Prevalence and COPD Phenotype for a Suboptimal Peak Inspiratory Flow Rate against the Simulated Resistance of the Diskus ^® Dry Powder Inhaler

Abstract

Approximately one out of five patients with advanced COPD and ≥ 60 years of age exhibited a suboptimal PIFRresist against the Diskus. For the first time, a clinical phenotype of such patients with a suboptimal PIFRresist was identified. It is reasonable to measure a patient's PIFR against the simulated resistance of a specific DPI if there is concern about clinical benefit using the dry powder medication.