The most common airway abnormality was laryngeal paralysis, seen in 32 patients, followed by subglottic stenosis, which was seen 18 patients. There were 70 congenital lesions and 64 acquired lesions.

• 最常见的气道异常是喉麻痹（见于32名患者），其次是声门下狭窄（见于18名患者）。有70个先天性损伤，64个获得性损伤。