Expandable endoprostheses, systems, and methods for treating a bifurcated lumen
First Claim
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1. An expandable endoprosthesis, comprising:
- a tubular body having a distal end and a proximal end, a central longitudinal axis extending through the tubular body, a first plane and a second plane both parallel to the central longitudinal axis, the first plane and the second plane being orthogonal to each other, the distal end including at least two distally extending wing portions and at least two proximally extending recesses, the at least two distally extending wing portions being substantially symmetrical relative to both the first plane and the second plane, the at least two proximally extending recesses being substantially symmetrical relative to both the first plane and the second plane, the at least two distally extending wing portions and at least two proximally extending recesses being formed from at least one concentric ring having a plurality of alternating crests and valleys aligned in a wave pattern, a continuous inner surface of each at least two proximally extending recesses including a circumferentially extending transition recess intermediate a distal end of an adjacent wing portion and a proximal end of the recess,wherein the at least two proximally extending recesses extend the length of at least two concentric rings of the tubular body such that when deployed proximate a bifurcated lumen the at least two proximally extending recesses are configured to straddle a carina portion of the bifurcated lumen without substantially contacting the carina, andwherein expandability and flexibility of the expandable endoprosthesis increases from the proximal end to the distal end such that, when deployed proximate a bifurcated lumen, the distal end of the endoprosthesis may be expanded to a greater diameter than the proximal end and the at least two wing portions may extend into and along the lateral walls of the side branches of the bifurcated lumen.
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Abstract
An endoprosthesis for treating a bifurcated lumen. The distal end of the endoprosthesis can include at least two wings and at least two troughs so the endoprosthesis can adequately scaffold the ostium of a bifurcated lumen by at least partially straddling the carina of the lumen bifurcation. The distal end of the endoprosthesis can also be configured to have increased expandability to help allow conformity to the anatomy of a bifurcated lumen.
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Citations
27 Claims
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1. An expandable endoprosthesis, comprising:
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a tubular body having a distal end and a proximal end, a central longitudinal axis extending through the tubular body, a first plane and a second plane both parallel to the central longitudinal axis, the first plane and the second plane being orthogonal to each other, the distal end including at least two distally extending wing portions and at least two proximally extending recesses, the at least two distally extending wing portions being substantially symmetrical relative to both the first plane and the second plane, the at least two proximally extending recesses being substantially symmetrical relative to both the first plane and the second plane, the at least two distally extending wing portions and at least two proximally extending recesses being formed from at least one concentric ring having a plurality of alternating crests and valleys aligned in a wave pattern, a continuous inner surface of each at least two proximally extending recesses including a circumferentially extending transition recess intermediate a distal end of an adjacent wing portion and a proximal end of the recess, wherein the at least two proximally extending recesses extend the length of at least two concentric rings of the tubular body such that when deployed proximate a bifurcated lumen the at least two proximally extending recesses are configured to straddle a carina portion of the bifurcated lumen without substantially contacting the carina, and wherein expandability and flexibility of the expandable endoprosthesis increases from the proximal end to the distal end such that, when deployed proximate a bifurcated lumen, the distal end of the endoprosthesis may be expanded to a greater diameter than the proximal end and the at least two wing portions may extend into and along the lateral walls of the side branches of the bifurcated lumen. - View Dependent Claims (2, 3, 4, 5, 21, 22, 23, 24, 25, 26, 27)
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6. An expandable endoprosthesis, comprising:
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a tubular body having a distal end and a proximal end; the proximal end of the body being configured to expand from a contracted diameter to a first expanded diameter; and at least a portion of the distal end of the body being configured to expand from the contracted diameter to a second expanded diameter that is larger than the first expanded diameter; wherein the distal end includes at least two distally extending wing portions formed from a web structure having a plurality of alternating crests and valleys and at least two recessed portions extending proximately into the distal end of the body between the at least two distally extending wing portions such that the distal end includes alternating wing portions and recessed portions, a continuous inner surface of each at least two proximally extending recesses including a circumferentially extending transition recess intermediate a distal end of an