What Is Bronchiectasis?
Bronchiectasis (brong-ke-EK-ta-sis) is a condition
in which damage to the airways causes them to widen and become flabby and
scarred. The airways are tubes that carry air in and out of your lungs.
Bronchiectasis usually is the result of an infection
or other condition that injures the walls of your airways or prevents the
airways from clearing mucus. Mucus is a slimy substance that the airways
produce to help remove inhaled dust, bacteria, and other small particles.
In bronchiectasis, your airways slowly lose their
ability to clear out mucus. When mucus can't be cleared, it builds up and
creates an environment in which bacteria can grow. This leads to repeated,
serious lung infections.
Each infection causes more damage to your airways.
Over time, the airways lose their ability to move air in and out. This can
prevent enough oxygen from reaching your vital organs.
Bronchiectasis can lead to serious health problems,
such as respiratory failure, atelectasis (at-eh-LEK-tah-sis), and
heart
failure.
Bronchiectasis
Figure A shows a cross-section of
the lungs with normal airways and with widened airways. Figure B shows a
cross-section of a normal airway. Figure C shows a cross-section of an airway
with bronchiectasis.
Overview
Bronchiectasis can affect just one section of one of
your lungs or many sections of both lungs.
The initial lung damage that leads to bronchiectasis
often begins in childhood. However, symptoms may not appear until months or
even years after you start having repeated lung infections.
In the United States, common childhood infections,
such as whooping cough and measles, used to cause many cases of bronchiectasis.
However, these causes are now less common due to the use of vaccines and
antibiotics.
Now, in the United States, bronchiectasis usually is
due to an underlying medical condition that injures the airway walls or
prevents the airways from clearing mucus. Examples of such conditions include
cystic
fibrosis and primary ciliary dyskinesia (SIL-e-ar-e dis-ki-NE-ze-ah).
Bronchiectasis that occurs in only one part of the
lung may be due to a blockage rather than an underlying condition.
Bronchiectasis can be congenital or acquired.
Congenital bronchiectasis usually affects infants and children. It's the result
of a problem with how the lungs form in a fetus.
Acquired bronchiectasis occurs as a result of
another medical condition. It can affect adults and older children. This type
of bronchiectasis is more common than the congenital type.
Outlook
Bronchiectasis can't be cured. However, with proper
care, most people who have it can enjoy a good quality of life.
Early diagnosis and treatment of bronchiectasis are
important. The sooner your doctor can start treating your bronchiectasis and
any underlying conditions, the better the chances of preventing further damage
to your lungs.
Revised May 2009
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