Review Question - QID 220715

An 18-year-old man is evaluated in urgent care after experiencing an episode of shortness of breath. He was playing soccer with his friends when he felt tightness in his chest. He has asthma and has used various medications over the years to control his asthma. His temperature is 98°F (36.6°C), blood pressure is 110/70 mmHg, pulse is 88/min, and respirations are 18/min with an oxygen saturation of 98% on room air. A physical exam shows no significant findings. A chest radiograph is shown in Figure A. He is treated with a medication, and 15 minutes later, his labs are as follows:
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