Apparatus for Loading and Delivering a Stent

• US 20150081005A1
• Filed: 08/29/2014
• Published: 03/19/2015
• Est. Priority Date: 05/19/2006
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Headley, F. Anthony Jr., Damarati, John, Leanna, Gary J., Wood, Mark D.
• Granted Patent: US 9,943,429 B2
• Time in Patent Office: Days
• 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 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2/9525 using a funnel
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/826 more than one stent being applied sequentially
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve

Abstract

A stent loading and deployment device includes an outer elongate tubular member having opposed proximal and distal ends and an inner elongate tubular member having opposed proximal and distal ends and slidably disposed within the outer tubular member. When the distal ends of the outer tubular member and the inner tubular member are axially aligned, a stent deployment region is defined there in between. The device further includes a stent loading member having opposed proximal and distal ends and slidably disposed between the outer tubular member and the inner tubular member. The distal end of the stent loading member is slidable to a distal position past the distal end of the outer tubular member for receiving a stent and is further slidable toward the proximal end of the outer tubular member to a location past the stent deployment region for disengagement of a stent from the stent loading member.

Claims

1. A stent capturing element radially distensible between a collapsed configuration and an open configuration, wherein when the stent capturing element is in the open configuration the stent capturing element comprises a truncated conically shaped portion and a rim portion defining an open end of the stent capturing element, the truncated conical shape having a maximum diameter greater than a diameter of the rim portion defining the open end.

2. The stent capturing element of claim 1, the stent capturing element having a circumference and a wall extending about an entirety of the circumference.

3. The stent capturing element of claim 1, wherein the stent capturing element is a mesh, a weave, or a braid.

4. The stent capturing element of claim 1, wherein the stent capturing element comprises a filament, the filament selected from the group consisting of polymeric filaments and metallic filaments.

5. The stent capturing element of claim 4, wherein the filament is contained within a polymeric film.

6. The stent capturing element of claim 5, wherein the polymeric film comprises a polyamide, polytetrafluoroethylene, or polyethylene terephthalate.

7. The stent capturing element of claim 1, wherein a proximal end of the stent capturing element is fixedly engaged to an elongated tubular device.

8. The stent capturing element of claim 7, wherein the elongated tubular device is a catheter shaft.

9. An elongate tubular stent basket comprising:

a proximal basket end with a first diameter;

a proximal basket region with a diameter gradually increasing from the first diameter to a second diameter;

a distal basket region with a substantially uniform third diameter equal to the second diameter;

a distal basket end with a fourth diameter less than the third diameter and greater than the first diameter.

10. The stent basket of claim 9, wherein the stent basket comprises an interwoven filament.

11. The stent basket of claim 9, wherein the proximal basket end is secured to a distal end of a hollow flexible tube.

12. The stent basket of claim 9, wherein the stent basket further comprises a tapered portion connecting the distal basket region and a distal basket end region, the distal basket end region including the distal basket end.

13. The stent basket of claim 9, wherein the proximal basket region is a truncated cone.

14. A catheter shaft with a stent basket, the stent basket comprising:

a proximal basket attachment region attached to a distal end of the catheter shaft;

a proximal basket region having a truncated conical shape with a minimum diameter at a proximal end and a maximum diameter; and

a distal basket region comprising;

a proximal end with a diameter equal to the maximum diameter of the proximal basket region; and

a distal end with a diameter less than the maximum diameter, the distal end defining an open distal end of the stent basket.

15. The catheter shaft of claim 14, wherein the stent basket comprises an interwoven filament, the filament being selected from the group consisting of polymeric filaments and metallic filaments.

16. The catheter shaft of claim 14, the stent basket having a circumference and a wall extending about an entirety of the circumference.

17. The catheter shaft of claim 15, wherein the filament is contained within a polymeric film.

18. The catheter shaft of claim 17, wherein the polymeric film comprises a polyamide;

polytetrafluoroethylene;

or polyethylene terephthalate.

19. The catheter shaft of claim 14, wherein a handle is attached to a proximal end region of the catheter shaft.

20. The catheter shaft of claim 14, wherein the catheter shaft is positioned inside a lumen of a second catheter shaft, and the stent basket is constructed and arranged to be slidably contained within the lumen of the second catheter shaft.