The Monaghan AeroChamber Plus Z STAT Anti-Static Valved Holding Chamber (aVHC) helps improve the delivery of medications from metered-dose inhaler (MDI) canisters. It also reduces the coordination required between canister activation and inhalation, making it easier for the patient to use the MDI correctly. It also reduces drug deposition to the mouth and throat, helping to eliminate unpleasant medication taste or hoarseness. AeroChamber Plus Z STAT aVHC comes in three sizes, permitting MDI therapy to be administered to infants and small children. ComfortSeal masks are available in two sizes to allow use by infants and small children.