Question

A 70-year-old man with a 40-pack-year history presents with chronic cough and sputum production. FEV1/FVC ratio is 0.6 post-bronchodilator. According to CTS COPD guidelines, what is the key diagnostic criterion?

Accepted Answer

Post-bronchodilator FEV1/FVC <0.7 confirming persistent airflow limitation

Answer

Reversible airway obstruction with bronchodilator

Answer

Normal spirometry with hyperinflation on imaging

Answer

Low DLCO alone

Answer

Elevated total lung capacity alone

Practice question

A 70-year-old man with a 40-pack-year history presents with chronic cough and sputum production. FEV1/FVC ratio is 0.6 post-bronchodilator. According to CTS COPD guidelines, what is the key diagnostic criterion?