Balloon expandable stent with a self-expanding portion

• US 6,740,113 B2
• Filed: 05/21/2002
• Issued: 05/25/2004
• Est. Priority Date: 05/29/1998
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Vrba, Anthony C.
• Primary Examiner(s): Willse, David H.
• Assistant Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US10/153,417
• Publication Number:
  US 20020133218A1
• Time in Patent Office: 735 Days
• Field of Search: 623/1-5-, 623/1.3, 623/1.12, 606/108, 606/198, 606/194
• US Class Current: 623/1.12
• 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 2002/821 Ostial stents
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A stent consisting of at least two parts in juxtaposition, one part being of self-expandable characteristics while the other part is balloon expandable.

Claims

1. A stent delivery assembly comprising a catheter, a balloon located at the distal end of the catheter, a stent disposed about the balloon, wherein at least one end of the stent extends beyond the length of the balloon, the stent having at least one end portion that is self-expanding.

2. The stent delivery assembly of claim 1 wherein the stent has a middle portion that is balloon expandable.

3. The stent delivery assembly of claim 1 wherein the self-expanding portion of the stent is covered by a sheath.

4. The stent delivery assembly of claim 1 comprising a self-expanding end portion made of nitinol.

5. A stent delivery assembly comprising:

a catheter with a balloon located at the distal end thereof;

a stent disposed about the balloon;

wherein one of the ends of the stent is covered by a sheath and a middle portion of the stent is not covered by a sheath, the stent having end portions that are self-expanding.

6. The stent delivery assembly of claim 5 wherein the middle portion of the stent is balloon expandable.

7. The stent delivery assembly of claim 5 wherein nitinol is used to form a self-expanding end portion.

8. The stent delivery assembly of claim 5 wherein the stent is longer than the balloon.

9. A stent delivery assembly comprising:

a catheter with a balloon located at the distal end thereof;

a stent disposed about the balloon, said stent having at least one end portion that is self-expanding;

a sheath extending only over the self-expanding portion of the stent.

10. The stent delivery assembly of claim 9 wherein at least one portion of the stent is balloon expandable.

11. The stent delivery assembly of claim 10 wherein the balloon expandable portion of the stent is a middle portion of the stent.

12. The stent delivery assembly of claim 10 wherein the at least one self-expandable portion has a larger diameter than the rest of the stent.

13. The stent delivery assembly of claim 9 wherein the stent has a plurality of end portions that are self-expanding.

14. The stent delivery assembly of claim 9 wherein nitinol is used to form the self-expanding portion.

15. The stent delivery assembly of claim 9 wherein the stent is longer than the balloon.