Removable Stent

• US 20070276463A1
• Filed: 09/29/2004
• Published: 11/29/2007
• Est. Priority Date: 09/30/2003
• Status: Active Grant

• Current Assignee: Merit Medical Systems, Inc.
• Original Assignee: Merit Medical Systems, Inc.
• Inventors: Nissl, Thomas, Mangiardi, Eric
• Granted Patent: US 7,806,918 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 2002/91516 the meander having a change in frequency along the band
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91566 connected trough to trough
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0059 temporary

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 segments. Deflection elements are arranged on the circumference of support frame at an interval from one another and are provided on end-side annular segments, viewed in longitudinal direction of the stent.

Claims

1. A stent with a tubular support frame (2) that can be widened out from an initial state (A) into a support state (S), in which the support state (2) consists of at least two annular segments (3-6) that are formed by struts (7,8, 9,10) that endlessly follow each other in a corrugated manner via transitional sections (1,12) and in which adjacent annular segments (3-6) are coupled by connectors (13), characterized in that every second front transitional section (12) on the end-side annular segments (3;

6), viewed in the direction of the longitudinal axis (L) of the stent, has a widened head end (18) that projects axially opposite the adjacent transitional sections (11) and has a convexly rounded front section (19) and concavely rounded throat sections (20, 21) between the head end (18) and the struts (9,10) connected to the head end (18).

2. The stent according to claim 1, characterized in that the head ends (18) are configured in a mushroom shape and that the convex front sections (19) and the concave throat sections (20,21) are connected to each other by rounded edge sections (22,23).

3. The stent according to claim 1, characterized in that the throat sections (20, 21) extend at least in areas over the edge-side transitional sections (11) of the adjacent struts (7,8) in the initial state (A).

4. The stent according to claim 1, characterized in that deflection elements (24,25) for a thread looping around the outside of the support frame (2) are arranged on the end-side annular segments (3, 6), viewed in the direction of the longitudinal axis (L) of the stent.

5. The stent according to claim 1, characterized in that each connector (13,13′

) is designed like a strut and has a longitudinal section (14,14′

) running substantially parallel to the longitudinal axis L of the stent and comprises a compensation section (15,15′

) aligned transversally to the latter and configured in a U or V shape.

6. The stent according to claim 5, characterized in that the U-shaped compensation sections (15,15′

) of the connectors (13,13′

) are arranged in the area (16) between two axially adjacent, spaced annular segments (3,4, 5,6).

7. The stent according to claim 1, characterized in that the connectors (13,13′

) extend out from the ridge area (17) of two struts (7,8) of an annular segment (4, 5) between two struts (7, 8) of the adjacent annular segment (3, 4,5, 6) up to the transitional section (11) of these struts (7,8).

8. The stent according to claim 1, characterized in that the connectors (13,13′

) are aligned in axial succession.