SAC LINER FOR ANEURYSM REPAIR
Systems and methods for managing aneurysms provide additional support to an aneurysmal wall by disposing a flexible vascular liner against or in close proximity to the aneurysmal wall. The liner is flexibly expansive to conform to the wall of the aneurysm. The liner inhibits failure of the aneurysmal wall. The liner may also inhibit further growth in diameter of the aneurysm. Aneurysms in single arteries or near branched arteries may be supported by a flexible vascular liner.
1 . An endovascular system for aneurysm management comprising:
a vascular liner having a proximal open end at a proximal liner portion and an opposed distal open end at a distal liner portion defining an open liner lumen having a liner wall disposed there between and further defining a medial liner portion disposed between the proximal liner portion and the distal liner portion;
a proximal anchor associated with the proximal liner portion; and
a distal anchor associated with the distal liner portion;
wherein the liner wall of the medial liner portion is an unitary liner wall not having spaced-apart layers or membranes thereat and not having re-enforcing filaments, strands or stent portions thereat; and
wherein the liner wall of the medial liner portion is flexibly expansive to conform to a wall of an aneurysm to provide additional strength to aneurysmal tissue at the aneurysm wall.
2 . The endovascular system of claim 1 , wherein the liner wall of the medial liner portion comprises an extruded, non-textile polymeric material.
3 . The endovascular system of claim 2 , wherein the extruded, non-textile polymeric material comprises a material selected from the group consisting of polytetrafluoroethylene, expanded polytetrafluoroethylene having a node and fibril structure, expanded porous polytetrafluoroethylene not having a node and fibril structure, and combinations thereof.
4 . The endovascular system of claim 2 , wherein the liner wall of the medial liner portion comprises a plurality of layers of extruded, non-textile polymeric material laminated together to provide the unitary liner wall.
5 . The endovascular system of claim 3 , wherein the liner wall of the medial liner portion comprises a plurality of layers of extruded, non-textile polymeric material sintered together to provide the unitary liner wall.
6 . The endovascular system of claim 1 , wherein the liner wall of the medial liner portion has a wall thickness of about 0.005 inches or less than about 0.005 inches.
7 . The endovascular system of claim 1 , wherein the liner wall of the medial liner portion has a wall thickness of about 0.0012 inches or less than about 0.0012 inches.
8 . The endovascular system of claim 1 , wherein the liner wall of the medial liner portion has a wall thickness of about 0.0007 inches or less than about 0.0007 inches.
9 . The endovascular system of claim 1 , wherein the liner wall of the medial liner portion has a wall thickness of about 0.0005 inches or less than about 0.0005 inches.
10 . The endovascular system of claim 1 , wherein the liner wall of the medial liner portion is flexible to expand to a bulbous shape to substantially conform to the shape of the aneurysmal wall.
11 . The endovascular system of claim 1 , wherein the liner wall of the medial liner portion has a bulbous shape to generally conform to the shape of the aneurysmal wall.
12 . The endovascular system of claim 1 , wherein the liner wall of the medial liner portion is crimped.
13 . The endovascular system of claim 1 , wherein the proximal anchor is securably disposed at the proximal liner portion.
14 . The endovascular system of claim 1 , wherein the proximal anchor is securably affixed to the proximal liner portion.
15 . The endovascular system of claim 1 , wherein the distal anchor is securably disposed at the distal liner portion.
16 . The endovascular system of claim 1 , wherein the distal anchor is securably affixed to the distal liner portion.
17 . The endovascular system of claim 1 , further comprising:
a medial stent disposed between the proximal and distal anchor;
wherein the liner wall of the medial liner portion is not securably affixed to substantial portions of the medial stent.
18 . The endovascular system of claim 1 , wherein the proximal liner portion is D-shaped.
