Acute Lower Extremity Deep Vein Thrombosis In Infeiror Vena Cava Filter Ultrasonic Evaluation Atfer Placement

Objective: Application of color doppler ultrasound measure of acute lowerextremity deep vein thrombosis (DVT) formation in patients with inferior vena cavafilter (IVCF) in treatment of lower extremity deep vein thrombosis,and vascularparameters before and after the analysis of the change of the before and aftertreatment,and observe the location of the IVCF,shape and internal blood flowingsituation,to explore color doppler ultrasound in patients with acute DVT of lowerextremities after IVCF placement of the clinical application value.Methods：Choose30cases of patients with acute lower limb DVT line IVCFplacement:onset time in2weeks,is shown as: on ultrasonic lumen diameter significantlybroadening,see thrombus echo,and the anechoic or extremely low echo,the boundaryformation,thrombosis and the tube wall boundariers clear,probe pressurized lumencannot be closed;Color doppler ultrasound check the thrombus parts no blood flowsignals,not blood clots wall thickening.Treatment:1, anticoagulation and thrombolysistherapy15days using heparin,warfarin anticoagulation therapy,using urokinasesysnytemic thrombolysis.2,IVCF surgery using the Braun type permanent IVCFVenatech cmpany(Venatech Low Profile),and X-ray guided percutaneous puncture ofinferior vena cava filter placement.Using two-dimenonal ultrasonic measuring stockshallow,popliteal vein diameter before and after the treatment,cross-sectional area andvascular thrombus cross-sectional area ratio (vte); With color doppler flow imaging andpulsed doppler measurement before and after treatment stock shallow, popliteal veincolor blood flow cross section area and vascular cross-sectional area ratio than(perfusion) and peak flow rate changes,we compare the parameters before and aftertreatment. For all limb before and after treatment with large side and health side,legsweeks diameter measured respectively, and observation of the IVCF in location, shapeand internal blood flowing. Results: Treatment of shallow patients after femoral, popliteal venous lumendiameter significantly narrowed, thromboembolism ratio decreases, and peak flow rateincreases, blood perfusion ration increases,all parameters are statisticallysignificant(p<0.01).All IVCF ultrasound image can clear display,long axis plane IVCFin the trunk of inferior vena cava lumen inside densely arranged parallel linear, strongecho showed round or oval cut short axis, attached to inside of the vein wall, the headand tail ends filter spindle bulle shaped. Of a CDFI showed blood flow signals fromwithin the filter through, around the IVCF and distal thrombosis, PW: normal internalblood flow frequency spectrum form, flow velocity of the normal range.Conclusions：In patients with acute DVT of lower extremities after IVCFplacement lumen diameter, thromboembolism ratio, blood flow perfusion ratio andflow velocity change can reflect the thrombolytic efficacy, and ultrasound can clearlyshow the location of the IVCF, shape, internal blood flow and flow velocity measuredvalue. Color doppler flow imaging(cdfi) in patients with acute DVT of lowerextremities IVCF placement has important clinical application value, can be as thepreferred examination method.