Percutaneous endoprosthesis using suprarenal fixation and barbed anchors

Abstract

An endoprosthetic device for treating abdominal aortic aneurysms using suprarenal fixation. A stent ring is anchored in an area above the renal arties using self-flaring barbs that project during the nitinol expansion process. Sutures extend from the stent ring to an area below the renal arties to a bifurcated trunk portion comprising a nitinol fabric on a non-kinking frame. The bifurcated trunk is sealed proximal the iliac arteries and includes iliac leg holders having self-flaring retention struts for non-traumatic holding of iliac leg prosthetics. Suprarenal fixation and collapsible cells having retention projections and barbs that only flare during the nitinol expansion process assist in lowering the devices profile and sheathability for percutaneous delivery and may provide for recapturing the anchored device.

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         11 . A percutaneous endoprosthesis device for treating an abdominal aortic aneurysm comprising:
 a bifurcated trunk and a pair of endolegs mateable with said trunk to serve as a conduit for blood flow to a patient's iliac arteries;   said bifurcated trunk comprising a proximal stent connected to a bifurcated body portion via a matrix of sutures;   said proximal stent being collapsible into a low profile configuration for percutaneous delivery and expandable into a deployed configuration wherein said stent frictionally anchors to an interior of a vessel being treated, said stent including at least one expandable cell member configured to be collapsible to a narrow first shape for percutaneous delivery and expandable to a wider second shape defining a barb anchor extending outside the diameter of the stent for engaging the interior of said vessel   said bifurcated body portion having an aortic neck on a first end and a bifurcated leg section on a second end, said aortic neck having an outer wall configured to seal with an interior wall of said vessel and said bifurcated leg section having an inner wall defining a pair of endoleg receiving apertures; and   a pair of endolegs configured for insertion into a respective endoleg aperture of said bifurcated leg section of said bifurcated body portion of said bifurcated trunk.   
     
     
         12 . The device of  claim 11 , wherein said aortic neck includes a self-flaring barb. 
     
     
         13 . The device of  claim 11 , wherein said bifurcated trunk comprises a nitinol fabric on a thin frame. 
     
     
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