Table 1 Means (sd) of emitted dose velocity for each MDI and for the SMI, at different canister filling and distance from the nozzle. Anova for comparisons
5 cm | 10 cm | 20 cm | Anova p | ||
|---|---|---|---|---|---|
MDI A | 90% | 35.5 (7.9) | 23.1 (1.6) | 12.5 (1.5) | 0.001 |
50% | 30.2 (10.0) | 21.8 (2.4) | 7.2 (6.4) | 0.001 | |
10% | 27.5 (9.7) | 21.7 (2.3) | 3.9 (6.2) | 0.001 | |
Anova p | <0.037 | ns | <0.05 | ||
MDI B | 90% | 63.1 (9.7)a | 51.3 (5.7) | 32.1 (2.4) | 0.001 |
50% | 60.0 (9.3)a | 51.7 (11.5) | 31.4 (4.5) | 0.001 | |
10% | 42.3 (6.4) | 33.3 (1.5%) | 18.4 (0–9) | 0.001 | |
Anova p | <0.001 | <0.001 | <0.001 | ||
MDI C | 90% | 47.4 (7.7) | 28.1 (2.5) | 17.9 (2.4) | 0.001 |
50% | 40.5 (7.4) | 25.5 (1.7) | 16.7 (2.4) | 0.001 | |
10% | 37.7 (4.8) | 27.9 (3.5) | 17.8 (2.1) | 0.001 | |
Anova p | ns | ns | ns | ||
MDI D | 90% | 40.7 (11.7) | 22.2 (1.4) | 12.2 (0.8) | 0.001 |
50% | 36.4 (6.9) | 20.1 (2.0) | 11.7 (1.1) | 0.001 | |
10% | 31.3 (3.7) | 19.3 (1.6) | 10.7 (1.2) | 0.001 | |
Anova p | <0.005 | ns | <0.05 | ||
MDI E | 90% | 45.0 (4.1) | 32.0 (3.3) | 17.2 (1.4) | 0.001 |
50% | 41.4 (7.1) | 29.3 (5.0) | 16.1 (1.5) | 0.001 | |
10% | 31.2 (9.7) | 21.7 (1.7) | 12.9 (2.7) | 0.001 | |
Anova p | <0.001 | <0.01 | <0.02 | ||
SMI | 90% | 5.7 (0.5)b | 3.6 (0.5) | 1.8 (0.4) | 0.001 |
50% | 5.2 (1.6)b | 3.5 (0.9) | 1.8 (0.5) | 0.001 | |
10% | 5.0 (1.3)b | 3.3 (1.1) | 1.6 (0.7) | 0.001 | |
Anova p | ns | ns | ns |