TABLE 3

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 deviceNatureEmitted dose %Dose deposited in spacer %
MDI only84.1 ± 6NA
Aerochamber maskAntistatic58.3 ± 6.530.1 ± 6.9
Able spacer maskAntistatic55.6 ± 6.331.6 ± 4.2
Tips-haler maskAntistatic46.4 ± 5.838.3 ± 9.8

Data are presented as mean±sd. NA: not applicable.