Cutting wire assembly for use with a catheter

• US 8,702,736 B2
• Filed: 09/07/2011
• Issued: 04/22/2014
• Est. Priority Date: 11/22/2010
• Status: Expired due to Fees

• Current Assignee: REX Medical LP
• Original Assignee: REX Medical LP
• Inventors: Schur, Israel, McGuckin, James F. Jr., Bressler, James Erich
• Primary Examiner(s): FISHBACK, ASHLEY LAUREN
• Application Number:
  US13/226,708
• Publication Number:
  US 20120130409A1
• Time in Patent Office: 958 Days
• Field of Search: 604/93.01, 604/96.01, 60410101-10105, 606/159, 606167-171, 606/180, 606/191, 606/192
• 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 17/32075 Pullback cutting; combined forward and pullback cutting, e.g. with cutters at both sides of the plaque
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22045 fixed to the catheter; guiding tip
• CPC Class Codes: A61B 2017/22061 for spreading elements apart
• 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 2017/320741 for stripping the intima or the internal plaque from a blood vessel, e.g. for endarterectomy
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

A method of treating a lesion in a body lumen to enlarge a passageway in the lumen including providing a cutting member, connecting a tracking member to the cutting member to form an assembly, inserting the connected cutting member and tracking member through a first lumen of a catheter, withdrawing the catheter from the cutting member and tracking member, inserting the catheter over the tracking member and leaving the cutting member outside the catheter, and expanding a portion of the catheter to move the cutting member into cutting contact with the lesion. A device for treating a lesion in a body lumen including a cutting member having a coupler to connect a tracking member is also provided.

Claims

1. A method of treating a lesion in a body lumen of a patient'"'"'s body, the method comprising:

providing a cutting member;

connecting a tracking member to the cutting member to form an assembly;

inserting the connected cutting member and tracking member into the body lumen;

subsequently inserting a catheter over a proximal end of the tracking member extending outside the patient'"'"'s body so the tracking member extends through a first lumen of the catheter and the cutting member does not extend through the first lumen; and

moving the cutting member away from the tracking member into cutting contact with the lesion to enlarge a passageway in the body lumen.

2. The method of claim 1, wherein the step of inserting the connected cutting member and tracking member comprises a step of inserting the cutting member and tracking member through a lumen of the same catheter subsequently inserted over the tracking member.

3. The method of claim 1, wherein the step of moving the cutting member comprises a step of expanding a balloon of the catheter.

4. The method of claim 1, wherein the step of connecting the cutting and tracking members includes a step of attaching a distal portion of the tracking member to a coupler attached at a distal portion of the cutting member.

5. The method of claim 1, wherein the cutting member is a wire and the tracking member is a wire.

6. The method of claim 1, wherein the step of connecting the tracking member to the cutting member comprises a step of inserting the tracking member through a collar positioned at a distal portion of the cutting member.

7. The method of claim 1, wherein the cutting member has a first portion of a first configuration and a second portion of a second configuration, the second portion including a cutting surface and the first portion being atraumatic, the second portion being distal of the proximal portion.

8. A method of treating a lesion in a body lumen, the method comprising:

providing a cutting member;

connecting a tracking member to the cutting member to form an assembly;

inserting the connected cutting member and tracking member into the body lumen;

inserting a catheter over the tracking member so the tracking member extends through a first lumen of the catheter and the cutting member does not extend through the first lumen; and

moving the cutting member away from the tracking member into cutting contact with the lesion to enlarge a passageway in the body lumen;

wherein the step of inserting the connected cutting member and tracking member comprises the step of inserting the cutting member and tracking member through a lumen of an angioplasty catheter, the angioplasty catheter being different than the catheter inserted over the tracking member.