TABLE 2

Outcome of salbutamol dose delivered via metered-dose inhaler (MDI) and different MDI–spacer combinations in 2 L volume of inhalation (assuming old child inhalation volume)

MDI or MDI/accessory deviceNatureEmitted dose %Dose deposited in spacer %
MDI only87.2 ± 6.9NA
Aerochamber maskAntistatic69.8 ± 5.818.7 ± 4.1
Able spacer mouthpieceAntistatic66.2 ± 622.3 ± 4.3
Able spacer maskAntistatic64.3 ± 5.124.1 ± 4.9
Tips-haler mouthpieceAntistatic53.9 ± 6.538.2 ± 4.5
Tips-haler maskAntistatic51.5 ± 6.134.5 ± 6
Dolphin chamber mouthpieceNon-antistatic32.4 ± 6.753.7 ± 5.5
Dolphin chamber maskNon-antistatic32.2 ± 6.457.6 ± 3.5
Dolphin chamber washNon-antistatic47.6 ± 5.9NA
Drink bottle mouthpieceNon-antistatic34.3 ± 7.354 ± 9.3
Drink bottle washNon-antistatic49.9 ± 6.2NA

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