High-frequency oscillator ventilator
First Claim
1. A high-frequency oscillator ventilator comprising:
- a gas conduit having an opening adapted for gaseous connection with airways of a patient, and having a bias gas flow inlet, adapted for connection to a source of bias gas, and a bias gas flow outlet disposed relative to said bias gas flow inlet to define a bias gas flow path within said gas conduit in which a bias gas flow flows, causing removal of an amount of gas from said gas conduit;
an oscillator operably connected to said conduit for generating alternating overpressure and underpressure pulses to induce pressure oscillations in gas within said conduit and move a volume of gas along a respiration flow path, intersecting said bias gas flow path, in alternation into and out of said opening at a predetermined high-frequency, thereby producing an inspiration phase and an expiration phase of a breathing cycle; and
an extraction device operably connected to said conduit during said breathing cycle to withdraw gas from said respiration flow path in a timed relationship with said pressure oscillations and in addition to said amount of gas removal by said bias gas flow.
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Accused Products
Abstract
A high-frequency oscillator (HFO) ventilator has a gas conduit with an opening for gas connection with a patient'"'"'s airways and a bias gas flow inlet and outlet disposed to define therebetween a bias gas flow-path within the conduit. An oscillator is operable to induce pressure oscillations in gas within the conduit to move a volume of gas (“tidal volume”) along a respiration flow-path, intersecting the bias gas flow-path, alternately in to and out of the opening at a predetermined high-frequency to provide, respectively, an inspiration phase and an expiration phase of a breathing cycle. The HFO ventilator further has an extraction device operable during the breathing cycle, and preferably in timed relation with the operation of the oscillator, to withdraw an additional amount of gas from the respiration flow-path.
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Citations
7 Claims
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1. A high-frequency oscillator ventilator comprising:
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a gas conduit having an opening adapted for gaseous connection with airways of a patient, and having a bias gas flow inlet, adapted for connection to a source of bias gas, and a bias gas flow outlet disposed relative to said bias gas flow inlet to define a bias gas flow path within said gas conduit in which a bias gas flow flows, causing removal of an amount of gas from said gas conduit;
an oscillator operably connected to said conduit for generating alternating overpressure and underpressure pulses to induce pressure oscillations in gas within said conduit and move a volume of gas along a respiration flow path, intersecting said bias gas flow path, in alternation into and out of said opening at a predetermined high-frequency, thereby producing an inspiration phase and an expiration phase of a breathing cycle; and
an extraction device operably connected to said conduit during said breathing cycle to withdraw gas from said respiration flow path in a timed relationship with said pressure oscillations and in addition to said amount of gas removal by said bias gas flow. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification