초록 ▼

An emergency oxygen system that provides a flow of oxygen to the patient undergoing anesthesia in the event of a detected fault in the overall supply and mixing system of the anesthesia system. The normal design of such supply and mixing systems for an anesthesia system provides oxygen and at least

An emergency oxygen system that provides a flow of oxygen to the patient undergoing anesthesia in the event of a detected fault in the overall supply and mixing system of the anesthesia system. The normal design of such supply and mixing systems for an anesthesia system provides oxygen and at least one other gas that are mixed together in a desired proportion to be provided to a vaporizer and then to the anesthesia system as fresh gas. In the present system, a processor continuously monitors the output flows from those proportioning mixing valves. When the processor determines that those flows from the proportioning valves are off by a predetermined amount, indicative of a fault in the system, the processor immediately shuts off the supply of any gases other than oxygen and also provides a flow of oxygen to a bypass line that bypasses the oxygen proportioning valve, thus assuring a supply of oxygen to the patient despite the fault. A manual valve may be included in the bypass line so that the clinician can control the flow of oxygen and a flowmeter is provided so the clinician can visually note the flow and control that flow accordingly.

대표청구항 ▼

[ We claim:] [1.] 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 v

[ We claim:] [1.] 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.