Aerosol PropellantsNitrous OxideChlorofluorocarbonsHydrocarbons, FluorinatedChlorofluorocarbons, MethaneMetered Dose InhalersAerosolsNebulizers and VaporizersAnesthetics, InhalationAnesthesia, InhalationFenoterolAdministration, InhalationNitric Oxide SynthaseBeclomethasoneAlbuterolPowdersBronchodilator AgentsAnti-Asthmatic AgentsIsofluraneEquipment DesignXenonMethyl EthersDenitrificationAnesthetics, CombinedParticle SizeHalothaneNitric Oxide Synthase Type IIAsthmaAnesthesia, GeneralNitritesOxidesFentanylEnfluraneAnesthesia, DentalGas ScavengersNitric Oxide Synthase Type IIIAnestheticsNitrates5-Methyltetrahydrofolate-Homocysteine S-MethyltransferasePropofolAnesthesia Recovery PeriodOxidoreductasesAnesthetics, IntravenousNitric Oxide Synthase Type INitrogen OxidesAlfentanilPreanesthetic MedicationAnalgesics, Non-Narcotic