Control of the administration of continuous positive airway pressure treatment
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United States of America Patent
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Feb 12, 2002
Grant Date -
N/A
app pub date -
May 25, 1999
filing date -
May 25, 1998
priority date (Note) -
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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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