Which action by a new nurse caring for a child with epiglottitis would require intervention from a preceptor?

In caring for a child with epiglottitis, obtaining a throat culture is an action that would require intervention from a preceptor because it poses significant risks. Epiglottitis can lead to airway obstruction, and attempting to assess the throat by swabbing can provoke swelling or spasm, worsening the child's condition and potentially leading to complete airway obstruction.

In this context, the primary concern is ensuring the safety and stability of the airway before any invasive procedures are performed. The focus for the nurse should be on maintaining an open airway and preparing for potential respiratory distress. Actions like positioning the patient appropriately, initiating vascular access for medication or fluids, and ensuring that emergency equipment, such as a bag-valve mask, is readily available are all appropriate and contribute to a safe clinical environment for the child.