Stent delivery device using stent cups and mounting collars

• US 6,395,008 B1
• Filed: 08/23/1996
• Issued: 05/28/2002
• Est. Priority Date: 08/23/1996
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Dusbabek, Andrew J., Ellis, Louis G.
• Primary Examiner(s): YU, JUSTINE ROMANG
• Application Number:
  US08/701,979
• Time in Patent Office: 2,104 Days
• Field of Search: 606/108,194,195,198
• US Class Current: 606/108
• 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 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/9586 the means being inside the balloon
• CPC Class Codes: A61M 2025/1093 having particular tip characteristics
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters

Abstract

An assembly and a method to deliver and deploy and inflation expandable stent is described. The assembly has a catheter with an annular collar is coaxially located on the catheter distal end. An expandable balloon, in a contracted state, is coaxially mounted over the collar at the catheter distal end. A stent, in a reduced configuration, is coaxially mounted on the balloon and conformed to the catheter and collar. At least one cup is coaxially mounted on the catheter distal end. The cup and collar are cooperate to retain the end portion of the reduced stent on the catheter. The balloon is inflated to expand the stent and release the stent from the cup or cups. The cup can be axially spaced from the collar. The cup can be fixed to the catheter or can be freely sliding on the catheter. The cup can overlie at least a portion of the collar. The collar can be shaped as a single member with the catheter.

Claims

1. An assembly for delivery and deployment of an inflation expandable stent, comprising:

a catheter having proximal and distal end portions;

an annular collar coaxially located at the catheter distal end portion;

an expandable balloon coaxially mounted over the collar at the catheter distal end portion, the balloon being expandable from a contracted to an expanded state;

a stent having proximal and distal end portions coaxially mounted on the balloon, the stent being expandable from a reduced to an enlarged condition, the reduced condition conforming the stent to the balloon and catheter, the stent having at least a proximal or distal end portion overlying the balloon, the collar abutting the stent as a stop;

a cup coaxially mounted on the catheter distal end portion, the cup having a first end portion restraining the stent proximal end portion and being rigid; and

the cup and collar cooperatively constructed and arranged to retain the stent distal and proximal end portions on the catheter in the stent reduced condition when the balloon is in the contracted state, the balloon and catheter cooperatively constructed and arranged to cause expansion of the balloon from the contracted to the expanded state and to release the stent proximal end portion from the cup end portion.

2. The assembly according to claim 1, wherein the cup is axially spaced from the collar.

3. The assembly according to claim 1, wherein the cup has a second end portion fixed to the catheter.

4. The assembly according to claim 3, wherein the second end portion is fixed with adhesive.

5. The assembly according to claim 1, wherein the cup first end portion overlies the stent end portion.

6. The assembly according to claim 1, wherein the collar is formed as a single member with the catheter.

7. The assembly according to claim 1, wherein the stent proximal or distal end portion is a distal end portion and wherein the cup and collar cooperate to retain the stent at the stent distal end portion.

8. The assembly according to claim 1, wherein the collar is axially positioned exterior to the stent at a stent distal end portion opposite the stent proximal end portion retained by the cup.

9. The assembly according to claim 8 wherein the collar is formed as a single member with the catheter.

10. The assembly according to claim 1, wherein the collar is a mounting ring axially positioned between stent end portions.

11. The assembly according to claim 10, wherein the mounting ring is formed as a single member with the catheter.

12. The assembly according to claim 10, wherein at least a portion of the mounting ring is contained by the cup.

13. The assembly according to claim 1, wherein the collar is a cylinder under the stent.

14. The assembly according to claim 13, wherein at least a portion of the cylinder is contained by the cup.

15. The assembly according to claim 13, wherein the cylinder is formed as a single member with the catheter.

16. The assembly according to claim 1, wherein a second collar is a mounting ring axially positioned between stent end portions.

17. The assembly according to claim 1, wherein a second collar is axially positioned immediately exterior to the stent at a stent end portion opposite the stent end portion retained by the cup.

18. The assembly according to claim 1, wherein the cup and the collar are each cylindrical.

19. The assembly according to claim 1, wherein the cup has a second end portion with axially running regions of weakness.

20. The assembly according to claim 1, and further including a second cup coaxially mounted on the catheter at the catheter distal end, the second cup having a first end portion overlying a stent second end portion;

the cups and the collar cooperatively constructed and arranged to retain the respective stent end portions on the catheter in the stent reduced condition when the balloon is in the contracted state, the balloon and catheter cooperatively constructed and arranged to cause expansion of the balloon from the contracted to the expanded state to cause release of the stent end portions from the cup end portions.

21. The assembly according to claim 20, wherein the collar is formed as a single member with the catheter.

22. The assembly according to claim 20, wherein the collar is axially positioned immediately exterior to the stent at a stent end portion opposite the stent end portion retained by the cup.

23. The assembly according to claim 22, wherein the collar is shaped as a single member with the catheter.

24. The assembly according to claim 20, wherein the collar is a mounting ring axially positioned between stent end portions.

25. The assembly according to claim 24, wherein the mounting ring is shaped as a single member with the catheter.

26. The assembly according to claim 24, wherein at least a portion of the mounting ring is contained by at least one of the cups.

27. The assembly according to claim 20, wherein the collar is a cylinder coextensive with the length of the stent.

28. The assembly according to claim 27, wherein the cylinder is formed as a single member with the catheter.

29. The assembly according to claim 27, wherein at least a portion of the cylinder is contained by at least one of the cups.

30. The assembly according to claim 29, wherein each cup contains at least a portion of the cylinder.

31. The assembly according to claim 20, wherein a second collar is a mounting ring axially positioned between stent end portions.

32. The assembly according to claim 20, wherein a second collar is axially positioned immediately exterior to the stent at a stent end portion opposite the stent end portion retained by at least one of the cups.

33. The assembly according to claim 20, and further comprising fixing means for holding the collar at a specific location on the catheter.

34. The assembly according to claim 33, wherein the fixing means is adhesive.

35. An assembly for delivery and deployment of an inflation expandable stent, comprising:

a catheter having proximal and distal ends;

a mounting body carried by the catheter at the distal end portion;

an expandable balloon coaxially mounted over the catheter distal end and the mounting body, the balloon being expandable from a contracted to an expanded state;

a stent coaxially mounted on the balloon, the stent being expandable from a reduced to an enlarged condition, the reduced condition conforming the stent to the contracted balloon and catheter, the stent having an end portion overlying the balloon;

first and second cups coaxially mounted on the catheter distal end, each cup having a first end portion overlying a stent end portion, respectively, wherein at least one of the cups is rigid; and

the cups constructed and arranged to retain the stent therebetween on the catheter in the stent reduced condition when the balloon is in the contracted state, the balloon and catheter cooperatively constructed and arranged to cause expansion of the balloon from the contracted to the expanded state to cause expansion of the stent, including the stent end portions, from the reduced to the enlarged condition, and thereby release the stent from abutting the cup end portions.