A 4-year-old female is brought in by her patients to the emergency department with complaints of sudden onset difficulty breathing and a high-pitched sound while inhaling (stridor). The parents report that the patient was well until earlier today when she developed a fever and sore throat. Over the past few hours, she has become increasingly irritable and anxious, and she refuses to lie down. She is drooling excessively and has difficulty swallowing. There is no history of choking or ingestion of foreign bodies. Epiglottitis is suspected.