InjectionsInjections, IntravenousInfusions, IntravenousInjections, SubcutaneousInjections, IntramuscularContrast MediaDose-Response Relationship, DrugTime FactorsInjections, Intra-ArterialInjections, IntralesionalInjections, Intra-ArticularDogsOxygen RadioisotopesBlood PressureInfusions, ParenteralInjections, IntraperitonealMetabolic Clearance RateInjections, IntraventricularRats, Sprague-DawleyInjections, SpinalHemodynamicsHalf-LifeRats, WistarGadolinium DTPAHeart RateAnesthetics, IntravenousTissue DistributionInjections, IntradermalInjections, EpiduralRabbitsDisease Models, AnimalDrug Administration ScheduleBrainRadioactive TracersDrug EvaluationInjections, JetTomography, Emission-ComputedInfusion Pumps, ImplantableCarbon RadioisotopesIntravitreal InjectionsInfusion PumpsPropofolRats, Inbred StrainsCoronary CirculationRegional Blood FlowSulfur HexafluorideIndicator Dilution TechniquesLidocaineRecombinant ProteinsAnesthesiaInjections, IntraocularKidneyIodine RadioisotopesCerebrovascular CirculationFibrinolytic AgentsFentanylVasodilator AgentsTreatment OutcomeTissue Plasminogen ActivatorFurosemideRadiopharmaceuticalsOrganometallic CompoundsModels, BiologicalSheepBlood VolumeKineticsVascular ResistanceDouble-Blind MethodPhenylephrineLiverHyperemiaBlood-Brain BarrierVasoconstrictor AgentsFlow Injection AnalysisCross-Over StudiesHeartAnalgesics, OpioidDeglutitionNortropanesMicroinjectionsAdenosineNorepinephrineMice, Inbred C57BLCardiac OutputArea Under CurveBlood Flow VelocityPerfusionFluorouracilFluorine RadioisotopesIndocyanine GreenAnestrusAlfentanilLeucovorinRandom AllocationProspective StudiesPapioConsciousnessAnalysis of VarianceMicrospheresMagnetic Resonance Imaging