A victim with a complete airway obstruction...

In cases of complete airway obstruction, the victim is unable to speak or produce effective cough sounds due to the airway being entirely blocked. This situation prevents any airflow from passing through the trachea, which is necessary for speech and the forceful expulsion of air needed to generate a strong cough. Recognizing this symptom is vital, as it signals a severe emergency requiring immediate intervention.

Understanding this definition helps responders effectively assess the severity of the obstruction and react appropriately, such as performing the Heimlich maneuver or initiating other life-saving actions. This stark inability to communicate or cough forcefully thus distinguishes complete airway obstruction from less severe conditions where the victim may still have some airflow.