Endotracheal tube tip position in dogs should lie between which landmarks?

• A. Between the larynx and the thoracic inlet
• B. Within the esophagus
• C. Beyond the carina
• D. In the nasal cavity

Answer: (A)

The main concept is proper endotracheal tube tip position: it should lie within the trachea, cranial to the thoracic inlet and caudal to the larynx. Placing the tip here ensures the airway is ventilated through the trachea and into both lungs, while avoiding the esophagus, which would not ventilate and could lead to aspiration. If the tip goes beyond the carina, it risks mainstem bronchus intubation and uneven ventilation. Being in the nasal cavity would not function as an airway at all. In dogs, the goal is to have the tube inside the trachea, between the larynx and the thoracic inlet, with verification by breath sounds and capnography.