A 44-year-old man with a history of Hodgkin disease treated with radiation presents to the GP for a six-month history of progressively worsening shortness of breath. Spirometry is performed and shows a greater than predicted maximal expiratory flow. Which of the following best explains these findings?
Greater alveolar collapse due to fibrosis
Hyperinflation of the pulmonary parenchyma
Radial traction on the airways
Vasodilation secondary to hypercapnia
Vasodilation secondary to hypoxia
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Cut-to-the-chase Answer (0:43):
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HY USMLE Answer (3:51):
