Non-cylindrical mesh top stent with twisted sections

• US 10,709,543 B2
• Filed: 07/18/2018
• Issued: 07/14/2020
• Est. Priority Date: 07/19/2017
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Inventors: Bradway, Ryan C., Kratzberg, Jarin A., Gibbons, Jr., William S.
• Primary Examiner(s): Sweet, Thomas
• Assistant Examiner(s): Shipmon, Tiffany P
• Application Number:
  US16/038,833
• Publication Number:
  US 20190021841A1
• Time in Patent Office: 727 Days
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/92 Stents in the form of a rolled-up sheet expanding after insertion into the vessel , e.g. with a spiral shape in cross-section
• CPC Class Codes: A61F 2002/823 Stents, different from stent-grafts, adapted to cover an aneurysm
• CPC Class Codes: A61F 2230/0004 Rounded shapes, e.g. with rounded corners
• CPC Class Codes: A61F 2230/0065 toroidal, e.g. ring-shaped, doughnut-shaped
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A stent is provided having a plurality of intersecting elongated members arranged to form a plurality of cells, the plurality of cells defining an elongated tube with a lumen running therethrough. The elongated tube has first, second, and third sections, the first section having a substantially first diameter and the third section having a substantially constant second diameter that is larger than the substantially constant first diameter of the first section, wherein the diameter of the second section transitions from the first diameter to the second diameter. Each of the plurality of cells within the first section have a pitch that is tighter than each of the plurality of cells within the second and third sections. In the second section, the plurality of intersecting elongated members includes a plurality of pairs of elongated members, wherein each pair of elongated members includes two adjacent elongated members twisted axially around each other.

Claims

1. A stent, comprising:

a plurality of intersecting elongated members arranged to form a plurality of cells, the plurality of cells defining an elongated tube with a lumen running therethrough, wherein the elongated tube comprises first, second, and third sections, the first section having a substantially constant first diameter and the third section having a substantially constant second diameter that is larger than the substantially constant first diameter of the first section, wherein the diameter of the second section transitions from the first diameter to the second diameter, wherein the diameter of the second section transitions from the first diameter to the second diameter via a concave curvature extending proximally from the first section and a convex curvature extending proximally from the concave curvature to the third section,

wherein a proximal end of the third section of the stent comprises a plurality of rounded ends formed by the plurality of intersecting elongated members,

wherein each of the plurality of cells within the first section have a pitch that is tighter than each of the plurality of cells within the second and third sections, and

wherein in the second section, the plurality of intersecting elongated members comprises a plurality of pairs of elongated members, wherein each pair of elongated members comprises two adjacent elongated members that define a side of two adjacent cells and are twisted axially around each other to form a twist between each of two adjacent elongated members.

2. The stent of claim 1, wherein each of the twists has no free ends.

3. The stent of claim 2, wherein each of the twists extend from a proximal end of the first section to a distal end of the third section.

4. The stent of claim 3, wherein the twists have a proximal end and distal end and the distal ends of each twist are at a proximal apex of a cell of the first section.

5. The stent of claim 2, wherein each of the twists comprises a plurality of twists.

6. The stent of claim 1, wherein the second and third sections have a curvature configured to conform to a curvature of a body vessel.

7. A stent graft, comprising:

a plurality of intersecting elongated members arranged to form a plurality of cells, the plurality of cells defining an elongated tube with a lumen running therethrough, wherein the elongated tube comprises first, second, and third sections, the first section having a substantially constant first diameter and the third section having a substantially constant second diameter that is larger than the substantially constant first diameter of the first section, wherein the diameter of the second section transitions from the first diameter to the second diameter, wherein the diameter of the second section transitions from the first diameter to the second diameter via a concave curvature extending proximally from the first section and a convex curvature extending proximally from the concave curvature to the third section,

wherein a proximal end of the third section of the stent comprises a plurality of rounded ends formed by the plurality of intersecting elongated members,

wherein each of the plurality of cells within the first section have a pitch that is tighter than each of the plurality of cells within the second and third sections, and

wherein in the second section, the plurality of intersecting elongated members comprises a plurality of pairs of elongated members, wherein each pair of elongated members comprises two adjacent elongated members that define a side of two adjacent cells and are twisted axially around each other to form a twist between each of two adjacent elongated members; and

a tube of graft material covering a portion of the stent from adjacent a distal end of the twists to a distal end of the stent.

8. The stent of claim 7, wherein each of the twists has no free ends.

9. The stent of claim 8, wherein each of the twists extend from a proximal end of the first section to a distal end of the third section.

10. The stent of claim 9, wherein the twists have a proximal end and a distal end and the distal ends of each twist are at a proximal apex of a cell of the first section.

11. The stent of claim 8, wherein each of the twists comprises a plurality of twists.

12. The stent of claim 7, wherein the second and third sections have a curvature configured to conform to a curvature of a body vessel.