Distal protection device for filtering and occlusion
First Claim
Patent Images
1. A distal protection device comprising:
- an elongate core wire;
an elongate tubular shaft slidably disposed about the core wire; and
a protection element including a braided tubular mesh having a plurality of pores having transverse dimensions, wherein each pore of the mesh is selectively transformable between a filter configuration and an occlusive configuration, the mesh having at least one inlet opening adjacent a mesh proximal end, the mesh being mounted coaxially about the core wire such that a mesh distal end is coupled about a core wire distal end and the mesh proximal end is coupled about a shaft distal end;
wherein, relative longitudinal movement between the proximal and distal ends of the mesh end causes transformation of the protection element between a collapsed configuration, the filter configuration wherein each pore of the mesh is substantially open and the occlusive configuration wherein the mesh is longitudinally contracted to reduce the transverse dimensions of the plurality of pores such that each pore of the mesh is substantially closed.
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Abstract
An intravascular, distal protection device including a braided mesh that may be selectively transformed between a collapsed configuration, a filter configuration and an occlusive configuration by mechanical or thermal operation. Alternatively, the distal protection device may include a non-inflatable occlusion valve located within the mesh and actuated by the same mechanical operation that transforms the braided mesh.
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Citations
20 Claims
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1. A distal protection device comprising:
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an elongate core wire; an elongate tubular shaft slidably disposed about the core wire; and a protection element including a braided tubular mesh having a plurality of pores having transverse dimensions, wherein each pore of the mesh is selectively transformable between a filter configuration and an occlusive configuration, the mesh having at least one inlet opening adjacent a mesh proximal end, the mesh being mounted coaxially about the core wire such that a mesh distal end is coupled about a core wire distal end and the mesh proximal end is coupled about a shaft distal end; wherein, relative longitudinal movement between the proximal and distal ends of the mesh end causes transformation of the protection element between a collapsed configuration, the filter configuration wherein each pore of the mesh is substantially open and the occlusive configuration wherein the mesh is longitudinally contracted to reduce the transverse dimensions of the plurality of pores such that each pore of the mesh is substantially closed. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A distal protection device comprising:
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an elongate core wire; an elongate tubular shaft slidably disposed about the core wire; and a protection element including a braided tubular mesh having at least one inlet for admitting blood flow into an interior of the mesh, the inlet being located adjacent a mesh proximal end, the mesh being mounted coaxially about the core wire such that a mesh distal end is coupled about a core wire distal end and the mesh proximal end is coupled about a shaft distal end; wherein relative longitudinal movement between the proximal and distal ends of the mesh end causes transformation of the protection element between a collapsed configuration, a filter configuration, and an occlusive configuration, and wherein the protection element includes a non-inflatable occlusion valve comprising a plurality of blades disposed within the mesh for blocking blood flow into the interior of the mesh via the at least one inlet when the protection element is in the occlusive configuration. - View Dependent Claims (17)
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18. A method of using a distal protection device comprising the steps of:
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providing a distal protection device including an elongate core wire;
a tubular shaft slidably disposed about the core wire; and
an expandable, braided tubular mesh having a distal end attached about the core wire, a proximal end attached about the shaft, at least one inlet adjacent the mesh proximal end, and a plurality of pores having transverse dimensions, wherein each pore of the mesh is selectively transformable between a filtering configuration and an occlusive configuration;locating the distal protection device within a vessel; sliding the shaft distally relative to the core wire such that the mesh radially expands from a collapsed configuration to the filtering configuration wherein a portion of an outer surface of the mesh is placed in apposition to a vessel wall and wherein each pore of the mesh is substantially open; and sliding the shaft farther distally relative to the core wire such that the mesh contracts axially into the occlusive configuration wherein the sliding causes transverse dimensions of each pore of the mesh to be reduced such that each pore of the mesh is substantially closed. - View Dependent Claims (19, 20)
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Specification