title: The McGrath® Series 5 videolaryngoscope vs the Macintosh laryngoscope: a randomised, controlled trial in patients with a simulated difficult airway.
abstract: We compared the McGrath® Series 5 videolaryngoscope with the Macintosh laryngoscope in a simulated difficult airway, using manual in-line stabilisation in 88 anaesthestised patients of ASA physical status 1-2. The primary outcome was laryngoscopic view. Secondary outcomes included rates of successful tracheal intubation and complications. A Cormack and Lehane grade-1 or -2 view was found in all patients when using the McGrath compared with 45 (51%, p < 0.0001) using the Macintosh laryngoscopes. The mean (SD) percentage of glottic opening was 82 (23)% using the McGrath compared with 13 (23)% using the Macintosh (p < 0.0001). In 66 out of 88 patients (75%), the McGrath improved the glottic view by one to three grades compared with the Macintosh (p < 0.001). Intubation of the trachea was successful in all patients using the McGrath, while the Macintosh was successful in 26 (59%, p < 0.001). There was no significant difference in the complication rates between the devices.
authors.affiliation: Department of Anaesthesia,  Dalhousie University, Halifax, NS, Canada.
authors.forename: A M
authors.initials: AM
authors.lastname: Taylor
authors.forename: M
authors.initials: M
authors.lastname: Peck
authors.forename: S
authors.initials: S
authors.lastname: Launcelott
authors.forename: O R
authors.initials: OR
authors.lastname: Hung
authors.forename: J A
authors.initials: JA
authors.lastname: Law
authors.forename: K
authors.initials: K
authors.lastname: MacQuarrie
authors.forename: D
authors.initials: D
authors.lastname: McKeen
authors.forename: R B
authors.initials: RB
authors.lastname: George
authors.forename: J
authors.initials: J
authors.lastname: Ngan
mesh_terms: D000402:Airway Obstruction; D000704:Analysis of Variance; D004867:Equipment Design; D005260:Female; D006801:Humans; D007442:Intubation, Intratracheal / Q000295:instrumentation* / Q000379:methods; D020704:Laryngoscopes; D007828:Laryngoscopy / Q000295:instrumentation* / Q000379:methods; D008297:Male; D008875:Middle Aged; D014741:Video Recording