| 摘要 |
A fresh gas system (2) in an anaesthetic machine, comprising a gas preparation unit (4, 8, 10) for preparing a flow of fresh gas consisting of a gas mixture from at least two sources of gas (6, 12A, 12B), a vaporiser (14) through which the gas mixture is passed to pick up a quantity of anaesthetic related to the viscosity of the gas mixture and a control device (18) for controlling the gas preparation unit (4, 8, 10), is described. When the fresh gas system (2) is devised with a means (4A, 8A, 10A; 20; 22, 24), upstream from the vaporiser (14) and connected to the control device (18), for determining the composition of the gas mixture, the control device (18) can be devised to compensate the fresh gas system for the gas mixture's composition in such a way that a specific amount of anaesthetic is always picked up by the gas mixture, regardless of the mixture's composition. <IMAGE> |
