After segmental resection and reanastomosis of the trachea, the tension on the cartilaginous rings of the trachea must be greater than before resection; and the severance of the nerve endings has a corresponding effect on the physiological and pathological reflexes of the trachea. The results are not reported in the literature. No domestic reports of trachelectomy in adolescents have been seen, and foreign reports on the subject have not addressed the syndrome of large airway obstruction. Several cases of high postoperative dyspnea have been reported recently, which in the past were envisaged as a “threaded tube phenomenon”. In fact, it was thought that this was not entirely appropriate at the time. Because the trachea is not a threaded tube, it is a semi-annular cartilage with no cartilage support in the membrane-like portion behind. A recent tracheoscopic observation of a patient during resuscitation made us think that it would be more appropriate to name it as large airway obstruction syndrome. Patient Wang X, male, 16 years old. He was tracheotomized for brainstem hemorrhage due to traumatic brain injury and later developed tracheal stenosis, which prevented removal of the tracheal intubation.