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Researchers randomized 88 healthy adults undergoing elective surgery at an academic center in Canada to intubation with a Macintosh laryngoscope or McGrath Series 5 video laryngoscope. Attending anesthesiologists who practiced with the McGrath Series 5 on a manikin until comfortable with its use evaluated glottic visualization using both devices, and intubated the trachea using the second device. Manual cervical spine immobilization was applied to simulate difficult intubation. Laryngeal manipulation maneuvers were not permitted. Patients with reactive airway disease, gastroesophageal reflux, ischemic heart disease, recent stroke or myocardial infarction, or cervical spine instability were excluded.
Baseline characteristics were similar betw…