Stent graft and introducer assembly
First Claim
1. A stent graft system configured for treatment of defects in the ascending aorta with a stent graft, the stent graft comprising a graft tube comprising a tubular portion of graft material, the graft tube provided with proximal and distal ends, the stent graft further comprising a plurality of stent rings attached to the graft tube, a first mechanically releasable diameter-restraining device located at or proximate the proximal end of the graft tube and restraining the proximal end of the graft tube, a second mechanically releasable diameter-restraining device restraining a proximal end of one of the plurality of stent rings located at an intermediate position between two other of the plurality of stent rings located on either side of the at least one of the plurality of stent rings located at the intermediate position, and a third mechanically releasable diameter-restraining device restraining a distal end of one of the plurality of stent rings located at the intermediate position along the graft tube, at least one release mechanism operable to release the second and third mechanically releasable diameter-restraining devices, and a bare stent extending from the proximal end of the graft tube and designed to flare outwardly relative to the graft tube so as to engage in use a cavity of an aortic sinus of a patient, where the stent graft has a first expanded configuration and a second expanded configuration where the stent graft is fully expanded, where in the first expanded configuration the graft tube at the intermediate position has a smaller diameter than adjacent portions of the graft tube.
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0 Petitions
Accused Products
Abstract
A stent graft (40) for treating Type-A dissections in the ascending aorta (22) is provided with a plurality of diameter-reducing suture loops (56-60) operable to constrain the stent graft during deployment thereof in a patient'"'"'s aorta. The diameter-reducing loops (56-60) allow the stent graft (40) to be partially deployed, in such a manner that its location can be precisely adjusted in the patient'"'"'s lumen. In this manner, the stent graft can be placed just by the coronary arteries (26, 28) with confidence that these will not be blocked. The stent graft (40) is also provided with proximal and distal bare stents (44,52) for anchoring purposes.
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Citations
16 Claims
- 1. A stent graft system configured for treatment of defects in the ascending aorta with a stent graft, the stent graft comprising a graft tube comprising a tubular portion of graft material, the graft tube provided with proximal and distal ends, the stent graft further comprising a plurality of stent rings attached to the graft tube, a first mechanically releasable diameter-restraining device located at or proximate the proximal end of the graft tube and restraining the proximal end of the graft tube, a second mechanically releasable diameter-restraining device restraining a proximal end of one of the plurality of stent rings located at an intermediate position between two other of the plurality of stent rings located on either side of the at least one of the plurality of stent rings located at the intermediate position, and a third mechanically releasable diameter-restraining device restraining a distal end of one of the plurality of stent rings located at the intermediate position along the graft tube, at least one release mechanism operable to release the second and third mechanically releasable diameter-restraining devices, and a bare stent extending from the proximal end of the graft tube and designed to flare outwardly relative to the graft tube so as to engage in use a cavity of an aortic sinus of a patient, where the stent graft has a first expanded configuration and a second expanded configuration where the stent graft is fully expanded, where in the first expanded configuration the graft tube at the intermediate position has a smaller diameter than adjacent portions of the graft tube.
- 14. A stent graft system comprising a stent graft including a tube of graft material, the tube of graft material having proximal and distal ends and an intermediate position between the proximal and distal ends, a plurality of stent rings attached to the tube of graft material, with one of the plurality of stent rings located at the intermediate position and between two other of the plurality of stent rings, and at least first, second, and third mechanically releasable diameter-restraining devices, the first mechanically releasable diameter-restraining device located proximate the proximal end of the tube of graft material and restraining the proximal end of the tube of graft material, the second mechanically releasable diameter-restraining device being located at the intermediate position and restraining the stent ring located at the intermediate position, at least one non-expandable release mechanism engaging at least one of the first and second mechanically releasable diameter restraining devices, where the stent graft has a first expanded configuration and a second expanded configuration, where in the first expanded configuration the stent graft, at the intermediate position, is contracted and has a smaller diameter than adjacent portions of the stent graft, and wherein the second mechanically releasable diameter-restraining device restrains the proximal end of the stent ring located at the intermediate position of the tube of graft material and the third diameter-restraining device restrains the distal end of the stent ring located at the intermediate position of the tube of graft material.
Specification