The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 22, 2003
Filed:
Jan. 23, 2001
Johan Bennarsten, Gustavsberg, SE;
Siemens Elema AB, Solna, SE;
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.