Deeper Intubation Make Effects on Cervical Esophageal ESD

After general anesthesia, endotracheal intubation was conducted using an ultrafine endoscope (GIF-XP260NS, Olympus Corp., Japan), which allows observation of the exact position and avoids blindness caused by laryngoscopy. To prevent balloon compression of the CE after inflating, the endotracheal intubation tube was inserted above the tracheal carina, roughly the upper thoracic esophagus.