The chief traumatic factors in chronic laryngeal stenosis

are: (a) prolonged presence of a foreign body in the larynx (b)

unskilled attempts at intubation and the wearing of poorly fitting

intubation tubes; (c) a faulty tracheotomy; (d) a badly fitting

cannula; (e) war injuries; (f) attempted suicide; (g) attempted

homicide; (h) neglect of cleanliness and care of either intubation

tubes or tracheotomic cannulae allowing incrustation and roughening

which traumatize the tissues at each movement of the ever-moving

larynx and trachea.

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