Stent and method for manufacturing the stent

• US 7,763,067 B2
• Filed: 08/31/2005
• Issued: 07/27/2010
• Est. Priority Date: 09/01/2004
• Status: Active Grant

• Current Assignee: Angiomed GmbH & Co. Medizintechnik KG
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Jahrmarkt, Scott L., Slater, Charles R., Bales, Thomas O.
• Primary Examiner(s): Stewart; Alvin J
• Application Number:
  US11/216,228
• Publication Number:
  US 20060064158A1
• Time in Patent Office: 1,791 Days
• Field of Search: 623/1.15, 623/1.22, 623/1.21, 623/1.35, 623/1.11, 623/1.18, 623/1.2, 623/1.19
• US Class Current: 623/1.22
• 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:

struts joined together to form a series of helical turns and defining an outer circumferential cylinder of the stent in an expanded state of the stent, the struts having first and second curved strut portions connecting adjacent straight strut portions, the second curved strut portions extending farther from the straight strut portions than the first curved strut portions; and

connecting bridges disposed between each of the series of helical turns, each connecting bridge having one bridge strut with first and second ends, the first bridge strut end connected directly to a second curved strut portion of one of the series of helical turns and the second bridge strut end connected directly to a second curved strut portion of an adjacent one of the series of helical turns, the connecting bridges having edges perpendicular to an axis of the stent, the connecting bridges being raised from the outer circumferential cylinder when the stent is in the expanded state.

2. The stent according to claim 1, wherein a diameter of the stent between approximately 4 mm and approximately 8 mm.

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

4. The stent according to claim 1, wherein a length of the stent between approximately 25 mm and approximately 150 mm.

5. The stent according to claim 1, wherein said struts are s-shaped.

6. The stent according to claim 1, wherein:

said stent has a non-expanded state; and

said connecting bridges are circumferentially oriented in said expanded state.

7. The stent according to claim 1, wherein:

said stent has a non-expanded state; and

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

8. The stent according to claim 1, wherein:

said turns define a helical gap between adjacent turns; and

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

13. The stent of claim 1, the second curved strut portions having a longitudinal offset relative to a space between adjacent turns defined by the first curved strut portions.

9. A stent, comprising:

struts joined together to form a series of helical turns and defining a circumference of the stent, the series of helical turns defining a helical gap between adjacent turns, the struts having first and second curved strut portions connecting adjacent straight strut portions, the second curved strut portions extending farther from the straight strut portions than the first curved strut portions; and

connecting bridges connecting adjacent turns across the helical gap, each connecting bridge having one bridge strut with first and second ends, the first bridge strut end connected directly to a second curved strut portion of one of the series of helical turns and the second bridge strut end connected directly to a second curved strut portion of an adjacent one of the series of helical turns, the connecting bridges curved in a plane perpendicular to an axis of the stent, the connecting bridges being raised from the outer circumference of the stent when the stent is in an expanded state.

10. The stent according to claim 9, wherein:

a diameter of the stent between approximately 4 mm and approximately 8 mm; and

a length of the stent between approximately 25 mm and approximately 150 mm.

11. The stent according to claim 9, wherein:

said stent 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 is in said expanded state.

12. The stent according to claim 9, wherein:

said stent 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.

14. The stent of claim 9, the second curved strut portions having a longitudinal offset relative to a space between adjacent turns defined by the first curved strut portions.

15. The stent of claim 9, the first curved strut portions of adjacent turns not being connected to each other.