RING STENT

• US 20120035710A1
• Filed: 10/21/2011
• Published: 02/09/2012
• Est. Priority Date: 10/10/2003
• Status: Active Grant

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Inventors: Hartley, David Ernest
• Granted Patent: US 9,050,181 B2
• Time in Patent Office: Days
• US Class Current: 623/1.16
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2/90 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 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/91591 Locking connectors, e.g. using male-female connections
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

A stent arrangement which has at least a first ring (3) and zig zag struts (5) extending axially from the periphery of the ring. There can be first and second rings (3, 4) axially spaced apart and defining substantially parallel planes and a plurality of zig zag portions (5) between the first and second ring portions around the periphery thereof. The stent can be formed from a single wire or laser cut from a cannula and can be covered or uncovered.

Claims

1. A stent arrangement comprising a first resilient ring and a second resilient ring, the second ring being substantially parallel to and spaced axially apart from the first ring and a plurality of zig zag portions extending between and around the periphery of a least one of the first ring and second ring.

2. A stent arrangement as in claim 1 wherein at least one of the first ring and the second ring comprises a metallic material.

3. A stent arrangement as in claim 1 wherein at least one of the first ring and the second ring comprises at least one of a wire and a metal cannula.

4. A stent arrangement as in claim 1 wherein at least one of the first ring and the second ring and the zig zag portions comprise a single piece of wire.

5. A stent arrangement as in claim 1 wherein each zig zag portion including a plurality of struts with a bend between adjacent struts.

6. A stent arrangement as in claim 5 wherein the bends between the struts are adjacent at least one of the first ring and the second ring.

7. A stent arrangement as in claim 3 wherein the first ring and second ring each includes first and second turns of the at least one of the wire and the metal cannula.

8. A stent arrangement as in claim 3 wherein a terminal end of the wire in each ring is provided with a loop, whereby the stent does not present a pointed end of wire or metal cannula which could damage a vessel.

9. A stent arrangement as in claim 1 wherein the first ring is adjacent alternate bends of the zig zag portion and the second ring is spaced apart from the first ring and adjacent an opposite bend of the zig zag portion.

10. A stent arrangement comprising at least one ring of a portion of wire and a plurality of zig zag portions of a portion of wire extending axially from and around a periphery of the ring.

11. A stent arrangement as in claim 10 wherein the ring and the zig zag portions comprise a single piece of wire.

12. A stent arrangement as in claim 10 wherein each zig zag portion includes struts with a bend between adjacent struts.

13. A stent arrangement as in claim 10 wherein each zig zag portion includes at least two struts with a bend between, a circumferential portion and another bend between adjacent struts.

14. A stent arrangement as in claim 12 wherein the bends between the struts are adjacent the ring.

15. A stent arrangement as in claim 10 wherein there are at least two turns of wire in the ring.

16. A stent arrangement as in claim 10 wherein a terminal end of the wire in the ring includes a loop, whereby the stent does not present a pointed end of wire which could damage a vessel into which it is deployed.

17. A stent arrangement as in claim 10 wherein the ring is adjacent alternate bends of the zig zag portion and a second ring is spaced apart from the first ring and adjacent an opposite bend of the zig zag portion.

18. A stent arrangement as in claim 17 wherein there are at least two turns of wire in the second ring and a terminal end of the wire in the second ring includes a loop so that the stent does not present a pointed end of wire which could damage a vessel.

19. A stent arrangement comprising a first ring formed from a portion of wire, a second ring formed from a portion of wire, the second ring defining a plane which is substantially parallel to and spaced axially apart from the plane of the first ring and a plurality of zig zag portions extending between and around the periphery of the first and second rings.

20. A stent arrangement as in claim 19 wherein the stent is in a substantially cylindrical or drum form and is covered or lined with a biocompatible graft material.

21. A stent arrangement as in claim 19 wherein each of the first and second rings is made in a “

wavy”

form with the apices of the waves extending towards the other ring.

22. A stent arrangement as in claim 19 wherein the stent is stacked with sequential rings and zig-zags to make a longer tubular stent.