MasksLaryngeal MasksMaterials TestingRespiratory Protective DevicesIntubation, IntratrachealPerceptual MaskingAir PressureEquipment DesignManikinsDisposable EquipmentFiber Optic TechnologyDental MaterialsBiocompatible MaterialsAnesthesia, GeneralLaryngoscopyPositive-Pressure RespirationDental Impression MaterialsRespiration, ArtificialCricoid CartilageProtective ClothingAirway ObstructionTime FactorsRespiratory InsufficiencyDramaAnesthesia, InhalationTidal VolumeOxygen Inhalation TherapyInhalation SpacersContrast SensitivityAerosolsSurface PropertiesSensory ThresholdsPressureNoninvasive VentilationLarynxManufactured MaterialsPharyngitisLaryngismusPsychophysicsEquipment Failure AnalysisEye Protective DevicesTeaching MaterialsNeuromuscular BlockadeVentilators, MechanicalIntermittent Positive-Pressure VentilationProspective StudiesAnesthesiaConstruction MaterialsEpiglottisReproducibility of ResultsIntubationNebulizers and VaporizersPhotic StimulationCross-Over StudiesAirPattern Recognition, VisualMicroscopy, Electron, ScanningImmobilizationFiltrationAirway ManagementPneumonia, AspirationRespirationInfectious Disease Transmission, Patient-to-ProfessionalSubliminal StimulationAir MicrobiologyPharynxMethyl EthersModels, AnatomicTreatment OutcomeContinuous Positive Airway Pressure