Biomedical Engineering Reference
In-Depth Information
fitted between the mouthpiece of the inhaler and patient's mouth (Figure 4)
(Dunsky et al., 2005).
(Source: Newman, 2005).
Figure 3 Metered-dose inhaler (MDI) in which drug is dissolved or dispersed in a
liquified propellant system. Actuation of the device causes release of the drug-
propellant liquid. The propellant quickly evaporates leaving fine particles of the drug
for inhalation.
(Source:
Dunsky
et al., 2005).
Figure 4. Spacers are fitted from the back end to a metered dose inhaler and front end
to patient's mouth.
