Bifurcated stent

• US 20070208418A1
• Filed: 03/06/2006
• Published: 09/06/2007
• Est. Priority Date: 03/06/2006
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Meyer, Michael, Hegg, Jens
• Granted Patent: US 7,833,264 B2
• Time in Patent Office: Days
• US Class Current: 623/1.350
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• 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

Abstract

A stent, with expanded and unexpanded configurations, comprises a substantially tubular body having a proximal end region, a distal end region, and defining a first lumen therethrough. The tubular body comprises a plurality of adjacent deployable elements positioned between the proximal end region and distal end region. In the expanded configuration the deployable elements define a second lumen. The first lumen has a first longitudinal axis and the second lumen has a second longitudinal axis which is at an oblique angle relative to the first longitudinal axis. The first lumen is in fluid communication with the second lumen. The tubular body comprises a track region which further comprises at least two struts. The struts are substantially parallel to each other and the first longitudinal axis in the unexpanded configuration. The track region is comprised of at least one of the deployable elements.

Claims

1. A stent for placement at a vessel bifurcation, the stent having an expanded configuration and an unexpanded configuration, the stent comprising:

a substantially tubular body comprised of a plurality of interconnected struts and defining a circumferential plane, the tubular body having a proximal end region, a distal end region, and defining a first lumen therethrough, the first lumen having a first longitudinal axis, the tubular body comprising a plurality of adjacent deployable elements positioned between the proximal end region and distal end region, in the expanded configuration the deployable elements defining a second lumen, the second lumen having a second longitudinal axis, the second longitudinal axis being at an oblique angle relative to the first longitudinal axis, the first lumen being in fluid communication with the second lumen;

the substantially tubular body comprising a track region, the track region comprising at least two struts which are substantially parallel to each other and the first longitudinal axis in the unexpanded configuration, the track region comprised of at least one of the deployable elements.

2. The stent of claim 1 wherein the tubular body further comprises plurality of connectors, the track region having at least one connector, the at least one connector engaged to at least one of the adjacent deployable elements.

3. The stent of claim 2 wherein the at least one connector is substantially curvilinear.

4. The stent of claim 1 wherein the track region further comprises at least one connector engaged between the at least two struts.

5. The stent of claim 4 wherein the at least one connector is substantially curvilinear.

6. The stent of claim 1 wherein the track region further comprises a plurality of connectors, the adjacent deployable elements being engaged to each other by at least one connector.

7. The stent of claim 6 wherein the plurality of connectors define a substantially planar circumferential region about the second longitudinal axis.

8. A stent for placement at a vessel bifurcation, the stent having an expanded configuration and an unexpanded configuration, the stent comprising:

a substantially tubular body defining a circumferential plane, the tubular body having a proximal end region, a distal end region, and defining a first lumen therethrough, the first lumen having a first longitudinal axis, the tubular body comprising a plurality of adjacent deployable elements, in the expanded configuration the deployable elements defining a second lumen, the second lumen having a second longitudinal axis, the second longitudinal axis being at an oblique angle relative to the first longitudinal axis, the first lumen being in fluid communication with the second lumen,

each deployable element consists of at least one curved stent member, the adjacent curved stent members defining a plurality of cells, in the expanded configuration each cell extending at an oblique angle relative to the second longitudinal axis.

9. The stent of claim 8 wherein in the expanded configuration the second lumen defines a substantially frusto-conical region.

10. The stent of claim 9 wherein the frusto-conical region has a first end region, a second end region, and a middle region therebetween, the first end region being defined by base cells, the second end region being defined by top cells, the middle region being defined by middle cells, each base cell having a greater area than the each middle cell, each middle cell having a greater area than each top cell.