Ablation burr
First Claim
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1. A catheter assembly, comprising:
- an elongate shaft having a proximal end and a distal end, the shaft defining a lumen therethrough;
a burr deflector disposed at the distal end of the shaft, the burr deflector including a burr engaging surface;
an elongate drive shaft extending through the lumen, the drive shaft having a proximal end and a distal end; and
a burr disposed at the distal end of the drive shaft, the drive shaft and burr being shiftable relative to the burr deflector between a first position and a second position, wherein the burr is transversely shifted relative to the burr-deflector.
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Abstract
A catheter including an elongate drive shaft having a proximal end and a distal end, an ablation burr disposed at the distal end expandable between a first position and a second position, wherein in the second position has a greater transverse dimension than in the first position. The catheter of the present invention can include a mechanism for positioning the burr eccentrically within a vessel lumen. In this context, expansion means that the burr can ablate a lumen having a larger diameter than the diameter of the lumen of the guide catheter to which the device is advanced.
118 Citations
32 Claims
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1. A catheter assembly, comprising:
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an elongate shaft having a proximal end and a distal end, the shaft defining a lumen therethrough;
a burr deflector disposed at the distal end of the shaft, the burr deflector including a burr engaging surface;
an elongate drive shaft extending through the lumen, the drive shaft having a proximal end and a distal end; and
a burr disposed at the distal end of the drive shaft, the drive shaft and burr being shiftable relative to the burr deflector between a first position and a second position, wherein the burr is transversely shifted relative to the burr-deflector. - View Dependent Claims (2, 3, 4)
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5. A catheter assembly, comprising:
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an elongate shaft having a proximal end and a distal end, the shaft defining a lumen;
an elongate drive shaft extending through the lumen, the drive shaft having a proximal end and a distal end;
a burr disposed at the distal end of the drive shaft;
a bushing disposed around the drive shaft proximate the burr; and
a steering line having a proximal end and a distal end, the distal end being connected to the bushing. - View Dependent Claims (6, 7)
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8. A catheter assembly, comprising:
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an elongate drive shaft having a proximal end and a distal end;
means for ablating disposed at the distal end of the drive shaft, the means for ablating including means for transverse expansion of a portion of the ablation means by centrifugal force when the burr rotates. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A catheter assembly, comprising:
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an elongate drive shaft having a proximal end and a distal end, and defining a lumen therethrough;
a balloon including an outer surface, and defining a balloon enclosure; and
an abrasive disposed on the outer surface of the balloon. - View Dependent Claims (17, 18, 19)
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20. A catheter assembly, comprising:
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an elongate shaft having a proximal end and a distal end, the shaft defining a drive shaft lumen and an inflation lumen;
a drive shaft having a proximal and a distal end, the drive shaft being disposed in the drive shaft lumen;
an ablating burr disposed at the distal end of the drive shaft; and
a balloon disposed eccentrically on the shaft proximate the burr. - View Dependent Claims (21, 22)
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23. The catheter assembly, comprising:
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an elongate drive shaft having a proximal end and a distal end; and
an ablated burr eccentrically connected to the drive shaft at the distal end thereof. - View Dependent Claims (24, 25)
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26. The catheter assembly, comprising:
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an elongate shaft having a proximal end and a distal end and defining a lumen therethrough;
a drive shaft having a proximal end and a distal end and extending through the lumen; and
an ablated burr including a plurality of spring members, the drive shaft and the burr being shiftable between a first position and a second position, in the first position the spring members being disposed at least in part within the lumen and being transversely restrained thereby, in the second position the spring members being transversely restrained less than in the first position such that the burr has a greater transverse dimension in the second position than in the first position. - View Dependent Claims (27, 28, 29)
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30. The catheter assembly, comprising:
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an elongate drive shaft having a proximal and a distal end and a generally helically shaped portion proximate the distal end; and
an abrasive disposed on the helically shaped portion. - View Dependent Claims (31)
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32. A method of performing atherectomy, comprising the steps of:
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providing a catheter having an elongate drive shaft having a proximal and a distal end, and an ablation burr disposed at the distal end;
positioning the burr eccentrically within a blood vessel; and
rotating the burr.
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Specification