Janjua Toroidal (JAN-T) Intrasaccular Aneurysm Occlusion Device
This invention is a torus (or torus-section) shaped intrasaccular aneurysm occlusion device. A torus (or torus section) shape can be modeled by revolving a convex shape around an axis of revolution which is coplanar with the convex shape. The convex shape which is revolved can be a circle, an ellipse, or half of a yin-yang symbol. The device can further comprise one or more embolic members or embolic material which is inserted into the aneurysm sac through a central opening in the neck bridge.
1 . An intrasaccular aneurysm occlusion device comprising:
a torus-shaped neck bridge which is configured to be inserted into an aneurysm sac and then expanded to cover the neck of the aneurysm, wherein the shape of the neck bridge can be modeled by revolving a convex shape in three-dimensional space around an axis of revolution which is coplanar with the convex shape, wherein a convex shape diameter is the widest diameter of the convex shape which is perpendicular to the axis of revolution, wherein a revolution diameter is the widest diameter of the circle formed by the path of the center of the convex shape as the convex shape is revolved in three-dimensional space, and wherein the revolution diameter is greater than the convex shape diameter.
2 . The device in claim 1 wherein the device further comprises one or more embolic members or embolic material which is inserted into the aneurysm sac through a central opening in the neck bridge.
3 . The device in claim 1 wherein the revolution diameter is 5% to 30% greater than the convex shape diameter.
4 . The device in claim 1 wherein the convex shape is a circle.
5 . The device in claim 1 wherein the convex shape is an ellipse with a longitudinal axis which is perpendicular to the axis of revolution.
6 . The device in claim 1 wherein the convex shape is an ellipse with a longitudinal axis which is parallel to the axis of revolution.
7 . The device in claim 1 wherein the convex shape is an ellipse wherein an extension of a longitudinal axis of the ellipse intersects the axis of revolution at an acute angle.
8 . The device in claim 1 wherein the convex shape is the perimeter of the yin portion or the yang portion of a yin-yang symbol.
9 . The device in claim 1 wherein the convex shape is the perimeter of a teardrop shape.
10 . An intrasaccular aneurysm occlusion device comprising:
a torus-section-shaped neck bridge which is configured to be inserted into an aneurysm sac and then expanded to cover the neck of the aneurysm, wherein the shape of the neck bridge can be modeled by revolving a section of a convex shape in three-dimensional space around an axis of revolution which is coplanar with the convex shape, wherein a convex shape diameter is the widest diameter of the convex shape which is perpendicular to the axis of revolution, wherein a revolution diameter is the widest diameter of the circle formed by the path of the center of the convex shape as the convex shape is revolved in three-dimensional space, and wherein the revolution diameter is greater than the convex shape diameter.
11 . The device in claim 10 wherein the device further comprises one or more embolic members or embolic material which is inserted into the aneurysm sac through a central opening in the neck bridge.
12 . The device in claim 10 wherein the revolution diameter is 5% to 30% greater than the convex shape diameter.
13 . The device in claim 10 wherein the section of a convex shape is a semi-circle.
14 . The device in claim 10 wherein the section of a convex shape is the perimeter of a circle with a gap within a portion between 9 o'clock and 3 o'clock coordinates.
15 . The device in claim 10 wherein the section of a convex shape is the perimeter of a circle with a gap within a portion between 1 o'clock and 5 o'clock coordinates.
16 . The device in claim 10 wherein the section of a convex shape is a section of an ellipse with a longitudinal axis which is perpendicular to the axis of revolution.
17 . The device in claim 10 wherein the section of a convex shape is a section of an ellipse with a longitudinal axis which is parallel to the axis of revolution.
18 . The device in claim 10 wherein the section of a convex shape is a section of an ellipse wherein an extension of a longitudinal axis of the ellipse intersects the axis of revolution at an acute angle.
19 . The device in claim 10 wherein the section of the convex shape is the perimeter of an ellipse with a gap within a portion between 1 o'clock and 5 o'clock coordinates.
20 . An intrasaccular aneurysm occlusion device comprising:
a longitudinal catheter that is configured to be inserted into a blood vessel, wherein this blood vessel is the parent vessel from which an aneurysm has formed;
a longitudinal flexible embolic member that is configured to travel through the longitudinal lumen and be inserted into the aneurysm sac; and
an expandable toroidal member that is configured to travel through the longitudinal lumen, be inserted into the aneurysm sac, and be expanded within the aneurysm sac; wherein this toroidal member is configured to substantially occlude the aneurysm neck after it is expanded; wherein the longitudinal flexible embolic member is inserted into the aneurysm sac through a central opening in the expandable toroidal member; and wherein the expandable toroidal member prevents the longitudinal flexible member from protruding into the parent vessel of the aneurysm.