PlethysmographyPlethysmography, Whole BodyPlethysmography, ImpedanceForearmRegional Blood FlowLegomega-N-MethylarginineVasodilationNitroprussideAirway ResistanceLung Volume MeasurementsThoraxRespiratory MechanicsVeinsRespirationHyperemiaVasodilator AgentsTidal VolumeTotal Lung CapacityVascular ResistanceThoracic WallPulmonary VentilationVenous PressureInfusions, Intra-ArterialMethacholine ChlorideHand-Arm Vibration SyndromeFunctional Residual CapacityVenous InsufficiencyVascular CapacitancePostphlebitic SyndromeAcetylcholineBlood PressureRespiratory Function TestsBlood Flow VelocityEndothelium, VascularPhlebographyThrombophlebitisBrachial ArteryHeart RateHemodynamicsBronchoconstrictor AgentsAirway ObstructionSpirometryFluid ShiftsVasoconstrictionAirPopliteal VeinResidual VolumeLungPostureLower Body Negative PressureApneaInhalationCross-Over StudiesBlood VolumeHeliumFemoral VeinVasomotor SystemHypercapniaRaynaud DiseaseVasoconstrictor AgentsNitric OxideSupine PositionNitroglycerinSkin TemperatureVaricose VeinsOscillometryReproducibility of ResultsFingersRespiratory MusclesComplianceBronchoconstrictionDose-Response Relationship, DrugCentral Venous PressureVaricose UlcerAnalysis of VarianceGravity SuitsSympathetic Nervous SystemAnoxiaDouble-Blind MethodReference ValuesBlood CirculationInjections, Intra-ArterialRespiratory RateAbdomenPhotoplethysmographyForced Expiratory VolumeTilt-Table TestDiaphragmBody CompositionHypertensionTourniquetsForced Expiratory Flow RatesUltrasonography, Doppler, DuplexNorepinephrineIliac VeinAlbuterolTime FactorsVital CapacityArteries