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| What is Chronic Bronchitis? The bronchi are air passages connecting the windpipe (trachea) with the sacs of the lung (alveoli) where oxygen is taken up by the blood. Bronchitis is an inflammation of the bronchi causing excessive mucous production and swelling of the bronchial walls. Many people suffer a brief attack of acute bronchitis with fever, coughing and spitting when they have a severe cold. Chronic bronchitis, however, is the term applied when this coughing and spitting continue for months and return each year, generally lasting slightly longer each time. Undue breathlessness on exertion is eventually noticed, due to obstruction to air flow in the air passages caused by swelling of the bronchial wall and the presence of mucus that cannot be cleared. |
What Causes Chronic Bronchitis?
Cigarette smoking is the most important cause of chronic bronchitis which rarely occurs in the non-smoker. Environmental pollution may contribute to the development of chronic bronchitis. Some smokers are resistant to the development of chronic bronchitis, but as yet there is no way of predicting which smokers will not develop chronic bronchitis. The decreased incidence of chronic bronchitis among women probably reflects the difference in smoking habits between the sexes. As these differences have diminished we are seeing an increasing incidence of chronic bronchitis in women.
Chest infections seem to occur more frequently in patients with chronic bronchitis. Inhaled tobacco products impair the ability of the lungs to combat infections. The excessive mucus associated with chronic bronchitis is ideal for bacteria to breed.
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