ASRT Student Exam Assessment Library (SEAL) Practice Exam

The primary function of thoracostomy tubes is to drain the intrapleural space and mediastinum. This procedure is typically performed to remove air (pneumothorax), fluid (pleural effusion), or blood (hemothorax) from the pleural cavity, which can relieve pressure on the lungs and improve breathing. By allowing for better lung expansion and restoring normal pressures in the thoracic cavity, thoracostomy tubes play a critical role in managing various thoracic conditions.

Other options related to delivering chemotherapy drugs, monitoring radiation exposure, or providing supplemental oxygen do not pertain to the purpose of thoracostomy tubes and address different medical interventions or treatments altogether. Thus, the focus of thoracostomy tubes remains on ensuring proper lung function by facilitating drainage in the thoracic region.