Stent and method for manufacturing the stent

• US 10,342,685 B2
• Filed: 09/30/2016
• Issued: 07/09/2019
• Est. Priority Date: 09/01/2004
• Status: Active Grant

• Current Assignee: Angiomed GmbH & Co. Medizintechnik KG
• Original Assignee: Angiomed GmbH & Co. Medizintechnik KG
• Inventors: Bales, Jr., Thomas O., Slater, Charles R., Jahrmarkt, Scott
• Primary Examiner(s): Dang, Anh T
• Application Number:
  US15/282,735
• Publication Number:
  US 20170020698A1
• Time in Patent Office: 1,012 Days
• 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 series of helical windings defining an outer circumference of a cylinder. The helical windings include a plurality of struts having straight portions connected by curved portions. The straight portions may be substantially aligned with a longitudinal axis of the stent when the stent is in a reduced state. A plurality of bridges connect adjacent windings. The bridges may be substantially orthogonal to the longitudinal axis of the stent in the reduced state. A plurality of radiopaque members extend from a terminal helical winding. The radiopaque members include an extension portion and an end portion. The extension portion may have a first width and the end portion may have a second width greater than the first width. The end portion may include an extreme end substantially orthogonal to the longitudinal axis of the stent.

Claims

1. A stent having a reduced state and an expanded state, comprising:

a series of helical windings including a plurality of struts having a plurality of straight portions connected by a plurality of curved portions,

a plurality of bridges connecting adjacent windings, wherein each bridge of the plurality of bridges lies in a plane perpendicular to a longitudinal axis of the stent in both the reduced state and the expanded state;

and

a plurality of radiopaque members extending from a terminal helical winding, each of the radiopaque members including an extension portion and an end portion, the extension portion having a first width and the end portion having a second width greater than the first width, the end portion having an extreme end substantially orthogonal to the longitudinal axis of the stent in both the reduced state and the expanded state, wherein the extension portion is adjacent to the terminal helical winding.

2. The stent of claim 1, wherein the end portion of each of the radiopaque members together define a circumferential plane substantially orthogonal to the longitudinal axis of the stent.

3. The stent of claim 1, wherein the extension portion of a first radiopaque member has a length different from the extension portion of a second adjacent radiopaque member.

4. The stent of claim 3, wherein the extension portion of each radiopaque member has a length different from an adjacent radiopaque member.

5. The stent of claim 1, wherein the extreme end of the end portion is circumferentially flat.

6. The stent of claim 1 wherein a helical direction of the windings is opposite of an advancing direction of the bridges.

7. A stent having a reduced state and an expanded state, comprising:

a series of helical windings, the helical windings including a plurality of struts having a plurality of s-shaped portions or straight portions connected by a plurality of curved portions, the s-shaped portions or straight portions are substantially aligned with a longitudinal axis of the stent in the reduced state;

a plurality of bridges connecting adjacent windings, wherein each bridge of the plurality of bridges lies parallel to a plane orthogonal to the longitudinal axis of the stent in both the reduced state and the expanded state.

8. The stent of claim 7, wherein the stent further comprises a plurality of radiopaque members extending from a terminal helical winding, each of the radiopaque members including an extension portion and an end portion.

9. The stent of claim 8, wherein the s-shaped portions or the straight portions of at least some of the struts are not aligned with the longitudinal axis in the expanded state.

10. The stent of claim 9, wherein at least some of the struts are v-shaped in the expanded state.

11. The stent of claim 10, wherein the extension portion is adjacent to the helical winding.

12. The stent of claim 11, wherein the series of helical windings form a single helix.

13. The stent of claim 12, wherein one or more of the plurality of struts are s-shaped struts.

14. The stent of claim 13, further comprising sacrificial bridges between adjacent windings.

15. The stent of claim 14, wherein the end portion comprises a radiopaque element.

16. The stent of claim 15, wherein a helical direction of the windings is opposite of an advancing direction of the bridges.