Nasal positive airway pressure mask and method
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United States of America Patent
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Aug 19, 1997
Grant Date -
N/A
app pub date -
Mar 28, 1996
filing date -
Mar 28, 1996
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A nasal positive airway pressure mask is provided having a variable orifice venting aperture member. The variable orifice venting aperture member preferably is mounted to the mask frame, but may be mounted at other locations. The variable orifice vent aperture member expands under increased pressure, e.g., during exhalation, and contracts to its original diameter at lower pressures, e.g., during inhalation, to provide variable venting capacity during positive airway pressure treatment.
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