Identifying the features of an easy-to-use and intuitive dry powder inhaler for asthma and chronic obstructive pulmonary disease therapy: results from a 28-day device handling study, and an airflow resistance study

摘要

Background: Many patients with asthma and chronic obstructive pulmonary disease (COPD) symptoms remain insufficiently controlled despite inhalation treatment, with poor inhaler technique recognized as a significant contributor. Dry powder inhalers (DPIs) need less coordination of actuation and inspiration than pressured metered dose inhalers.