Braid-Ball Embolic Devices

Abstract

Embolic implants, delivery systems and methods of manufacture and delivery are disclosed. The devices can be used for aneurysm treatment and/or parent vessel occlusion. Implant designs offer low profile compressibility for delivery to neurovasculature, while maintaining other necessary features such as density for occlusion purposes and desirable radial strength characteristics.

1 . An embolic device comprising:
 braid forming inner and outer layers, the layers defining an open volume and being adapted to compress for delivery through a catheter and expand upon release from constraint, the inner and outer layers meeting at a folded section closed at one end of the device, characterized in that, the inner and outer layers further meet at a hub closing and holding at least the outer braid layer at the other end of the device.   
     
     
         2 . The device of  claim 1 , wherein portions of the device adjacent to the hub and to the fold are rounded when fully expanded. 
     
     
         3 . The device of  claim 2 , wherein a central section of the device is cylindrical when fully expanded. 
     
     
         4 . The device of  claim 1 , wherein both inner and outer layers at the end of the device at the folded section together define a dome-shaped atraumatic surface when expanded. 
     
     
         5 . The device of  claim 4 , further comprising a filament tie interposed between the inner and outer layers, holding the folded section closed. 
     
     
         6 . The device of  claim 1 , further comprising a marker band interposed between the inner and outer layers, holding the folded section closed. 
     
     
         7 . The device of  claim 1 , wherein the inner braid layer is not held in the hub. 
     
     
         8 . The device of  claim 7 , wherein the inner braid layer terminates adjacent to the hub. 
     
     
         9 . The device of  claim 1 , wherein both the inner and outer braid layers are held in the hub. 
     
     
         10 . The device of  claim 1 , wherein the hub comprises an inner band and an outer band capturing the braid, the inner band defining a hub port. 
     
     
         11 . The device of  claim 1 , wherein the hub comprises a band outside the braid, the braid secured to the band. 
     
     
         12 . The device of  claim 11 , wherein the braid defines a hub port. 
     
     
         13 . The device of  claim 11 , where adhesive secures the braid to the band.