Stent

• US 7,722,661 B2
• Filed: 12/19/2007
• Issued: 05/25/2010
• Est. Priority Date: 12/19/2007
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Gregorich, Daniel, Lenz, Jason T.
• Primary Examiner(s): Sweet; Thomas J
• Assistant Examiner(s): Sharma; Yashita
• Application Number:
  US11/960,333
• Publication Number:
  US 20090163991A1
• Time in Patent Office: 888 Days
• Field of Search: 623/1.39, 623/1.42, 623 11- 122
• 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 2002/91541 Adjacent bands are arranged out of phase
• 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 2250/0068 the pharmaceutical product being in a reservoir

Abstract

A stent with strut bands and connectors, wherein the strut bands have long and short struts with a junction positioned between the short struts. Each junction defines a reservoir, wherein the reservoirs of a strut band are substantially circumferentially aligned. The connectors each have arms, wherein each arm includes an opposing U-shaped link. The opposing links have a shared portion disposed between a peak on one strut band and a longitudinally adjacent trough of an adjacent strut band.

Claims

1. A stent comprising:

a plurality of strut bands, each strut band forming a closed path of alternating peaks and troughs, wherein strut bands adjacent to one another are connected by a plurality of connectors,

each strut band comprising a plurality of long struts, a plurality of short struts, and a plurality of junctions, each junction being positioned between and connecting a first short strut and a second short strut, each long strut being connected to a first short strut at a peak and each long strut being connected to a second short strut at a trough,

each junction defining only a single junction reservoir, each junction reservoir having a junction reservoir area, all of the junction reservoirs of a strut band being circumferentially aligned,

each connector comprising a first arm which extends from a junction on one strut band, and a second arm which extends from a junction on an adjacent strut band, at least a portion of the first arm comprising a first U-shaped link and at least a portion of the second arm comprising a second U-shaped link, each first U-shaped link opening in a first direction and each second U-shaped link opening in a second direction substantially opposite the first direction, at least a portion of the first U-shaped link and at least a portion of the second U-shaped link having a shared portion, the shared portion disposed between one of the peaks on one strut band and a longitudinally adjacent trough of an adjacent strut band, the shared portion defining a single connector reservoir, each connector reservoir having a connector reservoir area, the connector reservoir area being greater than the junction reservoir area.

2. The stent of claim 1 wherein each first short strut is longitudinally and circumferentially offset from each second short strut.

3. The stent of claim 1 wherein each long strut defines at least one strut reservoir.

4. The stent of claim 3 wherein in each strut band, the at least one strut reservoir is in substantial circumferential alignment with the junction reservoirs.

5. The stent of claim 3 wherein each long strut defines a plurality of strut reservoirs, wherein at least one of the plurality of strut reservoirs is substantially circumferentially aligned with the junction reservoirs.

6. The stent of claim 5, wherein each of the plurality of strut reservoirs are spaced substantially equidistantly from one another along a length of the long strut.

7. The stent of claim 6 wherein each long strut defines between at least three strut reservoirs to nine strut reservoirs.

8. The stent of claim 1 wherein each long strut has a long strut width, and each short strut has a short strut width, the long strut width being greater than the short strut width.

9. The stent of claim 1 wherein each long strut has a long strut width, each short strut has a short strut width, and each arm has an arm width, the arm width being less than either the long strut width or the short strut width.

10. The stent of claim 1 wherein the shared portion of circumferentially adjacent connectors are substantially circumferentially aligned.

11. The stent of claim 1 wherein at least a portion of the first U-shaped link defines at least one connector reservoir and at least a portion of the second U-shaped link defines at least one connector reservoir.

12. The stent of claim 11 wherein each connector reservoir has a connector reservoir area, each junction reservoir having a junction reservoir area, the connector reservoir area being no greater than the junction reservoir area.

13. The stent of claim 12 wherein a region of the first U-shaped link adjacent to the shared portion defines a first connector reservoir, and a region of the second U-shaped link defines a second connector reservoir.

14. The stent of claim 13 wherein the first U-shaped link and the second U-shaped link each define a first plurality of connector reservoirs, and

the region of the first arm adjacent the first U-shaped link and the region of the second arm adjacent the second U-shaped link each define a second plurality of connector reservoirs,

wherein the first plurality is greater than the second plurality.