Which statement about confirming endotracheal tube placement in the prehospital setting is most accurate?

• A. Rely solely on observing chest movement
• B. Use only epigastric auscultation
• C. Ignore breath sounds if the patient has chest trauma
• D. Check for chest expansion and auscultation of equal bilateral breath sounds

Answer: (D)

Confirming tube placement relies on signs that show air is actually reaching the lungs through the trachea. The best statement here is to verify chest expansion and listen for equal breath sounds on both sides. Chest expansion indicates the lungs are being inflated, while equal bilateral breath sounds suggest the tube is in the trachea and both lungs are ventilated rather than the tube being in the esophagus or causing uneven inflation. Relying only on chest movement can be misleading—air can move into the chest even if the tube isn’t positioned correctly. Using only epigastric auscultation can mislead you, since sounds in the belly don’t reliably reflect where the tube is or how well the lungs are being ventilated. Ignoring breath sounds in the setting of chest trauma bypasses a crucial check that helps detect misplaced tube or asymmetric ventilation. In real practice, clinicians also use end-tidal CO2 to confirm placement, but among the options given, the combination of observing chest expansion and ensuring equal bilateral breath sounds is the most accurate and reliable single check.