19 . The endovascular system of claim 18 , further comprising:
a second vascular liner having a proximal open end at a proximal liner portion and an opposed distal open end at a distal liner portion defining an open liner lumen having a liner wall disposed there between and further defining a medial liner portion disposed between the proximal liner portion and the distal liner portion;
a second proximal anchor associated with the proximal liner portion of the second vascular liner; and
a second distal anchor associated with the distal liner portion of the second vascular liner;
wherein the liner wall of the medial liner portion of the second vascular liner is an unitary liner wall not having spaced-apart layers or membranes thereat and not having re-enforcing filaments, strands or stent portions thereat;
wherein the liner wall of the medial liner portion of the second vascular liner is flexibly expansive to conform to a wall of an aneurysm to provide additional strength to aneurysmal tissue at the aneurysm wall to inhibit failure of the aneurysm wall;
wherein the proximal liner portion of the second vascular liner is D-shaped; and
wherein the D-shaped portion of the vascular liner and the D-shaped portion of the second vascular liner are complimentary such that the proximal liner portions of the vascular liner and the second vascular liner are deployable within a main artery proximal to the aneurysm, the distal portion of the vascular liner is deployable with a first branched artery distal of the aneurysm and the distal portion of the second vascular liner is deployable with a second branched artery distal of the aneurysm.
20 . A method for treating an aneurysm comprising:
providing a vascular system comprising:
a vascular liner having a proximal open end at a proximal liner portion and an opposed distal open end at a distal liner portion defining an open liner lumen having a liner wall disposed there between and further defining a medial liner portion disposed between the proximal liner portion and the distal liner portion;
a proximal anchor associated with the proximal liner portion; and
a distal anchor associated with the distal liner portion;
wherein the liner wall of the medial liner portion is an unitary liner wall not having spaced-apart layers or membranes thereat and not having re-enforcing filaments, strands or stent portions thereat; and
deploying the vascular liner system such that the proximal anchor is disposed proximally beyond an aneurysm and such that the distal anchor is disposed distally beyond the aneurysm; and
expanding the liner wall of the medial liner portion to allow the liner wall of the medial liner portion to conform to a wall of an aneurysm to provide additional strength to aneurysmal tissue at the aneurysm wall.
21 . The method of claim 20 , wherein, after the liner wall of the medial liner portion is deployed to the wall of the aneurysm, the vascular system inhibits failure of the aneurysmal wall.
22 . The method of claim 20 , wherein, after the liner wall of the medial liner portion is deployed to the wall of the aneurysm, the vascular system inhibits further growth in diameter of the aneurysm.
23 . The method of claim 20 , wherein the proximal liner portion is D-shaped.
24 . The method of claim 23 , further comprising
providing a second vascular liner having a proximal open end at a proximal liner portion and an opposed distal open end at a distal liner portion defining an open liner lumen having a liner wall disposed there between and further defining a medial liner portion disposed between the proximal liner portion and the distal liner portion;
providing a second proximal anchor associated with the proximal liner portion of the second vascular liner; and
providing a second distal anchor associated with the distal liner portion of the second vascular liner;
wherein the liner wall of the medial liner portion of the second vascular liner is an unitary liner wall not having spaced-apart layers or membranes thereat and not having re-enforcing filaments, strands or stent portions thereat;
wherein the proximal liner portion of the second vascular liner is D-shaped; and
deploying the D-shaped portion of the vascular liner and the D-shaped portion of the second vascular liner within a main artery proximal to the aneurysm such that the D-shaped portions are complimentary to provide flow paths of blood through the vascular liner and the second vascular liner without a substantial flow path of blood to the aneurysm;
deploying the distal portion of the vascular liner within a first branched artery distal of the aneurysm;
deploying the distal portion of the second vascular liner within a second branched artery distal of the aneurysm; and
expanding the liner wall of the medial liner portion of the second vascular liner to allow the liner wall of the medial liner portion of the second vascular liner to conform to a wall of the aneurysm to provide additional strength to aneurysmal tissue at the aneurysm wall.
25 . An endovascular system for aneurysm management comprising:
a vascular liner having a proximal open end at a proximal liner portion and an opposed distal open end at a distal liner portion defining an open liner lumen having a liner wall disposed there between and further defining a medial liner portion disposed between the proximal liner portion and the distal liner portion;
wherein the liner wall of the medial liner portion is an unitary liner wall not having spaced-apart layers or membranes thereat and not having re-enforcing filaments, strands or stent portions thereat; and
wherein the liner wall of the medial liner portion is flexibly expansive to conform to a wall of an aneurysm to provide additional strength to aneurysmal tissue at the aneurysm wall.
26 . The endovascular system of claim 25 , further comprising:
a proximal anchor associated with the proximal liner portion; and
a distal anchor associated with the distal liner portion;