喉——气管狭窄的类型有三:1.腔内狭窄:由于炎性内芽组织增生,损坏了气管粘膜上皮,结合水肿、出血,逐步发展成坚硬的纤维组织。2.气管软化:气管软骨受纤维组织增生的影响,逐渐破坏、软化、甚至软骨消失,气管壁没有硬度,吸气时,气管壁下陷,引起气道阻塞。3.声带固定:或为喉返神经损伤,或为环披裂关节固定,声带于吸气时不能张开。 Throat - There are three types of tracheal stenosis: 1. Cavity stenosis: due to inflammatory endometrial proliferation, damage to the tracheal epithelium, combined with edema, bleeding, and gradually developed into hard fibrous tissue. 2. Tracheal softening: Tracheal cartilage affected by fibrosis, and gradually destroyed, softened, or even cartilage disappeared, the tracheal wall without hardness, inhalation, tracheal wall subsidence, causing airway obstruction. 3. Vocal cord fixation: or for the recurrent laryngeal nerve injury, or for the perforation of the ring fixed vocal cord can not be opened when breathing.