A 2-year-old toddler is seen for acute laryngotracheobronchitis. What observation would lead the nurse to suspect airway occlusion?

Choice A rationale While lethargy and crying about tiredness can be a general sign of worsening illness or hypoxia due to increased work of breathing, it is not the most specific or critical sign of impending complete airway occlusion, which requires immediate recognition and intervention to prevent respiratory arrest. Choice B rationale Increased nasal discharge is a common symptom in upper respiratory tract infections, such as those that often precede laryngotracheobronchitis (croup), but it does not directly indicate an imminent or complete occlusion of the lower or upper airway structure, which is a life-threatening emergency. Choice C rationale In the initial stages of respiratory distress, the respiratory rate increases (tachypnea) as a compensatory mechanism to improve gas exchange and oxygenation. A sudden or gradual decrease in a child's respiratory rate following a period of tachypnea, often accompanied by decreased effort, signals respiratory fatigue and imminent failure, which is the most critical sign of severe, progressing airway occlusion. Choice D rationale Increased retractions, or the visible sinking of the chest wall when breathing, indicate a high work of breathing and severe respiratory distress, such as that seen with obstruction. While serious, a decreasing respiratory rate after this period of distress is an even later and more ominous sign of complete respiratory collapse and fatigue.