Stent with protected barbs
First Claim
Patent Images
1. An endoluminal prosthesis comprising:
- a stent configurable between a compressed configuration within a sheath and an expanded configuration and having at least one strut;
at least one barb secured to the at least one strut and comprising a distal tip, the at least one barb having a retracted configuration toward the strut and an extended configuration biased away from the strut, wherein the at least one barb is moveable between the retracted configuration and the extended configuration; and
at least one degradable barb guard disposed about the at least one strut and the at least one barb and covering at least a portion of the barb and holding it in the retracted configuration and protecting the distal tip when the stent is in the compressed configuration;
wherein the barb guard comprises a degradable structure that degrades to expose the distal tip of the barb when the stent is placed in a vessel.
3 Assignments
0 Petitions
Accused Products
Abstract
An endoluminal prosthesis is described and comprises a stent (40), At least one barb (42) secured to the stent, and a degradable barb guard (52) covering at least a portion of the barb and protecting the distal tip when the stent is in a compressed configuration. The barb guard (52) comprises a degradable structure that degrades to expose the distal tip of the barb when the stent is placed in a vessel. An endoluminal prosthesis deployment system comprising a sheath having a lumen and a prostesis within the sheath lumen is also described.
20 Citations
20 Claims
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1. An endoluminal prosthesis comprising:
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a stent configurable between a compressed configuration within a sheath and an expanded configuration and having at least one strut; at least one barb secured to the at least one strut and comprising a distal tip, the at least one barb having a retracted configuration toward the strut and an extended configuration biased away from the strut, wherein the at least one barb is moveable between the retracted configuration and the extended configuration; and at least one degradable barb guard disposed about the at least one strut and the at least one barb and covering at least a portion of the barb and holding it in the retracted configuration and protecting the distal tip when the stent is in the compressed configuration; wherein the barb guard comprises a degradable structure that degrades to expose the distal tip of the barb when the stent is placed in a vessel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An endoluminal prosthesis deployment system comprising:
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a sheath having a sheath lumen; and a prosthesis disposed within the sheath lumen and comprising a stent having at least one strut and at least one barb secured to the at least one strut, the at least one barb and the at least one strut having a circumference, wherein the at least one barb comprises a distal tip; and at least one degradable barb guard disposed substantially about the circumference of the at least one strut and the at least one barb and covering at least a portion of the barb and preventing direct contact between the distal tip of the and the sheath; wherein the guard comprises a degradable structure that degrades to expose the distal tip of the barb after the stent is released from the sheath; and wherein the at least one barb is movable between a retracted configuration and an extended configuration. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A method of deploying in a lumen an endoluminal prosthesis covered by a sheath, the endoluminal prosthesis having a plurality of struts and at least one barb attached to a strut of the plurality of struts, the barb having a first configuration toward the strut and a second configuration biased away from the strut, and
a degradable structure disposed about the strut and the at least one barb and holding the barb in the first configuration and preventing direct contact between each barb and the sheath, the method comprising: -
retracting the sheath to expose the endoluminal prosthesis; expanding said endoluminal prosthesis to an expanded state; degrading the degradable structure and moving the barb from the first configuration to the second configuration thereby engaging each barb with the lumen. - View Dependent Claims (18, 19, 20)
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Specification