Branch Vessel Graft Design and Deployment Method
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Abstract
A branch graft stent system includes a tubular primary graft having a branch graft opening which when deployed is located in alignment with a side branch vessel emanating from the primary vessel in which a branch graft is deployed. A connector (flange) member forms a perimeter of the branch graft opening and is constructed so that the connector member is substantially flush with the wall of the tubular primary graft. The tubular branch graft has a first expandable ring and a second expandable ring spaced apart from each other as part of a connection section located at a proximal end of the tubular branch graft. The first expandable ring, the second expandable ring, and graft or other material spaced between the first expandable ring and the second expandable ring when engaged with the perimeter of the branch graft opening of the primary graft, the assembly forms a flexible sealed connection between the primary graft and branch graft lumens to continue to exclude the aneurysm while providing a conduit for blood flow to the branch vessel. A distal end of the branch graft can be anchored by a balloon expandable or a self-expanding stent to the wall of the branch vessel beyond the aneurysm.
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Citations
34 Claims
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1-14. -14. (canceled)
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15. A branch graft delivery system comprising:
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a branch graft disposed on a delivery catheter, said delivery catheter having a sheath surrounding a seal portion of said branch graft;
wherein said seal portion of said branch graft includes a first circumferential graft pocket having a first self expanding support ring contained therein and a second circumferential graft pocket having a second self expanding support ring contained therein, wherein said first circumferential graft pocket and said second circumferential graft pocket circumferentially encircle said branch graft at first and second locations, respectively, wherein said first and second locations are spaced from each other by a cylindrical channel seal forming section, wherein an outer member of said delivery catheter includes a first ring stop and a second ring stop which extend laterally outward from said outer member to a diameter slightly less than an inner diameter of said sheath, such that annular spaces are enough to provide clearance for the thickness of a graft material to fit through said annular spaces, while preventing said first and second self expanding support rings from passing through said annular spaces, wherein when said sheath is positioned to surround said first ring stop, said first self expanding support ring is prevented from moving towards said second self expanding support ring and when said sheath is positioned to surround said second ring stop, said second self expanding support ring is prevented from moving towards said first self expanding support ring. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28)
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29. A branch graft delivery system for deployment of a branch graft within a substantially flush branch vessel port of a main stent-graft, said branch graft delivery system comprising:
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said branch graft comprising;
a first circumferential graft pocket;
a first self expanding support ring being contained with said first circumferential graft pocket;
a second circumferential graft pocket;
a second self expanding support ring being contained with said second circumferential graft pocket;
a sheath radially constraining said first and second self expanding support rings;
a first ring stop axially constraining said first self expanding support ring; and
a second ring stop axially constraining said second self expanding support ring. - View Dependent Claims (30, 31, 32, 33)
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34. A branch graft delivery system for deployment of a branch graft within a substantially flush branch vessel port of a main stent-graft, said branch graft delivery system comprising:
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said branch graft comprising;
a branch graft material;
a first pocket material sewn to said branch graft material at a first pocket proximal pocket seam and a first pocket distal pocket seam to define a first circumferential graft pocket;
a first self expanding support ring being contained with said first circumferential graft pocket;
a second pocket material sewn to said branch graft material at a second pocket proximal pocket seam and a second pocket distal pocket seam to define a second circumferential graft pocket;
a second self expanding support ring being contained with said second circumferential graft pocket;
a sheath radially constraining said first and second self expanding support rings;
a first ring stop axially constraining said first self expanding support ring; and
a second ring stop axially constraining said second self expanding support ring.
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Specification