Fig. 1From: Determinants of difficult laryngoscopy based on upper airway indicators: a prospective observational studyTongue width. Transverse view of the tongue with low frequency linear transducer in the coronal position below the patient’s mandible, both sides of the lingual arteries were scanned. The maximum distance between the two lingual arteries was measured, as indicated by the dotted line. GG – Genioglossus muscle, TS – Dorsal tongue surfaceBack to article page