Stent and method for manufacturing the stent

• US 20060064158A1
• Filed: 08/31/2005
• Published: 03/23/2006
• Est. Priority Date: 09/01/2004
• Status: Active Grant

• Current Assignee: Angiomed GmbH & Co. Medizintechnik KG
• Original Assignee: PST, LLC
• Inventors: Jahrmarkt, Scott L., Slater, Charles R., Bales, Thomas O.
• Granted Patent: US 7,763,067 B2
• Time in Patent Office: Days
• US Class Current: 623/1.220
• 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, a diameter of between approximately 4 mm and approximately 12 mm, in particular, 8 mm, and a length of between approximately 10 mm and approximately 250 mm, in particular, 150 mm, and struts disposed helically about the circumference in turns. Substantially circumferentially oriented connecting bridges connect respectively adjacent ones of the turns. 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;

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 in turns; and

substantially circumferentially oriented connecting bridges connecting respectively adjacent ones of said turns.

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

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

4. The stent according to claim 2, wherein said length is between approximately 25 mm and approximately 150 mm.

5. The stent according to claim 1, wherein said struts are s-shaped and have straight portions and curved portions connecting respectively adjacent ones of said straight portions.

6. The stent according to claim 1, wherein:

said stent body has an expanded state;

said struts define an outer circumferential cylinder in said expanded state; and

said connecting bridges are raised from said outer circumferential cylinder when said stent body is in said expanded state.

7. The stent according to claim 1, wherein:

said stent body has an expanded state;

said struts define an outer circumferential cylinder in said expanded state; and

said connecting bridges form bumps radially extending outside said outer circumferential cylinder when said stent body is in said expanded state for anchoring said stent body when implanted.

8. The stent according to claim 1, wherein:

said stent body has a non-expanded state and an expanded state; and

said connecting bridges are circumferentially oriented in said expanded state.

9. The stent according to claim 1, wherein:

said stent body has a non-expanded state and an expanded state; and

said connecting bridges are circumferentially oriented in said non-expanded state and said expanded state.

10. The stent according to claim 1, wherein:

said turns define a helical gap therebetween; and

said bridges connect said adjacent ones of said turns across said helical gap.

11. A stent, comprising:

a stent body having;

a circumference;

an expanded state;

struts disposed helically about said circumference in turns and defining an outer circumferential cylinder in said expanded state; and

substantially circumferentially oriented bridges connecting adjacent ones of said turns, said bridges being raised from said outer circumferential cylinder when said stent body is in said expanded state.

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

13. The stent according to claim 11, wherein said length is between approximately 25 mm and approximately 150 mm.

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

15. The stent according to claim 11, wherein said struts are s-shaped and have straight portions and curved portions connecting respectively adjacent ones of said straight portions.

16. The stent according to claim 11, wherein:

said stent body has a non-expanded state and an expanded state; and

said connecting bridges are circumferentially oriented in said expanded state.

17. The stent according to claim 11, wherein:

said stent body has a non-expanded state and an expanded state; and

said connecting bridges are circumferentially oriented in said non-expanded state and said expanded state.

18. The stent according to claim 11, wherein:

said turns define a helical gap therebetween; and

said bridges connect said adjacent ones of said turns across said helical gap.

19. A stent, comprising:

a stent body having;

a circumference;

struts disposed helically about said circumference in turns, said turns defining a helical gap therebetween; and

circumferentially oriented bridges connecting adjacent ones of said turns across said helical gap.

20. The stent according to claim 19, wherein:

said diameter is between approximately 4 mm and approximately 8 mm; and

said length is between approximately 25 mm and approximately 150 mm.

21. The stent according to claim 19, wherein:

said stent body has an expanded state;

said struts define an outer circumferential cylinder in said expanded state; and

said connecting bridges are raised from said outer circumferential cylinder when said stent body is in said expanded state.

22. The stent according to claim 19, wherein:

said stent body has a non-expanded state and an expanded state; and

said connecting bridges are circumferentially oriented in said non-expanded state and said expanded state.