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US 10,207,068 B2Granted
Methods and systems for leak estimation
AssigneeCovidien LP
InventorsMehdi M. Jafari, Periagounder R. Arul, Jeffrey K. Aviano
Life of this patent
Estimating the term…
Abstract
The systems and methods include providing, displaying, and/or utilizing leak estimation during ventilation of a patient with a ventilator. The systems and methods include providing, displaying, and/or utilizing internal leak estimation, total leak estimation, and/or external leak estimation during ventilation of a patient with a ventilator.
Claims11
A ventilator system comprising:
- a pressure generating system that generates a flow of breathing gas;
- a ventilation tubing system including a patient interface for connecting the pressure generating system to a patient;
- sensors operatively coupled to the ventilation tubing system, the sensors include a proximal sensor and at least one of an inspiratory sensor or an expiratory sensor, wherein the sensors generate output indicative of at least one of flow and pressure;
- an internal leak module that estimates an internal leak flow by modeling internal leakage as a first internal leakage component through a first internal orifice of fixed size and a second internal leakage component through a second internal orifice of varying size using sensor output from at least the proximal sensor;
- and
- a total leak module that estimates total leak flow by modeling total leakage as a first total leakage component in the ventilation tubing system through a first circuit orifice of fixed size and a second total leakage component through a second circuit orifice of varying size using at least the output from at least one of the inspiratory sensor or the expiratory sensor.
3 more elements
A ventilator system comprising:
- a pressure generating system that generates a flow of breathing gas;
- a ventilation tubing system including a patient interface for connecting the pressure generating system to a patient;
- sensors operatively coupled to the ventilation tubing system, the sensors include a proximal sensor and at least one of an inspiratory sensor or an expiratory sensor, wherein the sensors generate output indicative of at least one of flow and pressure;
- and
- a controller that estimates an internal leak flow by modeling internal leakage as a first internal leakage component through a first internal orifice of fixed size and a second internal leakage component through a second internal orifice of varying size using sensor output from at least the proximal sensor and estimates total leak flow by modeling total leakage as a first total leakage component in the ventilation tubing system through a first circuit orifice of fixed size and a second total leakage component through a second circuit orifice of varying size using at least the output from at least one of the inspiratory sensor or the expiratory sensor.
2 more elements
Dependencies are inferred from the claim text.