What happens when premature babies have immature lungs?

In general, premature infants can be divided into two types of lung immaturity: acute and sequelae. For acute lung immaturity, if not actively treated, the alveoli will not be able to carry out effective gas oxygen exchange, which may cause breathing difficulties and respiratory distress. In addition, with age, the airway barrier will be poor, which will cause repeated episodes of bronchitis and bronchopneumonia.