Indirect Laryngoscopy and Ultrasonography in Prediction of Difficult Airway

"Ultrasonographic upper airway measurements: Epiglottis-skin distance, Hyoid bone-skin distance, Anterior commissure-skin distance and Thickness of tounge root.~Indirect Laryngoscopy: Grading of laryngoscopic view (I=Visible anterior commissure and vocal cords, II= visible posterior part of vocal cords and posterior commissure, III= Visible posterior commissure and epiglottis, IV= Visible only epiglottis tip and posterior pharyngeal wall)"