Stent anchoring system
First Claim
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1. A stent, the stent comprising:
- an elongated tubular member comprising at least one filament interwoven to form a plurality of cells, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration, wherein in the collapsed configuration the plurality of cells have a first profile and in the expanded configuration the plurality of cells have a second profile different from the first profile; and
at least one barb fixed to the at least one filament at one end of the barb and extending along a length of the barb towards a free end, each barb having a width transverse to the length;
wherein the free end of the at least one barb is configured to be positioned radially inward of and under an adjacent winding of the at least one filament such that the adjacent winding extends over an entirety of the width of the barb when the elongated tubular member is in the collapsed configuration and to extend radially away from the elongated tubular member when the elongated tubular member is in the expanded configuration.
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Abstract
An illustrative stent may comprise an elongated tubular member having a first end and a second end and an intermediate region disposed therebetween. The elongated tubular member may include at least one barb attached thereto. The barb may be configured to be tucked under a filament of the stent during delivery of the stent and protrude radially from the stent, when the stent is deployed.
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Citations
20 Claims
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1. A stent, the stent comprising:
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an elongated tubular member comprising at least one filament interwoven to form a plurality of cells, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration, wherein in the collapsed configuration the plurality of cells have a first profile and in the expanded configuration the plurality of cells have a second profile different from the first profile; and at least one barb fixed to the at least one filament at one end of the barb and extending along a length of the barb towards a free end, each barb having a width transverse to the length; wherein the free end of the at least one barb is configured to be positioned radially inward of and under an adjacent winding of the at least one filament such that the adjacent winding extends over an entirety of the width of the barb when the elongated tubular member is in the collapsed configuration and to extend radially away from the elongated tubular member when the elongated tubular member is in the expanded configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 20)
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15. A stent, the stent comprising:
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an elongated tubular member comprising at least one filament interwoven to form a plurality of cells, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration; and a plurality of barbs fixed to the at least one filament and comprising a shape memory wire, the plurality of barbs biased to extend radially outward from the elongated tubular member when unconstrained, wherein at least some of the plurality of barbs have a first length and at least some of the plurality of barbs have a second length greater than the first length; wherein in the collapsed configuration the at least one filament applies a radially inward constraining force to a free end of each barb of the plurality of barbs such that the free ends are constrained radially inward of the at least one filament and as the elongated tubular member moves from the collapsed configuration to the expanded configuration the free end of at least some of the plurality of barbs is unconstrained by the at least one filament and extends radially outward from the elongated tubular member. - View Dependent Claims (16)
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17. A stent, the stent comprising:
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an elongated tubular member comprising at least one filament interwoven to form a plurality of cells defined by junctions of the at least one filament, the elongated tubular member configured to move between a collapsed configuration and an expanded configuration, wherein in the collapsed configuration the plurality of cells have a first profile and in the expanded configuration the plurality of cells have a second profile different from the first profile; and at least one barb fixed to the at least one filament at one end of the barb and extending towards a free end, wherein at least one of the at least one barb is fixed to the at least one filament between and spaced away from adjacent junctions; wherein the first profile is configured to exert a constraining force on the at least one barb to position the at least one barb radially inward of the at least one filament and the second profile is configured to remove the constraining force from the at least one barb such that the free end of the at least one barb extends radially outward from the elongated tubular member. - View Dependent Claims (18, 19)
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Specification