Balloon catheter having a textured member for enhancing balloon or stent retention

• US 20050154440A1
• Filed: 01/13/2004
• Published: 07/14/2005
• Est. Priority Date: 01/13/2004
• Status: Active Grant

• Current Assignee: Advanced Cardiovascular Systems Incorporated (Abbott Laboratories)
• Original Assignee: Advanced Cardiovascular Systems Incorporated (Abbott Laboratories)
• Inventors: Limon, Timothy A.
• Granted Patent: US 7,316,709 B2
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61M 2025/0183 Rapid exchange or monorail catheters
• CPC Class Codes: A61M 2025/1004 Balloons with folds, e.g. folded or multifolded
• CPC Class Codes: A61M 2025/1056 having guide wire lumens outside the main shaft, i.e. the guide wire lumen is within or on the surface of the balloon
• CPC Class Codes: A61M 25/0102 Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod
• CPC Class Codes: A61M 25/104 used for angioplasty

Abstract

This invention is directed to a balloon catheter having at least one advancement wire with a distal end section secured to a distal tip section of the catheter, and with a textured section extending along the outer surface of at least a portion of an inflatable section of the catheter balloon. The textured section of the advancement wire preferably improves the ability of the balloon to remain in position in the patient'"'"'s body lumen during inflation of the balloon to perform a medical procedure such as balloon angioplasty or stent touch-up.

Claims

1. A balloon catheter, comprising:

a) an elongated shaft having a proximal end, a distal end, an inflation lumen, and a tubular member defining a guidewire lumen configured to slidably receive a guidewire therein;

b) a balloon secured to the shaft so that an inflatable interior of the balloon is in fluid communication with the inflation lumen, the balloon having an inflatable section and an outer surface; and

c) at least one advancement wire having a distal end section secured to a distal tip section of the catheter, a proximal end section at a proximal end section of the catheter, and a textured section extending along the outer surface of at least a portion of the inflatable section of the balloon and external to the guidewire lumen.

2. The balloon catheter of claim 1 wherein the advancement wire comprises a core member, and the textured section of the advancement wire is formed by one or more projections which project from an outer surface of the core member at least in part away from the balloon outer surface.

3. The balloon catheter of claim 2 wherein the one or more projections extend in a spiraling pattern longitudinally along the outer surface of the core member.

4. The balloon catheter of claim 3 wherein the one or more projections comprise a wire member wound on the outer surface of the core member.

5. The balloon catheter of claim 2 wherein the one or more projections comprise intermittent spaced apart bands or band-like projections.

6. The balloon catheter of claim 1 wherein the texture section comprises peaks of an undulating surface of the advancement wire.

7. The balloon catheter of claim 1 wherein the guidewire lumen extends at least along the distal tip section of the catheter located distal to the inflatable interior of the balloon.

8. The balloon catheter of claim 7 wherein the guidewire lumen is a distal tip lumen having a proximal end located distal to the distal end of the inflation lumen.

9. The balloon catheter of claim 7 wherein the inflation lumen is defined by an outer tubular member and the tubular member defining the guidewire lumen is an inner tubular member having a proximal section extending in the inflation lumen and a distal section extending through the balloon interior to a distal guidewire port in the distal end of the catheter.

10. The balloon catheter of claim 1 wherein the advancement wire distal end is secured to the tubular member defining the guidewire lumen.

11. The balloon catheter of claim 1 wherein the advancement wire extends external to the entire length of the catheter shaft proximal to the balloon.

12. The balloon catheter of claim 11 wherein the advancement wire is secured to at least a portion of the catheter shaft proximal to the balloon.

13. The balloon catheter of claim 1 wherein the advancement wire extends within and is secured to at least a portion of the catheter shaft proximal to the balloon.

14. The balloon catheter of claim 1 wherein the balloon has a folded noninflated configuration with wrapped wings, and the advancement wire extends outside folds created by the wrapped wings.

15. The balloon catheter of claim 1 wherein the catheter has 2 to 6 advancement wires.

16. The balloon catheter of claim 1 including a stent around an outer surface of the balloon, and wherein the advancement wire textured section has multiple longitudinally spaced apart projections or peaks with a spacing therebetween which is configured to allow a strut of a ring of the stent to fit between adjacent longitudinally spaced apart projections.

17. The balloon catheter of claim 3 wherein the spiraling pattern of the advancement wire projections spirals with a pitch which is configured to allow a strut of a ring of a stent around an outer surface of the balloon to fit between adjacent longitudinally spaced apart projections.

18. A stent delivery balloon catheter, comprising:

a) an elongated shaft having a proximal end, a distal end, an inflation lumen, and a tubular member defining a guidewire lumen configured to slidably receive a guidewire therein;

b) a balloon secured to the shaft so that an inflatable interior of the balloon is in fluid communication with the inflation lumen, the balloon having an inflatable section and an outer surface;

c) at least one advancement wire comprising a core member with a textured section formed by one or more projections or peaks on an outer surface of the core member, the advancement wire having a distal end section secured to a distal tip section of the catheter, and a proximal end section at a proximal end section of the catheter, and the textured section extending along the outer surface of at least a portion of the inflatable section of the balloon and external to the guidewire lumen; and

d) a stent mounted on the balloon, having rings longitudinally spaced apart, so that a strut of at least one of said rings is between adjacent projections or peaks of the advancement wire to thereby mesh the stent with textured section of the advancement wire.

19. The stent delivery catheter of claim 18 wherein the advancement wire comprises a core member and the one or more projections or peaks comprise a wire member wound in a spiraling pattern longitudinally along the outer surface of the core member.

20. The stent delivery catheter of claim 18 wherein the balloon has a folded noninflated configuration with wrapped wings, and the advancement wire extends outside folds created by the wrapped wings.