Venous PressureCentral Venous PressurePressureStomach UlcerDuodenal UlcerBlood PressurePeptic UlcerLeg UlcerPressure UlcerSkin UlcerPortal PressureHydrostatic PressurePeptic Ulcer HemorrhageBlood Pressure DeterminationHemodynamicsTransducers, PressureHypertension, PortalCapillary ResistancePeptic Ulcer PerforationIntracranial PressureBuruli UlcerJugular VeinsVascular ResistanceHeart RateIntraocular PressureRegional Blood FlowVeinsVenous InsufficiencyCardiac OutputHypertensionPulmonary Wedge PressureDogsBlood VolumeHepatic VeinsArterial PressureLiver CirculationVascular CapacitanceBlood Pressure Monitoring, AmbulatoryPlethysmographyPlasma SubstitutesLower Body Negative PressureAir PressureFluid TherapyAtmospheric PressureTime FactorsPortal VeinPostureMonitoring, IntraoperativeHypovolemiaCerebrospinal Fluid PressureSplanchnic CirculationLiver CirrhosisTourniquetsSympathetic Nervous SystemLegEsophageal and Gastric VaricesBlood CirculationProspective StudiesVentricular PressureDiabetic FootPressoreceptorsAntihypertensive AgentsSupine PositionPortal SystemMonitoring, PhysiologicGastrointestinal HemorrhageHypotensionBlood Flow VelocityVagotomyHydroxyethyl Starch DerivativesHead-Down TiltFemoral VeinOsmotic PressureTreatment OutcomeAnesthesiaVaricose VeinsAnti-Ulcer AgentsCompliancePositive-Pressure RespirationHelicobacter pyloriIsotonic SolutionsReflexScleraAnesthesia, GeneralBaroreflexDiastoleFootHelicobacter InfectionsOxygenPopliteal VeinHeartConstrictionVena Cava, SuperiorVaricose UlcerColloidsRespirationVena Cava, InferiorModels, CardiovascularEmbolism, AirForearm