A nurse is caring for a toddler who has laryngotracheobronchitis. For which of the following findings should the nurse monitor to detect airway obstruction?

A. Increased heart rate: Tachycardia may indicate hypoxia due to worsening airway obstruction. It’s an early warning sign. B. Decreased temperature: Not a sign of obstruction; fever may remain elevated. C. Decreased stridor: May seem like improvement, but silent chest can mean complete obstruction- needs cautious evaluation. D. Decreased restlessness: Could be a sign of fatigue and impending respiratory failure, not improvement.