Stent comprising terminal anchoring elements

• US 20070067016A1
• Filed: 09/16/2004
• Published: 03/22/2007
• Est. Priority Date: 09/16/2003
• Status: Active Grant

• Current Assignee: Pfm Medical AG
• Original Assignee: Pfm Medical AG
• Inventors: Jung, Johannes
• Granted Patent: US 9,101,502 B2
• Time in Patent Office: Days
• US Class Current: 623/1.160
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• 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 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2210/0019 operated at only one temperature whilst inside or touching the human body, e.g. constrained in a non-operative shape during surgery, another temperature only occurring before the operation
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2250/0037 differing in height or in length
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

The invention relates to a stent comprising terminal anchoring elements. Said stent (10) is provided with a tubular wall that extends along a longitudinal, flexible tubular axis (26), is formed from a flexible grid structure, and has tube ends (20) lying on opposing axis ends. Said wall consists of annular wall segments (11) that are lined up along the axis and are interconnected by means of connection segments (12). The annular wall segments (11) contain wall elements (14, 15) having an elastic structure. The inventive stent is characterised in that the wall comprises a flexible, arched anchoring element (22) on at least one tube end (20, 20′), said anchoring element being connected to at least two terminal wall elements (14, 15, 14′, 15′) in such a way as to form one component, bridging at least one elastic wall element (14, 15), and there is a larger radial distance between the ogive (24) of the arched anchoring element (22) and the tubular axis (26) than between the terminal wall elements (14, 15) and the tubular axis.

Claims

1. Stent (10) with a tubular wall formed from a flexible grid structure and progressing around a longitudinal, flexible tubular axis (26), possessing tube ends (20) disposed at opposite axis ends, wherein the wall is comprised of annular wall segments (11) disposed sequentially along the axis and connected to one another by means of connecting segments (12), and wherein the annular wall segments (11) comprise wall elements (14, 15) with an elastic structure, characterized in that the wall has, on at least one tube end (20, 20′

), a flexible, curved anchoring element (22) which is integrally connected with at least two terminal wall elements (14, 15, 14′

, 15′

) and bridges at least one elastic wall element (14, 15), and that the curved anchoring element (22) features, at its curve tip (24), a larger radial distance from the tube axis (26) than the terminal wall elements (14, 15).

2. Stent, as recited in claim 1, characterized in that the curve of the anchoring element (22) is V-shaped.

3. Stent, as recited in claim 1, characterized in that the curve of the anchoring element (22) has a larger material thickness than the wall elements (14, 15).

4. Stent, as recited in claim 1, characterized in that the anchoring element bridges at least two wall elements (14, 15).

5. Stent, as recited in claim 1, characterized in that it has at least three anchoring elements (22).

6. Stent, as recited in claim 1, characterized in that the curve tip (24) has a radiopaque region.

7. Stent, as recited in one of the preceding claims, characterized in that the curved anchoring element (22) is bent outward in a curved shape in the direction of its tip (24).

8. Stent, as recited in claim 7, characterized in that the curvature increased in the direction of the curve tip (24).

9. Stent, as recited in one of the preceding claims, characterized in that the wall elements (14, 15) of the wall segments (11) of the opposite tube end (20) feature radiopaque regions (24).

10. Stent, as recited in one of the preceding claims, characterized in that the opposite tube end (20′

) relative to the tubular axis (26) is radially expanded and has a larger diameter than the center of the stent.

11. Stent, as recited in one of the preceding claims, characterized in that the expansion along the tubular axis (26) begins at least two annular wall segments (11) before the end.

12. Stent, as recited in one of the preceding claims, characterized in that, at the tube end (20, 20′

) on at least the terminal wall segment (11) and the wall segment (11) axially disposed in front of it, each wall element (14, 15) of the terminal segment (11) is connected with its element (14, 15), axially disposed in front of it, of the next segment (11) by means of a connecting segment (12).