Sandwich striped sleeve for stent delivery

• US 6,733,520 B2
• Filed: 04/09/2001
• Issued: 05/11/2004
• Est. Priority Date: 09/22/2000
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Miller, Paul J., Yang, Dachuan
• Primary Examiner(s): Willse, David H.
• Application Number:
  US09/829,295
• Publication Number:
  US 20020038141A1
• Time in Patent Office: 1,128 Days
• Field of Search: 623/1.11, 623/1.12, 623/FOR.100, 606/108
• US Class Current: 623/1.12
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve

Abstract

The present invention is a stent delivery system including a catheter, wherein the catheter includes an inflatable region. An expandable stent is disposed about at least a portion of the inflatable region. A first end of the at least one stent retaining sleeve covers an end of the stent prior to the stent being expanded for delivery. A second end of the at least one sleeve is engaged to at least a portion of the catheter adjacent to the inflatable region. The at least one stent retaining sleeve is constructed and arranged to longitudinally foreshorten from a first predetermined length to a second predetermined length when the stent is expanded for delivery. The second predetermined length being more than 5 percent shorter than the first predetermined length. When the stent is expanded for delivery, the at least one stent retaining sleeve is retracted off of the stent thereby releasing the stent from the catheter.

Claims

1. A stent delivery system comprising:

a catheter including a stent mounting region, the stent mounting region being inflatable from a first inflation state to a second inflation state;

a stent disposed about the stent mounting region of the catheter, the stent having a distal end and a proximal end, the stent further having a first expanded state and a second expanded state, and

at least one stent retaining sleeve, the at least one stent retaining sleeve having a first end and a second end, the first end overlying an end of the stent prior to the stent being placed in the second expanded state, the second end engaged to at least a portion of the catheter adjacent to the stent mounting region, the at least one stent retaining sleeve constructed and arranged to longitudinally foreshorten from a first predetermined length in the first inflation state to a second predetermined length in the second inflation state, the second predetermined length being more than 5 percent shorter than the first predetermined length, further wherein in the second inflation state the stent is in the second expanded state and the first end of the at least one stent retaining sleeve is retracted off of the stent thereby releasing the stent from the catheter, wherein the at least one sleeve is constructed from a combination of a matrix of a matrix material formed into a tube and a plurality of elongate stripes, the elongate stripes being made of a stripe material, each elongate stripe being engaged to the matrix, wherein no elongate stripe is interwoven with any other elongate stripe.

2. The stent delivery system of claim 1 wherein the second predetermined length is at least 10 percent shorter than the first predetermined length.

3. The stent delivery system of claim 1 wherein the second predetermined length is at least 20 percent shorter than the first predetermined length.

4. The stent delivery system of claim 1 wherein the matrix material and the stripe material have different material characteristics.

5. The stent delivery system of claim 1 wherein the at least one elongate stripe is substantially parallel to a longitudinal axis of the at least one sleeve in an unexpanded state.

6. The stent delivery system of claim 5 wherein the at least one elongate stripe has a length substantially equal to that of the matrix.

7. The stent delivery system of claim 1 wherein the at least one elongate stripe is characterized as being oriented in a helical manner relative to the matrix.

8. The stent delivery system of claim 1 wherein the at least one stripe extends back and forth in a repeating manner from the first end of the at least one sleeve to the second end of the at least one sleeve at a predetermined angle relative to a longitudinal axis of the at least one sleeve.

9. The stent delivery system of claim 1 wherein the at least one stripe comprises a first stripe and a second stripe,

the first stripe extending back and forth in a repeating manner from the first end of the at least one sleeve to a middle portion of the at least one sleeve at a predetermined angle relative to a longitudinal axis of the at least one sleeve,

the second stripe extending back and forth in a repeating manner from the second end of the at least one sleeve to the middle portion of the at least one sleeve at a second predetermined angle relative to the longitudinal axis of the at least one sleeve.

10. The stent delivery system of claim 9 wherein the first predetermined angle and the second predetermined angle are the same.

11. The stent delivery system of claim 1 wherein each elongate stripe is constructed of a plurality of fibers of the stripe material woven together to form a braid.

12. The stent delivery system of claim 11 wherein at least one of the plurality of elongate stripes is substantially parallel to a longitudinal axis of the at least one sleeve in an unexpanded state.

13. The stent delivery system of claim 11 wherein at least one of the plurality of elongate stripes is oriented in a helical manner to the matrix.

14. The stent delivery system of claim 11 wherein the plurality of elongate stripes extend back and forth from the first end of the at least one sleeve to the second end of the at least one sleeve, each of the plurality of elongate stripes being disposed at a predetermined angle relative to a longitudinal axis of the at least one sleeve.

15. The stent delivery system of claim 11 wherein each of the plurality of elongate stripes has a predetermined length different from one another.

16. The stent delivery system of claim 11 wherein the plurality of elongate stripes are distributed throughout the matrix in a uniform manner.

17. The stent delivery system of claim 11 wherein each of the plurality of elongate stripes have a uniform orientation relative to a longitudinal axis of the at least one sleeve.

18. The stent delivery system of claim 11 wherein the plurality of elongate stripes are distributed throughout the matrix randomly.

19. The stent delivery system of claim 11 wherein each of the plurality of elongate stripes have a uniform orientation relative to a longitudinal axis of the at least one sleeve.

20. The stent delivery system of claim 11 wherein the plurality of elongate stripes are distributed randomly throughout the matrix.

21. The stent delivery system of claim 11 wherein each of the plurality of elongate stripes have a randomly determined orientation relative to a longitudinal axis of the at least one sleeve.

22. The stent delivery system of claim 1 wherein the at least one elongate stripe is substantially enclosed by the matrix.

23. The stent delivery system of claim 1 wherein the matrix has an outside surface, the at least one elongate stripe being engaged to the outside surface of the matrix.

24. The stent delivery system of claim 1 wherein the matrix has an inside surface, the at least one elongate stripe being engaged to the inside surface of the matrix.

25. The stent delivery system of claim 1 wherein the matrix material further comprises a plurality of matrix layers, each of the plurality of matrix layers being a different material.

26. The stent delivery system of claim 25 wherein the plurality of matrix layers comprise an inner matrix layer and an outer matrix layer.

27. The stent delivery system of claim 26 wherein the at least one elongate stripe is positioned between at least a portion of the inner matrix layer and the outer matrix layer.

28. The stent delivery system of claim 26 wherein the plurality of matrix layers further comprise an intermediate matrix layer positioned between the inner matrix layer and the outer matrix layer, the at least one elongate stripe being substantially enclosed within the intermediate matrix material.

29. The stent delivery system of claim 1 wherein the matrix material is selected from at least one member of the group consisting of:

styrenic block copolymers, polyurethanes, silicone rubber, natural rubber, copolyesters, polyamides, EPDM rubber/polyolefin, nitril rubber/PVC, fluoroelastomers, butyl rubber, epichlorohydrin, and any combinations thereof.

30. The stent delivery system of claim 1 wherein the stripe material is selected from at least one member of the group consisting of:

liquid crystal polymers, polyolefins, polystyrene, polyvinyl chloride, acrylonitrile-butadiene-styrene polymers, polyacrylonitrile, polyacrylate, vinyl acetate polymer, cellulose plastics, polyurethanes, polyethylene terephthalate, polyacetal, polyethers, polycarbonates, polyamides, polyphenylene sulfide, polyarylethersulfones, polyaryletherketones, polytetrafluoroethylene, polyethyleneterephthalate, nylon, metal, carbon, glass and any combinations thereof.