Aneurysm treatment coils
First Claim
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1. A coiled implant, comprising:
- an outer coil arranged in a first winding formed by a first filament, the first winding having a circular or oval winding shape in a cross section transverse to a longitudinal axis of the implant; and
an inner coil concentric within the outer coil and arranged in a second winding formed by a second filament, the second winding having a polygonal winding shape in a cross section transverse to the longitudinal axis;
wherein the outer coil comprises the first filament and a third filament, and wherein a diameter of the first filament varies from a diameter of the third filament.
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Abstract
Systems and devices for endovascular treatment of intracranial aneurysms are described. Various configurations of coiled implants may be used as stenting devices or aneurysm coils. The implants include one or more filaments wound about a longitudinal axis to form a generally tubular shape. Lateral flexibility of the implants may be manipulated by, for example, adjusting a pitch between adjacent filaments, using different materials for the filaments, employing different filament cross-sectional shapes, grouping filaments into pluralities of varying flexibilities, and nesting inner coils within outer coils.
450 Citations
16 Claims
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1. A coiled implant, comprising:
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an outer coil arranged in a first winding formed by a first filament, the first winding having a circular or oval winding shape in a cross section transverse to a longitudinal axis of the implant; and an inner coil concentric within the outer coil and arranged in a second winding formed by a second filament, the second winding having a polygonal winding shape in a cross section transverse to the longitudinal axis; wherein the outer coil comprises the first filament and a third filament, and wherein a diameter of the first filament varies from a diameter of the third filament. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A coiled implant, comprising:
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an outer coil arranged in a first winding formed by a first filament, the first winding having a first polygonal winding shape in a cross section transverse to a longitudinal axis of the implant; and an inner coil concentric within the outer coil and arranged in a second winding formed by a second filament, the second winding having a second polygonal winding shape in a cross section transverse to the longitudinal axis; wherein the outer coil comprises the first filament and a third filament, and wherein a diameter of the first filament varies from a diameter of the third filament. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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Specification