Method and apparatus for treating vein graft lesions

• US 6,579,298 B1
• Filed: 02/29/2000
• Issued: 06/17/2003
• Est. Priority Date: 02/29/2000
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Torrance, Casey, Peskin, Natalya, Werner, Dennis, Wyzgala, Mark, Bruneau, Rodney J., Johnson, Tim J., Uhrberg, Andy, Morey, Robert, Hefner, Matthew, Cran, Brian T., Barry, Robert L., Guo, Zihong
• Primary Examiner(s): KENNEDY, SHARON E
• Application Number:
  US09/514,664
• Time in Patent Office: 1,204 Days
• Field of Search: 606/1, 606/159, 606/170, 606/171, 606/180, 606/20, 606/85, 606/161, 606/167, 604/22
• US Class Current: 606/159
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• 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 2017/00685 Archimedes screw
• CPC Class Codes: A61B 2017/22067 Blocking; Occlusion A61B2017/22054 takes precedence
• CPC Class Codes: A61B 2017/320004 abrasive
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels

Abstract

A system for ablating material in vein grafts includes an ablation burr that is rotated by a driveshaft. The ablation burr preferably includes one or more channels, blades or other mechanisms that direct ablated material and liquid proximally and/or outwardly against a vessel wall. Aspiration is used to remove ablated material and liquid from the treatment area. Finally, methods for treating vein grafts and original native arteries are disclosed.

Claims

1. An ablation burr for removing deposits from a patient'"'"'s vessel, comprising:

a burr body adapted to be rotated by a driveshaft, at least a portion of the burr body having an abrasive surface;

the burr body further including a lumen extending at least partially through the burr body, a proximal and distal radially expanded portion and a middle region between the distal and proximal radially expanded portion having a diameter that is everywhere less than the diameter of the proximal and distal portion, the middle region further including an aspiration port in fluid communication with the lumen in the burr body.

2. The ablation burr of claim 1, wherein the drive shaft that rotates the burr body is sealed.

3. The ablation burr of claim 1, wherein the burr body creates a low pressure region adjacent to the aspiration port as the burr body is rotated in a vessel.

4. A method of removing deposits from a vessel in a patient'"'"'s body, comprising:

advancing an ablation burr into a vessel, the burr having a burr body at least a portion of which has an abrasive outer surface, a lumen extending at least partially therethrough, a proximal and a distal radially expanded portion, a middle region between the proximal and distal radially expanded portion having a diameter that is everywhere less than the diameter of the proximal and distal radially expanded portion and an aspiration port within the middle region that is in fluid communication with the lumen;

rotating the ablation burr with a driveshaft;

engaging the rotating burr with deposits in the vessel; and

aspirating ablated deposits through the aspiration port.