Residual VolumePlethysmographyPlethysmography, Whole BodyPlethysmography, ImpedanceTotal Lung CapacityLung Volume MeasurementsFunctional Residual CapacityForearmRespiratory Function TestsVital CapacityRespiratory MechanicsForced Expiratory VolumePulmonary EmphysemaCognitive ReserveLungRegional Blood FlowSpirometryBlood VolumeAirway ResistanceVenous InsufficiencyPulmonary Diffusing CapacityLung ComplianceRespirationRespiratory AspirationPulmonary VentilationGallbladder EmptyingBronchoconstrictor AgentsInhalationMethacholine ChlorideUrodynamicsEnteral NutritionUrinationGastric EmptyingTime FactorsIntubation, GastrointestinalFractional Flow Reserve, MyocardialNeoplasm, ResidualRespiratory MusclesReproducibility of ResultsPressureDiaphragmUrinary RetentionExpiratory Reserve VolumeHeliumLegVasodilationHyperemiaAirway ObstructionPneumonectomyProspective StudiesTreatment OutcomePulmonary Disease, Chronic ObstructiveForced Expiratory Flow Ratesomega-N-MethylarginineThoraxNitroprussideVasodilator AgentsGastrointestinal ContentsUrinary BladderEmphysemaRespiratory Physiological PhenomenaDyspneaBlood Flow VelocityLung Diseases, ObstructiveAnalysis of VarianceVeinsUrinary Bladder DiseasesReference ValuesBlood PressureMaximal Expiratory Flow RateVascular ResistanceBronchodilator AgentsSeverity of Illness IndexCross-Over StudiesHemodynamicsFollow-Up StudiesUrination DisordersStroke VolumeTidal VolumeTomography, X-Ray ComputedThoracic WallCoronary CirculationStatistics, NonparametricVenous PressureDouble-Blind MethodInfusions, Intra-ArterialHeart RateUrinary Bladder Neck ObstructionExercise TestHand-Arm Vibration SyndromeSensitivity and SpecificityProstatic HyperplasiaRetrospective StudiesVascular CapacitanceAcetylcholinePlasma VolumeCritical IllnessChronic DiseaseAsthmaAdministration, Inhalation