Method and apparatus for restricting flow through an opening in the side wall of a body lumen, and/or for reinforcing a weakness in the side wall of a body lumen, while still maintaining substantially normal flow through the body lumen
First Claim
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1. A device for positioning within a lumen of a blood vessel, adjacent to the mouth of an aneurysm extending from the blood vessel, for causing thrombosis of the aneurysm while maintaining substantially normal blood flow through the lumen of the blood vessel, the device consisting of:
- a single closed loop of elastic filament configurable between;
(i) an elongated, substantially linear configuration formed by two parallel lengths of the closed loop of elastic filament, whereby to facilitate movement along the lumen of the blood vessel; and
(ii) a spheroidal configuration for lodging within the lumen of the blood vessel, the spheroidal configuration providing (a) a single flow-restricting face sized and configured so as to cover the mouth of the aneurysm and restrict blood flow to the aneurysm, the size of the single flow-restricting face being larger than the mouth of the aneurysm so that the single flow-restricting face seats against the mouth of the aneurysm so as to restrict blood flow to the aneurysm while permitting substantially normal blood flow through the blood vessel when the flow-restricting face is positioned over the mouth of the aneurysm, with the degree of restriction at the mouth of the aneurysm being such that the aneurysm thromboses when the single flow-restricting face is positioned over the mouth of the aneurysm, the single, flow-restricting face comprising a plurality of lengths of the closed loop of elastic filament disposed in close proximity to one another, and (b) an open frame for engaging the interior side wall of the blood vessel and holding the single flow-restricting face against the mouth of the aneurysm, the open frame configured so as to maintain substantially normal blood flow through the lumen of the blood vessel, wherein the single flow-restricting face has a higher density of wire than the open frame.
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Abstract
An expandable substantially spherical structure for deployment in a blood vessel or other body lumen, comprising:
- an open frame formed out of a closed loop of filament and configured to assume (i) a collapsed configuration in the form of a substantially two-dimensional elongated loop structure so as to facilitate insertion into the blood vessel or other body lumen, and (ii) an expanded configuration in the form of a three-dimensional substantially spherical structure so as to facilitate retention at a site in the blood vessel or other body lumen; and
- a flow-restricting face carried by the open frame;
- wherein the open frame is configured so as to permit substantially normal flow therethrough when the open frame is in its expanded configuration, and further wherein the flow-restricting face is configured so as to restrict flow therethrough.
186 Citations
46 Claims
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1. A device for positioning within a lumen of a blood vessel, adjacent to the mouth of an aneurysm extending from the blood vessel, for causing thrombosis of the aneurysm while maintaining substantially normal blood flow through the lumen of the blood vessel, the device consisting of:
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a single closed loop of elastic filament configurable between; (i) an elongated, substantially linear configuration formed by two parallel lengths of the closed loop of elastic filament, whereby to facilitate movement along the lumen of the blood vessel; and (ii) a spheroidal configuration for lodging within the lumen of the blood vessel, the spheroidal configuration providing (a) a single flow-restricting face sized and configured so as to cover the mouth of the aneurysm and restrict blood flow to the aneurysm, the size of the single flow-restricting face being larger than the mouth of the aneurysm so that the single flow-restricting face seats against the mouth of the aneurysm so as to restrict blood flow to the aneurysm while permitting substantially normal blood flow through the blood vessel when the flow-restricting face is positioned over the mouth of the aneurysm, with the degree of restriction at the mouth of the aneurysm being such that the aneurysm thromboses when the single flow-restricting face is positioned over the mouth of the aneurysm, the single, flow-restricting face comprising a plurality of lengths of the closed loop of elastic filament disposed in close proximity to one another, and (b) an open frame for engaging the interior side wall of the blood vessel and holding the single flow-restricting face against the mouth of the aneurysm, the open frame configured so as to maintain substantially normal blood flow through the lumen of the blood vessel, wherein the single flow-restricting face has a higher density of wire than the open frame. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A method for causing thrombosis of an aneurysm extending from a blood vessel while maintaining substantially normal blood flow through the lumen of the blood vessel, the method comprising:
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providing a device consisting of; a single closed loop of elastic filament configurable between; (i) an elongated, substantially linear configuration formed by two parallel lengths of the closed loop of elastic filament, whereby to facilitate movement along the lumen of the blood vessel; and (ii) a spheroidal configuration for lodging within the lumen of the blood vessel, the spheroidal configuration providing (a) a single flow-restricting face sized and configured so as to cover the mouth of the aneurysm and restrict blood flow to the aneurysm, the size of the single flow-restricting face being larger than the mouth of the aneurysm so that the single flow-restricting face seats against the mouth of the aneurysm so as to restrict blood flow to the aneurysm while permitting substantially normal blood flow through the blood vessel when the single flow-restricting face is positioned over the mouth of the aneurysm, with the degree of restriction at the mouth of the aneurysm being such that the aneurysm thromboses when the single flow-restricting face is positioned over the mouth of the aneurysm, the single flow-restricting face comprising a plurality of lengths of the closed loop of elastic filament disposed in close proximity to one another, and (b) an open frame for engaging the interior side wall of the blood vessel and holding the single flow-restricting face against the mouth of the aneurysm, the open frame configured so as to maintain substantially normal blood flow through the lumen of the blood vessel, wherein the single flow-restricting face has a higher density of wire than the open frame; delivering the single closed loop of elastic filament to the aneurysm site while the single closed loop of elastic filament is configured in its elongated configuration; and
transforming the single closed loop of elastic filament to its spheroidal configuration so that the single closed loop of elastic filament is lodged against the mouth of the aneurysm, with the single flow-restricting face being positioned over the mouth of the aneurysm so as to restrict blood flow to the aneurysm while permitting substantially normal blood flow through the blood vessel and with the open frame maintaining substantially normal blood flow through the lumen of the blood vessel. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification