Patent ID: 7481215
Filing Date: 2009-01-27
Classification: A61M

Abstract:
1. An anesthetic evaporator comprising: a gas inlet for a carrier gas; a gas outlet; a first bypass line with a first throttle defining a bypass gap between the gas inlet and the gas outlet; a liquid evaporator with an evaporator chamber; an evaporator duct extending from the evaporator chamber via a second throttle to the gas outlet; a differential pressure pick-up for detecting the differential pressure between the first bypass line, upstream of the first throttle, and the duct upstream of said second throttle; a ventilation duct which is open toward the environment; and a switchover means at the first throttle for connecting the gas inlet directly with the gas outlet via a second bypass line and to bridge over the first throttle and via a third bypass line connected to the ventilation duct in a first switching position and to establish the gas flow from the gas inlet to the gas outlet via the first bypass line in a second switching position, said vaporator duct being in communication with said ventilation duct via said first bypass line and said third bypass line when said switchover means is in said first switching position such that the pressure within said first bypass line and said evaporator duct is at a almospheric pressure.