Stent delivery assembly

• US 6,221,090 B1
• Filed: 09/23/1999
• Issued: 04/24/2001
• Est. Priority Date: 08/13/1997
• Status: Expired due to Term

• Current Assignee: Advanced Cardiovascular Systems Incorporated
• Original Assignee: Advanced Cardiovascular Systems Incorporated
• Inventors: Wilson, W. Stan
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US09/401,704
• Time in Patent Office: 579 Days
• Field of Search: 606/194, 606/108, 606/192, 606/195, 606/198, 604/96, 604/101, 604/102
• US Class Current: 606/194
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/067 modular
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61F 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/001 Figure-8-shaped, e.g. hourglass-shaped
• CPC Class Codes: A61F 2250/0014 having different values of a given property or geometrical feature, e.g. mechanical property or material property, at different locations within the same prosthesis
• CPC Class Codes: A61F 2250/006 modular
• CPC Class Codes: A61M 2025/1045 for treating bifurcations, e.g. balloons in y-configuration, separate balloons or special features of the catheter for treating bifurcations
• 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
• CPC Class Codes: A61M 29/00 : Dilators with or without means for introducing media, e.g. remedies instruments for performing visual medical inspections of cavities or tubes of the body A61B1/00

Abstract

A torquing member is provided in a stent delivery catheter assembly for delivering and implanting a stent at or near a bifurcated vessel. The torquing member, in cooperation with a tracking guide wire and a positioning guide wire, facilitates torquing and rotation of the catheter, and hence the stent mounted thereon, to accurately position and implant the stent at or near the bifurcation.

Claims

1. A stent delivery catheter assembly, comprising:

an elongated catheter having an inflation lumen, a tracking wire lumen, and a positioning wire lumen;

an expandable member positioned at a distal end of the catheter and in fluid communication with the inflation lumen;

a stent mounted on the expandable member; and

a torquing member attached to the tracking wire lumen and positioning wire lumen so that as the catheter is positioned in a body lumen, the torquing member assists in properly orienting the stent in the lumen.

2. The assembly of claim 1, wherein the tracking wire lumen slidably receives a tracking guide wire.

3. The assembly of claim 2, wherein the catheter tracking wire lumen and the catheter positioning wire lumen extend along an outer surface of the expandable member.

4. The assembly of claim 2, wherein the expandable member comprises a proximal end and a distal end and the catheter tracking wire lumen comprises a distal end and a proximal end.

5. The assembly of claim 4, wherein the expandable member distal end is fused to the catheter tracking wire lumen distal end.

6. The assembly of claim 2, wherein the expandable member distal end is attached to the catheter tracking wire lumen distal end.

7. The assembly of claim 1, wherein the positioning guide wire lumen slidably receives a positioning guide wire.

8. The assembly of claim 7, wherein the catheter positioning wire lumen includes a slit to permit the positioning guide wire to bow through the slit during a catheter positioning procedure.

9. The assembly of claim 1, wherein the torquing member comprises a tracking guide wire lumen aligned with the catheter tracking wire lumen, and a positioning guide wire lumen aligned with the catheter positioning wire lumen.

10. The assembly of claim 9, wherein the torquing member further comprises a ramp positioned in the positioning guide wire lumen.

11. The assembly of claim 1, wherein the torquing member is formed from a rigid material.

12. The assembly of claim 11, wherein the torquing member is formed from a plastic material.

13. The assembly of claim 11, wherein the torquing member is formed from metal.

14. The assembly of claim 1, wherein the expandable member is a balloon.

15. The assembly of claim 1, wherein the stent has a proximal end and a distal end, the proximal end of the stent being angulated so that when the stent is mounted on the expandable member the angulated proximal end leaves the torquing member exposed.

16. The assembly of claim 1, wherein the catheter tracking wire lumen extends from a proximal end through the torquing member and through a distal end of the catheter.

17. The assembly of claim 16, wherein the catheter tracking wire lumen is in fluid communication with the torquing member tracking guide wire lumen and the catheter positioning wire lumen is in fluid communication with the torquing member positioning guide wire lumen.

18. The assembly of claim 1, wherein the elongated catheter has a distal section.

19. The assembly of claim 18, wherein the torquing member is positioned at a proximal end of the catheter distal section.

20. The assembly of claim 18, wherein the torquing member is positioned at a distal end of the catheter distal section.

21. The assembly of claim 18, wherein the torquing member is positioned at a point along the catheter distal section so that the torquing member corresponds with an opening in the stent.

22. A stent delivery catheter assembly, comprising:

an elongated catheter having an inflation lumen, a tracking wire lumen, and a positioning wire lumen;

a lumenless expandable member positioned at a distal end of the catheter and in fluid communication with the inflation lumen;

a stent mounted on the expandable member; and

a torquing member attached to the tracking wire lumen and positioning wire lumen so that as the catheter is positioned in a body lumen, the torquing member assists in properly orienting the stent in the lumen.

23. The assembly of claim 22, wherein the tracking wire lumen slidably receives a tracking guide wire.

24. The assembly of claim 22, wherein the positioning guide wire lumen slidably receives a positioning guide wire.

25. The assembly of claim 22, wherein the torquing member comprises a tracking guide wire lumen aligned with the catheter tracking wire lumen, and a positioning guide wire lumen aligned with the catheter positioning wire lumen.

26. The assembly of claim 22, wherein the torquing member is formed from a rigid material.

27. The assembly of claim 22, wherein the expandable member is a balloon.

28. The assembly of claim 22, wherein the stent has a proximal end and a distal end, the proximal end of the stent being angulated so that when the stent is mounted on the expandable member the angulated proximal end leaves the torquing member exposed.

29. The assembly of claim 22, wherein the catheter tracking wire lumen extends from a proximal end through the torquing member and through a distal end of the catheter.

30. The assembly of claim 22, wherein the elongated catheter has a distal section.