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Main Factors Associated to Inspiratory Flow Rate
| Patient-related |
| Inspiratory capacity |
| Inspiratory effort |
| Comorbidities |
| Inhalation technique |
| COPD-related |
| Severity |
| Hyperinflation |
| Exacerbations |
| Respiratory muscle alterations |
| Inhalation device-related |
| Internal resistance |
| Disaggregation of the powdered drug dose (DPIs) |
Abbreviations: COPD, chronic obstructive pulmonary disease; DPIs, dry powder inhalers.
