Your patient is a tall, thin, 34-year-old male complaining of shortness of breath. He gives a 3-day history of runny nose, sore throat, and a nonproductive cough. His shortness of breath began after a long bout of hard coughing. His skin is cool, dry, and slightly pale. Lung sounds are clear and equal bilaterally. HR = 102, BP = 136/90, RR = 16, SaO2 = 95%. Which of the following is the most appropriate course of action?