Single-wire expandable cages for embolic filtering devices
First Claim
1. An embolic filtering device used to capture embolic debris in a body vessel, comprising:
- a filter assembly including an expandable cage adapted to move between an unexpanded position and an expanded position and a filter element attached to the expandable cage, the cage forming an structure capable of opening the filter element and maintaining the filter element open until the cage is placed in the unexpanded position; and
an elongated member having a distal end and a proximal end, the expandable cage being coupled to the guide wire near the distal end, wherein the cage is made from a continuous wire having a first end coupled to the guide wire and a second end coupled to the guide wire, the first end and second end being spaced apart along the longitudinal axis of the guide wire.
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Accused Products
Abstract
A single-wire expandable cage for an embolic filtering device includes a single cage wire coupled to an elongated member, such as a guide wire, and adapted to expand from an unexpanded position to an expanded position in a patient'"'"'s body vessel. The wire includes a first end and a second end which are coupled to the guide wire. A filter element is attached to the single-wire cage. The single-wire cage may be rotatably mounted to the guide wire or may be slidably disposed on the guide wire to allow the composite cage and filter element to be slid over the guide wire in an over-the-wire fashion once the guide wire is delivered to the target location in the patient'"'"'s vasculature. One embodiment of the single-wire cage utilizes an offset arrangement in which the guide wire remains extended along the wall of the body vessel once the single-wire cage is deployed. Another embodiment of the device centers the guide wire within the body vessel.
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Citations
42 Claims
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1. An embolic filtering device used to capture embolic debris in a body vessel, comprising:
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a filter assembly including an expandable cage adapted to move between an unexpanded position and an expanded position and a filter element attached to the expandable cage, the cage forming an structure capable of opening the filter element and maintaining the filter element open until the cage is placed in the unexpanded position; and
an elongated member having a distal end and a proximal end, the expandable cage being coupled to the guide wire near the distal end, wherein the cage is made from a continuous wire having a first end coupled to the guide wire and a second end coupled to the guide wire, the first end and second end being spaced apart along the longitudinal axis of the guide wire. - 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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24. The embolic filtering device of claim 23, wherein the support frame forms a spiral shape when placed in the expanded position.
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25. The embolic filtering device of claim 23, wherein the ends of the support frame are movable along the longitudinal axis of the guide wire
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26. The embolic filtering device of claim 23, wherein the support frame is made from a self-expanding material.
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27. The embolic filtering device of claim 23, wherein the first end and second end of the support frame are rotatably mounted to the guide wire.
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28. The embolic filtering device of claim 23, wherein the support frame forms a substantially spiral loop when placed in the deployed expanded position and the guide wire extends substantially in the center of the formed spiral loop.
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29. The embolic filtering device of claim 23, wherein the support frame forms a substantially spiral loop when placed in the deployed expanded position and the guide wire extends substantially along the periphery of the formed spiral loop.
- 30. The embolic filtering device of claim 23, wherein the wire forming the support frame is a wire ribbon.
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31. The embolic filtering device of claim 23, wherein the wire ribbon is made from a nickel-titanium alloy.
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33. The embolic filtering device of claim 23, wherein the ends of the support frame for hoops which extend around the guide wire.
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34. The filtering device of claim 23, wherein the support frame is movable between its expanded and unexpanded positions through relative longitudinal movement between the first end and second end of the wire.
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35. An embolic filtering device for capturing embolic debris in a body fluid flowing within a body vessel, comprising:
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a guide wire having a proximal stop fitting and an intermediate stop fitting attached thereto;
a support frame having a pre-deployment collapsed position and a deployed expanded position, the support frame having a first end coupled to the guide wire between the proximal stop fitting and the intermediate stop fitting and a second end coupled to the guide wire at a location distal to the intermediate stop fitting; and
a filtering element having a proximal inlet opening and a plurality of distal outlet openings, the outlet openings allowing the body fluid to flow through the filtering element but retaining embolic debris within the filtering element, and the inlet opening being larger than the outlet openings, the support frame opening the proximal opening of the filtering element when the support frame is in the deployed expanded position. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42)
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Specification