Chronic obstructive pulmonary Disease
It is Respiratory disrder in which there is chronic, partial or complete obstuction to the airflow at any level from trachea to the smallest airways resulting in functional disability of the lungs.It consists of following 4 entities.
1)Chronic Bronchitis
2)Emphysema
3)Bronchial Asthma
4)Bronchiectasis
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