Ventilator Respiratory Variable-Sized Gas Accumulator
First Claim
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1. A medical ventilator system, comprising:
- a processor;
a plurality of sources of different gases controlled by the processor;
a gas manifold connected to an outlet to a patient circuit via a flow path, the gas manifold receiving gas from the plurality of gas sources forming a gas mixture;
an accumulator with a plurality of chambers, the accumulator is adapted to receive the gas mixture from the gas manifold;
at least one purge valve in at least one chamber of the accumulator other than a first chamber controlled by the processor, the at least one purge valve is adapted to control a release of the gas mixture from the at least one chamber other than the first chamber of the accumulator to an environment external to the patient circuit; and
at least one valve controlled by the processor, the at least one valve is adapted to change a volume of the accumulator by controlling at least one chamber flow path between the plurality of chambers of the accumulator.
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Abstract
This disclosure describes systems and methods for ventilating a patient with a system that includes an accumulator for storing a gas mixture. The disclosure further describes a novel approach for a fast delivery of a change in gas mixture to a patient by utilizing a variable-sized accumulator.
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Citations
20 Claims
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1. A medical ventilator system, comprising:
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a processor; a plurality of sources of different gases controlled by the processor; a gas manifold connected to an outlet to a patient circuit via a flow path, the gas manifold receiving gas from the plurality of gas sources forming a gas mixture; an accumulator with a plurality of chambers, the accumulator is adapted to receive the gas mixture from the gas manifold; at least one purge valve in at least one chamber of the accumulator other than a first chamber controlled by the processor, the at least one purge valve is adapted to control a release of the gas mixture from the at least one chamber other than the first chamber of the accumulator to an environment external to the patient circuit; and at least one valve controlled by the processor, the at least one valve is adapted to change a volume of the accumulator by controlling at least one chamber flow path between the plurality of chambers of the accumulator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A pressure support system comprising:
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a processor; a pressure generating system adapted to generate a flow of breathing gas controlled by the processor; a ventilation system including a patient circuit controlled by the processor; a plurality of sources of different gases controlled by the processor; a gas manifold connected to an outlet to a patient circuit via a flow path, the gas manifold receiving gas from the plurality of gas sources forming a gas mixture; an accumulator with a plurality of chambers, the accumulator is adapted to receive the gas mixture from the gas manifold; at least one purge valve in at least one chamber of the accumulator, other than a first chamber, controlled by the processor, the at least one purge valve is adapted to control a release of the gas mixture from the at least one chamber, other than the first chamber, of the accumulator to an environment external to the patient circuit; and at least one valve controlled by the processor, the at least one valve is adapted to change a volume of the accumulator by controlling at least one chamber flow path between the plurality of chambers of the accumulator.
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14. A method for ventilating a patient, the method comprising:
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controlling a change in gas mixture; measuring a gas flow rate in a patient circuit; measuring a pressure in a first chamber of an accumulator system with a plurality of chambers; closing a first valve to close a flow connection between the first chamber and a second chamber of the accumulator system to reduce a volume of the accumulator system; controlling a release of a second gas mixture from the second chamber of the accumulator system to an environment external to the patient circuit by controlling a first purge valve in the second chamber of the accumulator system; and controlling a pressure of the accumulator system by controlling the gas flow rate, wherein the pressure and the volume of the accumulator system are controlled based on at least one of the change in gas mixture, the measured gas flow rate, and the measured pressure of the accumulator system during ventilation of a patient. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification