17th February 2025

A 64-year-old lady presents to respiratory clinic with progressive shortness of breath and a productive cough which has worsened over the last 6 months.

A 64-year-old lady presents to respiratory clinic with progressive shortness of breath and a productive cough which has worsened over the last 6 months. She has a 40-pack-year smoking history and a quiet expiratory wheeze throughout her chest. Which of the following lung function findings would be diagnostic of the likely underlying pathology?

Select the SINGLE most appropriate option from the list below. Select ONE option only.