Stent

• US 9,925,076 B2
• Filed: 04/17/2014
• Issued: 03/27/2018
• Est. Priority Date: 04/22/2013
• Status: Active Grant

• Current Assignee: Novatech SA (Bess AG)
• Original Assignee: Novatech SA (Bess AG)
• Inventors: Nissl, Thomas
• Primary Examiner(s): Sweet, Thomas J
• Assistant Examiner(s): Wolf, Megan
• Application Number:
  US14/786,112
• Publication Number:
  US 20160143757A1
• Time in Patent Office: 1,440 Days
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• 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 2230/006 Y-shaped
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A stent in the form of a generally tubular body has multiple annularly expandable serpentine elements. The serpentine elements have arcs at the first and second element ends which point in the axial direction of the stent. Annularly expandable serpentine elements which follow one another in the axial direction are connected to one another via connectors which are arranged at the ends of the adjacent elements. The connectors extend in the circumferential direction of the stent in the non-expanded state of the stent and have a curvature in the circumferential direction. In the expanded state of the stent, the curvature is so great in the circumferential direction that the connectors project radially outward beyond the circumference of the serpentine elements.

Claims

1. A stent in the form of a substantially tubular body, comprising:

multiple serpentine, annularly expandable elements, said serpentine elements having first and second ends facing in an axial direction of the stent, said first and second ends having arcs; and

Y-shaped connectors connecting at least three axially adjacent ones of the serpentine elements, each of said connectors having a single base arm and two fork arms having a forking point exclusively connected to the single base arm, said single base arm being connected to one of the arcs of the second end of one of the adjacent serpentine elements, said two fork arms being connected to two neighboring ones of the arcs of the first end of another one of the adjacent serpentine elements in one to one correspondence,

wherein in a non-expanded state of the stent the connectors extend in a circumferential direction of the stent and have a curvature in the circumferential direction, said curvature in an expanded state of the stent having a size in the circumferential direction so that at least a portion of the base arm and a portion of the fork arms of the connectors protrude radially outwardly over a circumference of each of the serpentine elements.

2. The stent of claim 1, wherein in the non-expanded state of the stent, the connectors extend over an angle in a range of 120°

to 240°

.

3. The stent of claim 1, wherein in the expanded state of the stent a respective one of the connectors extends over an angle in a range from 30°

to 85°

.

4. The stent of claim 1, wherein axially adjacent ones of the connectors extend in opposite orientations.

5. The stent of claim 1, wherein all arcs of one of the serpentine elements are connected with the arcs of a neighboring one of the serpentine elements via the connectors.

6. The stent of claim 1, wherein when viewed in a development plane of the stent, the base arm is curved, so that the one of the arcs of the second end of the one of the adjacent serpentine elements is located in a different circumferential section than the neighboring arcs of the first end of the another one of the adjacent serpentine elements with which the two fork arms are connected.

7. The stent of claim 1, wherein when viewed in a development plane of the stent, the two fork arms have a curved configuration, so that the forking point at which the base arm is connected with the two fork arms is located in a different circumferential section than neighboring arcs of the first end of the another one of the adjacent serpentine elements with which the two fork arms are connected.

8. The stent of claim 7, wherein the curved configuration of the two fork arms is formed by respective fork arm arcs on the two fork arms, wherein the fork arm arcs differ from each other regarding a radius of curvature when viewed in a development plane of the stent.

9. The stent of the claim 1, wherein the fork arms of a respective one of the connectors have different lengths.

10. The stent of claim 1, wherein the two fork arms have respective first length sections, said first length sections when viewed in a development plane of the stent extending parallel to each other and having different lengths.

11. The stent of claim 1, wherein the connectors, when viewed in a development plane of the stent, have an S-shaped extent from the one of the arcs of the second end of the one of the adjacent serpentine elements to the two neighboring ones of the arcs of the first end of the another one of the adjacent serpentine elements.

12. The stent of claim 1, wherein a thickness of the base arm and the two fork arms of a connector measured in a radial direction is greater than a width of the base arm and the two fork arms measured in the circumferential direction.