Surgery – Respiratory method or device – Means for mixing treating agent with respiratory gas
Patent
1998-11-13
2000-12-05
Weiss, John G.
Surgery
Respiratory method or device
Means for mixing treating agent with respiratory gas
12820312, 12820325, 12820423, A61M 1500
Patent
active
061552569
ABSTRACT:
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.
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Operating Manual for Halothane Vaporizer 950, Enflurane Vaporizer 951, Isoflurane Vaporizer 952, Siemens-Elema AB (1988).
Siemens Elema AB
Srivastava V.
Weiss John G.
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