Cutting wire assembly for use with a catheter

• US 9,615,849 B2
• Filed: 06/13/2015
• Issued: 04/11/2017
• Est. Priority Date: 11/18/2010
• Status: Expired due to Fees

• Current Assignee: REX Medical LP
• Original Assignee: REX Medical LP
• Inventors: McGuckin, Jr., James F., Schur, Israel, Bressler, James Erich
• Primary Examiner(s): FISHBACK, ASHLEY LAUREN
• Application Number:
  US14/738,856
• Publication Number:
  US 20150272613A1
• Time in Patent Office: 668 Days
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 2017/22001 Angioplasty, e.g. PCTA
• CPC Class Codes: A61B 2017/22038 with a guide wire
• CPC Class Codes: A61B 2017/22051 with an inflatable part, e.g. balloon, for positioning, blocking, or immobilisation A61B2017/22048, A61B2017/3486 take precedence

Abstract

A method of treating a lesion in a body lumen to enlarge a passageway in the lumen including inserting a plurality of cutting members and a tracking member through a first lumen of a catheter, withdrawing the catheter from the cutting members and tracking member, inserting the catheter over the tracking member and leaving the cutting members outside the catheter, and expanding a portion of the catheter to move the cutting members into cutting contact with the lesion. A device for treating a lesion in a body lumen including a plurality of cutting members and a tracking member is also provided.

Claims

1. A system for treating a lesion in body lumen to enlarge a passageway in the body lumen comprising:

a catheter having a lumen and an expandable portion; and

a cutting assembly including a plurality of cutting members and a tracking member, the tracking member attached to at least one of the cutting members, wherein the expandable portion of the catheter is expandable to move the cutting members in a direction transverse to a longitudinal axis of the tracking member, each of the cutting members having a proximal portion and a distal portion, the proximal portions extending outside the patient when the cutting members are positioned in the body lumen adjacent the lesion, the plurality of cutting members having a cutting surface configured to treat the lesion to enlarge the passageway in the body lumen when moved by the expandable portion of the catheter.

2. The system of claim 1, wherein at least one of the cutting members and the tracking member are connected at distal regions thereof.

3. The device of claim 1, wherein the tracking member has a coil at a distal end, and a shrink wrap is positioned over a connection region of the cutting member and tracking member.

4. The system of claim 1, wherein the cutting surface is substantially triangular in cross-section.

5. The device of claim 1, wherein the cutting members are wires and the tracking member is a wire.

6. The system of claim 1, wherein the cutting members have a first proximal portion of a first continuous configuration and a second distal portion of a second continuous configuration, the second portions including the cutting surface and the first portions being atraumatic.

7. The system of claim 6, wherein a height of the distal portion of the cutting members is less than a height of the proximal portion of the cutting members.

8. The system of claim 1, wherein the expandable portion comprises an inflatable balloon.

9. The system of claim 1, wherein the tracking member includes a plurality of marker bands.

10. The system of claim 1, wherein the cutting members have a second surface opposite the cutting surface the second surface facing the tracking member.

11. The system of claim 1, wherein the cutting members are circular in a region proximal of the cutting surface.

12. The system of claim 1, wherein the cutting members have a proximal region of a height greater than a height of a distal region, the cutting surface being at the distal region.