Offset proximal cage for embolic filtering devices
First Claim
1. A cage for an embolic filtering de ice used to filter embolic particles from a body vessel, comprising:
- a proximal strut assembly connected to a distal strut assembly which together extend along a longitudinal axis and are both movable between an unexpanded position and an expanded position, the distal strut assembly having an inlet opening which expands and forms an outer periphery of the cage when placed in the expanded position;
wherein the proximal strut assembly is adapted to extend substantially along the outer periphery in a parallel relationship with the longitudinal axis when placed in the expanded position and the proximal strut assembly is adapted to be rotatably attached to an elongated member.
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Accused Products
Abstract
An expandable cage used in conjunction with an embolic filtering device has a strut configuration including a proximal strut assembly coupled to a distal strut assembly. A filter can be attached to the distal strut assembly which has an inlet opening. The proximal strut assembly is “offset” from the distal strut assembly in that these proximal struts extend substantially along the vessel wall of the patient, rather than being “centered” in the body vessel when the cage is expanded in a body vessel. As a result, there is little cage structure directly in front of the opening of the filter, resulting in a virtually unobstructed opening for the filter.
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Citations
23 Claims
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1. A cage for an embolic filtering de ice used to filter embolic particles from a body vessel, comprising:
a proximal strut assembly connected to a distal strut assembly which together extend along a longitudinal axis and are both movable between an unexpanded position and an expanded position, the distal strut assembly having an inlet opening which expands and forms an outer periphery of the cage when placed in the expanded position;
wherein the proximal strut assembly is adapted to extend substantially along the outer periphery in a parallel relationship with the longitudinal axis when placed in the expanded position and the proximal strut assembly is adapted to be rotatably attached to an elongated member.- View Dependent Claims (2, 3, 4, 5, 6)
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7. An embolic filtering device used to filter embolic particles from a body vessel, comprising:
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an elongated member;
a filtering assembly rotatably attached to the elongated member and movable between an unexpanded position and an expanded position, the filtering assembly including an expandable cage and a filter member attached to the expandable cage, the expandable cage extending along a longitudinal axis and including a proximal strut assembly connected to a distal strut assembly, the fitter member being attached to the distal strut assembly, wherein the distal strut assembly has an inlet opening which expands and forms an outer periphery of the cage to allow embolic particles to enter the filter member and the proximal strut assembly is adapted to extend substantially along the outer periphery in a parallel relationship with the longitudinal axis when placed in the expanded position. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for implanting an embolic filtering device in a body vessel of a patient for filtering embolic particles entrained in the patient'"'"'s body fluid, comprising:
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providing a filtering assembly rotatably attached to a guide wire and movable between an unexpanded position and an expanded position, the filtering assembly extending along a longitudinal axis and including an expandable cage and a filter member attached to the expandable cage, the expandable cage including a proximal strut assembly connected to a distal strut assembly, the filter member being attached to the distal strut assembly, wherein the distal strut assembly has an inlet opening which expands to form an outer periphery of the filtering assembly and conforms to the wall of the body vessel to allow embolic particles to enter the filter member an the proximal strut assembly is adapted to extend substantially along the wall of the body vessel and the periphery of the filtering assembly in a parallel relationship with the longitudinal axis when placed in the expanded position;
maintaining the filtering assembly in the unexpanded position;
maneuvering the filtering assembly into the desired location in the patient; and
moving the filtering assembly into the expanded position. - View Dependent Claims (17, 18, 19, 20)
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21. A cage for an embolic filtering device used to filter embolic particles from a body vessel, comprising:
a proximal strut assembly connected to a distal strut assembly which together extend along a longitudinal axis and are both movable between an unexpanded position and an expanded position, the distal strut assembly having an inlet opening which expands to form an outer periphery of the cage and conforms to the wall of the body vessel when placed in the expanded position;
wherein the proximal strut assembly is adapted to extend substantially along the periphery in a parallel relationship with the longitudinal axis when placed in the expanded position and the proximal strut assembly is made from a different material than the distal strut assembly.
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22. An embolic filtering device used the filter embolic particles from a body vessel, comprising:
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an elongated member;
a filtering assembly attached to the elongated member an movable between an unexpanded position and an expanded position, the filtering assembly including an expandable cage and a filter member attached to the expandable cage, the expandable cage extending along a longitudinal axis and including a proximal strut assembly connected to a distal strut assembly, the proximal strut assembly being made from a different material than the distal strut assembly, the filter member being attached to the distal strut assembly, wherein the distal strut assembly has an inlet opening which expands to form an outer periphery of the cage and conforms to the wall of the body vessel to allow embolic particles to enter the filter member and the proximal strut assembly is adapted to extend substantially along the outer periphery in a parallel relationship with the longitudinal axis when placed in the expanded position.
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23. An embolic filtering device used to filter embolic particles from a body vessel, comprising:
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an elongated member;
a filtering assembly attached to the elongated member an movable between an unexpanded position and an expanded position, the filtering assembly including an expandable cage and a filter member attached to the expandable cage, the expandable cage extending alone a longitudinal axis and including a proximal strut assembly connected to a distal strut assembly, the filter member being attached to the distal strut assembly, wherein the distal strut assembly has an inlet opening which expands to form an outer periphery of the cage and conforms to the wall of the body vessel to allow embolic particles to enter the filter member and the proximal strut assembly is adapted to extend substantially along the outer periphery in a parallel relationship with the longitudinal axis when placed in the expanded position, the elongated member extending through the length of the expandable cage to the distal end of the assembly and including a distal tip coil that extends distally from the expandable cage.
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Specification