MasksLaryngeal MasksRespiratory Protective DevicesIntubation, IntratrachealPerceptual MaskingAir PressureManikinsEquipment DesignFiber Optic TechnologyDisposable EquipmentAnesthesia, GeneralPositive-Pressure RespirationLaryngoscopyRespiration, ArtificialAirway ObstructionCricoid CartilageRespiratory InsufficiencyDramaAnesthesia, InhalationTidal VolumeOxygen Inhalation TherapyInhalation SpacersProtective ClothingContrast SensitivitySensory ThresholdsNoninvasive VentilationPharyngitisLaryngismusAerosolsPsychophysicsLarynxPressureNeuromuscular BlockadeIntermittent Positive-Pressure VentilationEye Protective DevicesVentilators, MechanicalFiltrationTime FactorsAnesthesiaEpiglottisIntubationNebulizers and VaporizersPhotic StimulationCross-Over StudiesAirway ManagementMolecular Sequence DataPattern Recognition, VisualSubliminal StimulationPneumonia, AspirationImmobilizationContinuous Positive Airway PressureRespirationAirInfectious Disease Transmission, Patient-to-Professional