HematomaHematoma, Epidural, CranialHematoma, SubduralHematoma, Subdural, ChronicHematoma, Subdural, AcuteHematoma, Epidural, SpinalHematoma, Subdural, IntracranialInjectionsHematoma, Subdural, SpinalCerebral HemorrhageTrephiningTomography, X-Ray ComputedCraniotomyInjections, IntravenousInjections, IntramuscularSubdural SpaceInjections, IntralesionalInjections, SubcutaneousSkull FracturesInjections, Intra-ArticularCerebral Hemorrhage, TraumaticInjections, IntraperitonealDura MaterBasal Ganglia HemorrhageCraniocerebral TraumaGlasgow Coma ScaleNeurosurgical ProceduresRectus AbdominisTreatment OutcomeMagnetic Resonance ImagingInjections, IntraventricularTime FactorsInjections, Intra-ArterialIntracranial HemorrhagesHead Injuries, ClosedInjections, IntradermalInjections, EpiduralSubdural EffusionCranial Fossa, PosteriorDrainageLaminectomyRemission, SpontaneousSuctionIntravitreal InjectionsInjections, SpinalLigamentum FlavumRetroperitoneal SpaceIntracranial Hemorrhage, HypertensiveInjections, JetCerebral AngiographyEsophageal DiseasesRetrospective StudiesInjections, IntraocularAnticoagulantsPostoperative ComplicationsExtravasation of Diagnostic and Therapeutic MaterialsArachnoid CystsDecompression, SurgicalBrain Hemorrhage, TraumaticAcute DiseaseBrain EdemaWounds, NonpenetratingRats, Sprague-DawleySubarachnoid HemorrhageRupture, SpontaneousOrbital DiseasesFatal OutcomeGlasgow Outcome ScaleSpinal Cord CompressionDisease Models, AnimalTomography Scanners, X-Ray ComputedArachnoidStereotaxic TechniquesFlow Injection AnalysisMicroinjectionsBrainAortic DiseasesProspective StudiesNeedlesCerebellar DiseasesAneurysm, RupturedWarfarinNeuroendoscopyParaparesisExophthalmosEpidural SpaceSubstance Abuse, IntravenousThalamic DiseasesSperm Injections, IntracytoplasmicDose-Response Relationship, DrugBrain InjuriesHeadacheHemostatic TechniquesNeurosurgeryIntracranial AneurysmHemorrhageSyringesPostoperative HemorrhageMice, Inbred C57BLAneurysm, Dissecting