Chronic Obstructive Pulmonary Disease ( Copd ) Essay
The report is about chronic obstructive pulmonary disease (COPD), which is one of the most important topics in medicine and affect large number of people over the world.
Chronic obstructive pulmonary disease (COPD) has been known to mankind for over 200 year. The disease was initially recognized with the use of the stethoscope and spirometer and spirometry still remains the most effective means of identification and assessment of the course of COPD and responses to therapy .COPD is the fourth most common cause of death in the USA. Approximately 16 million adult Americans have COPD. It is on the rise as one of the top five killer diseases. By 2020 COPD is expected to become the third most common cause of death .Over years of study it has emerged that COPD refers to airways obstruction over the long term and COPD includes: chronic bronchitis , emphysema and chronic asthmatic bronchitis .
Chronic obstructive pulmonary disease (COPD) also known as chronic obstructive lung disease (COLD) and chronic obstructive airway disease (COAD), among others, is a type of obstructive lung disease characterized by chronically poor airflow. It typically worsens over time. 
Signs and symptoms
The most common symptoms of COPD are sputum production, shortness of breath, and a productive cough.
An acute exacerbation of COPD is defined as increased shortness of breath, increased sputum production, a change in the color of the sputum from clear to…