MasksLaryngeal MasksRespiratory Protective DevicesIntubation, IntratrachealPerceptual MaskingAir PressureManikinsEquipment DesignDisposable EquipmentFiber Optic TechnologyAnesthesia, GeneralPositive-Pressure RespirationLaryngoscopyRespiration, ArtificialGerm LayersCricoid CartilageAirway ObstructionRespiratory InsufficiencyDramaSmear LayerAnesthesia, InhalationProtective ClothingTidal VolumeOxygen Inhalation TherapyContrast SensitivitySensory ThresholdsInhalation SpacersNoninvasive VentilationTime FactorsAerosolsPhotic StimulationPressurePsychophysicsPharyngitisLaryngismusLarynxRetinaNeuromuscular BlockadeIntermittent Positive-Pressure VentilationAnesthesiaEye Protective DevicesVentilators, MechanicalEpiglottisAirIntubationVisual CortexNebulizers and VaporizersNeuronsRetinal Ganglion CellsMaterials TestingPattern Recognition, VisualMicroscopy, Electron, ScanningCross-Over StudiesAirway ManagementImmobilizationSubliminal StimulationPneumonia, AspirationSurface PropertiesContinuous Positive Airway PressureChromatography, Thin LayerInfectious Disease Transmission, Patient-to-Professional