If you suspect misplacement of an endotracheal tube, what should you do first?

• A. Reassess with capnography and auscultation, check chest movement, and be prepared to reposition or reintubate if necessary.
• B. Ignore and continue ventilation.
• C. Verify only with chest X-ray.
• D. Remove the tube immediately without confirmation.

Answer: (A)

When an endotracheal tube misplacement is suspected, the first priority is real-time verification of placement and effective ventilation. Use capnography to confirm CO2 in exhaled gas, and pair that with auscultation of breath sounds and observation of chest movement. This combination provides immediate, functional evidence that the tube is in the trachea and air is being delivered to the lungs. If the capnography trace is absent or if breath sounds are unequal or absent and chest movement is poor or asymmetric, be prepared to reposition or reintubate promptly.

Relying on imaging like chest X-ray takes time and does not prevent a dangerous pause in ventilation, and removing the tube without confirming placement can lead to losing the airway entirely. So the best first step is to reassess with capnography and auscultation, and watch chest rise, with readiness to reposition or reintubate if needed.