US 11,896,767 B2
Model-driven system integration in medical ventilators
Nancy F. Dong, Carlsbad, CA (US); Gabriel Sanchez, Valley Center, CA (US); and Kun Li, San Diego, CA (US)
Assigned to Covidien LP, Mansfield, MA (US)
Filed by Covidien LP, Mansfield, MA (US)
Filed on Feb. 18, 2021, as Appl. No. 17/178,349.
Claims priority of provisional application 62/992,257, filed on Mar. 20, 2020.
Prior Publication US 2021/0290883 A1, Sep. 23, 2021
Int. Cl. A61M 16/08 (2006.01); A61M 16/00 (2006.01); A61M 16/20 (2006.01); G16H 20/40 (2018.01); G16H 40/63 (2018.01); G16H 40/40 (2018.01)
CPC A61M 16/08 (2013.01) [A61M 16/0003 (2014.02); A61M 16/024 (2017.08); A61M 16/205 (2014.02); A61M 2016/003 (2013.01); A61M 2016/0027 (2013.01); A61M 2205/3368 (2013.01)] 13 Claims
OG exemplary drawing
 
3. A ventilator, comprising:
a flow sensor comprising a temperature element or a flow element;
a pressure sensor;
an exhalation valve;
a processor; and
a memory storing computer executable instructions that when executed by the processor cause the ventilator to perform a set of operations comprising:
receiving, from the flow sensor, a measured exhalation flow of breathing gases;
receiving, from the pressure sensor, a measured pressure;
determining a modeled exhalation flow based on an electrical current provided to an exhalation valve and the measured pressure;
evaluating a flow difference between the modeled exhalation flow and the measured exhalation flow;
identifying a sensor failure of the flow sensor based on the flow difference and; in response to determining the sensor failure, use the modeled exhalation flow, instead of the measured exhalation flow, for controlling operation of the ventilator.