Final answer:
When breath sounds are heard only on one side following ETT insertion, it indicates that the tube might be incorrectly positioned, most likely in the right main bronchus. The correct response is to ventilate and reposition the ETT as needed.
Step-by-step explanation:
If you have inserted an endotracheal tube (ETT) and you hear breath sounds on the right side of the chest only, the ETT may be incorrectly positioned, potentially in the right main bronchus. The correct course of action is to ventilate the lungs and reposition the ETT if needed. This situation could potentially lead to a pneumothorax if not assessed and managed correctly. Given the color change in the CO2 detector, there is indication that there is some airflow exchange, suggesting the tube is in the respiratory tract but not ideally positioned. Close monitoring and immediate correction of the tube's position is key to restoring adequate bilateral ventilation and preventing complications upon intubation.