Vascular prosthesis for leak prevention during endovascular aneurysm repair
AssigneesThe Texas A&M University System, Shape Memory Medical, Inc.
InventorsDuncan J. Maitland, Todd L. Landsman, John Horn, Landon Nash, Chung Yeh
Life of this patent
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Abstract
An embodiment includes a process for treating an abdominal aortic aneurysm (AAA) endoleak with a shape memory polymer (SMP) foam device. First, a bifurcated stent graft is placed within the aneurysm while a micro guidewire is positioned within the aneurysm for future catheter access. Second, after placing the iliac graft extension, a catheter is introduced over wire to deliver embolic foams. Third, embolic foams expand and conform to the aneurysm wall. Fourth, embolic foams create a stable thrombus to prevent endoleak formation by isolating peripheral vessels from the aneurysm volume.
Claims15
A system comprising:
- a conduit that simultaneously has disposed within the conduit:
- (a) a first open-cell, polyurethane, thermoset, shape memory polymer (SMP) foam;
- (b) a second open-cell, polyurethane, thermoset, SMP foam;
- and (c) a third open-cell, polyurethane, thermoset, SMP foam;
- and
- a first metal structure coupled to the first SMP foam, a second metal structure coupled to the second SMP foam, and a third metal structure coupled to the third SMP foam;
- wherein (a)(i) a first plane, orthogonal to a long axis of the first SMP foam, intersects both a proximal third of the first SMP foam and the first metal structure;
- (a)(ii) the first metal structure does not extend to middle or distal thirds of the first SMP foam, (b)(i) a second plane, orthogonal to a long axis of the second SMP foam, intersects both a proximal third of the second SMP foam and the second metal structure;
- (b)(ii) the second metal structure does not extend to middle or distal thirds of the second SMP foam, (c)(i) a third plane, orthogonal to a long axis of the third SMP foam, intersects both a proximal third of the third SMP foam and the third metal structure;
- (c)(ii) the third metal structure does not extend to middle or distal thirds of the third SMP foam;
- wherein (a) the first, second, and third SMP foams are not fixedly coupled to each other;
- (b) the first, second, and third SMP foams are arranged serially with respect to each other, and (c) the second SMP foam is between the first and third SMP foams;
- wherein (a) the first SMP foam, in an unexpanded state, is between 0 and 5 mm in diameter measured orthogonal to the long axis of the first SMP foam, (b) the second SMP foam, in an unexpanded state, is between 0 and 5 mm in diameter measured orthogonal to the long axis of the second SMP foam, and (c) the third SMP foam, in an unexpanded state, is between 0 and 5 mm in diameter measured orthogonal to the long axis of the third SMP foam.
Dependencies are inferred from the claim text.