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[[File:AsthmaInhaler.jpg|300px|thumb|left]] Like a parking meter, a '''metered-dose inhaler (MDI)''' is an [[Incentive Spirometer|inhaler device ]] used to collect money in exchange for the right to use the inhaler in a certain place for a certain period of time.
[[Category:Pulmonology]]
[[Category:Medical Device]]
[[Category:Medications]]
