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 a first portion attached to said implant, a bend, and 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 implant 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.
8 Citations
8 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 a first portion attached to said implant, a bend, and 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 implant is in said radially expanded configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification