Microfluidic Analytical TechniquesRegional Blood FlowArteriolesBlood Flow VelocityVasodilationFlow CytometryPulsatile FlowGene FlowCerebrovascular CirculationCoronary CirculationRheologyOptic FlowLaser-Doppler FlowmetryFlow Injection AnalysisPeak Expiratory Flow RateVascular ResistanceBlood PressureMicrospheresBlood CirculationModels, CardiovascularTime FactorsHemorheologyMicrocirculationHydrodynamicsUltrasonography, Doppler, ColorXenon RadioisotopesPulmonary CirculationUltrasonography, DopplerCollateral CirculationLiver CirculationStress, MechanicalOxygenPerfusionCardiac OutputRenal CirculationOxygen ConsumptionCoronary VesselsCarbon DioxideArteriesPressureReproducibility of ResultsHeart RateBlood VolumeTomography, Emission-ComputedSplanchnic CirculationVasodilator AgentsModels, BiologicalWater MovementsBrainMicrofluidicsEquipment DesignShear StrengthEndothelium, VascularOxygen RadioisotopesMaximal Expiratory Flow RateSensitivity and SpecificityCerebral ArteriesPlethysmographyUltrasonography, Doppler, TranscranialEchocardiography, Doppler