Airway ObstructionCell HypoxiaIntestinal ObstructionAirway ResistanceUreteral ObstructionLung Diseases, ObstructiveForced Expiratory VolumeAnoxiaRespiratory Function TestsAsthmaLaryngeal DiseasesSpirometryAirway RemodelingVital CapacityTracheal StenosisBronchiLungNasal ObstructionBronchial DiseasesRespiratory SystemBronchitisPulmonary VentilationPierre Robin SyndromePlethysmography, Whole BodyDuodenal ObstructionBronchial HyperreactivityMaximal Expiratory Flow-Volume CurvesBronchoscopyRespiratory MechanicsBronchoconstrictionUrinary Bladder Neck ObstructionUrethral ObstructionTracheal DiseasesBronchial Provocation TestsBronchodilator AgentsPulmonary Disease, Chronic ObstructiveGastric Outlet ObstructionOxygenHypoxia, BrainTotal Lung CapacityVentricular Outflow ObstructionTracheotomyLaryngostenosisResidual VolumeRespirationRespiratory MucosaIntubation, IntratrachealLung Volume MeasurementsHeliumLarynxPeak Expiratory Flow RateForced Expiratory Flow RatesDyspneaLaryngeal EdemaAlbuterolFetal HypoxiaBronchoalveolar Lavage FluidMaximal Expiratory Flow RateRespiratory HypersensitivityAdministration, InhalationFunctional Residual CapacityPulmonary EmphysemaInhalationTracheostomyLacrimal Duct ObstructionEpiglottisTracheal NeoplasmsAerosolsLaryngeal MasksHorse DiseasesMucusSleep Apnea, ObstructiveSleep Apnea SyndromesHigh-Frequency Jet VentilationBronchial SpasmHypoxia-Inducible Factor 1, alpha SubunitCoughAirway ManagementRespiratory SoundsPharynxAir PressureTongue DiseasesLaryngocelePlethysmographyBronchographyAtropine DerivativesFiber Optic TechnologyCarbon DioxideTomography, X-Ray ComputedTidal VolumeCroupSmokingTime FactorsRespiratory MusclesContinuous Positive Airway PressureLaryngoscopyAuscultationDisease Models, AnimalLung ComplianceEosinophils