

대표청구항 ▼

[ I claim as my invention:] [1.] A fresh gas system for use in an anaesthetic machine, said fresh gas system comprising:at least two gas sources containing respectively different gases;a gas preparation unit connected to said at least two gas sources for preparing a flow of fresh gas comprising a ga

[ I claim as my invention:] [1.] A fresh gas system for use in an anaesthetic machine, said fresh gas system comprising:at least two gas sources containing respectively different gases;a gas preparation unit connected to said at least two gas sources for preparing a flow of fresh gas comprising a gas mixture of at least said two different gases, said gas mixture having a unique viscosity;a vaporizer in communication with said gas preparation unit, through which said gas mixture is passed, said gas mixture in said vaporizer picking up a quantity of anaesthetic dependent on the viscosity of said gas mixture;means for determining a composition of said gas mixture disposed upstream from said vaporizer and for emitting a signal identifying said composition; andcontrol means, supplied with said signal, for controlling said gas preparation unit for compensating for the composition of the gas mixture for causing a predetermined amount of anaesthetic to be picked up by said gas mixture in said vaporizer independently of the composition of said mixture.