Stent configurations

• US 20020151962A1
• Filed: 05/31/2002
• Published: 10/17/2002
• Est. Priority Date: 10/09/1997
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Kveen, Graig L., Brown, Brian J., Friesen, David L., Ehr, Timothy G.J., Ley, Timothy J.
• Granted Patent: US 7,335,225 B2
• Time in Patent Office: Days
• 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 2002/91508 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 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/9155 Adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91566 connected trough to trough

Abstract

Improved stent configurations exhibiting limited recoil, resistance to compression and improved longitudinal flexibility.

Claims

1. A stent of generally cylindrical shape and having a longitudinal axis comprising interconnected cylindrical bands of separate regularly arranged curvilinear bodies, the curvilinear bodies providing individual closed expansion cells, the cells having relatively wide end portions joined by a relatively narrow center portion and being arranged end to end longitudinally with respect to the longitudinal axis of the stent, the curvilinear bodies being interconnected by one or more interconnecting elements which extend from one curvilinear body to another.

2. The stent of claim 1 in an expanded state

3. The stent of claim 1 in the unexpanded state.

4. The stent of claim 1 wherein the curvilinear bodies are also arranged in longitudinal rows with respect to the longitudinal axis of the stent.

5. The stent of claim 4 wherein the longitudinal rows of curvilinear bodies are substantially parallel.

6. The stent of claim 4 wherein the rows of cells are substantially parallel and the cells are in alignment circumferentially.

7. The stent of claim 1 wherein cylindrical bands are interconnected by interconnecting elements which extend from like sides of adjacent curvilinear bodies in adjacent bands.

8. The stent of claim 1 wherein adjacent cylindrical bands are interconnected by interconnecting elements which extend from opposite sides of the curvilinear bodies in adjacent bands.

9. The stent of claim 1 wherein the interconnecting elements are rotationally interconnected to the curvilinear bodies.

10. A stent of generally cylindrical shape and having a longitudinal axis comprising interconnected cylindrical bands of separate regularly arranged curvilinear bodies, the curvilinear bodies providing individual closed expansion cells, the cells having relatively wide end portions joined by a relatively narrow center portion and being arranged end to end longitudinally with respect to the longitudinal axis of the stent, the curvilinear bodies being interconnected by one or more rotational elements which extend from one curvilinear body to another, each rotational element having a first end and a second end, which are capable of rotating.

11. The stent of claim 10 wherein the rotational elements interconnect adjacent curvilinear bodies oriented longitudinally and circumferentially relative to each other.

13. The stent of claim 12 wherein each end portion of the closed expansion cells has a top and a bottom, the rotational elements extending between adjacent cell end portions interconnecting the top of one cell end to the bottom of another.

14. The stent of claim 13 wherein the bodies are also arranged end to end in substantially parallel longitudinal rows.

12. A stent of generally cylindrical shape and having a longitudinal axis comprising:

a plurality of curvilinear bodies providing closed expansion cells, the cells being formed of relatively wide end portions and narrow center portions and being arranged end to end longitudinally along the longitudinal axis of the stent;

rotational interconnecting elements interconnecting the end portions of adjacent cells, each rotational element having a first end and a second end, which are capable of rotating;

circumferentially extending members extending between cells of adjacent rows and interconnecting the cells at the narrow portions.