Shaped occluding devices and methods of using the same
First Claim
1. A self-expanding braided stent comprising:
- a proximal portion formed by a plurality of helically braided filaments, wherein when the stent is in an expanded, pre-shaped state the proximal portion has a first central longitudinal axis and a first cross-sectional area;
a distal portion formed by the plurality of helically braided filaments, wherein when the stent is in the expanded, pre-shaped state the distal portion has a second central longitudinal axis and a second cross-sectional area; and
a narrowed portion between the proximal portion and the distal portion, the narrowed portion formed by the plurality of helically braided filaments, wherein when the stent is in the expanded, pre-shaped state the narrowed portions has a third central longitudinal axis and a third cross-sectional area that is less than the first cross-sectional area and the second cross-sectional area,wherein when the stent is in the expanded, pre-shaped state;
the narrowed portion comprises a porosity defined by the plurality of helically braided filaments that is lower than a porosity of the proximal portion and a porosity of the distal portion,the first and the second central longitudinal axes are axially aligned and the third central longitudinal axis is axially offset from the first and the second central longitudinal axes,the proximal portion has a uniform diameter along a first length extending from a first end of the stent to the narrowed portion, andthe distal portion has a uniform diameter along a second length extending from a second end of the stent to the narrowed portion.
1 Assignment
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Accused Products
Abstract
A self-expanding stent includes a proximal portion having a first cross-sectional area in an expanded state, a distal portion having a second cross-sectional area in an expanded state, a narrowed portion between the proximal portion and the distal portion, the narrowed portion comprising a cross-sectional area when in an expanded state that is less than the first cross-sectional area and the second cross-sectional area, wherein the narrowed portion is configured to increases flow velocity in the narrowed portion while reducing reduce pressure against a distal wall of the aneurysm by being axially disposed substantially between a proximal edge and a distal edge of an aneurysm neck or ostium, the flow traversing through the lumen of the self-expanding stent. In use, the self-expanding stent is positioned at the site of an aneurysm and expanded via release from a stent delivery device.
647 Citations
21 Claims
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1. A self-expanding braided stent comprising:
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a proximal portion formed by a plurality of helically braided filaments, wherein when the stent is in an expanded, pre-shaped state the proximal portion has a first central longitudinal axis and a first cross-sectional area; a distal portion formed by the plurality of helically braided filaments, wherein when the stent is in the expanded, pre-shaped state the distal portion has a second central longitudinal axis and a second cross-sectional area; and a narrowed portion between the proximal portion and the distal portion, the narrowed portion formed by the plurality of helically braided filaments, wherein when the stent is in the expanded, pre-shaped state the narrowed portions has a third central longitudinal axis and a third cross-sectional area that is less than the first cross-sectional area and the second cross-sectional area, wherein when the stent is in the expanded, pre-shaped state; the narrowed portion comprises a porosity defined by the plurality of helically braided filaments that is lower than a porosity of the proximal portion and a porosity of the distal portion, the first and the second central longitudinal axes are axially aligned and the third central longitudinal axis is axially offset from the first and the second central longitudinal axes, the proximal portion has a uniform diameter along a first length extending from a first end of the stent to the narrowed portion, and the distal portion has a uniform diameter along a second length extending from a second end of the stent to the narrowed portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system comprising:
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a self-expanding stent comprising; a proximal portion, wherein when the stent is in an expanded, pre-shaped state the proximal portion has a first central longitudinal axis and a first cross-sectional area; a distal portion, wherein when the stent is in the expanded, pre-shaped state the distal portion has a second central longitudinal axis and a second cross-sectional area; and a narrowed portion between the proximal portion and the distal portion, wherein when the stent is in the expanded, pre-shaped state the narrowed portion has a third central longitudinal axis and a third cross-sectional area that is less than the first cross-sectional area and the second cross-sectional area, wherein the stent is formed of a plurality of braided filaments extending along an entire length of the stent, wherein when the stent is in the expanded, pre-shaped state; the narrowed portion comprises a porosity defined by the braided filaments that is lower than a porosity of the proximal portion and a porosity of the distal portion, the first and the second central longitudinal axes are axially aligned and the third central longitudinal axis is axially offset from the first and the second central longitudinal axes, the proximal portion has a uniform diameter along a first length extending from a first end of the stent to the narrowed portion, and the distal portion has a uniform diameter along a second length extending from a second end of the stent to the narrowed portion; and a stent delivery device configured to position and release the self-expanding stent. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification