Endovascular occlusion device with hemodynamically enhanced sealing and anchoring
A vascular occlusion device having an expandable frame that carries a membrane. The membrane can include a tubular portion configured to transition between an open configuration in which the tubular portion is configured to receive a guidewire and a closed configuration in which the tubular portion is configured to occlude blood flow.
1. A vascular occlusion device, comprising:
an expandable frame comprising an upstream lobe and a downstream lobe separated by a neck portion, the upstream lobe comprising a concave configuration which is concave in a direction away from the downstream lobe, the neck portion forming a guidewire opening; and
a membrane carried by at least the upstream lobe, the membrane comprising a tubular portion extending in an upstream direction and at least partially through the upstream lobe, the tubular portion comprising a lumen at least partially aligned with the guidewire opening,
wherein the tubular portion comprises an reinforced portion anchored with respect to the expandable frame and a free portion extending in the upstream direction, a wall thickness of the reinforced portion being at least 3× greater than a wall thickness of the free portion,
wherein the tubular portion is tapered in the upstream direction and across at least a majority of a length of the tubular portion,
wherein the tubular portion extends in the upstream direction prior to deployment and post-deployment, and
wherein the tubular portion is configured to transition between an open configuration in which the tubular portion is configured to receive a guidewire and a closed configuration in which the tubular portion is configured to occlude blood flow.
2. The vascular occlusion device of claim 1 , wherein the tubular portion is integrally formed with a remaining portion of the membrane.
3. The vascular occlusion device of claim 1 , wherein the reinforced portion is integrally formed with the free end portion.
4. The vascular occlusion device of claim 1 , wherein the free portion comprises a duckbill valve.
5. The vascular occlusion device of claim 1 , wherein the tubular portion is tapered at an angle of less than about five degrees.
6. The vascular occlusion device of claim 1 , wherein the reinforced portion is non-porous and the free portion is porous.
7. The vascular occlusion device of claim 1 , wherein a wall density of the reinforced portion is at least 10× greater than a wall density of the free portion.
8. The vascular occlusion device of claim 1 , wherein the tubular portion extends outward of an open end of the upstream lobe.
9. The vascular occlusion device of claim 1 , wherein a ratio between a length of the tubular portion and a length of the upstream lobe is at least about 1:2.
10. The vascular occlusion device of claim 1 , wherein a transition between the wall thickness of the reinforced portion and the wall thickness of the free portion is a stepped transition.
11. The vascular occlusion device of claim 1 , wherein the reinforced portion extends across about 50% to about 75% of a length of the tubular portion.
12. The vascular occlusion device of claim 1 , wherein the reinforced portion extends across about 50% to about 75% of a length of the tubular portion.
13. A vascular occlusion device, comprising:
an expandable frame comprising a concave portion that is concave in an upstream direction, the expandable frame comprising a guidewire opening; and
a membrane carried by at least concave portion, the membrane comprising a tubular portion extending in the upstream direction and at least partially through the concave portion, the tubular portion comprising a lumen at least partially aligned with the guidewire opening,
wherein the tubular portion comprises an reinforced portion anchored with respect to the expandable frame and a free portion extending in the upstream direction, a wall thickness of the reinforced portion being at least 3× greater than a wall thickness of the free portion,
wherein the tubular portion is tapered in the upstream direction and across at least a majority of a length of the tubular portion,
wherein the tubular portion extends in the upstream direction prior to deployment and post-deployment, and
wherein the tubular portion is configured to transition between an open configuration in which the tubular portion is configured to receive a guidewire and a closed configuration in which the tubular portion is configured to occlude blood flow.
14. The vascular occlusion device of claim 13 , wherein the tubular portion is integrally formed with a remaining portion of the membrane.
15. The vascular occlusion device of claim 13 , wherein the reinforced portion is integrally formed with the free end portion.
16. The vascular occlusion device of claim 13 , wherein the free portion comprises a duckbill valve.
17. The vascular occlusion device of claim 13 , wherein the tubular portion is tapered at an angle of less than about 5 degrees.
18. The vascular occlusion device of claim 13 , wherein the reinforced portion is non-porous and the free portion is porous.
19. The vascular occlusion device of claim 13 , wherein a wall density of the reinforced portion is at least 10× greater than a wall density of the free portion.
20. The vascular occlusion device of claim 13 , wherein a transition between the wall thickness of the reinforced portion and the wall thickness of the free portion is a stepped transition.