Cutting wire assembly for use with a catheter

• US 9,532,798 B2
• Filed: 06/13/2015
• Issued: 01/03/2017
• Est. Priority Date: 10/06/2010
• 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:
  US14/738,857
• Publication Number:
  US 20150272614A1
• Time in Patent Office: 570 Days
• US Class Current: 1/1
• 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 2017/22061 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 2034/2046 Tracking techniques
• CPC Class Codes: A61B 34/20 Surgical navigation systems; Devices for tracking or guiding surgical instruments, e.g. for frameless stereotaxis
• 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 inserting a 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 and tracking member is also provided.

Claims

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

a catheter having a lumen and an expandable portion; and

a cutting assembly including a cutting member and a tracking member, the tracking member attached to the cutting member, wherein the expandable portion of the catheter is expandable to move the cutting member in a direction transverse to a longitudinal axis of the tracking member, the cutting member having a proximal portion and a distal portion, the proximal portion configured to extend outside the patient when the cutting member is positioned in the body lumen adjacent the lesion, the cutting member 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 the cutting member and tracking member are connected at distal regions thereof.

3. The system of claim 2, wherein the expandable portion comprises an inflatable balloon.

4. The device of claim 1, wherein the tracking member has a coil at a distal end, and a heat shrink is positioned over an attachment region of the cutting member and tracking member.

5. The device of claim 1, wherein the tracking member includes a plurality of marker bands.

6. The system of claim 1, wherein the cutting member at a cutting region is substantially triangular in cross-section.

7. The system of claim 6, wherein the cutting member is circular in region proximal of the cutting region.

8. The system 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.

9. The system of claim 8, wherein a height of the first portion is less than a height of the second portion.

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

11. The system of claim 1, wherein the cutting member is a wire.

12. The system of claim 11, wherein the tracking member is a wire.

13. The system of claim 1, wherein the tracking member is a wire.

14. The system of claim 1, wherein the cutting member has a proximal region of greater height than a distal region.