| Maintenance of TLC for < 10 s after inhalation (patients are instructed to hold their breath for 10 s after inhalation) |
75 |
| Not exhaling prior to inhalation (patients did not exhale before using their DPIs) |
62 |
| Inadequate inspiratory flow rate (patients inhaled too quickly, shallowly, or both) |
57 |
| Incomplete inhalation (patients did not perform a deep inhalation maneuver) |
21 |
| Incorrect dose preparation (patients did not place the capsule inside their DPIs, did not puncture the capsule before inhalation, or both)* |
18 |
| Inhaling shallowly (patients did not perform a deep inhalation maneuver) |
5 |
| Exhaling into the device (patients exhaled while their DPIs were in their mouth) |
3 |
| Nasal breathing (patients breathed through their nose during inhalation) |
2 |
| Inhaling irregularly (patients were unable to inhale continuously) |
2 |
| DPI: dry powder inhaler. *For the DPI type used in the present study (adaptation). |
