Chronic Obstructive Pulmonary Disease (COPD) is a term used to describe chronic lung disease with progressive and irreversible airflow limitation such as chronic bronchitis and emphysema (Farrell & Dempsey, 2014). COPD is an incurable disease which generally shows decline over a period of years, but acute exacerbations can increase the disease progress and the variability amongst patients makes the disease extremely unpredictable and difficult to diagnose (Leyshon, 2012). The…
