Which patient should the nurse arrange for immediate evaluation in the emergency department?

The child diagnosed with acute epiglottitis who is drooling should be prioritized for immediate evaluation in the emergency department due to the potential for a life-threatening airway obstruction. Acute epiglottitis is an inflammation of the epiglottis that can lead to rapid swelling and compromise the airway, making it a medical emergency. The presence of drooling indicates difficulty in swallowing and potential respiratory distress, highlighting the urgency of the situation.

In comparison, while a febrile child with urination pain, a leukemia patient with petechiae, and a child with otitis media and fever all require attention, their conditions do not represent the immediate threat to life that drooling from epiglottitis poses. Hence, the priority should be given to the child exhibiting signs of severe airway compromise.