Device and method for converting a balloon catheter into a cutting ballon catheter

• US 20040193196A1
• Filed: 08/13/2003
• Published: 09/30/2004
• Est. Priority Date: 03/25/2003
• Status: Active Grant

• Current Assignee: AngioDynamics, Inc.
• Original Assignee: AngioDynamics, Inc.
• Inventors: Appling, William M., Schur, Israel, Palma, Giorgio di
• Granted Patent: US 7,131,981 B2
• Time in Patent Office: Days
• US Class Current: 606/167
• 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

Abstract

A lesion treating device for converting a standard balloon catheter into a cutting balloon catheter is provided. The device includes a longitudinal housing such as a tube which is sized to be inserted into a lumen of the balloon catheter and cutting wires disposed within the longitudinal housing in an undeployed position. When the longitudinal housing is moved relative to the cutting wires, the cutting wires extend out of the longitudinal housing. The balloon of the balloon catheter is then moved under the deployed cutting wires and inflated to convert the standard balloon catheter into the cutting balloon catheter.

Claims

1. A lesion treating device for use with an intraluminal device having an expandable member, comprising:

a longitudinal housing operable to be inserted into a lumen of an intraluminal device having an expandable member; and

a wire coupled to the longitudinal housing, the wire having an undeployed position and a deployed position wherein the wire extends outside of the longitudinal housing to be positioned between an inner wall of a body lumen and the expandable member of the intraluminal device.

2. The device according to claim 1, wherein:

the longitudinal housing includes an opening in its sidewall; and

when the longitudinal housing is longitudinally moved with respect to the wire, a first end of the wire extends through the opening into the deployed position.

3. The device according to claim 2, further comprising a shaft positioned inside the longitudinal housing and attached to a second end of the wire, wherein the wire in the undeployed position is disposed fully inside the exterior surface of the longitudinal housing.

4. The device according to claim 3, wherein when the longitudinal housing is longitudinally moved while the shaft is held stationary, the first end of the wire extends through the opening into the deployed position without moving longitudinally.

5. The device according to claim 2, further comprising a guide disposed within the longitudinal housing and having a guide channel in communication with the opening, the guide channel guiding the wire when the wire is being extended out of the opening.

6. The device according to claim 1, wherein the wire includes a longitudinal blade having a cutting edge that points toward a body lumen wall when the wire is extended into the deployed position.

7. The device according to claim 1, wherein the wire is round and contains no cutting edge.

8. The device according to claim 2, wherein when the longitudinal housing is proximally moved with respect to the wire, the wire is retracted through the opening into the undeployed position.

9. The device according to claim 1, wherein a distal portion of the lesion treating device has a predetermined curve profile.

10. A lesion treating device for use with a balloon catheter, comprising:

a longitudinal housing operable to be inserted into a lumen of a balloon catheter, the longitudinal housing having at least one opening in a sidewall; and

at least one wire positioned within the longitudinal housing in an undeployed position;

wherein when the longitudinal housing moves with respect to the at least one wire, one end of the at least one wire extends out from the longitudinal housing through the at least one opening to be positioned between an inner wall of a body lumen and the balloon catheter.

11. The device according to claim 10, wherein:

the at least one opening includes a plurality of spaced apart openings in the sidewall;

the at least one wire includes a plurality of wires each having a first end and a second end; and

the first ends of the wires are fixed relative to each other.

12. The device according to claim 11, wherein when the longitudinal housing is longitudinally moved with respect to the wires, the second ends of the wires extend through the corresponding openings into the deployed position.

13. The device according to claim 11, further comprising a shaft disposed inside the longitudinal housing and attached to the first ends of the wires.

14. The device according to claim 13 further comprising a handle attached to a proximal end of the shaft, wherein when the longitudinal housing moves longitudinally relative to the handle, the wires extend out from the longitudinal housing into the deployed position.

15. The device according to claim 13, wherein when the longitudinal housing is proximally moved with respect to the shaft, the wires are retracted through the corresponding openings into the undeployed position.

