An oxygen delivery conduit for supplying oxygen continuously under pressure (above atmospheric pressure) to a patient wearing a nasal cannula that prevents occlusion or pinching of the oxygen tube sections supplying the oxygen to insure a continuous oxygen supply to the patient. First and second oxygen...http://www.google.se/patents/US5572994?utm_source=gb-gplus-sharePatent US5572994 - Occlusion resistant oxygen supply conduit for a nasal cannula
