What word or phrase does your mother always say?
pneumothorax pneu·mo·tho·rax (nōō'mō-thôr'āks', nyōō'-)
Accumulation of air or gas in the pleural cavity, occurring as a result of disease or injury or as a treatment of tuberculosis and other lung diseases.
Accumulation of a gas, such as air, in the space between the pleurae of the lungs and the pleurae lining the chest wall (called the pleural cavity), occurring as a result of disease or injury or induced to collapse the lung in the treatment of tuberculosis and other lung diseases. A large pneumothorax is treated by inserting a syringe or a tube into the pleural cavity to aspirate air, which helps the collapsed lung to expand.