Fenestrated Venous Endograft

University of Rochester
posted on 10/13/2011

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A novel stent for the treatment of chronic venous stenoses or recannulated occlusions of large veins.

This technology offers a novel approach to tackling problems inherent in current commercially available stents that are used to treat stenoses or recannulated occlusions of the venous system. The fenestrated venous endo-graft illustrated in this invention uses stent-graft technology to facilitate stenting across the venous confluences.

Deep venous thrombosis (DVT) is the most common cause of venous outflow obstruction. Venous outflow obstruction of the iliac vein can be either acute or chronic and can result in severe clinical symptoms. Patients with DVT typically have incomplete recanalization of the thrombosed veins and inadequate collateral circulation. Catheter-directed thrombolysis and percutaneous mechanical thrombectomy (PMT) have proven to be effective therapies to treat DVT. However, venous outflow obstruction of the lower extremity may involve the entire venous system, and the above mentioned techniques are only most effective when treating thrombosis in the largest veins. This invention is aimed at improving the ease of performing inverted Y fenestrated stenting of the iliocaval confluence in chronically obstructed patients. This device is easier to deploy than current techniques, it avoids creating fenestration through the stent, it helps avoid recurrent stenosis due to understenting, and it allows for unimpeded flow from the contralateral side. This technology will be used for the treatment of chronic venous stenoses or recannulated occlusions of large veins in the central venous system.