Cutting wire assembly for use with a catheter

• US 10,327,802 B2
• Filed: 12/30/2016
• Issued: 06/25/2019
• Est. Priority Date: 10/06/2010
• Status: Active Grant

• Current Assignee: REX Medical LP
• Original Assignee: REX Medical LP
• Inventors: Schur, Israel, McGuckin, Jr., James F., Bressler, James Erich
• Primary Examiner(s): Fishback, Ashley L
• Application Number:
  US15/394,957
• Publication Number:
  US 20170105759A1
• Time in Patent Office: 907 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 2017/22061 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 method of treating a lesion in a body lumen in a patient'"'"'s body, the method comprising:

a) inserting a cutting member and tracking member through a first lumen of a first catheter;

b) withdrawing the first catheter from the cutting member and tracking member and removing the first catheter from the body lumen;

c) after step (b) inserting either the first catheter or a second different catheter over the tracking member and the cutting member remaining outside the catheter during insertion of the catheter; and

d) after step (c) expanding a portion of the catheter inserted over the tracking member in step (c) to move the cutting member radially into cutting contact with the lesion to thereby enlarge a passageway in the body lumen.

2. The method of claim 1, wherein the portion of the catheter to move the cutting member includes an expandable balloon, and the step of expanding a portion of the catheter includes the step of expanding the balloon.

3. The method of claim 2, wherein the step of expanding the balloon causes the cutting member to be moved radially with respect to the catheter.

4. The method of claim 1, wherein the step of expanding a portion of the catheter causes a gap between the cutting member and tracking member to widen.

5. The method of claim 1, wherein the cutting member has a cutting surface on a first surface opposite a second surface facing the tracking member, and expansion of a portion of the catheter forces the cutting surface into contact with the lesion.

6. The method of claim 1, wherein the cutting member and tracking member are attached at a distal end and inserted as a unit in step (a) through the first lumen of the first catheter.

7. The method of claim 1, wherein a proximal end of the cutting member extends outside the patient'"'"'s body.

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

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

10. The method of claim 1, further comprising marker bands on the tracking member.

11. The method of claim 1, wherein a distal end of the tracking member is distal of a distal end of the catheter during the step of expanding a portion of the catheter.

12. The method of claim 1, wherein a distal end of the cutting member is distal of a distal end of the catheter during the step of expanding a portion of the catheter.

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

inserting a cutting member and tracking member into the body lumen, the tracking member extending outside the body lumen;

inserting a catheter over an exposed proximal end of the tracking member so the tracking member extends through a first lumen of the catheter and the cutting member is adjacent the catheter and does not extend through the first lumen; and

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

14. The method of claim 13, wherein the step of inserting a 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.

15. The method of claim 13, wherein the step of inserting a 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.

16. The method of claim 13, wherein the step of moving the cutting member comprises a step of expanding a balloon of the catheter.

17. The method of claim 13, wherein the cutting member and tracking member are attached at a distal end and inserted as a unit into the body lumen.

18. The method of claim 13, wherein the cutting member has a proximal end extending outside the patient'"'"'s body.

19. The method of claim 13, wherein a distal end of the tracking member is distal of a distal end of the catheter during the step of expanding a portion of the catheter.

20. The method of claim 13, wherein a distal end of the cutting member is distal of a distal end of the catheter during the step of expanding a portion of the catheter.