Airway ObstructionEndoscopy, GastrointestinalLaryngeal DiseasesPierre Robin SyndromeAirway ResistanceTracheal StenosisTracheotomyLaryngeal EdemaPharynxLaryngostenosisSleep Apnea, ObstructiveLarynxSleep Apnea SyndromesHypopharynxAir PressurePulmonary VentilationRespiratory MechanicsIntestinal ObstructionHigh-Frequency Jet VentilationCroupTongue DiseasesTracheostomyLung Diseases, ObstructiveTracheal DiseasesPolysomnographyLudwig's AnginaGoiter, SubsternalHeliumVentilators, Negative-PressureFailure to ThriveOropharynxRespiratory Function TestsRespiratory SystemTracheal NeoplasmsSnoringIntubation, IntratrachealRespiratory MusclesUvulaAdenoidsRespirationUreteral ObstructionArytenoid CartilageSleepLaryngoscopyForced Expiratory VolumeForced Expiratory Flow RatesAsthmaApneaNasal ObstructionSleep StagesTracheaAdenoidectomyVocal CordsSpirometryTonsillectomyPalate, SoftEpiglottisContinuous Positive Airway PressureWork of BreathingPharyngeal MusclesVocal Cord ParalysisAirway RemodelingVital CapacityTongueBronchiLungArrhythmia, SinusInhalationMaximal Expiratory Flow-Volume CurvesRespiratory Physiological PhenomenaAnesthetics, IntravenousBronchoscopyPositive-Pressure RespirationElectromyographyBronchial DiseasesPlethysmography, Whole BodyBronchitisDuodenal ObstructionBronchial HyperreactivityTomography, X-Ray ComputedLung Volume MeasurementsBronchoconstrictionRespiratory MucosaPulmonary Disease, Chronic ObstructiveOxygenUrethral ObstructionUrinary Bladder Neck ObstructionGlottisBronchial Provocation TestsBronchodilator AgentsNoseGastric Outlet ObstructionPressureRetrospective StudiesTreatment OutcomeTotal Lung CapacityInfant, NewbornExhalationVentricular Outflow ObstructionDyspnea