A young adult is brought to the emergency department after taking a handful of drugs. The client is unresponsive, so an endotracheal tube (ETT) is inserted. How should the nurse determine if the ETT is correctly placed? Select all that apply.

A. Monitor ETT markings between 22 and 26 cm at teeth line: Proper depth of the ETT is essential to ensure the tube is not inserted too far into one bronchus or too shallow, which could compromise ventilation. Observing the markings provides an initial guide to placement. B. Obtain a portable chest x-ray to verify ETT location: A chest x-ray is the gold standard for confirming ETT placement in the trachea and ensuring it is positioned above the carina. This helps prevent complications such as right mainstem bronchus intubation. C. Check for capillary refill of 3 seconds or less: Capillary refill assesses peripheral perfusion, not ETT placement or airway patency. It is not a reliable indicator for correct intubation. D. Assess for symmetrical chest movement: Symmetrical chest rise indicates both lungs are being ventilated, suggesting proper ETT positioning and preventing unilateral lung ventilation. E. Auscultate for presence of bilateral breath sounds: Listening for breath sounds in both lungs confirms that the tube is in the trachea rather than a bronchus. Absence of unilateral breath sounds may indicate malposition.