[Tracheal obstruction caused by bucking during general anesthesia in a patient with a mediastinal tumor].

An eleven-year-old girl underwent an open biopsy of a mediastinal tumor extending from the foreneck to the tracheal carina under general anesthesia. Immediately following the bucking developed at the end of the surgery, she fell into serious ventilatory difficulty. A bronchoscopic examination revealed that the tracheal membrane had protruded into the tracheal lumen by its contraction concurring with the bucking, resulting in the obstruction of the endotracheal tube outlet. Endotracheal anesthesia might accompany tracheal stenosis by bucking, particularly in patients with a tumor surrounding the trachea.