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

Claim 0:
1. A method for a medical gas flow device, comprising:
controlling at least one valve of the medical gas flow device to flow a first gas having a first oxygen concentration through an inspiratory flow passage having an oxygen sensor, and detecting, by the oxygen sensor, a first oxygen concentration calibration measurement at a first frequency;
controlling the at least one valve of the medical gas flow device to flow a second gas having a second oxygen concentration through the inspiratory flow passage having the oxygen sensor, and detecting, by the oxygen sensor, a second oxygen concentration calibration measurement at a second frequency that is less than the first frequency;
and
responsive to the second oxygen concentration calibration measurement decreasing by at least a threshold amount from the first oxygen concentration calibration measurement, estimating an end-of-life date of the oxygen sensor and outputting a replacement notification on a display of the medical gas flow device,
wherein estimating the end-of-life date of the oxygen sensor includes averaging a first end-of-life date determined based on the first oxygen concentration calibration measurement and a second end-of-life date determined based on the second oxygen concentration calibration measurement.