MasksLaryngeal MasksRespiratory Protective DevicesIntubation, IntratrachealPerceptual MaskingAir PressureManikinsEquipment DesignDisposable EquipmentFiber Optic TechnologyAnesthesia, GeneralPositive-Pressure RespirationLaryngoscopyRespiration, ArtificialCricoid CartilageAirway ObstructionDramaRespiratory InsufficiencyAnesthesia, InhalationProtective ClothingOxygen Inhalation TherapyTidal VolumeInhalation SpacersSensory ThresholdsContrast SensitivityNoninvasive VentilationPharyngitisAerosolsPsychophysicsLaryngismusTime FactorsPressureLarynxNeuromuscular BlockadeEye Protective DevicesIntermittent Positive-Pressure VentilationVentilators, MechanicalAnesthesiaPhotic StimulationEpiglottisNebulizers and VaporizersIntubationPattern Recognition, VisualProspective StudiesSubliminal StimulationPneumonia, AspirationCross-Over StudiesAirway ManagementImmobilizationInfectious Disease Transmission, Patient-to-ProfessionalContinuous Positive Airway Pressure