Endoluminal device having barb assembly and method of using same
First Claim
1. A device for implantation in a body lumen comprising:
- an implant having a radially compressed configuration and a radially expanded configuration and comprising at least one filament which pivots as said implant moves between said radially compressed configuration and said radially expanded configuration; and
at least one barb assembly comprising;
(i) a first portion attached to said implant, (ii) a bend, and (iii) a second portion, disposed opposite said first portion from said bend and having a bearing surface, wherein said second portion is adapted to protrude radially inward when said implant is in said radially compressed configuration and said at least one filament radially contacts and imparts a radially outward force against said bearing surface as said implant moves from said radially compressed configuration to said radially expanded configuration to cause said second portion to protrude radially outward when said stent is in said radially expanded configuration.
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Accused Products
Abstract
An endoluminal device for implantation in a body lumen reduces movement or migration of the device after implantation by the use of barbs or barb assemblies. A first embodiment uses at least one barb assembly having first and second portions attached to an implant, such as a stent, and at either sides of a bend. The second portion is adapted to protrude radially inward when the implant is in the radially compressed configuration and radially outward when the implant is in its radially expanded configuration. A second embodiment uses a barb having a curved segment which is curved proximally and radially inwardly. A third embodiment utilizes at least one barb assembly having a wire with a length greater than the cell height of the implant across which it extends and a substantially uniform cross-sectional area. Methods for implanting such devices are also contemplated.
272 Citations
23 Claims
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1. A device for implantation in a body lumen comprising:
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an implant having a radially compressed configuration and a radially expanded configuration and comprising at least one filament which pivots as said implant moves between said radially compressed configuration and said radially expanded configuration; and
at least one barb assembly comprising;
(i) a first portion attached to said implant, (ii) a bend, and (iii) a second portion, disposed opposite said first portion from said bend and having a bearing surface, wherein said second portion is adapted to protrude radially inward when said implant is in said radially compressed configuration and said at least one filament radially contacts and imparts a radially outward force against said bearing surface as said implant moves from said radially compressed configuration to said radially expanded configuration to cause said second portion to protrude radially outward when said stent is in said radially expanded configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for implanting an endoluminal device in a body lumen comprising the steps of:
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compressing the endoluminal device into a radially compressed configuration and retaining said device in an introducer, wherein said device comprises;
(a) an implant comprising at least one filament which pivots as said implant moves between said radially compressed configuration and a radially expanded configuration and (b) at least one barb assembly comprising;
(i) a first portion attached to said implant, (ii) a bend, and (iii) a second portion, disposed opposite said first portion from said bend and having a bearing surface and adapted to protrude radially inward when said implant is in said radially compressed configuration;
introducing said introducer into the body lumen to a deployment location; and
deploying said endoluminal device from said introducer and into the body lumen, wherein said endoluminal device expands to form a radial expanded portion and said at least one filament radially contacts said second portion and imparts a radially outward force against said bearing surface as said implant moves from said radially compressed configuration to said radially expanded configuration to cause said second portion to protrude radially outward and engage said body lumen when said stent is in said radially expanded configuration. - View Dependent Claims (10, 11)
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12. A device for implantation in a body lumen from a proximal access location comprising:
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an implant having a radially compressed configuration for insertion into a sheath and comprising at least one filament;
at least one barb comprising (i) a base segment attached to said at least one filament and (b) a curved segment extending from said base segment and terminating in a point, wherein said curved segment is curved proximally and radially inwardly but not extending radially within the periphery defined by said implant. - View Dependent Claims (13, 14, 15, 16)
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17. A method for implanting an endoluminal device in a body lumen comprising the steps of:
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compressing the endoluminal device into a radially compressed configuration and retaining said device in an introducer, wherein said device comprises;
(a) an implant comprising at least one filament and (b) at least one barb comprising;
(i) a base segment attached to said at least one filament and (b) a curved segment extending from said base segment and terminating in a point, wherein said curved segment is curved proximally and radially inwardly but not extending radially within the periphery defined by said implant;
introducing said introducer into the body lumen to a deployment location;
deploying said endoluminal device from said introducer and into the body lumen, wherein said endoluminal device expands to form a radial expanded portion and said at least one curved portion translates away from said implant; and
twisting said stent between 1 and 15 degrees to cause said curved segment to engage said body lumen.
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18. A device for implantation in a body lumen comprising:
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an implant having a radially compressed configuration and a radially expanded configuration and defining a plurality of cells each having a cell height; and
at least one barb assembly comprising;
(i) a wire extending from the top of a cell to the bottom of a cell and having a length greater than the cell height and a substantially uniform cross-sectional area and (ii) a hook attached to said wire and extending radially outward, wherein said wire is formed to arc radially inwardly when said implant is in said radially compressed configuration and is capable of being arced radially outward when said implant is in said radially expanded configuration. - View Dependent Claims (19, 20, 21, 22)
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23. A method for implanting an endoluminal device in a body lumen comprising the steps of:
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compressing the endoluminal device into a radially compressed configuration and retaining said device in an introducer, wherein said device comprises;
(a) an implant having a radially expanded configuration and defining a plurality of cells each having a cell height and (b) at least one barb assembly comprising;
(i) a wire extending from the top of a cell to the bottom of a cell and having a length greater than the cell height and a substantially uniform cross-sectional area and (ii) a hook attached to said wire and extending radially outward, wherein said barb assembly is formed to arc radially inwardly when said implant is in said radially compressed configuration and is capable of being arced radially outward when said implant is in said radially expanded configuration;
introducing said introducer into the body lumen to a deployment location;
deploying said endoluminal device from said introducer and into the body lumen, wherein said endoluminal device expands to form a radial expanded portion; and
imparting a radially outward force against said barb assembly to cause said barb assembly to arc radially outwardly and cause said hook to engage said body lumen.
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Specification