Review Question - QID 220671

A 14-year-old girl is evaluated in urgent care after experiencing an episode of shortness of breath. She was in gym class playing soccer when she felt tightness in her chest. These episodes happen roughly 3 times per month and never happen at night. She has no limitations in her activity in between these episodes of shortness of breath. She has a history of seasonal allergies and is up to date on all her vaccinations. Her 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 was obtained, and the results are shown in Figure A. She is treated with a medication, and 5 minutes later, her labs are as follows:
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