Airway ObstructionLaryngeal DiseasesGastrointestinal HemorrhagePierre Robin SyndromeAirway ResistanceMelenaHematemesisTracheal StenosisTracheotomyLaryngeal EdemaPharynxLaryngostenosisSleep Apnea, ObstructiveLarynxSleep Apnea SyndromesHypopharynxAir PressurePulmonary VentilationRespiratory MechanicsHigh-Frequency Jet VentilationIntestinal ObstructionCroupTracheostomyTongue DiseasesLung Diseases, ObstructiveTracheal DiseasesPolysomnographyDuodenal DiseasesLudwig's AnginaGoiter, SubsternalHeliumVentilators, Negative-PressureFailure to ThriveOropharynxRespiratory Function TestsRespiratory SystemTracheal NeoplasmsSnoringMallory-Weiss SyndromeIntubation, IntratrachealUpper Gastrointestinal TractRespiratory MusclesEsophageal DiseasesUvulaAdenoidsAcute DiseaseRespirationUreteral ObstructionRespiratory Tract InfectionsEndoscopy, GastrointestinalArytenoid CartilageSleepEndoscopyFiber Optic TechnologyLaryngoscopyForced Expiratory VolumeHemostasis, EndoscopicForced Expiratory Flow RatesComfreyStomach DiseasesAsthmaApneaNasal ObstructionSleep StagesTracheaAdenoidectomyVocal CordsSpirometryPeptic Ulcer HemorrhageTonsillectomyPalate, SoftEmbolectomyEpiglottisWork of BreathingContinuous Positive Airway PressurePharyngeal MusclesVocal Cord ParalysisAirway RemodelingVital CapacityTongueBronchiLungArrhythmia, SinusInhalationEndoscopy, Digestive SystemMaximal Expiratory Flow-Volume CurvesEsophageal and Gastric VaricesRespiratory Physiological PhenomenaAnesthetics, IntravenousPositive-Pressure RespirationElectromyographyBronchial DiseasesPlethysmography, Whole BodyTreatment OutcomeBronchoscopyBronchitisDuodenal ObstructionBronchial HyperreactivityLung Volume MeasurementsBronchoconstriction