Steerable ablation burr

• US 6,596,005 B1
• Filed: 09/26/2000
• Issued: 07/22/2003
• Est. Priority Date: 03/05/1998
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Swinford, Gary, Kanz, Bill, Kadavy, Tom, Drummond, Denise, Hirst, Paul A., Clement, Tom, Barry, Robert, Wulfman, Edward, Wyzgala, Mark
• Primary Examiner(s): Milano, Michael J.
• Assistant Examiner(s): Baxter, Jessica R
• Application Number:
  US09/670,416
• Time in Patent Office: 1,029 Days
• Field of Search: 606/1, 606/159, 606/170, 606/171, 606/180, 606/108, 606/194, 604/22, 604/96, 604/523, 604/49, 604/95.04
• US Class Current: 606/159
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 17/320758 with a rotating cutting instrument, e.g. motor driven A61B17/320725, A61B17/32075 and A61B17/320783 take precedence; for removing intra-ocular material A61F9/00763; endoscopic rotatable cutting instruments A61B17/32002
• CPC Class Codes: A61B 2017/003 Steerable
• CPC Class Codes: A61B 2017/00557 inflatable A61B2017/22051 takes precedence
• CPC Class Codes: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/320004 abrasive
• CPC Class Codes: A61B 2017/320733 with a flexible cutting or scraping element, e.g. with a whip-like distal filament member
• CPC Class Codes: A61B 2017/320766 eccentric

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.

Claims

1. A catheter assembly, comprising:

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 that engages the burr and directs the burr within a vessel, and

a steering line having a proximal end and a distal end, the distal end being connected to the bushing.

2. A catheter assembly in accordance with claim 1, further comprising a second steering line.

3. The catheter assembly in accordance with claim 1, wherein the burr includes an abrasive surface.

4. The catheter assembly of claim 1, wherein the bushing and the burr are rotatably coupled.

6. The method of claim 4, wherein the bushing is urged against the burr by manipulating one or more steering wires coupled to the bushing.

5. A method of removing deposits from a vascular lumen, comprising:

inserting a catheter having a proximal end, a distal end, and one or more lumens extending therethrough into a vascular lumen;

inserting an atherectomy device through a lumen in the catheter, the atherectomy device having a tissue removal burr, a driveshaft that rotates the tissue removal burr, and a bushing that is proximal to the tissue removal burr; and

urging the bushing against the tissue removal burr as the burr is being rotated by the drive shaft to deflect the burr and selectively engage and remove deposits in the vascular lumen.