A 52-year-old woman comes to the general medicine clinic ...

His oxygen saturation on room air is 90%. Auscultation of the lungs reveals diffuse wheezing. A chest x-ray is performed and demonstrates hyperinflated lungs, flattened diaphragms, and no evidence for infiltrates. The patient is placed on 30% supplemental oxygen and nebulized albuterol by face mask. ................
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