Implantable endoprosthesis with patterned terminated ends and methods for making same
First Claim
Patent Images
1. A braided implantable endoprosthesis including:
- a first number of elongated resilient first members wound helically in a first common direction, and a second number of elongate resilient second members wound in a second common direction different than the first common direction, and braided together with the first members in a braid pattern other than 1-over-1-under, to form a tubular body constrainable to a reduced diameter and self-expandable to an increased diameter, said tubular body having opposite first and second end edges;
wherein the first members and the second members form multiple crossing points each comprised of a crossing member pair including a first member and a second member, each member of the pair contacting the other and being free for a limited sliding with respect to the other;
wherein the crossing points include control points at which one of the members of the pair supplies sufficient control to the other member of the pair, and non-control pairs at which neither member of the pair supplies sufficient control to the other;
a first trim extension including a first series of edge terminae, formed in the first and second members and defining a portion of said first end edge of the tubular body, wherein each of the edge terminae is spaced at a pre-determined distance from its nearest crossing point; and
a second trim extension including a second series of terminae of at least one of the first members and the second members, wherein the second trim extension is spaced apart from the first trim extension in an axially inward direction with respect to the tubular body by a depth in said axial direction of at least one pic.
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Abstract
The invention relates to a braided implantable endoprosthesis such as a stent or stent-graft with selectively terminated elongated member ends to aid orientation and control. A saw-tooth or crown pattern is formed on an end or on an edge of an opening in the generally tubular body. The pattern is defined by a series of terminus on the elongated members at a predetermined distance from respective control points. The termini cooperate with the control points and provide layers when constrained. The invention also relates to methods of making a braided implantable endoprosthesis with patterned terminated ends.
264 Citations
29 Claims
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1. A braided implantable endoprosthesis including:
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a first number of elongated resilient first members wound helically in a first common direction, and a second number of elongate resilient second members wound in a second common direction different than the first common direction, and braided together with the first members in a braid pattern other than 1-over-1-under, to form a tubular body constrainable to a reduced diameter and self-expandable to an increased diameter, said tubular body having opposite first and second end edges;
wherein the first members and the second members form multiple crossing points each comprised of a crossing member pair including a first member and a second member, each member of the pair contacting the other and being free for a limited sliding with respect to the other;
wherein the crossing points include control points at which one of the members of the pair supplies sufficient control to the other member of the pair, and non-control pairs at which neither member of the pair supplies sufficient control to the other;
a first trim extension including a first series of edge terminae, formed in the first and second members and defining a portion of said first end edge of the tubular body, wherein each of the edge terminae is spaced at a pre-determined distance from its nearest crossing point; and
a second trim extension including a second series of terminae of at least one of the first members and the second members, wherein the second trim extension is spaced apart from the first trim extension in an axially inward direction with respect to the tubular body by a depth in said axial direction of at least one pic. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
each of the terminae of said second trim extension is spaced at said predetermined distance from its nearest one of said crossing points.
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3. The endoprosthesis of claim 2 wherein:
each of said crossing points nearest one of the terminae of the second trim extension is a control point.
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4. The endoprosthesis of claim 3 wherein:
said pre-determined distance is less than about one-half pic.
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5. The endoprosthesis of claim 4 wherein:
said pre-determined distance is about one-third pic.
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6. The endoprosthesis of claim 1 wherein:
the terminae of the first trim extension and the second extension cooperate to form a saw-tooth pattern of said first end edge to substantially orient a plurality of the first members and second members in a substantially similar longitudinal direction when the tubular body is in a constrained diameter.
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7. The endoprosthesis of claim 6 wherein:
the saw-tooth pattern is adapted to align the first and second members.
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8. The endoprosthesis of claim 1 wherein:
said longitudinal depth increases as the braid pattern increases.
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9. The endoprosthesis of claim 1 wherein:
the braid pattern is selected from the group of braid patterns consisting of;
2-over-2-under;
2-over-1-under;
1-over-2-under;
3-over-3-under;
3-over-2-under;
2-over-3-under;
3-over-1-under;
1-over-3-under;
4-over-4-under;
4-over-3-under;
3-over-4-under;
4-over-2-under;
2-over-4-under;
4-over-1-under;
1-over-4-under;
5-over-5-under;
5-over-4-under;
5-over-4-under;
4-over-5-under;
5-over-3-under;
3-over-5-under;
5-over-2-under;
2-over-5-under;
5-over-1-under; and
1-over-5-under.
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10. The endoprosthesis of claim 9 wherein:
the braid pattern is 2-over-2-under, and said depth is about one pic.
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11. The endoprosthesis of claim 9 wherein:
the braid pattern is 3-over-3-under, and the depth is about two pics.
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12. The endoprosthesis of claim 9 wherein:
the braid pattern is 4-over-4-under, and the depth is about three pics.
