Stent configurations

• US 6,013,091 A
• Filed: 10/09/1997
• Issued: 01/11/2000
• Est. Priority Date: 10/09/1997
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Ehr, Timothy G. J., Kveen, Graig L., Brown, Brian J., Friesen, David L., Ley, Timothy J.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): TRUONG, KEVIN THAO
• Application Number:
  US08/947,620
• Time in Patent Office: 824 Days
• Field of Search: 606/191, 606/195, 606/198, 606/108, 623/1, 623/12
• US Class Current: 623/1.16
• 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 comprised of a plurality of regularly arranged interconnected curvilinear bodies of same shape 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 in longitudinal rows with respect to the longitudinal axis of the stent, the cells being interconnected only by connection members.

2. The stent of claim 1 wherein the curvilinear bodies are also arranged in substantially parallel longitudinal rows end to end and which provide for individual closed expansion cells and which further include:

a plurality of longitudinal extending elongate support members, one of which is positioned between each of the longitudinal rows of cells, and

a plurality of circumferentially extending connecting members substantially normal to the support members and interconnecting them to the narrow center portions of the cells.

3. The stent of claim 1 wherein the rows of cells are substantially parallel and the cells are in alignment circumferentially.

4. The stent of claim 3 wherein the cells are staggered circumferentially.

5. The stent of claim 1 wherein the relatively wide end dimensions are further characterized as being substantially identical to each other.

6. The stent of claim 1 wherein the cells are symmetrical in overall shape.

7. A stent of generally cylindrical shape comprising:

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

paired longitudinal connecting members connecting the ends of adjacent cells, and

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

8. The stent of claim 7 wherein the bodies are also arranged in substantially parallel longitudinal rows end to end.

9. A stent of generally cylindrical shape and having a longitudinal axis and a circumference, comprised of a plurality of regularly arranged interconnected curvilinear bodies of same shape providing individual closed expansion cells, the cells having relatively wide end portions joined by a relatively narrow center portion some of which are arranged end to end, longitudinally in longitudinal rows with respect to the longitudinal axis of the stent, and some of which are arranged circumferentially in circumferential rows with respect to the circumference of the stent.

10. A stent of generally cylindrical shape and having a longitudinal axis comprised of a plurality of bands which are made up of a plurality of regularly arranged interconnected curvilinear bodies of same shape providing closed expansion cells, the cells having relatively wide end portions joined by a relatively narrow center portion and being arranged end to end, longitudinally in longitudinal rows with respect to the longitudinal axis of the stent, the bands being interconnected by the curvilinear bodies shared between certain expansion cells located on adjacent edges of the bands, the certain cells being less than the number of cells which make up the band edges.