Emboli filtration system and methods of use
First Claim
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1. Apparatus for filtering emboli from blood flowing through a vessel, the apparatus comprising:
- a guide wire having proximal and distal regions, and proximal and distal stops on the distal region anda filter element rotatable and translatable relative to the guide wire,wherein the apparatus has a first configuration in which the filter is located proximal of the proximal stop and a second configuration in which the filter has been advanced in vitro to a position distal of the proximal stop, the proximal stop thereafter prohibiting proximal retraction of the filter element over the proximal stop, andfurther wherein the proximal stop comprises at least one depressible tab having proximal and distal ends, wherein the proximal end is affixed to the guide wire.
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Abstract
An emboli filtration apparatus is provided comprising a guide wire having a filter element captured thereon, so that the guide wire is free to rotate and translate while the filter element remains stationary. The apparatus allows for movement and rotation of the guide wire as devices are advanced over it to treat occlusive disease, substantially without dislodging the filter element. In a preferred embodiment, the guide wire comprises a proximal stop configured to reposition the filter element during a medical procedure without having to remove or insert additional interventional devices.
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Citations
13 Claims
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1. Apparatus for filtering emboli from blood flowing through a vessel, the apparatus comprising:
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a guide wire having proximal and distal regions, and proximal and distal stops on the distal region and a filter element rotatable and translatable relative to the guide wire, wherein the apparatus has a first configuration in which the filter is located proximal of the proximal stop and a second configuration in which the filter has been advanced in vitro to a position distal of the proximal stop, the proximal stop thereafter prohibiting proximal retraction of the filter element over the proximal stop, and further wherein the proximal stop comprises at least one depressible tab having proximal and distal ends, wherein the proximal end is affixed to the guide wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for filtering emboli from blood flowing through a vessel, the method comprising:
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providing an apparatus comprising a guide wire having a distal region including a distal stop, a proximal stop disposed proximal the distal stop, and a filter element translatable and rotatable relative to the guide wire, wherein the filter element is initially disposed proximal of the proximal stop, the proximal stop comprising at least one depressible tab having a proximal end affixed to the guide wire and a distal end, the method further comprising; providing the depressible tab in a relaxed state wherein the distal end is biased radially outward from an exterior surface of the guide wire; transluminally inserting the guide wire into a vessel; distally advancing the filter element in a contracted state over the depressible tab to cause the distal end of the depressible tab to be substantially flush with the exterior surface of the guide wire; returning the depressible tab to the relaxed state after the filter element is advanced distal of the proximal stop thereby preventing the filter from being retracted proximally; and deploying the filter element, distal of the proximal stop and proximal of the distal stop, to engage a wall of the vessel and filter emboli out of blood flowing through the vessel. - View Dependent Claims (11, 12, 13)
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Specification