Thin Film Metallic Devices for Plugging Aneurysms or Vessels
Thin film metallic devices implantable within a human subject for occlusion of an aneurysm or blood vessel are provided. The devices include an embolization element that is moveable between a collapsed configuration for delivery to a deployed configuration within the body. The embolization device plugs the aneurysm or blood vessel preventing blood from flowing into or out of the aneurysm or other defective or diseased location of the blood vessel. The embolization element may be either self-supporting or supported by a strut structure. The occlusion device also includes an anchor element for anchoring the occlusion device and aiding in maintaining the embolization element in place. The anchor element is connected to the embolization device via a connector element.
1 . A vascular occlusion device, comprising:
an embolization element comprised of a thin film of a shape memory alloy having a plurality of pores extending through the thin film;
said embolization element having a collapsed state and an expanded state;
an anchor element for securing the embolization element within a blood vessel of a patient; and
at least one connector element connecting the embolization element to the anchor element.
2 . The vascular occlusion device of claim 1 , wherein the shape memory alloy is a nitinol.
3 . The vascular occlusion device of claim 1 , wherein the shape memory alloy is transformable between an austenitic state and a martensitic state; and wherein the embolization element is in the expanded position when the shape memory alloy is in the austenitic state and in the collapsed position when the shape memory alloy is in the martensitic state.
4 . The vascular occlusion device of claim 1 , wherein the embolization element is adapted to cover a neck of an aneurysm in the expanded position.
5 . The vascular occlusion device of claim 1 , wherein the embolization element is adapted to extend into an aneurysm in the expanded position.
6 . The vascular occlusion device of claim 1 , wherein the embolization element has a generally funnel-like shape in the expanded position.
7 . The vascular occlusion device of claim 1 , wherein the embolization element has a generally hemispherical shape in the expanded position.
8 . The vascular occlusion device of claim 1 , wherein the embolization element includes at least one support strut.
9 . The vascular occlusion device of claim 1 , wherein the anchor element comprises a stent.
10 . The vascular occlusion device of claim 9 , wherein the stent comprises a self-expanding stent.
11 . The vascular occlusion device of claim 1 , wherein the thin film of shape memory alloy has a thickness greater than about 0.1 microns but less than about 5 microns.
12 . A vascular occlusion device, comprising:
an embolization element comprised of a thin film of shape memory alloy having a plurality of pores extending through the thin film;
said embolization element has a collapsed state and an expanded state wherein the embolization element assumes a generally funnel-shaped configuration in the expanded state;
the generally funnel-shaped configuration of the embolization element in the expanded state has a proximal end portion and a distal end portion that is sized and shaped to plug the neck of an aneurysm;
an anchor element for securing the embolization element within a blood vessel of a patient; and
at least one connector element connecting the embolization device to the anchor element.
13 . The vascular occlusion device of claim 12 , wherein the shape memory alloy is a nitinol.
14 . The vascular occlusion device of claim 12 , wherein the shape memory alloy is transformable between an austenitic state and a martensitic state; and wherein the embolization element is in the expanded position when the shape memory alloy is in the austenitic state and in the collapsed position when the shape memory alloy is in the martensitic state.
15 . The vascular occlusion device of claim 12 , wherein the connector element is connected to the proximal end portion of the embolization element.
16 . The vascular occlusion device of claim 12 , wherein the anchor element comprises a stent.
17 . A vascular occlusion device, comprising:
an embolization element comprised of a thin film of shape memory alloy having a plurality of pores extending through the thin film;
said embolization element has a collapsed state and an expanded state wherein the embolization element assumes a generally hemispherically shaped configuration in the expanded state;
the generally hemispherically shaped configuration of the embolization element in the expanded state has a distal end portion and a closed proximal end portion that is sized and shaped to plug the neck of an aneurysm;
an anchor element for securing the embolization element within a blood vessel of a patient; and
at least one connector element connecting the embolization device to the anchor element.
18 . The vascular occlusion device of claim 17 , wherein the shape memory alloy is a nitinol.
19 . The vascular occlusion device of claim 17 , wherein the shape memory alloy is transformable between an austenitic state and a martensitic state; and wherein the embolization element is in the expanded position when the shape memory alloy is in the austenitic state and in the collapsed position when the shape memory alloy is in the martensitic state.
20 . The vascular occlusion device of claim 17 , wherein the connector element is connected to the proximal end portion of the embolization element.
21 . The vascular occlusion device of claim 17 , wherein the embolization element includes at least one support strut.
22 . The vascular occlusion device of claim 17 , wherein the anchor element comprises a stent.