Low profile non-symmetrical bare alignment stents with graft
First Claim
1. A stent graft configured for treatment of a thoracic ascending aortic dissection, the stent graft comprising:
- a proximal stent and a distal stent each includinga plurality of narrower apices defining a generally circular first stent end and comprisingfirst and second generally straight portions anda first curved portion disposed between the first and second straight portions and comprising a first radius of curvature; and
a plurality of broader apices defining a generally circular second stent end and comprisingthird and fourth generally straight portions anda second curved portion disposed between the third and fourth straight portions and comprising a second radius of curvature that is greater than the first radius of curvature, andwhere at least one of the first and second generally straight portions is continuous with at least one of the third and fourth generally straight portions;
a tubular graft material body secured to and extending between the proximal and distal stents, forming a patent fluid passage between them;
where each of the stents is secured to the graft material such that its broader apices extend beyond an end of the tubular graft material body; and
where an outer diameter defined by the broader apices of the generally circular second stent end is greater than an outer diameter defined by the narrower apices of the generally circular first stent end; and
at least one intermediate stent secured to the graft material between the proximal and distal stents, the at least one intermediate stent providing columnar support to maintain an open geometry of the tubular graft material body,where the first radius of curvature is from about 0.5 mm to about 1.5 mm,where the second radius of curvature is from about 4 mm to about 9 mm, andwhere a ratio of the first radius of curvature to the second radius of curvature is about 1;
2.6to about 1;
18, andwhere each of the proximal stent and the distal stent comprises at least one uncovered region.
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Accused Products
Abstract
A stent graft for use in a medical procedure to treat a dissection of a patient'"'"'s ascending thoracic aorta. The stent graft includes bare alignment stents at least at a proximal end, and often with a stent at both ends, each stent having opposing sets of curved apices, where the curved section of one broader set of apices has a radius of curvature that is greater than the curved section of the other narrower set of apices. The proximal stent is flared in a manner such that its broad apices occupy a larger circumference around the stent than do its narrower apices, where this flared feature provides for anchoring engagement near the aortic root in a manner not interfering with the coronary arteries or the aortic valve.
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Citations
18 Claims
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1. A stent graft configured for treatment of a thoracic ascending aortic dissection, the stent graft comprising:
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a proximal stent and a distal stent each including a plurality of narrower apices defining a generally circular first stent end and comprising first and second generally straight portions and a first curved portion disposed between the first and second straight portions and comprising a first radius of curvature; and a plurality of broader apices defining a generally circular second stent end and comprising third and fourth generally straight portions and a second curved portion disposed between the third and fourth straight portions and comprising a second radius of curvature that is greater than the first radius of curvature, and where at least one of the first and second generally straight portions is continuous with at least one of the third and fourth generally straight portions; a tubular graft material body secured to and extending between the proximal and distal stents, forming a patent fluid passage between them; where each of the stents is secured to the graft material such that its broader apices extend beyond an end of the tubular graft material body; and where an outer diameter defined by the broader apices of the generally circular second stent end is greater than an outer diameter defined by the narrower apices of the generally circular first stent end; and at least one intermediate stent secured to the graft material between the proximal and distal stents, the at least one intermediate stent providing columnar support to maintain an open geometry of the tubular graft material body, where the first radius of curvature is from about 0.5 mm to about 1.5 mm, where the second radius of curvature is from about 4 mm to about 9 mm, and where a ratio of the first radius of curvature to the second radius of curvature is about 1;
2.6to about 1;
18, andwhere each of the proximal stent and the distal stent comprises at least one uncovered region. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 17)
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12. A stent graft configured for treatment of a thoracic ascending aortic dissection, the stent graft comprising:
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a bare proximal-end alignment stent; a tube of graft material secured to a distal portion of the proximal-end stent, the tube of graft material comprising at least one intermediate stent secured thereto in a manner providing columnar support; where the proximal-end stent includes a plurality of broader apices and a plurality of narrower apices connected with the broader apices by a plurality of generally straight portions; where each broader apex comprises a first curved portion and each narrower apex comprises a second curved portion; where the first curved portion and the second curved portion each comprises at least one radius of curvature, and the radius of curvature of at least one of the broader apices is greater than the radius of curvature of at least one of the narrower apices; where the proximal-end stent is flared such that its proximal apices are more distant from a longitudinal center axis of the graft material tube than its distal apices, where the radius of the narrower apices is from about 0.5 mm to about 1.5 mm, where the radius of curvature of the broader apices is from about 4 mm to about 9 mm, and where a ratio of the radius of curvature of the narrower apices to the radius of curvature of the broader apices is about 1;
2.6 to about 1;
18, andwhere the bare proximal-end alignment stent comprises at least one uncovered region. - View Dependent Claims (13, 14, 15, 16, 18)
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Specification