High frequency oscillator ventilator
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United States of America Patent
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-
Feb 21, 2006
Grant Date -
Jun 21, 2001
app pub date -
Dec 11, 2000
filing date -
Dec 17, 1999
priority date (Note) -
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status (Latency Note)
Importance
Abstract
A high-frequency oscillator ventilator has a first gas conduit with an opening for gas connection with a patient's airways and a bias gas flow inlet and a bias flow outlet disposed to define therebetween a flow path for a bias gas within the first conduit. An oscillator operable to alternately introduce a volume of additional gas from a source into, and to withdraw at least the same volume of gas from, the first gas conduit, thereby inducing pressure oscillations in gas within the first conduit to move gas along a path intersecting the flow path for a bias gas alternately into and out of the opening at a predetermined high-frequency dependent on the output of a control signal generator.
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