Canadian Practical Nurse Registration Examination (CPNRE) Practice Exam

Pneumothorax is defined as a collapse of the lung due to air accumulation in the pleural space. This condition occurs when air leaks into the space between the lung and the chest wall, which can cause the lung to collapse. The pleural space is normally filled with a small amount of fluid that helps the lung expand and contract with breathing. When air enters this space, it disrupts the pressure balance, preventing the lung from fully expanding. As a result, the affected lung can become less effective at gas exchange, potentially leading to symptoms such as shortness of breath and chest pain. Understanding this definition is crucial for recognizing the clinical implications and appropriate interventions for patients experiencing pneumothorax.