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  • Title: Ultrasound-accelerated catheter-directed thrombolysis in acute iliofemoral deep venous thrombosis.
    Author: Strijkers RH, Grommes J, Arnoldussen CW, de Graaf R, Ten Cate AJ, Wittens CH.
    Journal: J Vasc Surg Venous Lymphat Disord; 2013 Jul; 1(3):225-30. PubMed ID: 26992579.
    Abstract:
    BACKGROUND: Iliofemoral deep venous thrombosis (DVT) is associated with a high incidence of the post-thrombotic syndrome. The current CHEST guidelines suggest that catheter-directed thrombolysis can be used for patients with acute iliofemoral DVT and severe leg complaints. Current literature shows that catheter-directed thrombolysis increases patency of the affected tract and may reduce post-thrombotic complications, but treatment time and bleeding complications are high. Ultrasound-accelerated catheter-directed thrombolysis (UACDT) uses ultrasound waves to enhance clot lysis, which should lower treatment time and bleeding complications with the same or higher patency rates. We report our clinical experience with UACDT on patency and complications in patients with acute iliofemoral DVT. METHODS: Patients treated with UACDT for acute iliofemoral DVT were included in our analyses. Diagnosis of iliofemoral DVT was confirmed using duplex sonography and magnetic resonance venography. In addition to thrombolysis, stents were placed or an arteriovenous fistula was created to ensure patency of the treated vein, if indicated. The main outcome is patency after 1 year. Secondary outcome measures are treatment time, bleeding complications, and pulmonary embolism. Patency was assessed using duplex sonography. RESULTS: In total, 37 patients (average age at intervention, 42 years; range, 5-76 years) were included. The DVT location was unilateral in 33 patients (20 left side, 13 right side), and four were bilateral. The average treatment time was 43 ±17 hours. The success rate of thrombolysis was 95% (n = 35); re-thrombosis occurred in 11 (30%) patients. Major bleeding occurred in one patient (3%), and three minor bleedings occurred at the insertion side of the catheter (8%). One pulmonary embolism was encountered (3%). One patient had fever with positive blood cultures for Staphylococcus aureus. Additional procedures were required in 54% (n = 20) of patients. Primary patency was 70% at 1 year; secondary patency was 87% after 1-year follow up. CONCLUSIONS: UACDT of acute iliofemoral DVT is feasible and safe. Supplementary percutaneous transluminal angioplasty and stenting play an important role in preventing re-thrombosis.
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