The guideline-recommended FEV1:FVC value of less than 0.70 is the optimal cutoff for the diagnosis of clinically significant chronic obstructive pulmonary disease (COPD), researchers say. The study, ...

"Physicians should feel more confident in following the recent guideline recommendations both to use race-neutral reference equations and to use z scores for assessing severity…Together, these changes ...

Doctors can diagnose emphysema using several tests, including spirometry. This test measures how much air a person can exhale from their lungs after taking a deep breath. Other tests may include ...