Airway ObstructionForeign BodiesIntestinal ObstructionAirway ResistanceUreteral ObstructionLung Diseases, ObstructiveForced Expiratory VolumeRespiratory Function TestsAsthmaLaryngeal DiseasesSpirometryAirway RemodelingVital CapacityTracheal StenosisBronchiNasal ObstructionLungBronchial DiseasesRespiratory SystemBronchitisBronchoscopyPierre Robin SyndromeDuodenal ObstructionBronchial HyperreactivityPlethysmography, Whole BodyMaximal Expiratory Flow-Volume CurvesPulmonary VentilationBronchoconstrictionUrinary Bladder Neck ObstructionUrethral ObstructionTracheal DiseasesBronchial Provocation TestsBronchodilator AgentsPulmonary Disease, Chronic ObstructiveGastric Outlet ObstructionRespiratory MechanicsTotal Lung CapacityTracheotomyVentricular Outflow ObstructionLaryngostenosisResidual VolumeLarynxRespiratory MucosaIntubation, IntratrachealHeliumLung Volume MeasurementsPeak Expiratory Flow RateForced Expiratory Flow RatesDyspneaLaryngeal EdemaAlbuterolMaximal Expiratory Flow RateBronchoalveolar Lavage FluidRespiratory HypersensitivityAdministration, InhalationPulmonary EmphysemaTracheostomyFunctional Residual CapacityPharynxLacrimal Duct ObstructionEpiglottisTracheal NeoplasmsAerosolsForeign-Body ReactionRespirationLaryngeal MasksCoughInhalationHorse DiseasesMucusHigh-Frequency Jet VentilationBronchographyBronchial SpasmAirway ManagementRespiratory SoundsSleep Apnea, ObstructiveTongue DiseasesSleep Apnea SyndromesLaryngoceleTomography, X-Ray ComputedFiber Optic TechnologyAir PressureLaryngoscopyCroupHypopharynxAtropine DerivativesSmokingPlethysmographyTracheaContinuous Positive Airway PressureAuscultationEosinophilsIpratropiumTreatment OutcomeLung ComplianceLaryngismusMaximal Midexpiratory Flow RateLung DiseasesRespiratory MusclesSputum