Endotracheal tube (ETT) corresponds to which type of airway?

• A. Secured airway
• B. Unsecured airway
• C. Partial airway
• D. Obstructed airway

Answer: (A)

An endotracheal tube provides a secured airway because it creates a definitive, protected passage into the trachea. By threading through the vocal cords into the trachea and inflating the cuff, it seals the airway so ventilation can be delivered reliably and aspiration of secretions or stomach contents is prevented. The tube is also anchored in place to prevent displacement, which is a hallmark of a secured airway. In contrast, devices that merely keep a passage open without sealing (or that don’t protect against aspiration) do not offer the same level of security.