Patent ID: 11944755
Assignee: GE PRECISION HEALTHCARE LLC
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A

Claim 12:
13. A system for a medical gas flow device, comprising:
an inspiratory flow passage configured to flow a first gas and a second gas from at least one gas source to a patient breathing circuit;
one or more valves configured to control flow of the first gas and the second gas through the inspiratory flow passage;
an oxygen sensor positioned in the inspiratory flow passage;
a display configured to display information; and
a controller including instructions stored in non-transitory memory that, when executed, cause the controller to:
control the one or more valves to provide a first flow of the first gas having a first oxygen concentration through the inspiratory flow passage;
detecting a first voltage output by the oxygen sensor during the first flow;
control the one or more valves to provide a second flow of the second gas having a second oxygen concentration through the inspiratory flow passage;
detecting a second voltage output by the oxygen sensor during the second flow; and

monitor depletion of the oxygen sensor by tracking the output voltage recorded during the calibration routine over time by extrapolating an end of life date of the oxygen sensor based on a difference between the first voltage and the second voltage;
control the display to output a lower priority oxygen sensor replacement notification based on the extrapolated end-of-life date being greater than a threshold duration; and control the display to output a higher priority oxygen sensor replacement notification responsive to the extrapolated end-of-life date being less than the threshold duration.