Intermittent Pneumatic Compression DevicesGravity SuitsPopliteal VeinBandagesStockings, CompressionPressureVenous ThrombosisFemoral VeinLegFootVenous ThromboembolismHeparin, Low-Molecular-WeightUltrasonography, Doppler, DuplexBlood Flow VelocityEquipment and SuppliesTreatment OutcomeIntermittent ClaudicationPopliteal ArteryPulmonary EmbolismLymphedemaSphygmomanometersVenous PressureEsophageal AchalasiaVenous InsufficiencyRegional Blood FlowThrombophlebitis