Such subglottic ulcers are produced with prolonged endotracheal intubation in which the cuff of the endotracheal tube fi这样的声门下溃疡是可由长期的气管内插管造成的，往往见于插管过紧。
Therapeutic operations were indicated for 25 abnormal findings, which included severe laryngomalacia, subglottic or trac这些异常包括严重的软喉症、声门下或气管狭窄、声门以上的肿瘤等。