患此行气管成形术后不能拔除气管切开术导管的因素很多，常见原因为仍存在着静止的或动态的气道阻塞因素。前者如气管粘膜硬变、肉芽组织增生、气道扩张不足、气管造口前壁塌陷、术后再狭窄等；后者如气管壁硬度不够，吸气时负压使管壁塌陷。尤应注意下列问题：①气管造口术疫 There are many factors that prevent tracheotomy catheters from being removed after tracheoplasty. Common causes are still static or dynamic airway obstruction. The former, such as tracheal mucosal cirrhosis, granulation tissue hyperplasia, inadequate airway dilatation, tracheostomy anterior wall collapse, postoperative restenosis; the latter, such as the tracheal wall hardness is not enough, suction negative pressure to collapse the tube wall. In particular, should pay attention to the following questions: ① tracheostomy epidemic