A nurse is assisting with the care of a preschooler who has manifestations that suggest epiglottitis. Which of the following actions should the nurse take?

A. Collect a sputum sample: Attempting to collect a sputum sample can trigger a gag or cough reflex, potentially causing complete airway obstruction in a child with epiglottitis. This action is unsafe in a suspected airway emergency. B. Obtain a specimen for throat culture: Throat culture requires direct visualization or manipulation of the throat, which can provoke laryngospasm or airway compromise in epiglottitis. Invasive procedures should be avoided until the airway is secured. C. Determine the preschooler's oxygen saturation level: Assessing oxygen saturation is a noninvasive way to monitor respiratory status and detect hypoxia early. It provides critical information on the child’s oxygenation without manipulating the airway, making it a safe first action. D. Inspect the preschooler's tonsils for edema: Direct inspection of the throat can precipitate sudden airway obstruction in epiglottitis. Visual examination should be avoided until the child is in a controlled setting with airway management available.