Achar, Shreepathi Krishna Apneic Oxygenation during simulated prolonged difficult laryngoscopy: Comparison of nasal prongs versus nasopharyngeal catheter: A prospective randomized controlled study. [electronic resource] - Anesthesia, essays and researches - 63-7 p. digital Publication Type: Journal Article ISSN: 0259-1162 Standard No.: 10.4103/0259-1162.128911 doi