Fig. 3From: Determinants of difficult laryngoscopy based on upper airway indicators: a prospective observational studyEpiglottis depth and Epiglottis Anterior Area. Transverse view of the epiglottis with high frequency linear transducer over the thyrohyoid area. Epiglottis depth was measured from the midline of the epiglottis to the skin surface, as indicated by the dotted line. Epiglottis Anterior Area was measured, as shown in the graph. PES - Pre-epiglottic spaceBack to article page