Devices and methods for treatment of vascular aneurysms
First Claim
1. A method for treating an aneurysm comprising:
- placing a stent across the aneurysm, the stent comprising a first end, a second end, and an outside surface between the first and second ends;
delivering an elongated piece of expandable foam between the outside surface of the stent and a tissue surface of the aneurysm, the elongated piece increasing in length during delivery from a first length to a second length and comprising bends; and
during the delivering step, exposing the elongated piece of expandable foam to a fluid to expand the elongated piece of expandable foam such that as the elongated piece of expandable foam is delivered and increases in length it becomes exposed to the fluid and expands,wherein the elongated piece of expandable foam comprises a continuous foam structure when expanded,wherein the continuous foam structure partially or completely fills the aneurysm,wherein the continuous foam structure contacts a portion of the aneurysm wall and a portion of the outside surface of the stent; and
wherein the stent prevents the elongated piece of expandable foam from protruding out of the aneurysm into a vessel lumen.
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Accused Products
Abstract
The present invention relates to devices and methods for the treatment of diseases in the vasculature, and more specifically, devices and methods for treatment of aneurysms found in blood vessels. In a first embodiment of the present invention, a two part prostheses, where one part is an expandable sponge structure and the other part is an expandable tubular mesh structure, is provided. In the first embodiment, the expandable sponge structure is intended to fill the aneurysm cavity to prevent further dilatation of the vessel wall by creating a buffer or barrier between the pressurized pulsating blood flow and the thinning vessel wall. In the first embodiment, the expandable tubular mesh structure is placed across the aneurysm, contacting the inner wall of healthy vessel proximal and distal to the aneurysm.
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Citations
20 Claims
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1. A method for treating an aneurysm comprising:
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placing a stent across the aneurysm, the stent comprising a first end, a second end, and an outside surface between the first and second ends; delivering an elongated piece of expandable foam between the outside surface of the stent and a tissue surface of the aneurysm, the elongated piece increasing in length during delivery from a first length to a second length and comprising bends; and during the delivering step, exposing the elongated piece of expandable foam to a fluid to expand the elongated piece of expandable foam such that as the elongated piece of expandable foam is delivered and increases in length it becomes exposed to the fluid and expands, wherein the elongated piece of expandable foam comprises a continuous foam structure when expanded, wherein the continuous foam structure partially or completely fills the aneurysm, wherein the continuous foam structure contacts a portion of the aneurysm wall and a portion of the outside surface of the stent; and wherein the stent prevents the elongated piece of expandable foam from protruding out of the aneurysm into a vessel lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for treating an aneurysm comprising:
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placing a stent across the aneurysm, the stent comprising a first end, a second end, and an outside surface between the first and second ends; placing a catheter delivery system between the first end and the second end, wherein a tip of the catheter delivery system is in between the outside surface of the stent and the confines of the aneurysm; delivering an expandable foam into the catheter delivery system; deploying, from the catheter delivery system, a continuous length of the expandable foam into the confines of the aneurysm; and exposing the expandable foam to a fluid to expand the expandable foam, wherein the continuous length of the expandable foam comprises folds after deployment; wherein the continuous length of the expandable foam when expanded comprises a single foam structure in contact with a graft wall or a portion of the outside surface of the stent, the aneurysm wall, the proximal end of the aneurysm, and the distal end of the aneurysm, and wherein the stent prevents the continuous length of the expandable foam from protruding out of the aneurysm into a vessel lumen. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for treating an aneurysm comprising:
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placing a stent across the aneurysm, the stent comprising a first end, a second end, and an outside surface between the first and second ends; delivering a length of expandable foam having a bend between the outside surface of the stent and the confines of the aneurysm away from a blood flow path; creating, during the delivering step, the bend in the length of expandable foam; and exposing the length of expandable foam to a fluid to expand the expandable foam, wherein the length of expandable foam comprises a polymer, wherein the stent prevents the length of expandable foam from protruding out of the aneurysm into a vessel lumen. - View Dependent Claims (20)
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Specification