7th February 2024

A 67-year-old stonemason presents with shortness of breath that has been progressive for the past three years.

A 67-year-old stonemason presents with shortness of breath that has been progressive for the past three years. He was previously able to mobilise to the shops but is now breathless at rest. He notes a persistent dry cough for the past two years. Examination reveals bilateral fine crepitations. CXR shows perihilar lymphadenopathy with bilateral ground-glass opacities and volume loss. 

Which of the following spirometry results are expected?