Removable Stent

• US 20070233230A1
• Filed: 09/29/2004
• Published: 10/04/2007
• Est. Priority Date: 09/30/2003
• Status: Active Grant

• Current Assignee: Merit Medical Systems, Inc.
• Original Assignee: Merit Medical Systems, Inc.
• Inventors: Mangiardi, Eric, Nissl, Thomas
• Granted Patent: US 7,942,921 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• 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 2002/828 Means for connecting a plurality of stents allowing flexibility of the whole structure
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/9155 Adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/006 modular

Abstract

The invention is relative to a stent with a tubular support frame consisting of axially successively following, interconnected annular segments, which support frame is surrounded on its outside by a thread. The thread ends are guided via a deflection from the outside into support frame, where they are coupled by a connector consisting of a material visible in x-rays. Deflection is realized by two deflection elements in the form of eyelets provided on annular segment. Deflection elements are arranged on the circumference of support frame at an interval from one another and are provided on end-side annular segment, viewed in longitudinal direction L of the stent.

Claims

1. A stent with a tubular support frame (2) consisting of axially successively following, interconnected annular segments (3, 4, 5), wherein said support frame (2) is surrounded on its outside by a thread (11), characterized in that the thread ends (12, 13) are guided via a deflection (14) from the outside into the support frame (2), where they are coupled by a connector (17).

2. The stent according to claim 1, characterized in that the deflection (14) is realized at least one deflection element (15, 16;

19, 20;

22, 23;

26, 27) provided on an annular segment (3, 4).

3. The stent according to claim 1, characterized in that the deflection (14) is formed by two deflection elements (15, 16;

19, 20;

22, 23;

26, 27) arranged on the circumference of the support frame (2) with an interval (A) from one another.

4. The stent according to claim 1, characterized in that the deflection (14) is provided on an end-side annular segment (3), viewed in the direction of the longitudinal axis (L) of the stent.

5. The stent according to claim 1, characterized in that the deflection (14) is arranged on an inner side, facing the middle of the stent, of the annular segment (3).

6. The stent according to claim 1, characterized in that the deflection (14) is formed by two deflection elements (19, 20;

22, 23) of which a first deflection element (19;

22) is arranged on an inner side, facing the middle of the stent, of an annular segment (3) and that the second deflection element (20;

23) is arranged on an outer side of the annular segment (3).

7. The stent according to claim 3, characterized in that the deflection (14) is formed by two deflection elements (26, 27) of which a first deflection element (26) is provided on the end-side annular segment (3), viewed in the direction of the longitudinal axis (L) of the stent, and a second deflection element (27) is provided on the adjacent annular segment (4).

8. The stent according to claim 1, characterized in that the connector (17) consists of a material visible in x-rays.

9. The stent according to claim 1, characterized in that guide elements (28) are provided in the support frame (2).

10. The stent according to claim 1, characterized in that the annular segments (3, 4, 5) are formed by struts (6, 7) that follow one another in an endless, corrugated manner and that adjacent annular segments (3, 4, 9) are coupled by connector struts (8, 8′

).

11. The stent according to claim 10, characterized in that each connector strut (8, 8′

) comprises a longitudinal section (9) running substantially parallel to the longitudinal axis (L) of the stent and comprises a strut section (10) aligned transversely to the latter and configured in a U shape or V shape.