16. The device according to claim 10, further comprising a guide disposed within the longitudinal housing and having at least one guide channel in communication with the opening, the guide channel guiding the wire when the wire is being extended out of the opening.

17. The device according to claim 10, wherein each wire includes a cutting edge that points toward a body lumen wall when extended and an opposite surface designed to contact the balloon.

18. The device according to claim 17, wherein the ratio of the width to height of the wire is greater than or equal to 1.

19. A lesion treating device for use with a balloon catheter, comprising:

a longitudinal housing sized to be inserted into a lumen of a balloon catheter, the longitudinal housing having at least one opening in a sidewall;

a shaft disposed inside the longitudinal housing; and

at least one wire having a first end attached to the shaft and being disposed within the longitudinal housing in an undeployed position;

wherein when the longitudinal housing is moved relative to the shaft, a second end of the at least one wire extends out from the opening into a deployed position to be disposed between an inner wall of a body lumen and a balloon of the balloon catheter.

20. The device according to claim 19, wherein the first end of the at least one wire is positioned distally of the second end.

21. A method of treating a lesion comprising:

inserting, through a lumen of an intraluminal device having an expandable member, a longitudinal housing having a wire in an undeployed position; and

deploying the wire such that the wire extends outside of the longitudinal housing to be positioned between an inner wall of a body lumen and the expandable member of the intraluminal device.

22. The method according to claim 21, further comprising positioning the expandable member of the intraluminal device under the deployed wire.

23. The method according to claim 22, further comprising expanding the positioned expandable member.

24. The method according to claim 21, wherein the step of deploying includes longitudinally moving the longitudinal housing with respect to the wire such that one end of the wire extends out through an opening in a side wall of the longitudinal housing.

25. The method according to claim 24, further comprising proximally and longitudinally moving the longitudinal housing with respect to the deployed wire to retract the deployed wire through the opening in the side wall.

26. A method of treating a lesion comprising:

inserting, through a lumen of a balloon catheter, a longitudinal housing having a wire disposed within the longitudinal housing in an undeployed position; and

deploying the wire such that the wire extends outside of the longitudinal housing to be disposed between an inner wall of a body lumen and a balloon of the balloon catheter.

27. The method according to claim 26, further comprising positioning the balloon of the balloon catheter under the deployed wire.

28. The method according to claim 27, further comprising inflating the positioned balloon.

29. The method according to claim 26, wherein the step of deploying includes longitudinally moving the longitudinal housing with respect to the wire such that one end of the wire extends out through an opening in a side wall of the longitudinal housing.

30. The method according to claim 29, further comprising proximally and longitudinally moving the longitudinal housing with respect to the deployed wire to retract the deployed wire through the opening in the side wall.

31. A method of treating a lesion comprising:

inserting, through a lumen of a balloon catheter, a longitudinal housing having at least one opening in a sidewall and at least one wire disposed within the longitudinal housing;

moving the longitudinal housing relative to the at least one wire to extend a first end of the wire out of the longitudinal housing through the at least one opening; and

positioning a balloon of the balloon catheter under the extended wire.

32. The method according to claim 31, prior to the step of moving the longitudinal housing, further comprising moving the balloon catheter away from a lesion of the body lumen.

33. The method according to claim 32, after the step of positioning a balloon, further comprising inflating the balloon.

34. A method of treatment of a lesion in a body lumen, comprising:

providing a longitudinal housing having wires deployable between a retracted state within the longitudinal housing and a protracted state extending outward from the longitudinal housing;

positioning the longitudinal housing with the wires in the retracted state so that the wires are adjacent to a lesion in a body lumen;

protracting the wires into their protracted state;

when the wires are in their protracted state, moving an inflatable balloon in a deflated state between the wires and the longitudinal housing;

inflating the balloon to force the wires against the adjacent lesion; and

retracting the wires into their retracted state.

35. The method according to claim 34, further comprising deflating the balloon prior to the step of retracting the wires.