Layered braided aneurysm treatment device with corrugations

Abstract

An implant including an open end and a pinched end can have a predetermined shape. When in the predetermined shape, the tubular braid can include a proximal inversion and two segments, and the braid can be composed of one or more wires. The first segment can extend from the open end of the tubular braid to the proximal inversion. The second segment can be at least partially surrounded by the open end and extend from the proximal inversion to the pinched end. The tubular braid can also include at least one corrugated fold. The one or more corrugated folds can be located within the first segment, second segment, or both. The corrugated folds can be configured to assist in anchoring the example device when in the implanted shape within an aneurysm in a similar manner to stent struts to help the tubular braid hold its shape.

What is claimed is: 
     
         1 . A method comprising:
 positioning a distal end of a catheter approximate a neck of an aneurysm;   pushing a pinched end of a tubular braid distally through at least a portion of the catheter, the tubular braid comprising an open end and one or more wires;   positioning the open end within a sac of the aneurysm; and   deploying the tubular braid to an implanted shape within the aneurysm based upon a predetermined shape as follows: 
 inverting the tubular braid to form a proximal inversion by moving the open end over at least a portion of the braid; 
 shaping an outer layer of the tubular braid extending between the open end and the proximal inversion; and 
 shaping an inner layer of the tubular braid extending between the proximal inversion and the pinched end, wherein the inner layer comprises at least one corrugated fold. 
   
     
     
         2 . The method of  claim 1 , wherein a cross-sectional shape of the one or more wires forming the at least one corrugated fold is different from a cross-sectional shape of the one or more wires forming the remainder of the inner layer. 
     
     
         3 . The method of  claim 1 , wherein the one or more wires in the at least one corrugated fold of the inner layer are compressed along an axis such that a diameter of the one or more wires in the corrugated fold along the axis is lesser than a diameter of uncompressed portions of the tubular braid. 
     
     
         4 . The method of  claim 1 , further comprising apposing at least a portion of the outer layer with at least one corrugated fold formed within the inner layer. 
     
     
         5 . The method of  claim 1 , wherein the outer layer comprises at least one corrugated fold. 
     
     
         6 . The method of  claim 5 , further comprising apposing one or more walls of the aneurysm with at least one corrugated fold formed in the outer layer. 
     
     
         7 . The method of  claim 5 , further comprising apposing at least a portion of the outer layer with at least one corrugated fold formed within the inner layer. 
     
     
         8 . The method of  claim 5 , further comprising apposing at least one corrugated fold within the outer layer with at least one corrugated fold within the inner layer. 
     
     
         9 . The method of  claim 8 , wherein the one or more wires in the at least one corrugated fold of the outer layer are compressed along an axis such that a diameter of the wire in the corrugated fold along the axis is lesser than a diameter of uncompressed portions of the tubular braid. 
     
     
         10 . The method of  claim 9 , wherein compressing the wires comprising the at least one corrugated fold of the outer layer along an axis increases the rigidity of the at least one corrugated fold relative to the rest of the braid. 
     
     
         11 . The method of  claim 5 , wherein the outer layer is positioned to contact a wall of the aneurysm, and the proximal inversion is positioned to be approximate a neck of the aneurysm. 
     
     
         12 . The method of  claim 5 , wherein the at least one corrugated fold of the outer layer provides an outwardly radial force in a plane defining a boundary between the aneurysm and a blood vessel, the force sufficient to appose the outer layer to walls of the aneurysm.