Identification of Morphological Characteristics to Predict Difficult Endotracheal Intubation Using a Flexible Fiberscope

"* Characteristics of patients will be assessed before induction of general anesthesia~* Glottic visualization will be evaluated by direct laryngoscopy.~* The endotracheal tube will be loaded onto the scope after silicon spray lubrication~* Intubation will be performed with the flexible fiberscope with the patient in supine position with head and neck in neutral position~* With the tip of the fiberscope in satisfactory position, the endotracheal tube will be advanced into the trachea. The scope will then be removed.~* Accurate positioning of the endotracheal tube will be confirmed by capnography and lung auscultation."