Why non-smokers develop COPD

COPD is a disease with a chronic narrowing of the respiratory tract, occurs predominantly in smokers. Researchers have now found an explanation for exceptions to this rule: In the magazine "JAMA" they describe that the size of the breath could play the way of a role in why non-smokers do suffer from them, while some heavy smokers would be spared.

An analysis of data from three large studies showed that people with smaller breathing developed, due in relation to the lung size is much more likely COPD as a study participant, their respiratory system in relation to the lung were greater. People with COPD who had never smoked, had in relation to the lung size is often small respiratory tract, while heavy smokers without COPD had larger airway than the average. This correlation remained even when other known risk factors for COPD, such as air pollution and Asthma, have been taken into account.

Lung function decreases with age

Dr. Benjamin Smith, a lung specialist at Columbia University in New York City, said: "The results show that small Airways relative to lung size is a strong risk factor for COPD. This helps us to understand why 30 percent of the disease in people who have never smoked." This is because lung function decreases with age, so that people who have a naturally low lung function, develop later may be a COPD, even if they are non-Smoking. Conversely, smokers with greater breath because of probably plenty of breathing reserves, the Smoking-related lung damage to cope with.

Chronic obstructive pulmonary disease COPD causes breathing problems, which can limit the daily activities of a Person. When children grow, they develop in the respiratory tract normally proportional to your lungs. In some people the airway can be expected, however, for unclear reasons, less than or greater than. Why this is so and whether this could affect want to investigate, the scientists now more.

ZOU