Blood VolumeFetal BloodLead PoisoningLeadMethemoglobinemiaInfant, NewbornBlood PressurePlasma VolumeHypovolemiaPopulation SurveillanceErythrocyte VolumeBirth WeightFetal HemoglobinBlood DonorsCerebrovascular CirculationBlood CellsHematocritImmunophenotypingPlasma SubstitutesFetusMagnetic Resonance ImagingHemodynamicsStroke VolumePregnancyUnited StatesFluid ShiftsHypertensionLung Volume MeasurementsRegional Blood FlowCardiac OutputLeukocytes, MononuclearHematopoietic Stem CellsMonocytesFlow CytometryT-Lymphocyte SubsetsCell DifferentiationAgingPulmonary Diffusing CapacityBrainHemorrhageCells, CulturedHemodilutionBlood CirculationDye Dilution TechniqueContrast MediaBlood Flow VelocityHemoglobinsIsotonic SolutionsHydroxyethyl Starch DerivativesLymphocyte ActivationOxygenSpectroscopy, Near-InfraredAge FactorsShock, HemorrhagicReproducibility of ResultsPerfusion ImagingImage Processing, Computer-AssistedIndocyanine GreenT-LymphocytesPulmonary CirculationMagnetic Resonance AngiographyTime FactorsBlood Volume DeterminationDogsOxygen RadioisotopesVascular CapacitanceGadolinium DTPAOxygen ConsumptionTomography, X-Ray ComputedTomography, Emission-ComputedHypotensionFluid TherapyHeart RateThoraxMicrocirculationVascular ResistanceExchange Transfusion, Whole BloodBrain NeoplasmsPlethysmographyImage Interpretation, Computer-AssistedPolygelineCarbon DioxideSensitivity and SpecificityImage EnhancementSplanchnic CirculationImaging, Three-DimensionalCentral Venous PressureOrgan SizeWater-Electrolyte BalanceIndicator Dilution TechniquesForced Expiratory VolumeAcetazolamideLiver CirculationReference ValuesDiuresisPostureTechnetiumColoring AgentsBrain IschemiaCarbon Monoxide