Apparatus and method for providing high frequency variable pressure to a patient
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United States of America Patent
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Mar 23, 2004
Grant Date -
N/A
app pub date -
Aug 31, 2000
filing date -
Sep 3, 1999
priority date (Note) -
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status (Latency Note)
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Abstract
A high frequency pressure oscillation device and method of providing high frequency pressure oscillations to a patient. The device includes a patient circuit coupling a gas source to an airway of a patient, and a valve disposed in the patient circuit. The valve communicates the gas source with the patient's airway when in a first position and at least partially restricts communication when in a second position. A rotating drive assembly rotates the valve in a first direction such that the valve is alternatively disposed in the first and second positions. This system is capable of delivering positive and negative pressures to the airway of a patient by including a blower as the source of breathing gas. This system is also capable of superimposing a high frequency oscillating pressure signal on another pressure signal by adding a second blower in series with the first blower.
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