Devices for repairing aneurysms
View Patent ↗A device for repairing an aneurysm by deployment within the aneurysm comprises a graft tube, at least part thereof having an inflatable wall whereby the tube can be deployed in an artery and inflated to grip at least part of the arterial wall.
1. Apparatus for repairing an aneurysm, comprising
a device for deployment within the aneurysm, said device comprising an inner graft tube and an inflatable outer balloon over said inner graft tube, said inner graft tube being a single layer tube having an inner surface circumscribing a longitudinal passage through said tube and having an outer surface, said outer balloon having an inner wall formed by said tube and having an outer wall extending circumferentially around said tube and extending longitudinally along said tube, said outer wall having opposed ends attached to said outer surface along the circumference of said tube and at longitudinally spaced locations along said tube to enclose an interior of said balloon between said outer wall and said tube with said outer surface of said tube being disposed in said interior, said inner graft tube having an unexpanded condition and said inflatable outer balloon having an uninflated condition allowing deployment of said device in an artery at the location of an aneurysm, said inner graft tube being expandable within the artery to an expanded condition to contact the wall of the artery above and below the aneurysm to form a seal with the wall of the artery above and below the aneurysm, said outer balloon being inflatable within the aneurysm to an inflated condition with a rapidly settable substance supplied between said outer wall and said tube, said outer balloon in said inflated condition filling the aneurysm to support said device and to maintain said inner graft tube in said expanded condition; and
an inflatable deployment balloon having an uninflated condition to fit within said longitudinal passage of said inner graft tube in said unexpanded condition, said deployment balloon being inflatable within said inner graft tube to expand said inner graft tube from said unexpanded condition to said expanded condition within the artery and to maintain said inner graft tube in said expanded condition within the artery during inflation of said outer balloon with the settable substance, said deployment balloon being removable from said inner graft tube upon setting of the settable substance, whereby said device remains in the artery with said inner graft tube in said expanded condition and said outer balloon in said inflated condition.
2. The apparatus recited in claim 1 wherein said device is made of biologically compatible plastic material.
3. The apparatus recited in claim 1 wherein said inner graft tube is straight.
4. The apparatus recited in claim 1 wherein said inner graft tube is tapered.
5. The apparatus recited in claim 1 wherein said inner graft tube is bifurcated.
6. The apparatus recited in claim 1 wherein said apparatus further comprises a settable substance that rapidly sets to form a solid mass.
7. The apparatus recited in claim 1 wherein said apparatus further comprises a settable substance selected from the group consisting of collagen and temperature/pH sensitive hydrogels.
8. The apparatus recited in claim 7 wherein said settable substance is a hydrogel made of N-isopropyl acrylamide.
9. The apparatus recited in claim 7 wherein said inner graft tube is devoid of stents.
10. A method of repairing an aneurysm by deploying a device within an aneurysm located between normal portions of an artery wall above and below the aneurysm, said method comprising the steps of
delivering the device to the aneurysm on an inflatable deployment balloon, wherein the device comprises an inner graft tube and an inflatable outer balloon over the inner graft tube, the inner graft tube is a single layer tube having an inner surface circumscribing a longitudinal passage through the tube and having an outer surface, the outer balloon has an inner wall formed by the single layer tube and has an outer wall extending circumferentially around the tube and extending longitudinally along the tube, the outer wall has opposed ends attached to the outer surface along the circumference of the tube and at longitudinally spaced locations along the tube to enclose an interior of the balloon between the outer wall and the tube with the outer surface of the tube disposed in the interior, the inner graft tube has an unexpanded condition and the inflatable outer balloon has an uninflated condition, the inflatable deployment balloon has an uninflated condition to fit within the longitudinal passage of the inner graft tube in the unexpanded condition, wherein said step of delivering includes delivering the device to the aneurysm with the inflatable deployment balloon in its uninflated condition disposed within the longitudinal passage of the inner graft tube with the inner graft tube in its unexpanded condition and the outer balloon in Its uninflated condition;
inflating the deployment balloon from its uninflated condition within the inner graft tube to expand the inner graft tube from its unexpanded condition within the artery to an expanded condition in which the inner graft tube contacts the normal portions of the artery wall above and below the aneurysm to form a seal with the artery wall above and below the aneurysm;
inflating the outer balloon from its uninflated condition within the aneurysm to an inflated condition in which the outer balloon fills the aneurysm, wherein said step of inflating the outer balloon includes inflating the outer balloon with a rapidly settable substance supplied to the interior of the outer balloon while the deployment balloon is maintained in its inflated condition within the inner graft tube to maintain the inner graft tube in its expanded condition;
allowing the settable substance to rapidly set to rigidity the outer balloon in its inflated condition;
deflating the deployment balloon and removing the deployment balloon from the inner graft tube as soon as the settable substance has set; and
leaving the device in place in the artery with the device being supported by the rigidified outer balloon and the inner graft tube being maintained in its expanded condition by the rigidified outer balloon.