US 11,944,755 B2
Methods and system for oxygen sensor prognostics in a medical gas flow device
Chandra Aloke Kopalli, Bangalore (IN)
Assigned to GE Precision Healthcare LLC, Milwaukee, WI (US)
Filed by GE Precision Healthcare LLC, Milwaukee, WI (US)
Filed on Apr. 21, 2020, as Appl. No. 16/854,796.
Prior Publication US 2021/0322709 A1, Oct. 21, 2021
Int. Cl. A61M 16/10 (2006.01); A61M 16/00 (2006.01); A61M 16/01 (2006.01)
CPC A61M 16/1005 (2014.02) [A61M 16/0051 (2013.01); A61M 16/01 (2013.01); A61M 16/024 (2017.08); A61M 2016/1025 (2013.01)] 15 Claims
OG exemplary drawing
 
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.