Erythrocyte TransfusionBlood TransfusionBlood Transfusion, IntrauterineBlood Component TransfusionPlatelet TransfusionBlood Transfusion, AutologousAnemiaCerebrovascular CirculationCerebral ArteriesExchange Transfusion, Whole BloodCerebral InfarctionTreatment OutcomeBrainMiddle Cerebral ArteryFetofetal TransfusionCerebral PalsyBrain IschemiaInfarction, Middle Cerebral ArteryCerebral AngiographyIntracranial PressureCerebral VeinsCarbon DioxideBlood Loss, SurgicalMalaria, CerebralBlood Flow VelocityCerebral HemorrhageBlood Grouping and CrossmatchingSubarachnoid HemorrhageVasospasm, IntracranialLeukocyte TransfusionBlood BanksHemoglobinsIschemic Attack, TransientPia MaterOxygenBlood DonorsBlood PressureSpectroscopy, Near-InfraredXenon RadioisotopesOxygen ConsumptionBlood PreservationTime FactorsNimodipineBrain EdemaBlood Group IncompatibilityHemodilutionCerebrumUltrasonography, Doppler, TranscranialAnemia, NeonatalMagnetic Resonance ImagingBlood VolumeErythroblastosis, FetalPartial PressureHypoxia, BrainAcetazolamidePlateletpheresisCerebrovascular DisordersHypercapniaHypocapniaPostoperative HemorrhageBasilar ArteryRetrospective StudiesOperative Blood SalvageIsoantibodiesHyperventilationXenonNeuroprotective AgentsBemegrideIntracranial HypertensionProspective StudiesHemodynamicsRegional Blood FlowIntracranial Embolism and ThrombosisArteriolesDisease Models, AnimalInfant, NewbornBlood SubstitutesRats, Sprague-DawleyBlood Gas AnalysisPapioHypothermia, InducedCardiopulmonary BypassAntifibrinolytic AgentsTranexamic AcidHomeostasisAnterior Cerebral ArteryStrokeIntraoperative CareIntracranial AneurysmBrain DiseasesBlood-Brain BarrierCerebral Amyloid AngiopathyReperfusionElectroencephalographyBlood SafetyPosterior Cerebral ArteryBrain ChemistryBrain InjuriesFetomaternal TransfusionCerebral Ventricles