Foreign Body Esophagus (Coin)

A 3-year-old boy presents to the emergency department 4 hours after witnessed coin ingestion. He is drooling, refusing food and liquids, and has vomited twice. Chest radiograph shows a single radiopaque, coin-shaped foreign body at the level of the upper esophageal sphincter (C6-T1), appearing circular on the anteroposterior view and linear on the lateral view—classic coronal orientation. There is no double-ring sign, pneumomediastinum, or subcutaneous emphysema. The child is alert, afebrile, with normal respiratory effort and clear breath sounds. Which of the following management approaches marked **A** in the diagram is most appropriate for this symptomatic child with an esophageal coin at the upper esophageal narrowing?