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13. The endoprosthesis of claim 1 wherein:
at least one of the first and second members includes a plurality of elongated members substantially parallel to one another.
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14. The endoprosthesis of claim 1 wherein:
said first number and said second number are less than 11.
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15. The endoprosthesis of claim 1 wherein:
said second number is different than the first number.
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16. The endoprosthesis of claim 1 wherein:
said tubular body is greater in diameter at the first end edge than along a middle portion thereof.
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17. The endoprosthesis of claim 1 wherein:
the tubular body is made of at least one material selected from the group of materials consisting of;
metals, plastics, bioabsorbable materials, synthetic materials, and natural materials.
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18. The endoprosthesis of claim 1 wherein:
the first and second common directions are substantially opposite, and the first and second members form a braid angle between 65 degrees and 155 degrees.
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19. A process for making a braided implantable endoprosthesis, including:
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braiding a first number of elongated resilient first members together with a second number of elongated resilient second members in a braid pattern other than 1-over-1-under, and in which the first and second members are wound helically in first and second different respective common directions thereby forming multiple crossing points each comprised of a member pair including one first member and one second member, thus to form a tubular body having opposite first and second end edges and a middle portion between the end edges, the tubular body being constrainable to a reduced diameter and self-expandable to an increased diameter;
selectively cutting the first and second members to form a first trim extension comprising a series of first edge terminae to define a portion of the first end edge of the tubular body, wherein the first and second members are selectively cut to position each of the first edge terminae at a pre-determined distance from its nearest crossing point; and
further, selectively cutting at least one of the first members and the second members to form a second trim extension comprising a second series of edge terminae, and further to position the second trim extension inwardly of the first trim extension, spaced apart longitudinally with respect to the tubular body from the first trim extension by a depth of at least one pic. - View Dependent Claims (20, 21, 22, 23, 24)
examining the crossing points and identifying as control points certain ones of the crossings at which one of the member pair supplies sufficient control to the other member of the pair; and
wherein said further selective cutting to form the second trim extension comprises forming all the terminae of the second series spaced at said pre-determined distance from one of the control points.
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21. The process of claim 20 wherein:
said selective cutting to form the second trim extension consists essentially of cutting the first members.
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22. The process of claim 21 further including:
selectively cutting the second members to form a third trim extension including a third series of terminae, wherein the third trim extension is spaced longitudinally from the first trim extension and the second extension, and is disposed between the first and second trim extensions.
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23. The process of claim 22 wherein:
each terminus of the first, second and third trim extensions is spaced apart from its nearest crossing point by said pre-determined distance.
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24. The process of claim 23 wherein:
said pre-determined distance is less than one-half pic.
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25. A process for making an implantable endoprosthesis, including:
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providing a longitudinally extending tubular body having opposite end edges and a middle portion between the edges, the tubular body being formed of a first number of elongated first members wound in a first common direction and a second number of elongated second members wound in a second common direction different than the first common direction, wherein the first and second members are braided in a braid pattern other than 1-over-1-under to form multiple crossing points, and wherein the tubular body is constrainable to a reduced diameter and tends to self-expand to an increased diameter when not constrained;
cutting the first members and second members along a trim line, to form in the first and second members a series of terminae along the trim line;
examining the crossing points to identify certain ones of the crossing points as control points where at least one member of a member pair at the crossing point supplies sufficient control to the other member of the member pair; and
trimming at least one of the first members and the second members proximate at least selected ones of the control points, to form a first trim extension including a series of terminae and spaced apart from the trim line in the longitudinal direction inwardly of the trim line by a depth of at least one pic. - View Dependent Claims (27)
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26. The process of 25 further including:
disposing a graft on one or more surfaces of the tubular body.
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28. A braided implantable endoprosthesis comprising:
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a first set of resilient elongated first members wound helically in a first direction, and a second set of resilient elongated second members wound helically in a second direction different than the first direction, and braided with the first members in a braid pattern of at least 1-over-1-under to form multiple crossing points to form a tubular body having opposite end edges and a middle portion there between, said tubular body being constrainable to a reduced diameter and tending to self-expand to an increased diameter when not constrained;
wherein each of the crossing points is formed by a member pair including one of the first members and one of the second members, in contact with one another and slidable with respect to one another;
a first trim extension including a first series of terminae of the first and second members defining at least a portion of the first end edge of the tubular body, each terminus of the first trim extension being spaced apart from its nearest one of the crossing points by a pre-determined distance; and
a second trim extension including a second series of terminae of at least one of the first members and the second members, said second trim extension being spaced longitudinally inwardly of the first trim extension by a longitudinal depth of at least one pic, wherein each terminus of the second trim extension is spaced apart from its nearest one of the crossing points by at most said pre-determined distance. - View Dependent Claims (29)
a graft material disposed on at least a portion of a surface of the tubular body.
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Specification