A definitive airway is secured below the level of which anatomical structure?

A definitive airway is secured below the level of which anatomical structure?

• A. Vocal cords
• B. Carina
• C. Epiglottis
• D. Pharynx

Answer: (A)

A definitive airway is one that sits in the trachea, typically with an endotracheal tube or tracheostomy. To truly secure the airway, the tube must be passed through the vocal cords into the trachea, so it lies below the level of the vocal cords. The vocal cords are the gateway from the larynx into the trachea; securing here bypasses the upper airway structures that could compromise ventilation or protection against aspiration. The epiglottis and pharynx are above the cords, so placing a tube there would not yield a true tracheal airway. The carina is much further down in the airway; while you want the tube tip above it to ventilate both lungs, the defining landmark for a definitive airway is crossing the vocal cords.

A definitive airway is one that sits in the trachea, typically with an endotracheal tube or tracheostomy. To truly secure the airway, the tube must be passed through the vocal cords into the trachea, so it lies below the level of the vocal cords. The vocal cords are the gateway from the larynx into the trachea; securing here bypasses the upper airway structures that could compromise ventilation or protection against aspiration. The epiglottis and pharynx are above the cords, so placing a tube there would not yield a true tracheal airway. The carina is much further down in the airway; while you want the tube tip above it to ventilate both lungs, the defining landmark for a definitive airway is crossing the vocal cords.