What does the acronym "COPD" stand for?

The acronym "COPD" stands for Chronic Obstructive Pulmonary Disease. This term describes a group of progressive lung diseases that primarily include emphysema and chronic bronchitis. These conditions cause airflow limitation and breathing difficulties due to the obstruction of airflow from the lungs, which is a defining characteristic of the disease. Understanding COPD is essential in medical practice, particularly when discussing treatment options, management strategies, and the importance of oxygen therapy for patients with this condition.

The other options do not accurately represent this medical condition, thus highlighting the importance of precise terminology in the healthcare field.