Expandable intravascular occlusion material removal devices and methods of use
First Claim
1. A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, comprising:
- a removal element having a proximal end and a distal end, and having a surface and an abrasive coating disposed thereon; and
a distal tip located at said distal end of said removal element, said distal tip having a surface being less abrasive than said surface of said removal element having an abrasive coating, wherein said abrasive surface of said removal element is comprised of a plurality of strands which arc braided together wherein each one of said plurality of strands comprises at least one wire.
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Accused Products
Abstract
An improved expandable removal element (16) for an atherectomy device wherein the expandable removal element (16) is movable between an expanded position and a contracted position. In one embodiment of the present invention, a single drive shaft (92) is operatively connected to the distal end of the expandable material removal element (16) for rotating the removal element (16). A catheter (178) may surround a portion of the drive shaft (92). The catheter (178) is shiftable with respect to the drive shaft (92) for moving the material removal element between the expanded position and the contracted position. In another embodiment of the present invention, dual coaxial drive shafts are employed. The inner drive shaft (312) and the outer drive (314) are shiftable with respect to one another for moving the removal element (252) between the expanded position and the contracted position. The present invention also describes several embodiments for an improved removal element (252).
647 Citations
12 Claims
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1. A vascular occlusion material removal device for removing vascular occlusion material in a vascular lumen, comprising:
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a removal element having a proximal end and a distal end, and having a surface and an abrasive coating disposed thereon; and a distal tip located at said distal end of said removal element, said distal tip having a surface being less abrasive than said surface of said removal element having an abrasive coating, wherein said abrasive surface of said removal element is comprised of a plurality of strands which arc braided together wherein each one of said plurality of strands comprises at least one wire. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification