Shaped wire multi-burr rotational ablation device
First Claim
Patent Images
1. A shaped wire rotational ablation system comprising:
- (a) a shaped guidewire having proximal and distal portions, the distal portion of the shaped guidewire being preformed into a corkscrew shape or a gentle "S" shape curve;
(b) a flexible, hollow drive shaft defining a lumen and having a rotatable abrasive tip attached thereto, said tip having a diameter which is greater than that of said drive shaft and said tip having a substantially cylindrical opening in fluid communication with said drive shaft lumen so that said drive shaft and tip can be guided along said guidewire, said drive shaft having affixed along the distal portion thereof a multiplicity of cutting surfaces;
(c) an abrasive surface on said cutting surfaces, said abrasive surface being comprised of abrasive material imbedded in, attached to, or machined from said tip; and
(d) a rotatable prime mover which is capable of rotating said drive shaft at a rotation rate of from about 10,000 revolutions per minute to as high as about 225,000 revolutions per minute, whereby said abrasive material microdissects particles small enough to pass through the capillaries of a person.
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Abstract
The invention is a device for medical applications for differentially cutting abnormal deposits from within a patient'"'"'s vessels. The device comprises one or more diamond plated burrs or cuffs attached to a flexible drive shaft which rotates at a high speed. The drive shaft is placed over a preformed shaped guidewire so that the drive shaft conforms to the shape of the guidewire, which has been preformed into a gentle "S" or "cork-screw" shape. The guidewire may be rotated at low speed.
381 Citations
29 Claims
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1. A shaped wire rotational ablation system comprising:
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(a) a shaped guidewire having proximal and distal portions, the distal portion of the shaped guidewire being preformed into a corkscrew shape or a gentle "S" shape curve; (b) a flexible, hollow drive shaft defining a lumen and having a rotatable abrasive tip attached thereto, said tip having a diameter which is greater than that of said drive shaft and said tip having a substantially cylindrical opening in fluid communication with said drive shaft lumen so that said drive shaft and tip can be guided along said guidewire, said drive shaft having affixed along the distal portion thereof a multiplicity of cutting surfaces; (c) an abrasive surface on said cutting surfaces, said abrasive surface being comprised of abrasive material imbedded in, attached to, or machined from said tip; and (d) a rotatable prime mover which is capable of rotating said drive shaft at a rotation rate of from about 10,000 revolutions per minute to as high as about 225,000 revolutions per minute, whereby said abrasive material microdissects particles small enough to pass through the capillaries of a person. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A shaped wire rotational ablation system comprising:
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(a) a substantially linear guidewire having proximal and distal ends; (b) a shaped hypotube having proximal and distal portions, the distal portion of the shaped hypo tube being pre-formed into a corkscrew shape or a gentle "S" shape curve and the shaped hypo tube fitting slidingly over the guidewire; (c) a flexible, hollow drive shaft defining a lumen and having a rotatable abrasive tip attached thereto, said tip having a diameter which is greater than that of said drive shaft and said tip having a substantially cylindrical opening in fluid communication with said drive shaft lumen so that said drive shaft and tip can be guided along said guidewire and said shaped hypo tube, said drive shaft having affixed along the distal portion thereof a multiplicity of cutting surfaces; (d) an abrasive surface on said cutting surfaces, said abrasive surface being comprised of abrasive material imbedded in, attached to, or machined from said tip; and (e) a rotatable prime mover which is capable of rotating said drive shaft at a rotation rate of from about 10,000 revolutions per minute to as high as about 225,000 revolutions per minute, whereby said abrasive material microdissects particles small enough to pass through the capillaries of a person. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. A method of removing a stenotic lesion in a corporal vessel, which comprises the steps of:
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(a) advancing the distal end of a guidewire into a vessel until the distal end of the guidewire is adjacent to or distal to the lesion; (b) threading distally over the guidewire a hypo tube wherein the distal end of the hypo tube has a preformed, corkscrew shape or a gentle "S" shape curve, until the distal end of the hypo tube is positioned across the lesion; (c) threading distally over the hypo tube a flexible drive shaft having one or more cutting surfaces arranged on the exterior surface of its distal portion, until the distal end of the flexible drive shaft is proximal to the lesion; and (d) rotating the flexible drive shaft or both the flexible drive shaft and the shaped hypotube while longitudinally moving the drive shaft and optionally the guidewire to cause the cutting surface to cut into the lesion to create microparticles.
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27. A method of removing a stenotic lesion in a corporal vessel, which comprises the steps of:
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(a) advancing the distal end of a guidewire into a vessel until the distal end of the guidewire is adjacent to or distal to the lesion, the distal portion of the guidewire being pre-formed into a corkscrew shape or a gentle "S" shape curve; (b) threading distally over the guidewire a flexible drive shaft having one or more cutting surfaces arranged on the exterior surface of its distal portion, until the distal end of the flexible drive shaft is proximal to the lesion; and (c) rotating the flexible drive shaft or both the flexible drive shaft and the shaped guidewire while longitudinally moving the drive shaft and optionally the guidewire to cause the cutting surface to cut into the lesion to create microparticles.
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28. A shaped wire rotational ablation system comprising:
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(a) a shaped guidewire having proximal and distal portions, the distal portion of the shaped guidewire being pre-formed into a non-linear shape; (b) a flexible, hollow drive shaft defining a lumen and having a rotatable abrasive tip attached thereto, said tip having a diameter which is greater than that of said drive shaft and said tip having a substantially cylindrical opening in fluid communication with said drive shaft lumen so that said drive shaft and tip can be guided along said guidewire, said drive shaft having affixed along the distal portion thereof a multiplicity of cutting surfaces; (c) an abrasive surface on said cutting surfaces, said abrasive surface being comprised of abrasive material imbedded in, attached to, or machined from said tip; (d) a rotatable prime mover attached to the proximal portion of the guidewire for rotating the guidewire; and (e) a rotatable prime mover which is capable of rotating said drive shaft at a rotation rate of from about 10,000 revolutions per minute to as high as about 225,000 revolutions per minute, whereby said abrasive material microdissects particles small enough to pass through the capillaries of a person.
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29. A shaped wire rotational ablation system comprising:
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(a) a shaped guidewire having proximal and distal portions, the distal portion of the shaped guidewire being pre-formed into a non-linear shape; (b) a flexible, hollow drive shaft defining a lumen and having a rotatable abrasive tip attached thereto, said tip having a diameter which is greater than that of said drive shaft and said tip having a substantially cylindrical opening in fluid communication with said drive shaft lumen so that said drive shaft and tip can be guided along said guidewire, said drive shaft having affixed along the distal portion thereof a multiplicity of cutting surfaces; (c) an abrasive surface on said cutting surfaces, said abrasive surface being comprised of abrasive material imbedded in, attached to, or machined from said tip; (d) a rotatable prime mover which is capable of rotating said drive shaft at a rotation rate of from about 10,000 revolutions per minute to as high as about 225,000 revolutions per minute, whereby said abrasive material microdissects particles small enough to pass through the capillaries of a person; and (e) a guidewire brake attached to the proximal portion of the guidewire, wherein said guidewire brake can move longitudinally in concert with the rotatable prime mover.
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Specification