A collapsed lung occurs when air escapes from the lung. The air then fills the space outside of the lung, between the lung and chest wall. This buildup of air puts pressure on the lung, so it cannot expand as much as it normally does when you take a breath.
The medical name of this condition is pneumothorax.
Collapsed lung can be caused by an injury to the lung. Injuries can include gunshot or knife wound to the chest, rib fracture, or certain medical procedures.
In some cases, a collapsed lung is caused by air blisters (blebs) that break open, sending air into the space around the lung.This can result from air pressure changes such as when scuba diving or traveling to a high altitude.
Tall, thin people and smokers are more likely to have a collapsed lung.
Lung diseases can also increase the chance of getting a collapsed lung. These include:
In some cases, a collapsed lung occurs without any cause. This is called a spontaneous pneumothroax or collapsed lung.
Common symptoms of a collapsed lung include:
A larger pneumothorax causes more severe symptoms, including:
The health care provider will listen to your breathing with a stethoscope. If you have a collapsed lung, there are decreased or no breath sounds on the affected side. You may also have low blood pressure.
Tests that may be ordered include:
A small pneumothorax may go away on its own. You may only need oxygen treatment and rest.
The health care provider may use a needle to pull the extra air out from around the lung so it can expand more fully. You may be allowed to go home if you live near the hospital.
If you have a large pneumothorax, a chest tube will be placed between the ribs into the space around the lungs to help drain the air and allow the lung to re-expand. The chest tube can be left in place for several days. You may need to stay in the hospital. If a small chest tube or flutter valve is used, you may be able to go home. You will need to return to the hospital to have the tube or valve removed.
Some patients with a collapsed lung need extra oxygen.
Lung surgery may be needed to treat collapsed lung or to prevent future episodes. The area where the leak occurred may be repaired. Sometimes, a special chemical is placed into the area of the collapsed lung. This chemical causes a scar to form. This procedure is called pleurodesis.
If you have a collapsed lung, you are more likely to have another one in the future if you:
How well you do after having a collapsed lung depends on what caused it.
Call your health care provider if you have symptoms of a collapsed lung, especially if you have had one before.
There is no known way to prevent a collapsed lung. You can decrease your risk by not smoking.
Air around the lung; Air outside the lung; Pneumothorax; Spontaneous pneumothorax
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Kirsch TD, Sax J. Tube thoracostomy. In: Roberts JR, Hedges JR, eds. Roberts & Hedges’ Clinical Procedures in Emergency Medicine. 6th ed. Philadelphia, Pa: Elsevier Saunders; 2013:chap 10.
Light RW, Lee GY. Pneumothorax, chylothorax, hemothorax, and fibrothorax. In: Mason RJ, Murray JF, Broaddus VC, et al., eds. Murray and Nadel’s Textbook of Respiratory Medicine. 5th ed. Philadelphia, Pa: Elsevier Saunders; 2010:chap 74.
Updated by: Jacob L. Heller, MD, MHA, Emergency Medicine, Virginia Mason Medical Center, Seattle, Washington. Editorial update 01-31-2014. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team
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