Stent security balloon/balloon catheter

• US 20030114915A1
• Filed: 01/31/2003
• Published: 06/19/2003
• Est. Priority Date: 03/31/1999
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Estes, Robert, Mareiro, Wayne, Barry, Ralph J. Jr.
• Granted Patent: US 7,056,323 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve
• CPC Class Codes: A61M 2025/1086 having a special balloon surface topography, e.g. pores, protuberances, spikes or grooves
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence

Abstract

A medical balloon is constructed with protrusions thereon to prevent unwanted movement of an expandable, implantable medical device such as a stent during delivery and deployment. At least some of the protrusions are underlying the expandable, implantable medical device to grip the expandable, implantable medical device.

Claims

1. A medical balloon with an expandable, implantable medical device mounted thereon, the surface of the medical balloon having a plurality of protrusions thereon, at least some of the protrusions at least partially underlying the expandable, implantable medical device to grip the expandable, implantable medical device.

2. The medical balloon of claim 1 wherein the protrusions extend outward from the balloon.

3. The medical balloon of claim 1 wherein the expandable, implantable medical device is a stent crimped to the medical balloon.

4. The medical balloon of claim 3 wherein the portion of the stent griped by the protrusions is at least partially conformed to the shape of the protrusion.

5. The medical balloon of claim 4 wherein at least some of the protrusions extend outward.

6. The medical balloon of claim 4 wherein at least some of the protrusions extend inward.

7. The medical balloon of claim 6 wherein the inwardly extending protrusions extend outward after the balloon has been inflated.

8. The medical balloon of claim 1 made of a compliant balloon material.

9. The medical balloon of claim 1 made of a non-compliant balloon material.

10. The medical balloon of claim 1 wherein the protrusions on the balloon are selected from the group consisting of substantially cylindrical, substantially frustoconical, substantially conical, substantially pyramidal and substantially polygonal protrusions.

11. The medical balloon of claim 1 comprising a proximal cone portion, a distal cone portion and a body portion disposed between the proximal and distal cone portions, wherein the protrusions are regularly spaced about the body portion of the balloon.

12. The medical balloon of claim 1 wherein portions of the support device lie atop some of the protrusions.

13. The medical balloon of claim 1 wherein the support device is a stent.

14. The medical balloon of claim 13 wherein at least some of the protrusions which underlie the stent extend part of the way about the sides of the stent to grip the expandable, implantable medical device from the side.

15. The medical balloon of claim 14 wherein the protrusions extend about the stent to from about 30% to about 50% of the thickness of the stent.

16. The medical balloon of claim 1 wherein the expandable medical device is a stent formed of a plurality of interconnected struts having openings therebetween and the protrusions are irregularly distributed about the balloon relative to the openings in the stent.

17. The medical balloon of claim 1 wherein the expandable medical device is a stent formed of a plurality of interconnected struts having openings therebetween and some of the protrusions engage the stent and some of the protrusions do not engage the stent.

18. The medical balloon of claim 1 wherein the expandable medical device is a stent formed of a plurality of interconnected struts having openings therebetween and some of the protrusions extend between adjacent openings in the stent.

19. A medical device delivery apparatus comprising a tube with the balloon of claim 1 mounted thereon and an inflation lumen in fluid communication with the balloon.

20. A method of delivering an expandable, implantable medical device to a bodily location comprising the steps of:

i) providing a medical device delivery apparatus comprising

a balloon mounted on a tube, the balloon having protrusions thereon,

an inflation lumen capable of fluid communication with the balloon,

an expandable, implantable medical device disposed about the balloon, at least some of the protrusions on the balloon underlying the expandable, implantable medical device to grip the expandable, implantable medical device;

ii) inserting at least a portion of the apparatus including the balloon and medical device into a bodily vessel;

iii) advancing the medical device and balloon to a desired bodily location;

iv) inflating the balloon to expand the medical device;

v) at least partially deflating the balloon such that the protrusion no longer extends into the opening in the medical device;

vi) withdrawing the apparatus from the body.

21. The method of claim 20 wherein the medical device is a stent.

22. The method of claim 20 wherein the balloon includes inwardly directed protrusions which extends outward upon inflating the balloon.