Patent ID: 11896767
Assignee: COVIDIEN LP
Field: Medical technology (Instruments)
Classification: CPC A  G | IPC A  G

Claim 2:
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.