Filamentary devices and treatment of vascular defects

Abstract

Devices and methods for treatment of a patient's vasculature with some embodiments configured for delivery with a microcatheter for treatment of the cerebral vasculature of a patient. Some embodiments may include a permeable shell configured to occlude blood flow therethrough.

What is claimed is: 
     
         1 . A device for treatment of an aneurysm within a patient's vasculature, comprising:
 a self-expanding resilient permeable shell having a proximal end, a distal end, a longitudinal axis and further comprising:
 a plurality of elongate resilient filaments including large and small filaments of at least two different transverse dimensions with a woven structure, a radially constrained elongated state configured for delivery within a microcatheter with the thin woven filaments extending longitudinally from the proximal end to the distal end radially adjacent each other along a length of the filaments, and an expanded relaxed state with a longitudinally shortened configuration relative to the radially constrained state, wherein the filaments are bundled and secured to each other at a proximal end. 
   
     
     
         2 . The device of  claim 1 , wherein the permeable shell forms a generally spherical shape when in the expanded relaxed state. 
     
     
         3 . The device of  claim 1 , wherein the permeable shell forms a generally ovoid shape when in the expanded relaxed state. 
     
     
         4 . The device of  claim 1 , wherein the permeable shell forms a generally globular shape when in the expanded relaxed state. 
     
     
         5 . The device of  claim 1 , wherein the woven structure is adapted to reside within the aneurysm. 
     
     
         6 . The device of  claim 5 , wherein the device is adapted to span the neck of the aneurysm. 
     
     
         7 . The device of  claim 1 , wherein, after implantation, no part of the device extends over the aneurysm neck outside of the dome. 
     
     
         8 . The device of  claim 1 , wherein the smaller filaments have a transverse diameter of about 0.015 mm to about 0.5 mm. 
     
     
         9 . The device of  claim 1 , wherein the larger filaments have a transverse diameter of about 0.4 mm to about 0.1 mm. 
     
     
         10 . The device of  claim 1 , wherein the filaments are bundled and secured to each other at a distal end. 
     
     
         11 . A device for treatment of an aneurysm within a patients vasculature, comprising:
 a self-expanding resilient permeable shell having a proximal end, a distal end, a longitudinal axis and further comprising:
 a plurality of elongate resilient filaments with a woven structure, a radially constrained elongated state configured for delivery within a microcatheter with the thin woven filaments extending longitudinally from the proximal end to the distal end radially adjacent each other along a length of the filaments, and an expanded relaxed state with a longitudinally shortened configuration relative to the radially constrained state, wherein the filaments are bundled and secured to each other at a proximal end, 
   wherein the woven structure is adapted to reside within the aneurysm and wherein the device is adapted to span the neck of the aneurysm.   
     
     
         12 . The device of  claim 11 , wherein the permeable shell forms a generally spherical shape when in the expanded relaxed state. 
     
     
         13 . The device of  claim 11 , wherein the permeable shell forms a generally ovoid shape when in the expanded relaxed state. 
     
     
         14 . The device of  claim 11 , wherein the permeable shell forms a generally globular shape when in the expanded relaxed state. 
     
     
         15 . The device of  claim 11 , including large and small filaments of at least two different transverse dimensions. 
     
     
         16 . The device of  claim 11 , wherein, after implantation, no part of the device extends over the aneurysm neck outside of the dome. 
     
     
         17 . The device of  claim 11 , wherein the smaller filaments have a transverse diameter of about 0.015 mm to about 0.5 mm. 
     
     
         18 . The device of  claim 11 , wherein the larger filaments have a transverse diameter of about 0.4 mm to about 0.1 mm. 
     
     
         19 . The device of  claim 11 , wherein the filaments are bundled and secured to each other at a distal end.