Atherectomy device for reducing damage to vessels and/or in-vivo stents

• US 6,156,048 A
• Filed: 08/02/1999
• Issued: 12/05/2000
• Est. Priority Date: 03/06/1997
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Chandrasekaran, Verivada, Gordon, Lucas, Barry, Robert, Shuman, Brandon, Dillard, David, Wulfman, Edward
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US09/365,188
• Time in Patent Office: 491 Days
• Field of Search: 606/159, 606/180, 606/170, 606/171, 606/168, 604/22
• US Class Current: 606/159
• 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 2017/320004 abrasive

Abstract

An atherectomy device that may reduce the risk of damage to a vessel wall. One rotatable atherectomy burr has a recessed material removal portion lying between less abrasive proximal and distal shoulders. The shoulders can have a straight, rounded or elliptical taper. The shoulders can perform a cam action when the burr is canted is a vessel, as when passing the burr and guide wire through a tortuous, stenosed vessel path. The shoulders act to align the burr with the path through the vessel, presenting the less abrasive shoulders to the vessel wall while presenting the abrasive portion to a stenosis.

Claims

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

a solid burr body having a distal and a proximal end and a leading concave surface, the leading concave surface extending from a generally smooth distal tip to a smooth shoulder that is proximal to the distal tip, wherein the concave surface has a radius about a central axis of the burr that lies beneath an imaginary line that extends between the distal tip and the smooth shoulder; and

an abrasive on the concave surface that removes deposits from the patient'"'"'s vessel or stent.

2. The ablation burr of claim 1, wherein the burr body includes a convex outer surface that extends from the end point of the leading concave surface to the proximal end of the burr.

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

a burr body having a distal and a proximal end and a leading concave surface, the leading concave surface extending from a generally smooth distal tip to a smooth shoulder that is proximal to the distal tip, wherein the concave surface has a radius about a central axis of the burr that is entirely below an imaginary line that extends between the distal tip and the smooth shoulder; and

an abrasive on the concave surface that removes deposits from the patient'"'"'s vessel or stent.