Table 2 Device technique errors observed at baseline
Critical steps failed at baseline | Failed, n (%) |
|---|---|
pMDI errors (n=20) | |
 1. Hold inhaler upright and shake well a | 2 (10) |
 2. Breathe out gently away from mouthpiece | 8 (40) |
 3. Breathe in slowly and deeply through the mouth, and press down on canister a | 6 (30) |
 4. Continue to breathe in slowly and deeply a | 7 (35) |
 5. Hold breath for about 10s | 14 (70) |
pMDI + spacer errors (n=13) | |
 1. Hold inhaler upright and shake well | 1 (8) |
 2. Insert inhaler upright into spacer | 0 (0) |
 3. Breathe out gently into spacer | 4 (31) |
 4. Hold spacer level and press down firmly on canister once | 0 (0) |
 5. Breathe in slowly and deeply then hold breath 10 seconds or breathe in normally for 4 breaths | 3 (23) |
Turbuhaler errors (n=47) | |
 1. Hold inhaler upright while twisting grip around, then back until click is heard a | 14 (30) |
 2. Breathe out gently away from mouthpiece a | 15 (32) |
 3. Breathe in strongly and deeply a | 14 (30) |
 4. Breathe out gently away from mouthpiece | 11 (23) |
Accuhaler (n=20) | |
 1. Open inhaler using thumb grip a | 2 (10) |
 2. Hold inhaler horizontally, slide lever until it clicks to load dose a | 1 (5) |
 3. Breathe out gently away from mouthpiece a | 14 (70) |
 4. Breathe in steadily and deeply a | 10 (50) |
 5. Breathe out gently away from mouthpiece | 9 (45) |
