The Miller blade is a straight laryngoscope blade designed to directly lift the epiglottis to expose the glottic opening. In contrast, the Macintosh blade is a curved blade that is advanced into the vallecula (the space between the base of the tongue and the epiglottis) and indirectly lifts the epiglottis by stretching the hyoepiglottic ligament. The McCoy blade has a hinged tip for lifting, and the GlideScope is a video laryngoscope.
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