Proximal concave neck bridge with central lumen and distal net for occluding cerebral aneurysms
Disclosed herein is a bowl-shaped neck bridge with a distal-facing concavity and a central lumen. The neck bridge is inserted and expanded within a cerebral aneurysm. The, embolic members (such as embolic coils, embolic ribbons, or string-of-pearls embolic strands) are inserted through the central lumen into the aneurysm sac.
1. An intrasacular aneurysm occlusion device comprising:
a mesh which is configured to be inserted into an aneurysm, wherein the mesh has a first configuration with a tubular shape, wherein the mesh has a second configuration with an hourglass shape, and wherein the mesh has a third configuration with a proximal surface having a hemispherical or hemiellipsoidal shape and a distal surface having a funnel shape;
a rigid ring or band, wherein the rigid ring or band is slipped over a longitudinal center of the mesh which changes the mesh from the first configuration to the second configuration; and wherein a proximal lobe of the mesh is everted over a distal lobe of the mesh which changes the mesh from the second configuration to the third configuration; and
embolic material, wherein the embolic material is inserted through the rigid ring or band into the aneurysm.
2. The device in claim 1 wherein a distal end of the mesh is not radially constrained after the second configuration so that embolic material passes through the distal end of the mesh into the aneurysm.
3. A method for occluding an aneurysm comprising:
binding a longitudinal center of a tubular mesh with a rigid ring or band to transform the tubular mesh into an hourglass-shaped mesh;
everting a proximal lobe of the hourglass-shaped mesh over a distal lobe of the hourglass-shaped mesh to transform the hourglass-shaped mesh into a mesh with a proximal surface having a hemispherical or hemiellipsoidal shape and a distal surface having a funnel shape;
compressing the mesh for delivery through a catheter into an aneurysm sac;
expanding the mesh within the aneurysm sac; and
inserting embolic members through the rigid ring or band into the aneurysm sac.