Intrasaccular Flow Diverter

Abstract

Intrasaccular flow diverter including: an interior fill braid physically inverted over itself forming a proximal inverted end and an opposite free end; and a dome braid disposed distally of and secured to the interior fill braid. Subject to application of an external mechanical force, the dome braid is transitionable between an expanded state and a compressed state. The dome braid has a proximal end with an opening defined therein through which starting at the free end the interior fill braid is passable therethrough exerting a radially outward force on the dome braid. A delivery wire is releasably detachable from the proximal inverted end of the interior fill braid. The dome braid has a stiffer profile relative to that of the interior fill braid to maintain in position within the aneurysm the dome braid as the interior fill braid is advanced therein.

What is claimed is: 
     
         1 . A method for treatment of an aneurysm using an intrasaccular flow diverter, wherein the intrasaccular flow diverter includes an interior fill braid and a dome braid disposed distally of the interior fill braid; the method comprising the steps of:
 deploying the dome braid within the aneurysm to be treated; wherein the deployed dome braid reverts to a dome, sphere or hemispherical pre-formed shape; and   apposing so as to conform in shape the deployed dome braid to that of the aneurysm to be treated by imparting interiorly on the deployed dome braid a radially outward force using the interior fill braid introduced therein.   
     
     
         2 . The method according to  claim 1 , wherein the interior fill braid is physically invertible over itself forming a proximal inverted end and an opposite free end; the dome braid is transitionable subject to application of an external mechanical force from an expanded state to a compressed state having a reduced overall diameter; the dome braid has a proximal end with an opening defined therein through which the free end of the interior fill braid is freely passable therethrough and into the dome braid. 
     
     
         3 . The method according to  claim 2 , wherein the intrasaccular flow diverter further comprises a delivery wire releasably detachable from the proximal inverted end of the interior fill braid. 
     
     
         4 . The method according to  claim 1 , wherein the dome braid has a stiffer profile relative to that of the interior fill braid. 
     
     
         5 . The method according to  claim 2 , wherein: (i) the interior fill braid has a complex spiral or helical pre-formed shape in the expanded state; and a substantially linear configuration in the compressed state; and (ii) the dome braid has a domed, spherical or hemi-spherical pre-formed shape in the expanded state; and a cylindrical tube configuration in the compressed state. 
     
     
         6 . The method according to  claim 2 , wherein the dome braid and interior fill braid are secured together proximate the opening by a band marker. 
     
     
         7 . The method according to  claim 4 , wherein the stiffer profile of the dome braid relative to that of the interior fill braid is achieved by the following characteristics: (i) increase thickness of individual wires forming the dome braid; (ii) decrease braid angle between wire forming the dome braid; and/or (iii) increase number of wires forming the dome braid.