adjacent wing portion and a proximal end of the recess, and wherein the distal end is configured in size and shape such that when deployed proximate a bifurcated lumen the at least two wing portions extend into and along the lateral walls of the side branches of the bifurcated lumen substantially without contacting a central wall portion of the bifurcated lumen; wherein the distal end comprises a plurality of concentric rings having a plurality of alternating crests and valleys, the plurality of concentric rings being aligned in a wave pattern, the wave pattern defined by arranging the crests in a pattern of increasing and decreasing distal extent, such that crests having an increased distal extension form peaks of the wave pattern and crests having a decreased distal extension form troughs of the wave pattern; wherein an inter-connector extends from each trough, adjacent to a distal-most peak forming one of the at least two distally extending wing portions of the distal concentric ring, and connecting the distal concentric ring with a longitudinally adjacent concentric ring of the plurality of concentric rings. - View Dependent Claims (7, 8, 9, 10)
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11. An expandable, intraluminal endoprosthesis, comprising:
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a tubular body having a length, proximal and distal ends, and a lumen extending therebetween; at least two wing portions extending distally from the distal end of the tubular body, the at least two wing portions including a web structure having plurality of alternating crests and valleys; and at least two recessed portions extending proximately into the distal end of the tubular body, wherein the at least two recessed portions extend proximally at least one quarter of the length of the tubular body; wherein the distal end is configured in size and shape such that when deployed proximate a bifurcated lumen the at least two recessed portions straddle the carina substantially without contacting the carina of the bifurcated lumen and the at least two wing portions extend into and along the lateral walls of the side branches of the bifurcated lumen substantially without contacting a central wall portion of the bifurcated lumen; wherein the distal end of the tubular body is formed from a web structure including a plurality of rounded cells, wherein a first rounded cell is defined by an apex of a crest having a distal semi-circular shape, an apex of a valley having a proximal semi-circular shape, a first curved strut extending from a first end of the apex of the crest to a first end of the apex of the valley, a second curved strut extending from a second end of the apex of the crest to a second end of the apex of the valley, the first and second curved struts being convex relative to the crest and the valley, the plurality of first and second curved struts forming a plurality of recesses along an inner surface of the at least two recessed portions. - View Dependent Claims (12, 13, 14, 15)
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16. An expandable endoprosthesis for treating a bifurcated lumen, comprising:
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a first set of concentric rings including a plurality of alternating crests and valleys defining a proximal end of a tubular body, wherein at least one crest or valley of each concentric ring of the first set of concentric rings is directly joined to a crest or valley of an adjacent concentric ring of the first set of concentric rings; a second set of concentric rings including a plurality of alternating crests and valleys defining a distal end of the tubular body, wherein at least one crest or valley of each concentric ring of the second set of concentric rings is indirectly joined to a crest or valley of an adjacent concentric ring of the second set of concentric rings by a plurality of angled inter-connecter elements, wherein at least two of the plurality of angled inter-connectors are non-parallel to each other such that the at least two of the plurality of angled inter-connectors extend away from each other or extend toward each other, two of the plurality of angled inter-connector elements extending from each valley adjacent a distal-most crest of a distal-most concentric ring of the second set of concentric rings; and wherein the distal end of the tubular body includes at least two distally extending wing portions formed by the plurality of alternating crests and valleys of the second set of concentric rings and at least two recessed portions extending proximally the length of at least two concentric rings of the tubular body, a continuous inner surface of each at least two proximally extending recesses including a circumferentially extending transition recess intermediate a distal end of an adjacent wing portion and a proximal end of the recess, and wherein the distal end is configured in size and shape such that when deployed proximate a bifurcated lumen the at least two recessed portions straddle the carina substantially without contacting the carina of the bifurcated lumen and the at least two wing portions extend into and along the lateral walls of the side branches of the bifurcated lumen substantially without contacting a central wall portion of the bifurcated lumen, and wherein the first set of concentric rings provides a first expandability and flexibility and the second set of concentric rings providing a second expandability such that the expandability and flexibility of the expandable endoprosthesis increases from the proximal end to the distal end. - View Dependent Claims (17, 18, 19, 20)
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Specification