Portal VeinPortal SystemVenous ThrombosisHypertension, PortalCarbadoxLiver CirculationMesenteric VeinsThrombosisVeinsPortasystemic Shunt, SurgicalLiverHepatic VeinsHepatic ArterySplenic VeinSplenorenal Shunt, SurgicalPortal PressureBudd-Chiari SyndromeFemoral VeinSaphenous VeinLiver TransplantationLiver CirrhosisVaricose VeinsEmbolism, AirLiver NeoplasmsEsophageal and Gastric VaricesIliac VeinPortacaval Shunt, SurgicalJugular VeinsThrombophlebitisGlucoseSplenectomyCarcinoma, HepatocellularRenal VeinsAnticoagulantsPortographyPhlebographyGastrointestinal HemorrhageTomography, X-Ray ComputedHypersplenismPortasystemic Shunt, Transjugular IntrahepaticPulmonary VeinsVena Cava, InferiorPopliteal VeinUpper Extremity Deep Vein ThrombosisTreatment OutcomeSplanchnic CirculationSubclavian VeinLiver DiseasesHepatectomyUltrasonography, DopplerProtein S DeficiencyChemoembolization, TherapeuticUltrasonography, Doppler, ColorAnastomosis, SurgicalPostoperative ComplicationsRetrospective StudiesDogsUmbilical VeinsSplenomegalyEmbolization, TherapeuticPulmonary EmbolismAngiographyLiving DonorsCerebral VeinsTime FactorsLigationProtein C DeficiencyAscitesAxillary VeinDiagnostic Techniques, SurgicalSclerotherapyRegional Blood FlowTachyphylaxisSinus Thrombosis, IntracranialFollow-Up StudiesIntracranial ThrombosisGasesCoronary ThrombosisProspective StudiesSplenic ArteryUltrasonography, Doppler, DuplexPreoperative CareVenous PressureCoagulation Protein DisordersFibrin Fibrinogen Degradation ProductsHepatic EncephalopathyHeparin, Low-Molecular-WeightMuscle, Smooth, VascularInfusions, Intravenous