Covered stent with encapsulated ends
First Claim
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1. A flexible covered stent, comprising:
- a stent having a wall defining a luminal surface and an abluminal surface;
a first tubular layer of expanded polytetrafluoroethylene, substantially covering said abluminal surface of said stent;
a second tubular layer of expanded polytetrafluoroethylene having a length less than a length of said first tubular layer and covering a first region of said luminal surface of said stent, wherein said second layer is bonded to said first layer through openings in said wall of said stent; and
a third tubular layer of expanded polytetrafluoroethylene, having a length less than a length of said first tubular layer and covering a second region of said luminal surface of said stent, wherein said third layer is bonded to said first layer through openings in said wall of said stent;
wherein a third region of said luminal surface of said stent is located between said first and second regions of said luminal surface of said stent, said third region not being covered by either said second or said third tubular layer.
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Abstract
A flexible covered stent having a stent covered on a first surface by a first layer of biocompatible material and on a second surface by both a second and third layer of biocompatible material, the first and second layers and the first and third layers of biocompatible material being bonded to one another through openings in a wall in the stent. The first layer of biocompatible material is longer than both the second and third layers of biocompatible material such that at least a portion of the second surface of the stent is not covered by either second or third layer, imparting flexibility to the stent.
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Citations
16 Claims
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1. A flexible covered stent, comprising:
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a stent having a wall defining a luminal surface and an abluminal surface; a first tubular layer of expanded polytetrafluoroethylene, substantially covering said abluminal surface of said stent; a second tubular layer of expanded polytetrafluoroethylene having a length less than a length of said first tubular layer and covering a first region of said luminal surface of said stent, wherein said second layer is bonded to said first layer through openings in said wall of said stent; and a third tubular layer of expanded polytetrafluoroethylene, having a length less than a length of said first tubular layer and covering a second region of said luminal surface of said stent, wherein said third layer is bonded to said first layer through openings in said wall of said stent; wherein a third region of said luminal surface of said stent is located between said first and second regions of said luminal surface of said stent, said third region not being covered by either said second or said third tubular layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification