HematocritHemodilutionBlood ViscosityErythrocyte CountHemoglobinsPlasma VolumeErythropoietinAnemiaPolycythemiaErythrocyte VolumeBlood VolumeExchange Transfusion, Whole BloodErythrocyte IndicesErythrocytesBloodlettingHematologic TestsHemoglobinometryErythrocyte AggregationBlood Cell CountPlasma SubstitutesIronErythrocyte TransfusionBlood Chemical AnalysisReticulocyte CountOxygenBlood PressureErythropoiesisBlood Volume DeterminationBlood TransfusionHemorheologyBlood ProteinsPhlebotomyRenal DialysisKidney Failure, ChronicTime FactorsAnemia, NeonatalErythrocyte DeformabilityIsotonic SolutionsAltitudeSerum AlbuminDehydrationPlatelet CountAnemia, HypochromicHydroxyethyl Starch DerivativesBlood SubstitutesBody WeightHemodynamicsCapillariesBlood Transfusion, AutologousPolycythemia VeraBlood Flow VelocityFerritinsBlood Loss, SurgicalMicrocirculationEaglesRheologyRecombinant ProteinsReference ValuesCerebrovascular CirculationLeukocyte CountCardiopulmonary BypassBlood Specimen Collection