Patent ID: 6595213
Filing Date: 2003-07-22
Classification: A61M

Abstract:
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.