Tubular stent consists of chevron-shape expansion struts and contralaterally attached diagonal-connectors

• US 8,562,665 B2
• Filed: 12/17/2002
• Issued: 10/22/2013
• Est. Priority Date: 02/02/1998
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Jang, G. David
• Primary Examiner(s): Bui, Vy Q
• Application Number:
  US10/321,005
• Publication Number:
  US 20030093144A1
• Time in Patent Office: 3,962 Days
• Field of Search: 623/1.15, 623/1.16, 623/1.35, 606/191, 606/194, 606/195, 606/198
• US Class Current: 623/1.15
• 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 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• 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

Abstract

A circumferentially connected stent in a non-expanded state with a longitudinal axis, includes a first expansion column strut pair having a first expansion strut, a second expansion strut with a joining strut. The first expansion column strut pair defines a chevron shaped slot, and a plurality of the first expansion strut pair forms a first expansion column. A second expansion column strut pair includes a first expansion strut, a second expansion strut and a joining strut. The second expansion column strut pair defines a chevron shaped slot, and a plurality of the second expansion strut pair forms a second expansion column. A first serial connecting strut column is formed of a plurality of first connecting struts, and the first connecting strut column couples the first expansion column to the second expansion column.

Claims

1. A medical device comprising:

a radially expandable stent comprising

a hollow, cylindrical body comprising first and second rings extending circumferentially around the cylindrical body, each ring comprising an undulating series of peaks and valleys formed by struts connecting alternating curved peak and valley segments within the ring, the struts comprising a first curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within a ring form a nested chevron pattern; and

a plurality of longitudinal connections between the first and second rings,

wherein each of the peaks and valleys have sides,

wherein one of the plurality of longitudinal connections is attached to a side of a first peak in the first ring and to a contralateral side of a first valley in the second ring;

wherein the first and second rings are arranged in an antiparallel chevron pattern relative to each other.

2. The medical device of claim 1 wherein the struts further comprise a second curved segment positioned near a curved peak or valley segment.

3. The medical device of claim 1 wherein the peaks of the first ring are not longitudinally aligned with the valleys of the second ring.

4. The medical device of claim 3 wherein the peaks of the first ring are longitudinally aligned with the peaks of the second ring.

5. The medical device of claim 1 wherein at least one longitudinal connection is formed by a longitudinal connector.

6. The medical device of claim 5 wherein at least one longitudinal connector is curved.

7. The medical device of claim 5 wherein at least one longitudinal connector is straight.

8. The medical device of claim 1 further comprising at least one radiopaque marker.

9. The medical device of claim 1 wherein the radially expandable stent is a balloon-expandable stent.

10. The medical device of claim 1 wherein the radially expandable stent is a self-expanding stent.

11. The stent of claim 1,

wherein the struts of each ring form a plurality of strut pairs,

wherein one strut of a strut pair is chevron-shaped and the other strut of the strut pair has a stair-step configuration,

wherein each of the plurality of longitudinal connections has a first end and a second end, and

wherein the first end of one of the plurality of longitudinal connections is attached to a chevron-shaped strut in the first ring and the second end of the longitudinal connection is attached to a strut comprising a stair-step configuration in the second ring.

12. The stent of claim 1, wherein the plurality of longitudinal connections between the first and second rings are S-shaped.

13. The stent of claim 12,

wherein the cylindrical body further comprises a third ring extending circumferentially around the cylindrical body, the third ring comprising an undulating series of peaks and valleys formed by struts connecting alternating curved peak and valley segments within the third ring, the struts comprising a third curved segment curved substantially symmetrically about a single circumference of the stent such that the peaks and valleys within the third ring form a nested chevron pattern,

wherein the stent further comprises a plurality of longitudinal connections between the second and third rings,

wherein the struts of the third ring form a plurality of strut pairs,

wherein one strut of a strut pair of the third ring is chevron-shaped,

wherein each of the plurality of longitudinal connections between the second ring and the third ring has a first end and a second end, and

wherein the first end of one of the plurality of longitudinal connections between the second ring and the third ring is attached to a chevron-shaped strut in the second ring and the second end of the longitudinal connection between the second ring and the third ring is attached to a strut comprising a chevron-shaped strut in the third ring.

14. The stent of claim 13, wherein the plurality of longitudinal connections between the second ring and third ring are mirror images of the S-shaped longitudinal connections between the first and second rings taken along a circumferential axis.