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The first part of the color Doppler ultrasound and DSA comparative evaluation of the different segments of the purpose of deep venous thrombosis deep venous thrombosis in clinical frequently occurring, ultrasound has become the preferred method of examination exploratory vein thrombosis. This study by two-dimensional and color Doppler imaging (CDFI) probing the veins of the lower extremities of each segment, compared with digital subtraction angiography (DSA), aims to analyze, evaluate ultrasound on different segments of lower extremity deep vein thrombosis diagnosis value. 2003-2006 treatment Tangdu Hospital, clinical suspicious for deep vein thrombosis (DVT) in 58 patients, showed varying degrees of limb swelling history, intermittent or persistent pain, limping. Application the CDFI Profiler limb observation of each segment of vein image, measure and record the the affected vein diameter, thrombus formation range, morphology and blood flow, all patients underwent DSA examination. CDFI findings with the gold standard DSA statistical control of various segments of blood vessels in accordance with the fourfold table analysis, evaluation CDFI in the diagnosis of the different segments of the lower extremity venous thrombosis, the sensitivity, specificity, accuracy, false positive rate, false negative rate indicators. Results of exploration of a total of 196 different segments of 58 patients with DVT of lower extremity venous blood vessels. DSA detected 150 lesion; CDFI 143 detected lesion. Statistics fourfold table analysis vessel detection rate of each segment are as follows: 82.6% of the common iliac vein thrombosis check the sensitivity, specificity of 66.7%, an accuracy rate of 78.1%; external iliac vein thrombosis sensitivity 83.3%, specificity 80.0%, the correct rate of 82.4 %; iliac vein thrombosis sensitivity 80.0%, specificity of 66.7%, 76.9% accuracy rate; popliteal vein thrombosis sensitivity 92.6%, specificity 92.9%, accuracy 92.7%; femoral vein thrombosis sensitivity 96.9%, specificity of 93.8%, the correct rate of 95.3%; small saphenous vein thrombosis sensitivity 81.8%, specificity 75.0%, an accuracy rate of 80.0%; saphenous vein thrombosis sensitivity 88.2%, specificity of 75%, the correct rate of 85.7%; anterior tibial vein thrombosis sensitivity 71.4%, specificity of 75 %, the correct rate of 72.7%; posterior tibial vein thrombosis sensitivity 72.7%, specificity of 75% and an accuracy rate of 73.3%; were detected in 8 of collateral circulation blood vessel detection sensitivity 82.5%, specificity 75.0%, the correct rate of 83.3% . Conclusion CDFI preferred method of examination as deep vein thrombosis, deep vein thrombosis of the different segments of the formation has a different sensitivity and detection rate for femoral, popliteal, and iliac vein high sensitivity, tibialis anterior, posterior tibial vein and side branched vascular sensitivity is low. The second part of the ultrasound image of deep vein thrombosis were followed up by deep vein thrombosis (DVT) inferior vena cava filters and stent implantation in patients involved in the comprehensive treatment purpose, to explore two-dimensional and CDFI in patients with DVT formation intervention in the comprehensive treatment of the application. Formed on 17 patients with suspected DVT underwent preoperative method of preoperative ultrasound diagnosis and assessment of each patient preoperative routine exploration of the inferior vena cava, renal vein, iliac vein, femoral vein, to observe whether the deformity, variability and blood flow patency. After receiving angiography parallel inferior vena cava filters and stent implantation CDFI ultrasound reexamination after the observation filter and bracket position, shape, and smooth flow situation. 1.17 cases were confirmed by DSA underwent interventional treatment, 12 patients received inferior vena cava filter placement, intravenous stent implantation in a total of 10 cases. Five patients at the same time accept the filter and stent implantation. 2 all metal graft ultrasound images can be clearly displayed. Two-dimensional ultrasound imaging long axis view shows the stent and filter trunk showed the vein lumen continuous punctate hyperechoic, densely arranged in parallel, linear, short axis cut surface, round or oval, attached to the inside of the vein wall , filter head and tail ends fusiform bullet-shaped. Probe gently pressurized the visible stent slightly deformed, with good playing sexy. CDFI showed that the blood flow through the stent, filling good. DSA showed good the stent metal echo shaping opacification. 3. 1-3 days after review of 12 are shaping filter, blood flow is usually two filters were captured after 1 week and June thrombotic occlusion of the lumen. 10 stents were shaping well, blood flow, a left common iliac vein stent at 1 year after surgery, the patient appeared limb swelling and other acute symptoms of thrombosis, stent and where the vein lumen were seen intensive review the ultrasound see solid thrombosis echo secondary for stent thrombosis formation. Three patients were confirmed by DSA angiography, again line thrombectomy. Conclusion after Intervention patients, the results of the ultrasound probe for clinical clear guidance, timely stent migration, adverse shaping and prone to complications of interventional treatment secondary to stent thrombosis. Color Doppler ultrasound for non-invasive, convenient, inexpensive, reusable checks as the preferred screening method for follow-up after the DVT interventional treatment.
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