What does the acronym "COPD" signify?

The acronym "COPD" stands for Chronic Obstructive Pulmonary Disease, which is a progressive lung disease characterized by increasing breathlessness. This condition is mainly caused by long-term exposure to substances that irritate and damage the lungs, most notably cigarette smoke. Individuals with COPD often experience symptoms such as chronic cough, wheezing, and a general decrease in lung function over time.

Understanding the correct definition helps in recognizing the significant impact COPD has on public health, given that it is one of the leading causes of morbidity and mortality worldwide. It also emphasizes the importance of medical gas therapy, as patients may require supplemental oxygen and other treatments to manage their symptoms effectively and improve their quality of life.

The other choices do not represent any recognized medical terminology or conditions relevant to respiratory health or medical practices.