Final answer:
The appropriate action for a nurse obtaining data on a child with epiglottitis is to ask the registered nurse to visualize the child's throat.
Step-by-step explanation:
In the assessment of a child with suspected epiglottitis, asking the registered nurse to visualize the child's throat is the appropriate action. Visualization enables the nurse to assess for signs of epiglottitis, such as swelling and inflammation of the epiglottis. The use of a flashlight and tongue blade or a sterile tongue blade and Culturette swab is not recommended, as it may provoke a gag reflex and worsen airway obstruction in cases of epiglottitis. Prompt involvement of a skilled healthcare professional ensures a comprehensive and safe evaluation, with readiness for immediate intervention if there is any compromise to the airway.