Outcome of salbutamol dose delivered via metered-dose inhaler (MDI) and different MDI–spacer combinations in 1 L volume of inhalation (assuming young child inhalation volume)
| MDI or MDI/accessory device | Nature | Emitted dose % | Dose deposited in spacer % |
| MDI only | 84.1 ± 6 | NA | |
| Aerochamber mask | Antistatic | 58.3 ± 6.5 | 30.1 ± 6.9 |
| Able spacer mask | Antistatic | 55.6 ± 6.3 | 31.6 ± 4.2 |
| Tips-haler mask | Antistatic | 46.4 ± 5.8 | 38.3 ± 9.8 |
Data are presented as mean±sd. NA: not applicable.