Method and apparatus for reducing a stent

• US 8,042,373 B2
• Filed: 02/22/2010
• Issued: 10/25/2011
• Est. Priority Date: 05/25/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Stenzel, Eric B.
• Primary Examiner(s): Tolan; Edward
• Assistant Examiner(s): Yusuf; Mohammad I
• Application Number:
  US12/709,614
• Publication Number:
  US 20100143526A1
• Time in Patent Office: 610 Days
• Field of Search: 724/02, 295/08, 295/17
• US Class Current: 72/402
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2/9524 Iris-type crimpers
• CPC Class Codes: Y10T 29/49913 by constricting outer annulus

Abstract

A medical device crimping system comprises a crimper and a plurality of protective strips. The crimper defines a crimping iris, which has an open state and a closed state. In the open state the cross-sectional area of the crimping iris is greater than in the closed state. The plurality of protective strips extend longitudinally through the crimping iris. Each of the strips is radially offset from one another. The strips protect the stent from direct contact with the crimping blades of the crimper.

Claims

1. A stent crimping system comprising:

a crimping head including a plurality of crimping blades which collectively define an iris for receiving a stent therein, the iris defining an opening extending through the crimping head from a first end of the crimping head to a second end of the crimping head, the plurality of crimping blades being movable between an open position in which the opening of the iris has a first perimeter to a closed position in which the opening of the iris has a second perimeter less than the first perimeter;

a first protective strip extending longitudinally through the opening of the iris of the crimping head from a feeder spool to a receiver spool, the first protective strip having a width measured from a first edge of the first protective strip to a second edge of the first protective strip opposite the first edge of the first protective strip; and

a second protective strip extending longitudinally through the opening of the iris of the crimping head from a feeder spool to a receiver spool, the second protective strip having a width measured from a first edge of the second protective strip to a second edge of the second protective strip opposite the first edge of the second protective strip;

wherein when the crimping blades are in the closed position, a first portion of the first protective strip overlaps a first portion of the second protective strip such that the first portion of the first protective strip is positioned between the stent and the first portion of the second protective strip, and the first portion of the second protective strip is positioned between the first portion of the first protective strip and the perimeter of the opening of the crimping iris.

2. The stent crimping system of claim 1, wherein the first portion of the first protective strip overlapping the first portion of the second protective strip is a curved portion of the first protective strip.

3. The stent crimping system of claim 2, wherein the first portion of the second protective strip overlapping the first portion of the first protective strip is a curved portion of the second protective strip.

4. The stent crimping system of claim 1, wherein when the crimping blades are in the closed position, the width of the first protective strip and the width of the second protective strip are both entirely radially inward of the perimeter of the opening of the iris.

5. The stent crimping system of claim 1, further comprising a third protective strip extending longitudinally through the opening of the iris of the crimping head from a feeder spool to a receiver spool, the third protective strip having a width measured from a first edge of the third protective strip to a second edge of the third protective strip opposite the first edge of the third protective strip.

6. The stent crimping system of claim 5, wherein when the crimping blades are in the closed position, a first portion of the third protective strip overlaps a second portion of the first protective strip and a second portion of the third protective strip overlaps a second portion of the second protective strip.

7. The stent crimping system of claim 6, wherein when the crimping blades are in the closed position, the first portion of the first protective strip is radially inward of the first portion of the second protective strip, the second portion of the second protective strip is radially inward of the second portion of the third protective strip, and the first portion of the third protective strip is radially inward of the second portion of the first protective strip.

8. A stent crimping system comprising:

a crimping head including a plurality of crimping blades which collectively define an iris for receiving a stent therein, the iris defining an opening extending through the crimping head from a first end of the crimping head to a second end of the crimping head, the plurality of crimping blades being movable between an open position in which the opening of the iris has a first perimeter to a closed position in which the opening of the iris has a second perimeter less than the first perimeter;

a first protective strip extending longitudinally through the opening of the iris of the crimping head from a feeder spool to a receiver spool, the first protective strip having a width measured from a first edge of the first protective strip to a second edge of the first protective strip opposite the first edge of the first protective strip; and

a second protective strip extending longitudinally through the opening of the iris of the crimping head from a feeder spool to a receiver spool, the second protective strip having a width measured from a first edge of the second protective strip to a second edge of the second protective strip opposite the first edge of the second protective strip;

wherein when the crimping blades are in the closed position, the width of the first protective strip and the width of the second protective strip are both completely within the perimeter of the opening of the iris of the crimping head.

9. The stent crimping system of claim 8, wherein when the crimping blades are in the closed position, the width of the first protective strip is curved from the first edge of the first protective strip to the second edge of the first protective strip.

10. The stent crimping system of claim 9, wherein when the crimping blades are in the closed position, the width of the second protective strip is curved from the first edge of the second protective strip to the second edge of the second protective strip.

11. The stent crimping system of claim 10, wherein a curved portion of the first protective strip overlaps a curved portion of the second protective strip.

12. The stent crimping system of claim 8, wherein when the crimping blades are in the open position, the width of the first protective strip and the width of the second protective strip are both completely within the perimeter of the opening of the iris of the crimping head.

13. The stent crimping system of claim 12, wherein when the crimping blades are in the open position, the width of the first protective strip is planar from the first edge of the first protective strip to the second edge of the first protective strip.

14. The stent crimping system of claim 13, wherein when the crimping blades are in the open position, the width of the second protective strip is planar from the first edge of the second protective strip to the second edge of the second protective strip.

15. A stent crimping system comprising:

a crimping head including a plurality of crimping blades which collectively define an iris for receiving a stent therein, the iris defining an opening extending through the crimping head from a first end of the crimping head to a second end of the crimping head, the plurality of crimping blades being movable between an open position in which the opening of the iris has a first perimeter to a closed position in which the opening of the iris has a second perimeter less than the first perimeter; and

a plurality of protective strips extending longitudinally through the opening of the iris of the crimping head from a feeder spool proximate the first end of the crimping head to a receiver spool proximate the second end of the crimping head, each of the plurality of strips being radially offset from one another around the perimeter of the opening of the iris, each protective strip having a width measured from a first edge of the protective strip to a second edge of the protective strip opposite the first edge of the protective strip;

wherein when the crimping blades are in the closed position, the entire width of each protective strip is positioned radially inward of the perimeter of the opening of the iris.

16. The stent crimping system of claim 15, wherein when the crimping blades are in the open position, the entire width of each protective strip is positioned radially inward of the perimeter of the opening of the iris.

17. The stent crimping system of claim 15, wherein a first portion of each protective strip overlaps a second portion of an adjacent protective strip when the crimping blades are in the closed position.

18. The stent crimping system of claim 17, wherein the first portion of each protective strip is a curved portion and the second portion is a curved portion.

19. The stent crimping system of claim 15, wherein the plurality of protective strips includes three protective strips arranged 120 degrees from one another.