Autoexpandable vascular endoprosthesis
First Claim
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1. An autoexpandable vascular endoprosthesis for supporting walls of an anatomical canal, comprising:
- at least two juxtaposed assemblies, each assembly comprising a plurality of longitudinally extending juxtaposed ribs and a plurality of pairs of transverse strands interconnecting said ribs,said ribs in each assembly including an intermediate rib and a pair of external ribs spaced from and extending along opposite sides of said intermediate rib,said transverse strands in each assembly interconnecting said intermediate and external ribs and each pair of transverse strands forming a V shape, all of said V shapes being oriented in a same longitudinal direction with respect to said intermediate rib, said transverse strands being flexible and elastic,wherein said at least two assemblies are juxtaposed and connected together to form an open-ended cylinder with generally parallelogram-shaped openings defined by each pair of adjacent ribs and each pair of adjacent transverse strands, said cylinder being narrowed for insertion into the canal by applying tension in opposite longitudinal directions to an adjacent pair of said longitudinal ribs.
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Abstract
A vascular endoprosthesis intended to maintain the walls of anatomic channels. The endoprosthesis is formed by a combination of longitudinal juxtaposed unitary assemblies (1) having flexible, elastic longitudinal ribs (3, 4, 5) connected to each other by transverse strands (2) which are also flexible and elastic and are fastened on an intermediate rib (3) in such a manner as to form "V'"'"'s" with the intermediate rib (3). The combination forms a herringbone structure, the assembly of which by juxtaposition with other such assemblies forms an openwork cylinder (53).
379 Citations
15 Claims
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1. An autoexpandable vascular endoprosthesis for supporting walls of an anatomical canal, comprising:
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at least two juxtaposed assemblies, each assembly comprising a plurality of longitudinally extending juxtaposed ribs and a plurality of pairs of transverse strands interconnecting said ribs, said ribs in each assembly including an intermediate rib and a pair of external ribs spaced from and extending along opposite sides of said intermediate rib, said transverse strands in each assembly interconnecting said intermediate and external ribs and each pair of transverse strands forming a V shape, all of said V shapes being oriented in a same longitudinal direction with respect to said intermediate rib, said transverse strands being flexible and elastic, wherein said at least two assemblies are juxtaposed and connected together to form an open-ended cylinder with generally parallelogram-shaped openings defined by each pair of adjacent ribs and each pair of adjacent transverse strands, said cylinder being narrowed for insertion into the canal by applying tension in opposite longitudinal directions to an adjacent pair of said longitudinal ribs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An autoexpandable endoprosthesis for supporting the walls of an anatomic channel, the endoprosthesis having opposed ends, a longitudinal axis and a substantially open-worked cylindrical shape forming an internal lumen;
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the endoprosthesis having a compressed configuration, wherein the endoprosthesis is compressed for insertion into the canal and the internal lumen is of a relatively small diameter, and an expanded configuration in which the endoprosthesis is in a normally expanded condition with the internal lumen having a relatively large diameter, the endoprosthesis comprising; a plurality of longitudinal external ribs having opposed ends and being distributed in parallel about the longitudinal axis of the endoprosthesis; a plurality of longitudinal intermediate ribs having opposed ends and being distributed in parallel about the longitudinal axis of the endoprosthesis, each of the intermediate ribs being disposed between two of the external ribs, the intermediate ribs being longitudinally spaced from the respective external ribs by an equal predetermined distance, wherein at each end of the endoprosthesis the ends of the intermediate ribs are separated from the ends of the respective external ribs by the predetermined distance; a plurality of rings distributed along the longitudinal axis of the endoprosthesis for connecting the external and intermediate ribs together, each of the rings being comprised of a plurality of pairs of transverse strands, each of the pairs of strands forming a V-shape having a summit which is connected to the respective intermediate rib and opposed ends which are connected to the respective external ribs elements, the V-shapes of each pair of strands of each ring being oriented in the same direction, the intermediate ribs and the strands attached thereto forming a herringbone pattern, the compressed configuration being obtained by the longitudinal tension of neighboring external ribs in opposite directions with respect to the intermediate ribs, in the axial direction of the endoprosthesis. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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Specification