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, ...
Hypercapnic patients were best separated from normocapnic patients using thresholds for FVC% of 56% predicted and 33% predicted for FEV1%. Hypercapnia in patients with chronic obstructive pulmonary ...