Administration of CPAP treatment pressure in presence of APNEA
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United States of America Patent
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Apr 9, 2002
Grant Date -
N/A
app pub date -
Jan 19, 1998
filing date -
Nov 7, 1997
priority date (Note) -
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status (Latency Note)
Importance
Abstract
CPAP treatment apparatus having a controllable flow generator operable to produce breathable gas at a treatment pressure elevated above atmosphere to a patient by a delivery tube coupled to a mask having a connection with a patient's airway. A sensor generates a signal representative of patient respiratory flow that is provided to a controller. The controller is operable to determine the occurrence of an apnea from a reduction in respiratory airflow below a threshold, and if an apnea has occurred, to determine the duration of the apnea and to cause the flow generator to increase the treatment pressure by an amount which is an increasing function of the duration of the apnea, and a decreasing function of the treatment pressure immediately before the apnea.
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