Stent delivery catheter

• US 20050149160A1
• Filed: 12/23/2003
• Published: 07/07/2005
• Est. Priority Date: 12/23/2003
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: McFerran, Sean
• Granted Patent: US 7,887,574 B2
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod

Abstract

A self-expanding stent delivery assembly includes an elongate member with a proximal region and a distal region. The distal region has an outer tubular member. A self-expanding stent is disposed within the outer tubular member. Circumferential movement of at least a portion of the proximal region causes relative axial movement between the self-expanding stent and the outer tubular member, deploying the stent. Methods of deploying a self-expanding stent are also described.

Claims

1. A self-expanding stent delivery assembly comprising:

an elongate member having a proximal region and a distal region, the distal region having an outer tubular member;

a self-expanding stent disposed within the outer tubular member;

wherein circumferential movement of at least a portion of the proximal region causes relative axial movement between the self-expanding stent and the outer tubular member, deploying the stent.

2. The assembly according to claim 1, further comprising an inner elongate member disposed within the elongate member.

3. The assembly according to claim 2, wherein circumferential movement of at least a portion of the inner elongate member causes relative axial movement between the self-expanding stent and the outer tubular member, deploying the stent.

4. The assembly according to claim 2, wherein circumferential movement of at least a portion of the elongate member proximal region causes relative axial movement between the self-expanding stent and the outer tubular member, deploying the stent.

5. The assembly according to claim 3, wherein circumferential movement of at least a portion of the inner elongate member causes axial movement of the self-expanding stent in a distal direction, deploying the stent.

6. The assembly according to claim 3, wherein circumferential movement of at least a portion of the inner elongate member causes axial movement of the outer tubular member in a proximal direction, deploying the stent.

7. The assembly according to claim 4, wherein circumferential movement of at least a portion of the elongate member proximal region causes axial movement of the self-expanding stent in a distal direction, deploying the stent.

8. The assembly according to claim 4, wherein circumferential movement of at least a portion of the elongate member proximal region causes axial movement of the outer tubular member in a proximal direction, deploying the stent.

9. The assembly according to claim 2, further comprising a helical element disposed on at least a portion of the inner elongate member or at least a portion of the outer tubular member, and a helical element engagement member on at least a portion of the inner elongate member or at least a portion of the outer tubular member.

10. The assembly according to claim 1, further comprising a layer of lubricious material disposed between the outer tubular member and the self-expanding stent.

11. The assembly according to claim 2, wherein the inner elongate member is a hypotube having a helical element on at least a portion of the hypotube and the hypotube is adjacent to the self-expanding stent.

12. The assemble according to claim 11, wherein the inner elongate member further comprises a torque plunger disposed within at least a portion of the hypotube, the torque plunger having a helical element engagement member on the torque plunger arranged and configured such that circumferential movement of the torque plunger causes axial movement of the hypotube, deploying the self expanding stent.

13. A method of deploying a self-expanding stent comprising the steps of:

placing a stent delivery device at a target site, the stent delivery device comprising;

an elongate member having a proximal region and a distal region, the distal region having an outer tubular member; and

a self-expanding stent disposed within the outer tubular member;

deploying the stent by rotating at least a portion of the proximal region, causing relative axial movement between the self-expanding stent and the outer tubular member; and

removing the stent delivery device from the target site.

14. The method according to claim 13, wherein the placing step comprises placing a stent delivery device at a target site, the stent delivery device further comprising an inner elongate member disposed within the elongate member.

15. The method according to claim 14, wherein the deploying step comprises deploying the stent by rotating at least a portion of the inner elongate member, causing relative axial movement between the self-expanding stent and the outer tubular member.

16. The method according to claim 14, wherein the deploying step comprises deploying the stent by rotating at least a portion of the elongate member proximal region, causing relative axial movement between the self-expanding stent and the outer tubular member.

17. The method according to claim 15, wherein the deploying step comprises deploying the stent by rotating at least a portion of the inner elongate member, causing axial movement of the self-expanding stent in a distal direction.

18. The method according to claim 15, wherein the deploying step comprises deploying the stent by rotating at least a portion of the inner elongate member, causing axial movement of the outer tubular member in a proximal direction.

19. The method according to claim 16, wherein the deploying step comprises deploying the stent by rotating at least a portion of the elongate member proximal region, causing axial movement of the self-expanding stent in a distal direction.

20. The method according to claim 16, wherein the deploying step comprises deploying the stent by rotating at least a portion of the elongate member proximal region, causing axial movement of the outer tubular member in a proximal direction.

21. The method according to claim 14, wherein the placing step comprises placing a stent delivery device at a target site, the stent delivery device further comprising a helical element disposed on at least a portion of the inner elongate member or at least a portion of the outer tubular member, and a helical element engagement element disposed on at least a portion of the inner elongate member or at least a portion of the outer tubular member.