Conical stent
First Claim
Patent Images
1. A stent for use in a body passageway, comprising:
- a flexible self-expandable braided tubular wall having a longitudinal axis, characterized in that the tubular wall comprises a first proximal anchor segment adapted to provide a sufficiently high radial force to prevent migration of the stent in a body passageway and having proximal and distal ends and a first outer diameter, the proximal end of the first proximal anchor segment terminating at a first free end of the stent;
a second distal way-making segment having proximal and distal ends and a second outer diameter smaller than said first outer diameter of said first proximal anchor segment, a distal end of the second distal segment terminating at a second free end of the stent; and
a third intermediate segment having a proximal end connected to the distal end of the first segment and a distal end connected to the proximal end of the second distal way-making segment; and
the braided tubular wall having braiding with varying steep angle with respect to the longitudinal axis of the tubular wall where the radial force and flexibility over at least a portion of the flexible self-expandable braided tubular wall is not constant.
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Abstract
The stent comprises a flexible self-expandable braided tubular wall having a proximal segment having an outer diameter, and a distal segment having an outer diameter smaller than the outer diameter of the proximal segment. An intermediate segment is formed between proximal and distal segments, which forms a truncated cone of which the base is forming the proximal end of the intermediate segment and of which the top is forming the distal end of the intermediate segment. A covering layer is arranged within the tubular wall.
309 Citations
24 Claims
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1. A stent for use in a body passageway, comprising:
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a flexible self-expandable braided tubular wall having a longitudinal axis, characterized in that the tubular wall comprises a first proximal anchor segment adapted to provide a sufficiently high radial force to prevent migration of the stent in a body passageway and having proximal and distal ends and a first outer diameter, the proximal end of the first proximal anchor segment terminating at a first free end of the stent; a second distal way-making segment having proximal and distal ends and a second outer diameter smaller than said first outer diameter of said first proximal anchor segment, a distal end of the second distal segment terminating at a second free end of the stent; and a third intermediate segment having a proximal end connected to the distal end of the first segment and a distal end connected to the proximal end of the second distal way-making segment; and the braided tubular wall having braiding with varying steep angle with respect to the longitudinal axis of the tubular wall where the radial force and flexibility over at least a portion of the flexible self-expandable braided tubular wall is not constant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A stent for use in a body passageway, comprising:
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a flexible self-expandable braided tubular wall having a longitudinal axis, characterized in that the tubular wall comprises a first proximal anchor segment adapted to provide a sufficiently high radial force to prevent migration of the stent in a body passageway and having proximal and distal ends and a first outer diameter, the proximal end of the first proximal anchor segment terminating at a first free end of the stent; a second distal way-making segment having proximal and distal ends and a second outer diameter smaller than said first outer diameter of said first proximal anchor segment, the distal end of the second distal segment terminating at a second free end of the stent; and a third intermediate segment having a proximal end connected to the distal end of the first segment and a distal end connected to the proximal end of the second distal way-making segment; and the braided tubular wall having braiding with varying steep angle with respect to the longitudinal axis of the tubular wall wherein the braided tubular wall is made of metal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A prosthesis comprising:
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a proximal mesh segment, an intermediate mesh segment, and a distal mesh segment, the prosthesis having an inside and outside surface, the proximal mesh segment including a plurality of filaments and having a first proximal end and a first distal end, a substantially constant braid angle and a substantially constant diameter in an unloaded state; the intermediate mesh segment including a plurality of filaments and having a second proximal end and a second distal end, a varying braid angle over the intermediate mesh segment, and a tapering diameter from the second proximal end to the second distal end in an unloaded state, the intermediate mesh segment being distal of the proximal mesh segment, and the first distal end of the proximal mesh segment being connected to the second proximal end of the intermediate segment; and a distal mesh segment including a plurality of filaments and having a third proximal end and a third distal end, a substantially constant braid angle and a substantially constant diameter smaller than the first diameter of the proximal mesh segment in an unloaded state, the distal mesh segment being distal of the intermediate mesh segment, and the third proximal end of the distal mesh segment being connected to the second distal end of the intermediate segment; wherein the filaments are metal, the prosthesis is self-expanding, and the first proximal end of the proximal mesh segment and the third distal end of the distal mesh segment terminate at a first free end and a second free end, respectively. - View Dependent Claims (21, 22, 23, 24)
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Specification