The present invention relates generally to apparatus and methods used in trans-tracheal oxygen therapy to permit a micro-tracheal catheter to be inserted into the throat, so that breathing efficiency may be enhanced through the introduction of oxygen directly into the patient's lungs. More particularly,...http://www.google.com.au/patents/US5230332?utm_source=gb-gplus-sharePatent US5230332 - Methods and apparatus for a micro-tracheal catheter hub assembly
