title: Preoxygenation in Critically Ill Patients Requiring Intubation: Difficult Questions, No Easy Answers.
authors.affiliation: Department of Anesthesia University of Toronto and University Health Network Toronto General Hospital Toronto, Ontario, Canada matteo.parotto@uhn.ca.
authors.forename: Matteo
authors.initials: M
authors.lastname: Parotto
authors.affiliation: Department of Anesthesia University of Toronto and University Health Network Toronto General Hospital Toronto, Ontario, Canada.
authors.forename: Richard M
authors.initials: RM
authors.lastname: Cooper
mesh_terms: D016638:Critical Illness; D006801:Humans; D007442:Intubation, Intratracheal; D010100:Oxygen
chemical_list: D010100:Oxygen