Collapsed Lung


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Definition

A collapsed lung, or pneumothorax, is the collection of air in the space around the lungs. This buildup of air puts pressure on the lung, so it cannot expand as much as it normally does when you take a breath.


Alternative Names

Air around the lung; Air outside the lung; Pneumothorax; Spontaneous pneumothorax


Causes, incidence, and risk factors

A collapsed lung occurs when air escapes from the lung and fills up the space outside of the lung, inside the chest. It may be caused by a gunshot or knife wound to the chest, rib fracture, or certain medical procedures.

In some cases, a collapsed lung occurs without any cause. This is called a spontaneous pneumothorax. A small area in the lung that is filled with air, called a bleb, can rupture, sending air into the space around the lung.

Tall, thin people are more likely to have a collapsed lung.

Lung diseases such as COPD, asthma, cystic fibrosis, tuberculosis, and whooping cough also increase your risk for a collapsed lung.


References

Light RW, Lee GY. Pneumothorax, Chylothorax, Hemothorax, and Fibrothorax. In: Mason RJ, Murray JF, Broaddus VC, Nadel JA, eds. Textbook of Respiratory Medicine. 4th ed. Philadelphia, Pa: Saunders Elsevier; 2005: chap 69.


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Review Date: 9/15/2011
Reviewed By: Andrew Schriber, MD, FCCP, Specialist in Pulmonary, Critical Care, and Sleep Medicine, Virtua Memorial Hospital, Mount Holly, New Jersey. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.
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Last Updated 11/1/2011
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