SYSTEMS AND METHODS FOR VENTILATION IN PROPORTION TO PATIENT EFFORT
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Abstract
Various embodiments of the present disclosure provide systems, methods and devices for respiratory support. As one example, a ventilation system is disclosed that includes a computer readable medium including instructions executable by a processor to receive a measured pressure value and a net flow value. A patient effort value is calculated based on a relationship between patient effort, the measured pressure value and the net flow value. The instructions are further executable to calculate a gas delivery metric that varies as a function of the patient effort value. Gas is then caused to be delivered consistent with the gas delivery metric.
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Citations
44 Claims
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1-26. -26. (canceled)
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27. A method for respiratory support, the method comprising:
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identifying a target proportion of patient effort; measuring a pressure and providing a measured pressure; measuring an inlet flow and an outlet flow, and providing a measured net flow; using a relationship between a first value related to the measured pressure, a second value related to the measured net flow and an estimated normalized prediction error, wherein the estimated normalized prediction error is based at least in part on a current estimated value of a parameter vector to calculate an estimate of patient effort from the measured pressure and measured net flow; and supplying a gas in proportion to the estimate of patient effort based on the target proportion. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. A ventilation system, the system comprising:
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a gas inlet; a gas outlet; a tube coupling the gas inlet and the gas outlet; a pressure sensor, wherein the pressure sensor is operable to provide a measured pressure value indicating a pressure in the tube; a first flow sensor, wherein the first flow sensor is operable to provide an inlet flow value indicating a flow associated with the gas inlet; a second flow sensor, wherein the second flow sensor is operable to provide an outlet flow value indicating a flow associated with the gas outlet; and a processor communicably coupled to a computer readable medium, wherein the computer readable medium includes instructions executable by the processor to; identifying a target proportion of patient effort; receive a measured pressure value; receive a net flow value; calculate a patient effort value based on a relationship between patient effort, the measured pressure value, the net flow value, and an estimated normalized prediction error, wherein the estimated normalized prediction error is based at least in part on a current estimated value of a parameter vector; calculate a gas delivery metric that varies as a proportion of the patient effort value, wherein the proportion is the target proportion; determine an inhalation phase based on the patient effort value; and cause a gas to be delivered consistent with the gas delivery metric. - View Dependent Claims (38, 39, 40, 41)
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42. A ventilation system, the ventilation system comprising:
a processor communicably coupled to a computer readable medium, wherein the computer readable medium includes instructions executable by the processor to; receive a measured pressure value; receive a net flow value; calculate a patient effort value based on a relationship between patient effort, the measured pressure value, the net flow value, and an estimated normalized prediction error, wherein the estimated normalized prediction error is based at least in part on a current estimated value of a parameter vector; calculate a volume of gas to be delivered based on a target proportion of the patient effort; and cause a gas to be delivered consistent with the calculated volume of gas. - View Dependent Claims (43, 44)
Specification