CHRONIC ABSTRUCTIVE PULMONARY DISEASE (COPD) Definition: COPD is defined as "a disease state characterized by airflow limitation that is not fully reversible and this airflow limitation is progressive associated with abnormal inflammatory response to the noxious or gaseous particles. According to Davidson , COPD is defined as " COPD is preventable and treatable disease characterized by airflow limitation that is usually progressive and is associated with enhanced chronic inflammatory response in the airways and lungs to the noxious particles. According to National Institute for Health and Clinical Excellence (NICE) , COPD is defined as "Airflow obstruction with reduced FEV1/FEVc is less than 0.7, if FEV1 is greater than or equal to80%; so, diagnosis of COPD should be made on the presence of symptoms". Signs and Symptoms: Shortness of breathing Cough Pink puffers and Blue Blotters or Smokers Cough (classical signs of COPD). *Pink puffer is the major sign of emphyse