Tracheoesophageal Fistula Abnormal connection between esophagus and trachea due to improper division by the tracheoesophageal septum most common defect is blind upper esophagus with lower esophagus connected to trachea food passes into lungs causing cyanosis, choking and vomiting food causes pneumonitis air passes into stomach showing air bubbles on a chest x-ray due to blind esophagus, NG tubes cannot be passed into stomach Types of Tracheoesophageal Fistula