Stent and method for manufacturing the stent

• US 20060064154A1
• Filed: 08/31/2005
• Published: 03/23/2006
• Est. Priority Date: 09/01/2004
• Status: Active Grant

• Current Assignee: Angiomed GmbH and Co Medizentechnik KG (Becton, Dickinson & Co)
• Original Assignee: PST, LLC
• Inventors: Jahrmarkt, Scott L., Slater, Charles R., Bales, Thomas O.
• Granted Patent: US 7,780,721 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• CPC Class Codes: A61F 2/844 folded prior to deployment
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• 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 2002/0864 Fixation of tendon or ligament between anchor elements, e.g. by additional screws in the anchor, anchor crimped around tendon
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91583 by a bridge, whereby at least one of its ends is connected along the length of a strut between two consecutive apices within a band
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

A stent includes a stent body having a circumference and struts disposed helically about the circumference. Each of the struts has a strut length and a ratio of a number of the struts around the circumference to the strut length is greater than 800 per inch, in particular, over 1000 per inch. A method for manufacturing a helical stent includes the steps of providing a stent body with struts disposed about the circumference thereof in turns and with bridges connecting the struts in adjacent turns. The stent body is expanded and, thereafter, some of the bridges, in particular, sacrificial bridges, are removed.

Claims

1. A stent, comprising:

a stent body having;

a circumference; and

struts disposed helically about said circumference, each of said struts having a strut length; and

a ratio of a number of said struts around said circumference to said strut length being greater than 800 per inch.

2. The stent according to claim 1, wherein said ratio is greater than 1000 per inch.

3. The stent according to claim 1, wherein said diameter is between approximately 4 mm and approximately 8 mm.

4. The stent according to claim 1, wherein said length is between approximately 25 mm and approximately 150 mm.

5. The stent according to claim 1, wherein;

said struts are disposed helically about said circumference along at least one helical turn; and

a number of said struts in said at least one helical turn is between 36 and 50.

6. A stent, comprising:

a stent body having struts in an M-D Ratio of greater than 800 per inch.

7. The stent according to claim 6, wherein said M-D Ratio is greater than 1000 per inch.

8. The stent according to claim 6, wherein;

said stent body has a circumference;

said struts are disposed helically about said circumference along at least one helical turn; and

a number of said struts in said at least one helical turn is between 36 and 50.

9. The stent according to claim 6, wherein said stent body has:

a diameter between approximately 4 mm and approximately 8 mm; and

a length between approximately 25 mm and approximately 150 mm.

10. A stent, comprising:

a stent body having;

a diameter of between approximately 4 mm and approximately 12 mm and a length of between approximately 10 mm and approximately 250 mm;

struts disposed helically about said circumference along at least one helical turn; and

each of said struts having a strut length of between approximately 600 and approximately 1200 microns.

11. The stent according to claim 10, wherein said diameter is between approximately 4 mm and approximately 8 mm.

12. The stent according to claim 10, wherein said length is between approximately 25 mm and approximately 150 mm.

13. The stent according to claim 10, wherein:

said stent body has a circumference; and

a ratio of a number of said struts around said circumference to said strut length is greater than 800 per inch.

14. The stent according to claim 13, wherein said ratio is greater than 1000 per inch.

15. The stent according to claim 10, wherein;

said stent body has a circumference; and

a number of said struts in said at least one helical turn is between 36 and 50.

16. A stent, comprising:

a stent body having;

a diameter of between approximately 4 mm and approximately 12 mm and a length of between approximately 10 mm and approximately 250 mm;

struts disposed helically about said circumference along at least one helical turn; and

a number of said struts in said at least one helical turn being between 36 and 50.

17. The stent according to claim 16, wherein said diameter is between approximately 4 mm and approximately 8 mm.

18. The stent according to claim 16, wherein said length is between approximately 25 mm and approximately 150 mm.

19. The stent according to claim 16, wherein:

said stent body has a circumference;

each of said struts has a strut length; and

a ratio of a number of said struts around said circumference to said strut length is greater than 800 per inch.

20. The stent according to claim 19, wherein said ratio is greater than 1000 per inch.