Image of the Week: Which pulmonary function test findings would you expect?

A 60-year-old woman presents with a five-year history of progressive cough, dyspnea, and wheezing. She mentions her productive cough with clear sputum is typically worse in the morning. She acknowledges a 50 pack-year history of smoking. Examination reveals a barrel chest and a forced expiratory time of 12 seconds. A chest X-ray demonstrates widely spaced ribs, reduced vascular markings, and ...