Endotracheal tubes are used to seal the trachea during inhalant anesthesia or to protect the airway in an anesthetized dog or cat. The most common type used in veterinary medicine is the Magill tube. They range in size from 3 mm to 40 mm (internal diameter). These tubes have a beveled tip and are curved and may be cuffed or uncuffed, although cuffed tubes are most commonly used. Uncuffed tubes may be used in very small animals where the cuff may be sufficiently large to prevent placement of a tube of adequate diameter. Cole tubes, originally designed for pediatric anesthesia, are less commonly used in veterinary medicine but have been used in cats. These tubes are designed such that the shoulder of the tube touches the larynx and provides an
