Control of the administration of continuous positive airway pressure treatment
First Claim
1. A CPAP flow generator comprising:
- a blower for providing a supply of pressurised air or breathable gas; and
a controller having control over the blower to supply an inspiratory phase pressure and an expiratory phase pressure, the controller being programmed to set a first flow threshold and a second flow threshold, the controller further sensing flow due to a patient respiration and at least one of
1) selectively triggering generation of a first continuous pressure at a level intermediate of the inspiratory phase and expiratory phase pressures for a period of time as a transitional state upon the first flow threshold being crossed, and
2) selectively triggering generation of a second continuous pressure at a level intermediate of the expiratory phase and the inspiratory phase pressures for a period of time as a transitional state upon the second flow threshold being crossed.
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Accused Products
Abstract
A CPAP treatment apparatus has a patient mask is coupled to an air delivery conduit. The air delivery conduit is coupled to an impeller and motor, collectively forming a blower arrangement for providing a positive pressure of air to the conduit. A controller receives a signal representing respiratory flow. The controller is operable to cause the blower to supply an inspiratory phase pressure and an expiratory phase pressure. The controller selectively triggers generation of a pressure intermediate of the inspiratory phase and expiratory phase pressures for a period of time as a transitional state upon the first flow threshold being crossed. The controller also selectively triggers generation of a pressure intermediate of the expiratory phase and inspiratory phase pressures for a period of time as a transitional state upon the second flow threshold being crossed.
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Citations
21 Claims
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1. A CPAP flow generator comprising:
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a blower for providing a supply of pressurised air or breathable gas; and
a controller having control over the blower to supply an inspiratory phase pressure and an expiratory phase pressure, the controller being programmed to set a first flow threshold and a second flow threshold, the controller further sensing flow due to a patient respiration and at least one of
1) selectively triggering generation of a first continuous pressure at a level intermediate of the inspiratory phase and expiratory phase pressures for a period of time as a transitional state upon the first flow threshold being crossed, and
2) selectively triggering generation of a second continuous pressure at a level intermediate of the expiratory phase and the inspiratory phase pressures for a period of time as a transitional state upon the second flow threshold being crossed.- View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A CPAP treatment apparatus comprising:
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a patient mask coupled to an air delivery conduit;
a blower for providing a supply of pressurised air or breathable gas to said patient mask via said air delivery conduit; and
a controller having control over the blower to supply an inspiratory phase pressure and an expiratory phase pressure, and programmed to set a first flow threshold marking transitions between the inspiratory phase pressure and the expiratory phase pressure, and to set a second flow threshold, the controller further sensing flow due to a patient respiration and at least one of
1) selectively triggering generation of a continuous pressure at a level intermediate of the inspiratory phase and expiratory phase pressures for a period of time as a transitional state upon the first flow threshold being crossed, and
2) selectively triggering generation of another continuous pressure at a level intermediate of the expiratory phase and the inspiratory phase pressures for a period of time as a transitional state upon the second flow threshold being crossed.- View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for the administration of CPAP treatment comprising:
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providing a source of pressured air or breathable gas to a patient;
controlling the pressure of the pressured air or breathable gas between an inspiratory phase level and a lower expiratory phase level;
setting a first patient respiratory flow threshold;
setting a second patient respiratory flow threshold; and
at least one of
1) selectively generating a continuous intermediate pressure for a period of time as a transitional state upon the first patient respiratory flow threshold being crossed; and
2) selectively generating another continuous intermediate pressure for a period of time as a transitional state upon the second patient respiratory flow threshold being crossed.- View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification