Cutting wire assembly for use with a catheter

• US 10,548,627 B2
• Filed: 03/18/2017
• Issued: 02/04/2020
• Est. Priority Date: 11/18/2010
• 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:
  US15/462,843
• Publication Number:
  US 20170189057A1
• Time in Patent Office: 1,053 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 device for treating a lesion in a body lumen to enlarge a passageway in the body lumen, the device comprising a plurality of cutting members having a proximal portion and a distal portion and a tracking member having a proximal portion and a distal portion, the tracking member dimensioned to receive a catheter thereover, the cutting members and tracking member being connected at the distal portion and insertable into the vessel as a unit, the cutting members having a proximal portion extending outside the patient when positioned in the body lumen adjacent the lesion, the cutting members configured for movement in a direction transverse to a longitudinal axis of the tracking member to widen a gap between the cutting members and tracking member at least at a distal region.

2. The device of claim 1, wherein the cutting members have a cutting surface on a first surface opposite a second surface facing the tracking member.

3. The device of claim 2, wherein the second surface has a convex surface.

4. The device of claim 1, wherein the cutting surface is formed only in a distal region of the cutting members.

5. The device of claim 4, wherein the cutting members have a proximal substantially circular cross sectional region and a non-circular distal region.

6. The device of claim 2, wherein the cutting surface has a flat edge.

7. 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.

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

9. The device of claim 1, wherein the cutting members move on opposite sides of the tracking member.

10. The device of claim 1, wherein the cutting members have 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.

11. The device of claim 10, wherein a height of the second portion is less than a height of the first portion.

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

13. The device of claim 12, wherein the cutting members have a cutting surface on a first surface opposite a second surface facing the tracking member.

14. The device of claim 1, wherein a length of the tracking member exceeds a length of the cutting members.

15. The device of claim 1, wherein the tracking member extends distally of the cutting members.

16. The device of claim 1, wherein the cutting members are external to the tracking member along their length.

17. The device of claim 1, wherein the cutting members are external of and radially spaced from the tracking member along a proximal region.

18. The device of claim 17, wherein the proximal region is an exposed region proximal of a cutting surface of the cutting member.

19. The device of claim 18, wherein the proximal region is atraumatic.