Airway ObstructionAirway ResistanceIntestinal ObstructionLung Diseases, ObstructiveRespiratory SystemAsthmaForced Expiratory VolumeBronchiUreteral ObstructionRespiratory Function TestsNasal ObstructionLungSpirometryBronchitisVital CapacityLaryngeal DiseasesAirway RemodelingTracheal StenosisBronchial HyperreactivityBronchoalveolar Lavage FluidRhinitisBronchial Provocation TestsBronchoconstrictionBronchial DiseasesRespiratory MucosaOropharynxRhinitis, Allergic, PerennialPulmonary Disease, Chronic ObstructiveRespiratory MechanicsCoughPierre Robin SyndromeSputumDuodenal ObstructionNeuroleptanalgesiaAdministration, InhalationPlethysmography, Whole BodyMaximal Expiratory Flow-Volume CurvesBronchoscopyNosePeak Expiratory Flow RateAerosolsPulmonary VentilationNasal LavageNasal Provocation TestsUrinary Bladder Neck ObstructionUrethral ObstructionTracheal DiseasesBreath TestsBronchodilator AgentsCystic FibrosisRhinovirusGastric Outlet ObstructionTracheaPicornaviridae InfectionsTotal Lung CapacityRhinitis, Allergic, SeasonalVentricular Outflow ObstructionRespirationTracheotomyLaryngostenosisResidual VolumeSinusitisNasal Lavage FluidIntubation, IntratrachealHeliumLung Volume MeasurementsEosinophilsMethacholine ChlorideNasal MucosaLarynxRespiratory Tract DiseasesForced Expiratory Flow RatesDyspneaLaryngeal EdemaAlbuterolAllergensMaximal Expiratory Flow RateRespiratory HypersensitivityNasal CavityPulmonary EmphysemaHistamineFunctional Residual CapacityTracheostomyLacrimal Duct ObstructionEpiglottisSmokingTracheal NeoplasmsTurbinatesLaryngeal MasksInhalationHorse DiseasesMucusDustHigh-Frequency Jet VentilationNebulizers and VaporizersBronchial SpasmAirway ManagementRespiratory SoundsPneumoniaParanasal Sinuses