1 MCQs in Medicine for NEET PG
A 68-year-old male smoker (50 pack-years) presents with acute severe dyspnea, productive purulent cough, and use of accessory muscles. Spirometry shows FEV1 22% predicted with a flow-volume loop demonstrating the severely scooped expiratory limb marked **A** in the diagram. Which of the following pathophysiological mechanisms BEST explains the scooping pattern seen at **A**?
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