Surgical Tech Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

The purpose of a closed chest drainage system is primarily associated with fluid removal from the pleural space, which allows for proper lung expansion and function. When pleural effusions or pneumothoraces occur, these conditions can hinder the lung's ability to expand fully due to the presence of excess fluid or air. The closed chest drainage system effectively evacuates this fluid or air, thereby restoring negative pressure within the pleural cavity and promoting better lung ventilation.

While restoring negative pressure is beneficial for lung mechanics and overall respiratory function, the core aim of using a closed chest drainage system is to manage pleural effusions or pneumothoraces by enabling removal of fluid or air. This helps to allow the lungs to re-inflate, maximizing their efficiency during ventilation.

The other options may relate to overall patient care but do not directly describe the mechanism or primary purpose of a closed chest drainage system. Therefore, understanding its role in fluid removal is crucial for comprehending its importance in surgical and respiratory management.