What Is the Primary Cause of COPD

Mr. Santos, a 65-year-old Male Patient, Is Admitted to the Medical-surgical Unit with a Diagnosis of Chronic Obstructive Pulmonary Disease (COPD) . He Has a History of Smoking for 40 Years. Mr. Santos Is Experiencing Increased Shortness of Breath, Productive Cough with Yellowish Sputum and Wheezing