1. American Society of Anesthesiologists Task Force on Difficult Airway Management. Practice guidelines for management of the difficult airway;Caplan;an updated report by the american society of anesthesiologists task force on management of the difficult airway,2003
2. Emergency flexible fiberoptic nasotracheal intubation, a report of 60 cases;Delaney;Ann Emerg Med,1988
3. Development, characterization and initial assessment of capnography guided intubation;Atlas;Can J Anaesth,2004
4. Awake fibrecapnic intubation;Huitink;a novel technique for intubation in head and neck cancer patients with a difficult airway,2006
5. Blind nasal intubation with audiocapnometry;Omoiqui;Anesth Analg,1991