Surgical schema. The endotracheal intubation tube is omitted from this diagram. (1) Upper tip of Weerda-type laryngoscope. (2) Grasping forceps. (3) Rigid nasal sinus surgery endoscope at 70°. (4) Lower tip of Weerda type laryngoscope. (5) Lingual tonsil. (6) Scope of field of view of rigid endoscope. (7) Epiglottis. (8) Retropharyngeal wall. (9) Glottic space. (10) Trachea. (11) Esophagus.