A client arrives to the emergency department (ED) following a motor vehicle collision. The nurse observes the client experiencing increasing dyspnea and notes absent breath sounds on the left side. Which procedure should the nurse prepare the client for?

A. Endotracheal intubation: Endotracheal intubation is performed to secure the airway and provide mechanical ventilation in cases of respiratory failure or inability to maintain airway patency. Although dyspnea may require airway support, the key finding here strongly suggests a pneumothorax or hemothorax rather than primary airway obstruction. B. Bronchoscopy: Bronchoscopy is a diagnostic and sometimes therapeutic procedure used to visualize the bronchial tree, remove foreign bodies, or evaluate airway lesions and bleeding. In a trauma setting with suspected pneumothorax, immediate decompression of the pleural space is required rather than visualization of the bronchial passages. C. Pulmonary function test: Pulmonary function tests evaluate lung volumes, airflow, and gas exchange to diagnose chronic respiratory conditions such as asthma, COPD, or restrictive lung disease. These tests require patient stability and cooperation and are not performed in emergency trauma situations. Acute dyspnea with unilateral absent breath sounds indicates a life-threatening condition requiring rapid intervention. D. Chest tube insertion: Absent breath sounds on one side following blunt chest trauma strongly suggests pneumothorax or hemothorax, conditions where air or blood accumulates in the pleural space and compresses the lung. A chest tube (tube thoracostomy) is inserted to evacuate air or fluid, allowing the lung to re-expand and restoring effective ventilation.