长期气管内插管、气道干燥和吸引管的外伤可致下气管的急性阻塞性损害，婴儿因气道口径小和微弱的内科情况而特别危险。该文介绍病危婴儿的四个气道阻塞治疗中的难题。难题之一：高频喷射通气（HFJV）中的气道阻塞。病儿是一妊娠28周，重12509的早产儿，并发衣胞破裂，接?.. Long-term endotracheal intubation, airway dryness, and trauma to aspiration tubes can cause acute obstructive damage to the trachea, which is particularly dangerous due to small, weak airways and weak medical conditions. This article describes the challenges of obstructive treatment of the four airways in critically ill infants. One of the problems: airway obstruction in high frequency jet ventilation (HFJV). Sick child is a 28-week gestation, weighing 12,509 premature children, complicated with rupture of clothing, then?