Systems and methods for ventilation in proportion to patient effort
First Claim
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1. A 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; and
calculate a gas delivery metric, wherein the gas delivery metric varies as a function of the patient effort value; and
cause a gas to be delivered consistent with the gas delivery metric.
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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.
705 Citations
36 Claims
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1. A 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; and calculate a gas delivery metric, wherein the gas delivery metric varies as a function of the patient effort value; and cause a gas to be delivered consistent with the gas delivery metric. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for respiratory support, the method comprising:
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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. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. 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; 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 first function of the patient effort value; determine an inhalation phase based on the patient effort value; and cause a gas to be delivered consistent with the gas delivery metric.
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27. A method for respiratory support, the method comprising:
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measuring a pressure associated with a patient circuit connected to a patient and providing a measured pressure; measuring an inlet flow and an outlet flow associated with the patient circuit, and providing a measured net flow; calculating a patient effort value based on the measured pressure and the 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 patient effort, 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; and delivering a volume of respiratory gas over a period of time to the patient through the patient circuit based on the patient effort. - View Dependent Claims (28, 29, 30, 31, 32)
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33. 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 the patient effort; and cause a gas to be delivered consistent with the calculated volume of gas. - View Dependent Claims (34, 35, 36)
Specification