Patent ID: 6024087
Filing Date: 2000-02-15
Classification: A61M

Abstract:
An emergency oxygen system for an anesthesia system, said system comprising;an oxygen conduit for delivering oxygen from a source of oxygen to an outlet,a gas conduit for delivering at least one other gas from a source of at least one other gas, said gas conduit having a shut-off valve in said conduit for controlling the flow of gas from said source of said at least one other gas,a first flow control valve in said oxygen conduit and a second flow control valve in said gas conduit, said first and second flow control valves adapted to establish a desired proportion of oxygen and said at least one other gas to supply a mixed gas in the desired proportion to said outlet through a supply conduit coupled to said oxygen conduit and gas conduit,a processor controlling the condition of said first and second flow control valves to achieve the desired proportion of oxygen and said at least one other gas at said outlet,gas sensors located downstream of each of said first and second flow control valves and upstream of said supply conduit, to monitor the mixture of gases from said first and second flow control valves to determine that said control valves are providing the desired proportion of oxygen and the at least one other gas,a bypass conduit for said oxygen conduit and connected so as to allow oxygen to bypass said first flow control valve, said bypass conduit having a means to control the flow of gas through said bypass conduit,means to close the shut off valve in the said gas conduit if the said gas sensors indicate the proportion of oxygen is not within a desired range, andalarm means to provide an indication to a user that the proportion of oxygen is not within the desired range.