- 1.
Eight cases demonstrating various forms of intra-pulmonary positive pressure phenomena, occurring in infancy and childhood, are presented.
- 2.
Tension developmental cysts and obstructive emphysema due to congenital atresia of a bronchus or bronchioles are not uncommon causes of acute asphyxia during the first few weeks of life.
- 3.
The radiological differentiation between tension cysts, obstructive emphysema and tension pneumothorax is difficult and unreliable.
- 4.
Needling of the chest in these conditions is dangerous.
- 5.
Exploratory thoracotomy and excision of the ballooned segment or lobe may prove a life-saving emergency surgical procedure.