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Direct versus indirect epiglottis elevation during McGrath MAC videolaryngoscopy: a randomized trial of glottic visualization and the hemodynamic response

Videolaryngoscopy is widely used for tracheal intubation. With Macintosh-geometry videolaryngoscopes such as the McGrath MAC, the epiglottis can be elevated indirectly by placing the blade tip in the vallecula, or directly by advancing it beneath the epiglottis. Their relative ef...