It is an auxiliary tool of MDI for asthma treatment, and it is used to store aerosol.
It is mainly used among children and patients with poor coordination of inhalation
and hand gestures, or obvious side effect in throat after using aerosol.
Especially, spacer can reduce drug retention in the oropharynx, improve drug deposition,
and help patients obtain better treatment effect, significantly reduce side effect of
cortical hormone inhalation.