Catheter for stent delivery having expanded inner member

• US 20060253185A1
• Filed: 05/09/2005
• Published: 11/09/2006
• Est. Priority Date: 05/09/2005
• Status: Abandoned Application

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Beasley, Rudy
• Application Number:
  US11/124,965
• Publication Number:
  US 20060253185A1
• 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 2002/9586 the means being inside the balloon

Abstract

An inner member for use within a stent delivery system is provided, wherein the stent delivery system has a stent and a balloon disposed within the stent, the balloon configured to be mounted about the inner member in a collapsed state. The inner member comprises a proximal section, a distal section, and an intermediate section. The proximal and distal sections each have a first outer diameter. The proximal and distal sections have a first and a second lumen therethrough, respectively. The intermediate section having a third lumen therethrough in communication with the first and second lumens and has a second outer diameter larger than the first outer diameter for exerting a retaining force on the stent.

Claims

1. An inner member for use within a stent delivery system, wherein the stent delivery system has a stent and a balloon disposed within the stent, the balloon configured to be mounted about the inner member in a collapsed state, the inner member comprising:

a proximal and a distal section, each having a first outer diameter, the proximal and distal sections having a first and a second lumen therethrough, respectively; and

an intermediate section having a third lumen therethrough in communication with the first and second lumens and having a second outer diameter larger than the first outer diameter for exerting a retaining force on the stent.

2. The inner member of claim 1, wherein the balloon in the collapsed state and the intermediate section each have a length and the balloon length and the intermediate section length are substantially equal.

3. The inner member of claim 1, wherein the proximal and distal sections each have a first inner diameter and the intermediate section has a second inner diameter and the first inner diameter is substantially equal to the second inner diameter.

4. The inner member of claim 1, wherein the proximal and distal sections each have a first inner diameter and the intermediate section has a second inner diameter and the first inner diameter is less than the second inner diameter.

5. The inner member of claim 1, wherein the intermediate section is bondedly coupled to the proximal and distal sections.

6. The inner member of claim 1, wherein the intermediate section is adhesively coupled to said proximal and distal sections.

7. The inner member of claim 1, wherein proximal and distal sections comprise a flexible material.

8. The inner member of claim 1, wherein at least a portion of proximal and distal sections and the intermediate section are integrally formed from a single piece of material.

9. The inner member of claim 8, wherein the intermediate section comprises material capable of being formed into a desired shape and size and heat treated to maintain the desired shape and size.

10. The inner member of claim 1, wherein the second outer diameter is uniform along the length of the intermediate section.

11. The inner member of claim 1, wherein the second outer diameter varies along the length of the intermediate section.

12. The inner member of claim 1, wherein the intermediate section exerts a substantially normal force.

13. An inner member for use within a stent delivery system, wherein the stent delivery system has a stent and a balloon disposed within the stent, the ballon configured to be mounted about the inner member in a collapsed state, the inner member comprising:

a proximal and a distal section, each having a first outer diameter and a first inner diameter, the proximal and distal sections having a first and a second lumen therethrough, respectively; and

an intermediate section having a third lumen therethrough in communication with and bondedly coupled to the first and second lumens, the intermediate section having a second outer diameter larger than the first outer diameter for exerting a retaining force on the stent and a second inner diameter larger than the first inner diameter,

wherein proximal and distal sections comprise a flexible material and the intermediate section comprises material capable of being formed into a desired shape and size and heat treated to maintain said desired shape and size.

14. The system of claim 13, wherein the second outer diameter is uniform along the length of the intermediate section.

15. The system of claim 13, wherein the second outer diameter varies along the length of the intermediate section.

16. The inner member of claim 13, wherein the force exerted by the intermediate section is a substantially normal force.

17. An inner member for use within a stent delivery system, wherein the stent delivery system has a stent and a balloon disposed within the stent, the balloon configured to be mounted about the inner member in a collapsed state and having a length in the collapsed state, the inner member comprising:

a proximal and a distal section, each having a first outer diameter and a first inner diameter, the proximal and distal sections having a first and a second lumen therethrough, respectively; and

an intermediate section having a third lumen therethrough in communication with the first and second lumens, a second outer diameter larger than the first outer diameter for exerting a retaining force on the stent, a second inner diameter that is substantially equal to the first inner diameter, and a length that is substantially equal to the length of the balloon in the collapsed state,

wherein the proximal and distal sections comprise a flexible material and the intermediate section comprises material capable of being formed into a desired shape and size and heat treated to maintain said desired shape and size.

18. The inner member of claim 17, wherein the intermediate section is bondedly coupled to the proximal and distal sections.

19. The inner member of claim 17, wherein the intermediate section is adhesively coupled to said proximal and distal sections.

20. The inner member of claim 17, wherein at least a portion of proximal and distal sections and the intermediate section are integrally formed from a single piece of material.

21. The inner member of claim 17, wherein the second outer diameter is uniform along the length of the intermediate section.

22. The inner member of claim 17, wherein the second outer diameter varies along said length of the intermediate section.

23. The inner member of claim 17, wherein the force exerted by the intermediate section is a substantially normal force.