Stent

• US 6,132,460 A
• Filed: 03/27/1998
• Issued: 10/17/2000
• Est. Priority Date: 03/27/1998
• Status: Expired due to Term

• Current Assignee: Ev3 Peripheral Inc. (Medtronic Plc)
• Original Assignee: Intratherapeutics Incorporated (Sulzer Medica)
• Inventors: Thompson, Paul J.
• Primary Examiner(s): Milano, Michael J.
• Application Number:
  US09/049,486
• Time in Patent Office: 935 Days
• Field of Search: 623/1, 623/11, 623/12, 623/1.15
• 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 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak

Abstract

The present disclosure relates to an intraluminal stent including a reticulated tube having an un-deployed diameter and expandable to an enlarged diameter. When the tube is at the un-deployed diameter, the tube has cell-defining portions with opposing surfaces defining an open cell bounded by the cell-defining portions. The cell has a major axis and a minor axis. The cell-defining portions include first and second longitudinal segments each having a longitudinal axis extending parallel to and positioned on opposite sides of the cell major axis. The longitudinal segments have an undulating pattern to define a plurality of peaks and valleys spaced outwardly and inwardly, respectively, from the longitudinal axes. The first and second longitudinal segments are interconnected at opposite ends.

Claims

1. A stent comprising:

a stent body expandable between an un-deployed orientation and a deployed orientation;

the stent body having cell defining portions with opposing surfaces defining an open cell bounded by the cell defining portions, the cell having a major axis and a minor axis;

the cell defining portions including first and second longitudinal segments each of which includes;

a. a longitudinal axis extending parallel to the cell major axis, the longitudinal axes being positioned on opposite sides of the cell major axis; and

b. an undulating pattern that defines a plurality of peaks and valleys spaced outwardly and inwardly, respectively, from the longitudinal axes;

the first and second longitudinal segments being interconnected at opposite ends thereof;

the stent body further including first and second longitudinal connection locations at interconnection points of the interconnected first and second longitudinal segments for connection of the cell to first and second longitudinally adjacent cells, respectively, and first and second transverse connection locations on the first and second longitudinal segments, respectively, for connection of the cell to first and second transversely adjacent cells, respectively;

the cell defining portions being symmetrical about both the major axis and the minor axis;

the first and second longitudinal connection locations being positioned on the major axis, and the first and second transverse connection locations being positioned on the minor axis;

the longitudinal and transverse connection locations each having a transverse width W_c that is at most equal to as a common width W of each of the longitudinal segments; and

the longitudinal and transverse connection locations each having a longitudinal length L_c that is greater than two times as long as the common width W of each of the longitudinal segments.

2. The stent of claim 1, wherein the peaks are formed by first portions of the longitudinal segments and the valleys are formed by second portions of the longitudinal segments, and the undulating patterns of the cell include sets of substantially parallel portions that interconnect the peaks and valleys and are generally perpendicular with respect to the cell major axis.

3. The stent of claim 2, wherein the second portions of said first and second longitudinal segments are located outside the longitudinal axes when the stent body is expanded to a fully expanded orientation.

4. The stent of claim 1, wherein the stent body plastically deforms as it is expanded from the un-deployed orientation to the deployed orientation.

5. The stent of claim 2, wherein a spacing gap G is formed between each set of substantially parallel portions, and the longitudinal length L_c is generally equal to two times the common width W plus the spacing gap G.

6. The stent of claim 2, wherein at least some of the peaks and valleys are formed by semi-circular portions.

7. The stent of claim 6, wherein the semi-circular portions have cross-sectional areas that are smaller than cross-sectional areas corresponding to the substantially parallel portions.

8. The stent of claim 7, wherein the semi-circular portions include apices, and the cross-sectional areas of the semi-circular portions decrease as said semi-circular portions extend toward said apices.

9. The stent of claim 1, wherein the major axis is parallel to a stent axis of the stent body.

10. The stent of claim 1, wherein the major axis is perpendicular to a stent axis of the stent body.

11. A stent comprising:

a stent body expandable between an un-deployed orientation and a deployed orientation;

the stent body having cell defining portions with opposing surfaces defining an open cell bounded by the cell defining portions, the cell having a major axis and a minor axis;

the cell defining portions including first and second longitudinal segments each of which includes;

a. a longitudinal axis extending parallel to the cell major axis, the longitudinal axes being positioned on opposite sides of the cell major axis; and

b. an undulating pattern that defines a plurality of peaks and valleys spaced outwardly and inwardly, respectively, from the longitudinal axes, the plurality of peaks including a central peak positioned at the minor axis and longitudinally adjacent peaks positioned on opposite sides of the central peak, the undulating pattern of the cell including sets of substantially parallel portions that interconnect the peaks and valleys and are generally perpendicular with respect to the cell major axis, the sets of substantially parallel portions corresponding to the central peak being longer than the sets of substantially parallel portions corresponding to the longitudinally adjacent peaks;

the first and second longitudinal segments being interconnected at opposite ends thereof;

the stent body further including first and second longitudinal connection locations at interconnection points of the interconnected first and second longitudinal segments for connection of the cell to first and second longitudinally adjacent cells, respectively, and first and second transverse connection locations on the first and second longitudinal segments, respectively, for connection of the cell to first and second transversely adjacent cells, respectively;

the cell defining portions being symmetrical about both the major axis and the minor axis;

the first and second longitudinal connection locations being positioned on the major axis, and the first and second transverse connection locations being positioned on the minor axis; and

the transverse connection locations being formed at the central peaks of the undulating patterns, the central peaks being connected directly to central peaks of the first and second transversely adjacent cells such that no intermediate connection members are provided between the interconnected central peaks.

12. The stent of claim 11, wherein the stent body plastically deforms as it is expanded from the un-deployed orientation to the deployed orientation.

13. The stent of claim 11, wherein at least some of the peaks and valleys are formed by semi-circular portions.

14. The stent of claim 11, wherein each of the longitudinal and transverse connection locations has a transverse width W_c that is at most equal to a common width W of each of the longitudinal segments.

15. The stent of claim 11, wherein each of the longitudinal and transverse connection locations has a longitudinal length L_c that is greater than two times as long as a common width W of each of the longitudinal segments.

16. The stent of claim 15, wherein a spacing gap G is formed between each set of substantially parallel portions, and the longitudinal length L_c is generally equal to two times the common width W plus the spacing gap G.