title: The authors reply.
authors.affiliation: Department of Anaesthesia, Critical Care and Pain Medicine, Royal Infirmary of Edinburgh, Edinburgh, United Kingdom.
authors.forename: Thalia
authors.initials: T
authors.lastname: Monro-Somerville
authors.forename: Michael A
authors.initials: MA
authors.lastname: Gillies
mesh_terms: D000072601:Cannula; D006801:Humans; D007442:Intubation, Intratracheal; D010100:Oxygen; D010102:Oxygen Inhalation Therapy; D012131:Respiratory Insufficiency
chemical_list: D010100:Oxygen