The present invention describes systems and methods to provide variable flow oxygen therapy. An exemplary embodiment of the present invention provides a method of oxygen therapy involving delivering oxygen-enriched gas to a patient during a first portion of a breathing cycle at a first flow rate. Furthermore,...http://www.google.es/patents/US20110232642?utm_source=gb-gplus-sharePatente US20110232642 - VARIABLE FLOW OXYGEN THERAPY
