Expandable vascular occlusion device with lead framing coil

Abstract

An occlusion device that includes an inner embolic element with a proximal section and a distal section, wherein the distal section has a first stiffness and the proximal section has a second stiffness. An expandable mesh is included that is capable of being transformed between a collapsed position and an expanded position, wherein the expandable mesh is disposed over a portion of the proximal section of the inner embolic device and the first stiffness is greater than the second stiffness.

What is claimed is: 
     
         1 . A method of treating an aneurysm using an occlusion device having an inner embolic element with a proximal section and a distal section comprising a framing coil, and an expandable mesh, comprising the steps of:
 providing a first stiffness for the distal section;   providing a second stiffness for the proximal section different from the first stiffness;   disposing the expandable mesh over a portion of the proximal section of the inner embolic element;   placing the occlusion device within a vessel of a patient;   directing the occlusion device to the aneurysm;   deploying the distal section of the inner embolic element into the aneurysm from a catheter;   assuming, by the distal section of the inner embolic element, a predetermined shape; and p 1  deploying the expandable mesh into the aneurysm such that the distal section frames the aneurysm.   
     
     
         2 . The method of  claim 1  further comprising the step of configuring the different stiffness of inner embolic element so that the distal section is stiffer than the proximal section. 
     
     
         3 . The method of  claim 1 , wherein the distal section has a stiffness that is at least ten times the stiffness of the proximal section. 
     
     
         4 . The method of  claim 1 , wherein the distal section has a stiffness that is up to twenty times stiffer than the proximal section. 
     
     
         5 . The method of  claim 1 , wherein the distal section has a stiffness that is up to thirty times stiffer than the proximal section. 
     
     
         6 . The method of  claim 1 , wherein the distal section has a length that is approximately at least 7% of a total length of the occlusion device. 
     
     
         7 . The method of  claim 1 , wherein the expandable mesh has a mesh length in a collapsed position; and
 wherein the proximal section has a proximal length, that is approximately 2%-5% longer than the collapsed mesh length.   
     
     
         8 . The method of  claim 1 , wherein the expandable mesh comprises a predetermined shape. 
     
     
         9 . The method of  claim 1 , wherein the proximal section comprising a mesh fills in the aneurysm to reach a proper packing density. 
     
     
         10 . The method of  claim 1 , wherein the proximal section of the inner embolic element is in tension and the expandable mesh is in compression when the expandable mesh is in the collapsed position. 
     
     
         11 . The method of  claim 1 , wherein the proximal section of the inner embolic element is in tension and the expandable mesh is in compression when the expandable mesh is in the collapsed position. 
     
     
         12 . A method of treating an aneurysm using an occlusion device having an inner embolic element with a proximal section and a distal section comprising a framing coil, and an expandable mesh, wherein the expandable mesh is disposed over a portion of the distal section of the inner embolic element, and wherein the proximal section having a different stiffness than the distal section, comprising the steps of:
 placing the occlusion device within a vessel of a patient;   directing the occlusion device to the aneurysm;   deploying the expandable mesh with the distal section of the inner embolic element into the aneurysm from a catheter;   framing the aneurysm with the distal section;   assuming, by the expandable mesh, a predetermined shape;   deploying the proximal section of the inner embolic element into the aneurysm from a catheter; and   assuming, by the proximal section of the inner embolic element, a predetermined shape to frame the aneurysm.   
     
     
         13 . The method of  claim 12 , wherein the proximal section comprising a mesh fills in the aneurysm to reach a proper packing density. 
     
     
         14 . The method of  claim 12 , wherein the expandable mesh comprises a predetermined shape. 
     
     
         15 . The method of  claim 12 , wherein the proximal section of the inner embolic element is in tension and the expandable mesh is in compression when the expandable mesh is in the collapsed position. 
     
     
         16 . The method of  claim 12 , wherein the proximal section of the inner embolic element is in tension and the expandable mesh is in compression when the expandable mesh is in the collapsed position. 
     
     
         17 . The method of  claim 12  further comprising the step of configuring the different stiffness of inner embolic element so that the distal section is stiffer than the proximal section. 
     
     
         18 . The method of  claim 12 , wherein the distal section has a stiffness that is at least ten times the stiffness of the proximal section. 
     
     
         19 . The method of  claim 12 , wherein the distal section has a length that is approximately at least 7% of a total length of the occlusion device. 
     
     
         20 . The method of  claim 12 , wherein the expandable mesh has a mesh length in a collapsed position; and
 wherein the proximal section has a proximal length, that is approximately 2%-5% longer than the collapsed mesh length.