Soru

A 9-year-old boy with a history of mild persistent asthma presents to the emergency department with a 24-hour history of worsening cough, shortness of breath, and chest tightness. He recently had symptoms of a mild viral upper respiratory tract infection. Vital signs show a temperature of $37.2^\circ\text{C}$ ($99.0^\circ\text{F}$), heart rate of $115/\text{min}$, respiratory rate of $28/\text{min}$, and oxygen saturation of $94\%$ on room air. Physical examination reveals mild intercostal retractions and diffuse expiratory wheezing bilaterally. Which of the following are appropriate initial steps in the management of this patient's condition? (Select all that apply)