Airway ObstructionIntestinal ObstructionAirway ResistanceUreteral ObstructionLung Diseases, ObstructiveForced Expiratory VolumeAsthmaRespiratory Function TestsSpirometryLaryngeal DiseasesAirway RemodelingVital CapacityTracheal StenosisBronchiNasal ObstructionLungBronchial DiseasesBronchitisRespiratory SystemBronchial HyperreactivityPierre Robin SyndromeDuodenal ObstructionMaximal Expiratory Flow-Volume CurvesPlethysmography, Whole BodyBronchoscopyPulmonary VentilationBronchoconstrictionUrinary Bladder Neck ObstructionBronchial Provocation TestsBronchodilator AgentsUrethral ObstructionTracheal DiseasesPulmonary Disease, Chronic ObstructiveGastric Outlet ObstructionRespiratory MechanicsTotal Lung CapacityVentricular Outflow ObstructionTracheotomyLaryngostenosisResidual VolumeDyspneaRespiratory MucosaIntubation, IntratrachealLung Volume MeasurementsPeak Expiratory Flow RateHeliumLarynxRespiratory HypersensitivityForced Expiratory Flow RatesAlbuterolLaryngeal EdemaMaximal Expiratory Flow RateCoughBronchoalveolar Lavage FluidAdministration, InhalationRespiratory SoundsPulmonary EmphysemaFunctional Residual CapacityLacrimal Duct ObstructionSeverity of Illness IndexAerosolsTracheostomyEpiglottisRespirationTracheal NeoplasmsTreatment OutcomeLaryngeal MasksMucusInhalationHorse DiseasesHigh-Frequency Jet VentilationBronchial SpasmAirway ManagementSleep Apnea, ObstructivePharynxSleep Apnea SyndromesTongue DiseasesTomography, X-Ray ComputedLaryngoceleSmokingAir PressureBronchographyRespiratory Tract DiseasesAtropine DerivativesFiber Optic TechnologyPlethysmographyTime FactorsRespiration DisordersLaryngoscopyContinuous Positive Airway PressureCroupEosinophilsAuscultationMaximal Midexpiratory Flow RateIpratropiumLung DiseasesSputumHypopharynxLaryngismusLung Compliance