Loading basket for a stent delivery system

• US 9,387,104 B2
• Filed: 12/22/2011
• Issued: 07/12/2016
• Est. Priority Date: 12/30/2010
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Nam, Ra, Wood, Mark, Pereira, John, Schneider, Eric M., Bertolino, William C., Suon, Naroun
• Primary Examiner(s): Yabut, Diane
• Assistant Examiner(s): Ton, Martin T
• Application Number:
  US13/335,615
• Publication Number:
  US 20120172962A1
• Time in Patent Office: 1,664 Days
• Field of Search: 623/1.11, 606/200
• US Class Current: 1/1
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod

Abstract

A loading basket is secured at its proximal end to a portion of a delivery device. The stent engages with the interior of the stent basket when loaded onto the delivery device to prevent shifting or movement of the stent during delivery of the stent to a desired location within the bodily lumen. In at least one embodiment, the loading basket has a proximal end, a distal end, and a braided surface. The loading basket comprises a proximal end portion, a proximal transition portion, a body portion, a distal transition portion, a distal end portion, and an angled inward distal end. When loaded onto the delivery device, the outer surface of the stent contacts at least the angled inward distal end of the delivery device and movement of the stent is prevented.

Claims

1. An expandable stent loading basket, the basket having a proximal end, a distal end, and a surface, the basket comprising:

a proximal end portion at the proximal end, the proximal end portion having a diameter;

a proximal body portion connected to the proximal end portion, the proximal body portion having a diameter;

a distal transition portion connected to the proximal body portion;

a distal body portion connected to the distal transition portion, the distal body portion having a diameter;

a gripper region between the distal transition portion and the distal body portion, the gripper region having a diameter smaller than the diameter of the distal body portion and smaller than a diameter of the distal transition portion; and

a distal end portion connected to the distal body portion and forming the distal end of the basket, wherein the distal end portion has a diameter that tapers from a diameter of the distal body portion to a diameter at the distal end of the basket,

wherein the diameter at the distal end is less than the diameter of the distal body portion, the diameter at the distal end is greater than the diameter of the proximal end portion, the diameter of the proximal body portion is greater than the diameter of the distal body portion, and the diameter of the distal body portion is greater than the diameter of the proximal end portion;

wherein the basket is expandable from a radially compressed configuration to a radially expanded configuration.

2. The loading basket of claim 1, wherein at least a portion of the distal body portion has a coating band.

3. The loading basket of claim 1, further comprising a proximal transition portion between the proximal end portion and the proximal body portion.

4. The loading basket of claim 3, further comprising:

a first angle between the distal body portion and the distal end portion;

a second angle between the proximal body portion and the distal transition portion; and

a third angle between the proximal body portion and the proximal transition portion;

wherein the first angle is between about 90° and

about 145°

;

the second angle is between about 125° and

135°

; and

the third angle is between about 125° and

135°

.

5. The loading basket of claim 4, wherein the second angle is equal to the first angle and the third angle is equal to the second angle.

6. The loading basket of claim 1, wherein the distal end portion has a plurality of loops that define the distal end of the loading basket.

7. The loading basket of claim 1, wherein the surface is braided, and a filament is woven through the braided surface around a circumference of the loading basket at the distal end.

8. The loading basket of claim 1, wherein the proximal end portion has an axial length greater than the proximal body portion, the distal transition portion, the distal body portion, and the distal end portion combined.

9. The loading basket of claim 1, wherein the diameter at the distal end of the loading basket is between about 70% and about 80% the diameter of the distal body portion.

10. The loading basket of claim 1, further comprising a suture woven into the distal end portion.

11. The loading basket of claim 10, wherein the distal end region comprises end loops and the suture is woven into the end loops of the distal end portion.

12. The loading basket of claim 1, wherein the loading basket comprises a single monofilament.

13. The loading basket of claim 1, wherein the loading basket forms a part of a stent delivery system comprising:

a first member having a stent loading region;

a second member slidably engaged with the first member, the second member having the loading basket attached thereto.

14. The loading basket of claim 13, the stent delivery system further comprising a stent having a proximal end, a proximal flared section, a body section, a distal end, and a wall defining a lumen, wherein:

the proximal flared section of the stent is deposited into the proximal body portion of the loading basket and the body section extending therefrom,

the lumen of the stent is disposed around the stent loading region of the first member, and

the distal end portion or the gripper region of the loading basket contacts an outer surface of the stent.

15. The loading basket of claim 14, wherein the diameter of the distal end of the loading basket is less than a diameter of the body section of the stent.

16. The loading basket of claim 14, wherein the gripper region has a diameter less than a nominal diameter of the stent.

17. The loading basket of claim 13, wherein the stent delivery system further comprises a third member slidably engaged with the second member, the first member being coaxial with the second member which is coaxial with the third member.

18. An expandable stent loading basket, the basket having a distal end, an outer surface and an inner surface, the basket comprising:

a proximal end portion extending distally from the proximal end, the proximal end portion having a first inner diameter;

a proximal body portion extending distally from the proximal end portion, the proximal body portion having a second inner diameter;

a tapered distal transition portion extending distally from the proximal body portion;

a distal body portion extending distally from the distal transition portion, the distal body portion having a third inner diameter, the third inner diameter being greater than the first inner diameter and less than the second inner diameter, the tapered distal transition portion tapering, in a distal direction, from the second inner diameter down to the third inner diameter; and

a tapered distal end portion extending distally from the distal body portion to the distal end, the distal end having a fourth inner diameter greater than the first inner diameter and less than the third inner diameter, the tapered distal end portion tapering, in a distal direction, from the third inner diameter down to the fourth inner diameter;

wherein the basket is expandable from a radially compressed configuration to a radially expanded configuration.

19. The loading basket of claim 18, wherein the second inner diameter is substantially constant along the proximal body portion from the proximal end portion to the tapered distal transition portion, and the third inner diameter is substantially constant along the distal body portion from the tapered distal transition portion to the tapered distal end portion.

20. The loading basket of claim 18, wherein a length of the proximal body portion is greater than a length of the distal body portion and the tapered distal end portion combined.