Outcome of salbutamol dose delivered via metered-dose inhaler (MDI) and different MDI–spacer combinations in 4 L volume of inhalation (assuming adult inhalation volume)
| MDI or MDI/accessory device | Nature | Emitted dose % | Dose deposited in spacer % |
| MDI only | 86.8 ± 5.1 | NA | |
| Aerochamber mouthpiece | Antistatic | 71.6 ± 4.4 | 16.8 ± 3.30 |
| Aerochamber mask | Antistatic | 69.7 ± 5.4 | 18.9 ± 4.9 |
| Able spacer mouthpiece | Antistatic | 64.2 ± 6.9 | 23.2 ± 4.3 |
| Able spacer mask | Antistatic | 61.2 ± 6.6 | 24.1 ± 4.9 |
| Tips-haler mouthpiece | Antistatic | 53.6 ± 7.2 | 34.4 ± 7.4 |
| Tips-haler mask | Antistatic | 51.3 ± 4.7 | 34.6 ± 5.8 |
| Dolphin chamber mouthpiece | Non-antistatic | 31.9 ± 5.4 | 56 ± 4.7 |
| Dolphin chamber mask | Non-antistatic | 30.5 ± 5.6 | 55.2 ± 9.7 |
| Dolphin chamber wash | Non-antistatic | 49.7 ± 6.4 | NA |
| Drink bottle mouthpiece | Non-antistatic | 35.3 ± 6.9 | 50.2 ± 4.3 |
| Drink bottle wash | Non-antistatic | 51.2 ± 7.1 | NA |
Data are presented as mean±sd. NA: not applicable.