Methods and apparatus for treating aneurysms and other vascular defects
First Claim
1. An implantable device for bridging the neck of an aneurysm, comprising:
- a plurality of circumferential bars, and a plurality of longitudinal bars, wherein the longitudinal bars further comprise notches or bends to improve flexibility.
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Accused Products
Abstract
Devices and methods are disclosed for placing a barrier across the neck of a vascular aneurysm, and specifically across the neck of a cerebrovascular aneurysm. The barrier is a stent or neck bridge that completely or partially blocks the flow of blood into the aneurysm and, further, prevents the migration of embolic coils out of the aneurysm and into the parent vessel. The neck bridge or stent of the present invention comprises elements for superior flexibility and stability when placed within the parent vessel. The neck bridge or stent of the present invention is loaded into the catheter by either being rolled tightly and sheathed or stretched to permit loading into the delivery catheter in a small, highly flexible configuration that may be advanced through the cerebrovasculature to pathological aneurysms.
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Citations
34 Claims
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1. An implantable device for bridging the neck of an aneurysm, comprising:
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a plurality of circumferential bars, and a plurality of longitudinal bars, wherein the longitudinal bars further comprise notches or bends to improve flexibility. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 22, 23, 24, 30, 31, 32, 33, 34)
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15. A stent, adapted for bridging the neck of an aneurysm, comprising:
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an inner helix, and an outer helix, wherein the inner and outer helix are separate structures. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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25. A method of treating cerebrovascular aneurysms comprising the steps of:
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accessing the aneurysm with a guide catheter and a guidewire, delivering a stent to cover the neck of the aneurysm but minimizing coverage of feeder vessels and branch vessels, delivering embolic material through the openings in the stent to fill and pack the aneurysm, and adjusting the length of one or more longitudinal bars in the stent through selective heating of the bars. - View Dependent Claims (26, 27, 28, 29)
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Specification