Femoral VeinVeinsSaphenous VeinPopliteal VeinIliac VeinVaricose VeinsPortal VeinVenous InsufficiencyPhlebographyVenous ValvesJugular VeinsVenous ThrombosisUltrasonography, Doppler, DuplexPulmonary VeinsMesenteric VeinsThighCatheterization, PeripheralLegThrombophlebitisFemoral ArterySubclavian VeinHepatic VeinsVena Cava, InferiorVascular MalformationsVascular PatencyCatheterization, Central VenousRenal VeinsVenous PressureVascular Surgical ProceduresUmbilical VeinsArteriovenous Shunt, SurgicalVascular GraftingVaricose UlcerVena Cava FiltersCatheters, IndwellingVascular NeoplasmsLower ExtremityThrombosisPulmonary EmbolismDogsTime FactorsBlood Flow VelocityMedial Collateral Ligament, KneePhlebotomySplenic VeinCatheterizationBlood Vessel ProsthesisRegional Blood FlowCadaverCardiac CatheterizationDissectionTreatment OutcomeCerebral VeinsUltrasonography, Doppler, ColorBandagesConstriction, PathologicCentral Venous PressurePostthrombotic SyndromeLigationRetinal VeinGraft Occlusion, VascularPolytetrafluoroethyleneAzygos VeinBrachiocephalic VeinsBlood Vessel Prosthesis ImplantationPolyethylene TerephthalatesAnastomosis, SurgicalGravity SuitsSaccharumAxillary Vein