In-stent ablative tool
First Claim
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1. A system for removing deposits from a partially or totally occluded stent, comprising:
- a cutter that is insertable in the stent and when rotated removes deposits from the partially or totally occluded stent; and
means for urging the cutter radially outward toward the inner wall of the stent when the cutter is within the stent.
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Abstract
A system for removing matter from a partially or totally occluded stent includes a cutter that is urged radially outward toward the inner surface of the stent. Preferably, the cutter has a hardness that is less than or equal to the hardness of the material used to make the stent. Aspiration may be provided to remove portions of the occluding material from the vessel.
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Citations
14 Claims
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1. A system for removing deposits from a partially or totally occluded stent, comprising:
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a cutter that is insertable in the stent and when rotated removes deposits from the partially or totally occluded stent; and
means for urging the cutter radially outward toward the inner wall of the stent when the cutter is within the stent. - View Dependent Claims (2, 3, 4)
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5. A system for removing deposits from a partially or totally occluded stent, comprising:
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a cutter having a hardness less than or equal to a hardness of the stent, the cutter having one or more recessed blades within one or more channels on the surface of the cutter to cut occluding matter that enters the recesses; and
a guide wire having a shape that directs the cutter radially outward toward an inner wall of the stent as the cutter is passed over it.
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6. A system for removing deposits from a partially or totally occluded stent, comprising:
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a catheter having an expandable stent at its distal end; and
one or more cutting blades secured to an edge of the expandable stent, the cutting blade having a hardness that is less than or equal to the hardness of the occluded stent;
wherein the expandable stent is expandable within the occluded stent such that the one or more cutting blades are urged toward an inner wall of the occluded stent and wherein the catheter and one or more cutting blades are rotatable to remove an occlusion from the occluded stent.
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7. A system for removing deposits from a partially or totally occluded stent, comprising:
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an expandable cutter disposed over a guide wire; and
a balloon that expands to urge the cutter radially outward, wherein the balloon is inflated when the cutter is within the occluded stent to urge the cutter toward an inner wall of the occluded stent, the expandable cutter being rotatable in the occluded stent to remove occluding matter. - View Dependent Claims (8, 9, 10)
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11. A method for removing restenotic tissue from within a stent, comprising:
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advancing a cutter into the stent, the cutter including means for preventing damage to the stent;
rotating the cutter; and
aspirating ablated particles of the restenotic tissue. - View Dependent Claims (12, 13, 14)
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Specification