초록 ▼

An anesthesia delivery system having a means of determining the functioning of its gas mixer, vaporizer and analyzers, their accuracies and other characteristics by comparing, at high flow conditions, the input of oxygen concentration and agent concentration set by a clinician and delivered by the s

An anesthesia delivery system having a means of determining the functioning of its gas mixer, vaporizer and analyzers, their accuracies and other characteristics by comparing, at high flow conditions, the input of oxygen concentration and agent concentration set by a clinician and delivered by the system, the input from a feedback respiratory analyzer of the inspired O.sub.2 and agent concentrations and the input of a monitor analyzer that determines the O.sub.2 and agent concentrations in the patient circuit. A CPU compares the three sets of input data to make various determinations since, at high flow conditions, all of the three sets of data should be consistent. Thus the CPU can determine from a comparison, whether one set of data is indicative of a faulty device, can provide a bias adjustment if an analyzer is merely off in its readings or carry out other safety and corrective functions based on comparing the three data inputs.

대표청구항 ▼

[ We claim:] [1.] An anesthesia system for delivering a breathing gas containing a known anesthetic agent concentration to a patient, said anesthesia system comprising: a patient circuit for administering the breathing gas and anesthetic agent to the patient, said patient circuit having a wye connec

[ We claim:] [1.] An anesthesia system for delivering a breathing gas containing a known anesthetic agent concentration to a patient, said anesthesia system comprising: a patient circuit for administering the breathing gas and anesthetic agent to the patient, said patient circuit having a wye connector for connection to a patient through which inhaled and exhaled gases pass to and from a patient, a fresh gas supply providing a fresh gas to said patient circuit, said fresh gas supply comprising an electronic controlled gas mixer for providing a mixture of gases at a settable proportion and an electronic controlled vaporizer for introducing anesthetic agent vapor to the mixture of gases from said electronic controlled gas mixer, a CPU controlling said electronic controlled vaporizer and said electronic controlled mixer, a mixer setting device operable by a user to input to said CPU the concentration of at least one component of the breathing gas desired to be administered to a patient through said patient circuit, a first gas monitor for analyzing said at least one component at or near said wye connector, a second gas monitor detecting the concentration of said at least one component in the gas circulating within said patient circuit, means to cause a high flow of fresh gas to enter said patient circuit from said fresh gas supply, and said CPU including means to compare the concentration of said at least one component determined by said first gas monitor, said second gas monitor and the concentration of said at least one component inputted by a user with said input device when said high flow of gas is entering said patient circuit.