Apparatus and method for delivering a self-expanding stent on a guide wire

• US 6,280,465 B1
• Filed: 12/30/1999
• Issued: 08/28/2001
• Est. Priority Date: 12/30/1999
• Status: Active Grant

• Current Assignee: Advanced Cardiovascular Systems Incorporated
• Original Assignee: Advanced Cardiovascular Systems Incorporated
• Inventors: Cryer, Brett W.
• Primary Examiner(s): WEHNER, CARY ELLEN
• Application Number:
  US09/475,601
• Time in Patent Office: 607 Days
• Field of Search: 606/108, 606/198, 606/200, 606/190, 606/194, 623/1.23, 623/1.18, 623/1, 623/1.2, 623/1.11
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of 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: A61F 2002/9511 the retaining means being filaments or wires

Abstract

An assembly for delivering a self-expanding stent to an intraluminal location comprising a guide wire, a retainer to secure the stent to the guide wire in a compressed configuration, and a release member to release the stent from the retainer and allow the stent to assume an expanded configuration. The stent may be compressed by axial elongation, radial compression, or linear elongation into a generally tube-like configuration. The release member may operate the retainer to release the stent or urge the stent away from contact with the retainer.

Claims

1. A stent delivery assembly, comprising:

a guide wire having a distal portion;

a stent disposed on the distal portion of the guide wire and self-expandable from a compressed configuration to an expanded configuration;

a retainer affixed to the guide wire distal portion, the retainer configured to releasably retain the stent on the guide wire in the compressed configuration; and

a release member operatively connected to the retainer to release the stent therefrom so that the stent assumes the expanded configuration.

2. The assembly of claim 1, wherein:

the release member extends along the guide wire to near a proximal end thereof.

3. The assembly of claim 2, wherein:

the retainer comprises a distal member to engage a distal end of the stent and a proximal member to releasably engage a proximal end of the stent; and

the release member is operatively connected to the retainer proximal end.

4. The assembly of claim 3, wherein:

the retainer distal member is formed with barbs projecting radially outward from the guide wire.

5. The assembly of claim 4, further comprising:

a shield member disposed on the guide wire distally of the retainer distal member and projecting radially outward from the guide wire for a distance equal to or greater than the barbs.

6. The assembly of claim 4, wherein:

the retainer proximal member is disposed within the stent and includes a plurality of apertures; and

the release member is formed with a distal portion removably received through the apertures to releasably secure the stent distal end to the retainer proximal member.

7. The assembly of claim 2, wherein:

the stent is formed with a distal end having an aperture and a proximal end having an aperture;

the retainer comprises a distal member disposed distally of the stent and a proximal member disposed proximally of the stent; and

the release member is formed with a distal portion removably received through the retainer members and the stent apertures to releasably secure the stent distal end and stent proximal end to the guide wire distal portion.

8. The assembly of claim 7, wherein:

the retainer members are comprised of tubular structures having lumens for slidably receiving the release member distal portion therethrough.

9. The assembly of claim 8, wherein:

the stent is formed with a generally helical structure; and

the release member is slidably received through the stent apertures to retain the ends of the stent in circumferentially fixed relationship to one another and prevent them from rotating to allow the stent to assume the expanded configuration.

10. A stent delivery assembly, comprising:

a stent;

a guide wire having a distal portion and including a retainer affixed thereto, the retainer configured to retain the stent in direct contact with the guide wire.

11. The stent delivery system of claim 10, wherein the stent is formed from a tube with a lumen therethrough.

12. The stent delivery system of claim 10, wherein the stent is self-expandable from a generally linear compressed configuration to an expanded configuration.

13. The stent delivery system of claim 11, wherein the guide wire is slidably received through the stent tube lumen to retain the compressed stent thereon.

14. The stent delivery system of claim 10, further comprising a tubular release member slidably disposed over the guide wire with a distal end configured to engage the stent.

16. The assembly of claim 11, wherein:

the release member is slidably disposed over the guide wire with a distal end configured to urge the compressed stent out of the retainer to assume the expanded configuration.

17. The assembly of claim 11, wherein:

the release member is fixedly attached to the guide wire to prevent proximal motion of the compressed stent.

15. A stent delivery assembly, comprising:

a guide wire having a distal portion;

a stent disposed over the guide wire portion and self-expandable from a compressed configuration to an expanded configuration;

a tubular retainer disposed at least over the distal portion to retain the stent thereon in the compressed configuration; and

a tubular release member slidably disposed over the guide wire with a distal end configured to engage the proximal end of the compressed stent.