7th February 2024

A 43-year-old female presents with shortness of breath on exertion.

A 43-year-old female presents with shortness of breath on exertion. This has been gradual over the past 6-9 months. She currently is short of breath, mobilising 1 meter, and was previously able to make it to the shop. She has an accompanying dry cough. Bilateral fine crepitations were heard at both lung bases. CXR revealed bilateral fine reticulation predominantly affecting the lung bases with bilateral volume loss. 

Which of the following spirometry results is expected?