Ablation burr

• US 6,146,395 A
• Filed: 03/04/1999
• Issued: 11/14/2000
• 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: Barry, Robert, Wulfman, Edward, Swinford, Gary, Kanz, Bill, Kadavy, Tom, Drummond, Denise, Hirst, Paul A., Clement, Tom, Wyzgala, Mark
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): King, Anthony S.
• Application Number:
  US09/262,502
• Time in Patent Office: 621 Days
• Field of Search: 606/159, 606/108, 606/170, 606/194, 604/523, 604/49, 604/96
• 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 which can be drawn proximally to engage with a burr deflector surface of the drive shaft in order to be displaced transversely to remove plaque.

Claims

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.

2. A catheter assembly in accordance with claim 1, wherein the burr engaging surface is disposed at an angle greater than zero degrees relative to the length of the elongate shaft.

3. The catheter assembly in accordance with claim 1, wherein the burr includes a burr deflector engaging surface disposed at an angle greater than zero degrees relative to the length of the drive shaft.

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