Helical stent design

• US 8,221,490 B2
• Filed: 01/21/2010
• Issued: 07/17/2012
• Est. Priority Date: 10/23/1998
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Keeen, Graig L., Doran, Burns P., Judnitch, Robert T.
• Primary Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US12/691,469
• Publication Number:
  US 20100121430A1
• Time in Patent Office: 908 Days
• Field of Search: 623/1.15, 623/1.12, 623/1.16, 623/1.17, 623/1.2, 606191-198
• US Class Current: 623/1.15
• 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 2/91 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 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak

Abstract

An expandable tubular reinforcing member used for body lumens such as blood vessels, the reinforcing member being formed of a continuous elongated helical element comprised of spaced undulating portions forming end loop portions and including a plurality of curvilinear connector elements extending between and interconnecting at least some of the adjacent undulating portions of the helical element over its length.

Claims

1. A stent, the stent having a first helical element arranged in a plurality of adjacent spirals and a plurality of connectors, the first helical element defining a plurality of rectangular cells, the plurality of connectors engaging the plurality of adjacent spirals of the first helical element.

2. The stent of claim 1, the rectangular cells being oriented parallel to a longitudinal axis of the stent.

3. The stent of claim 1, the rectangular cells being oriented at an angle to a longitudinal axis of the stent.

4. The stent of claim 1, further comprising a second helical element, the second helical element comprising a plurality of interconnected loop portions.

5. The stent of claim 4, further comprising a plurality of connecting elements, the connecting elements engaging the first helical element to the second helical element.

6. The stent of claim 5, the second helical element forming an end of the stent.

7. The stent of claim 5, each of the plurality of connecting elements having a sinusoidal shape.

8. The stent of claim 1, each connector being curvilinear.

9. A helical stent comprising interconnected rectangular cells arranged along a helical band and connecting elements engaging adjacent spirals of the helical band.

10. The helical stent of claim 9, wherein each connecting element includes at least two bends.

11. The helical stent of claim 10, wherein the bends open in substantially opposite directions.

12. The helical stent of claim 9, each rectangular cell being oriented parallel to a longitudinal axis of the helical stent.

13. The helical stent of claim 9, each rectangular cell being oriented at an angle to a longitudinal axis of the helical stent.

14. The stent of claim 9, each connecting element being curvilinear.