Soru

A $22$-month-old toddler is evaluated in the emergency department for a persistent cough and noisy breathing that started abruptly while he was eating a snack mix containing peanuts at a family gathering the previous day. Initially, he had a vigorous coughing fit that resolved after several minutes, prompting the parents to monitor him at home. Today, he developed a mild fever of $37.6^\circ\text{C}$ ($99.7^\circ\text{F}$) and ongoing tachypnea. He has no history of atopy, prior wheezing, or recent upper respiratory infections. Current vital signs show a heart rate of $128\text{/min}$, respiratory rate of $46\text{/min}$, and oxygen saturation of $93\%$ on room air. Physical examination reveals asymmetric chest expansion. Auscultation demonstrates prolonged expiration with a high-pitched wheeze exclusively over the right hemithorax. The left lung field has normal vesicular breath sounds. Which of the following is the most appropriate next step in management?