Method and apparatus for substance delivery in system for supplying breathable gas
First Claim
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1. A substance delivery apparatus for supplying a substance to a human or animal, the substance delivery apparatus comprising:
- means for generating a flow of pressurized breathable gas;
means for measuring the pressure of the flow of pressurized breathable gas; and
means for delivering the substance with the flow of pressurized breathable gas to the human or animal only during inhalation, the substance being added to the flow of pressurized breathable gas at a pressure that exceeds the measured pressure of the flow of pressurized breathable gas by a predetermined pressure difference.
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Abstract
A substance delivery apparatus for use with a system for supplying breathable gas to a human or animal includes a sensor to measure the pressure of the supplied breathable gas and to detect inhalation by the human or animal; and a reservoir, a conduit, a pump, and a diaphragm to deliver the substance to the human or animal during inhalation at a pressure higher than the supplied pressure of the breathable gas.
47 Citations
34 Claims
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1. A substance delivery apparatus for supplying a substance to a human or animal, the substance delivery apparatus comprising:
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means for generating a flow of pressurized breathable gas; means for measuring the pressure of the flow of pressurized breathable gas; and means for delivering the substance with the flow of pressurized breathable gas to the human or animal only during inhalation, the substance being added to the flow of pressurized breathable gas at a pressure that exceeds the measured pressure of the flow of pressurized breathable gas by a predetermined pressure difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A substance delivery apparatus for supplying a substance to a human or animal, the substance delivery apparatus comprising:
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a flow generator configured to generate a flow of pressurized breathable gas; a pressure sensor to measure the pressure of the flow of pressurized breathable gas; an air flow sensor adapted to measure a volumetric flow rate of the flow of pressurized breathable gas; a positive displacement pump configured to add the substance to the flow of pressurized breathable gas at a pressure that exceeds the measured pressure of the flow of pressurized breathable gas by a predetermined pressure difference; and a control system configured to operate the positive displacement pump, wherein the substance is added to the flow of pressurized breathable gas only during a volumetric flow rate indicative of inhalation. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A substance delivery apparatus for supplying a substance to a human or animal, the substance delivery apparatus comprising:
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a flow generator configured to generate a flow of pressurized breathable gas; a pressure sensor to measure the pressure of the flow of pressurized breathable gas; an air flow sensor adapted to measure a volumetric flow rate of the flow of pressurized breathable gas; a positive displacement pump configured to add the substance to the flow of pressurized breathable gas at a pressure that exceeds the measured pressure of the flow of pressurized breathable gas by a predetermined pressure difference; and a control system configured to operate the positive displacement pump in an inhalation phase and an exhalation phase so that the positive displacement pump receives the substance during exhalation and adds the substances to the flow of pressurized breathable gas during inhalation. - View Dependent Claims (33, 34)
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Specification