Intravascular stent device

• US 20030216807A1
• Filed: 04/29/2003
• Published: 11/20/2003
• Est. Priority Date: 05/16/2002
• Status: Active Grant

• Current Assignee: Codman & Shurtleff Incorporated (Johnson & Johnson)
• Original Assignee: Cordis Neurovascular, Inc. (Johnson & Johnson)
• Inventors: Mitelberg, Vladimir, Jones, Donald K.
• Granted Patent: US 7,195,648 B2
• Time in Patent Office: Days
• US Class Current: 623/1.22
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 2017/1205 Introduction devices
• 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 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/823 Stents, different from stent-grafts, adapted to cover an aneurysm
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/9534 for repositioning of stents
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

Disclosed is a very small diameter intravascular stent, or aneurysm cover, which may be used to occlude, or partially occlude, an aneurysm in the human brain. The stent is comprised of a thin-walled skeletal tubular member formed of interconnected sinusoidal members to thereby form a pattern of cells along the skeletal tubular member. The stent also includes anchor members, which are comprised of a longitudinal leg member having a radiopaque coil disposed about the leg member, which serve to retain the stent during delivery of the stent.

Claims

1. A self-expanding stent comprising:

a small diameter skeletal tubular member having a thin wall and a longitudinal axis;

said wall of said skeletal tubular member includes a plurality of cells which are formed by a plurality of interconnected sinusoidal members, said plurality of sinusoidal members are generally parallel to the longitudinal axis of said skeletal tubular member and are generally parallel to each other, and each of said plurality of sinusoidal members has a plurality of positive and negative peaks; and

,

the positive peaks of said sinusoidal members are connected to the negative peaks of adjacent sinusoidal members so as to form a repeating pattern of cells along the skeletal tubular member.

2. A self-expanding stent as defined in claim 1, wherein a junction is formed at a distal end of the skeletal tubular member where a positive peak of one of said sinusoidal members is connected to a negative peak of an adjacent one of said sinusoidal members, a longitudinal leg member extends from said junction in a direction parallel to the longitudinal axis of the skeletal tubular member, and a helically wound coil is disposed about said longitudinal leg member.

3. A self-expanding stent as defined in claim 1, wherein a plurality of junctions are formed at a distal end of the skeletal tubular member where the positive peaks of the sinusoidal members are connected to the negative peaks of adjacent sinusoidal members, two longitudinal leg members each of which extend from one of said plurality of junctions, said longitudinal leg members extend in a direction parallel to the longitudinal axis of the skeletal tubular member, and a helically wound coil is disposed about each of said longitudinal leg members.

4. A self-expanding stent as defined in claim 1, wherein a plurality of junctions are formed at a distal end of the skeletal tubular member where the positive peaks of the sinusoidal members are connected to the negative peaks of adjacent sinusoidal members, four longitudinal leg members each of which extend from one of said plurality of junctions, said longitudinal leg members extend in a direction parallel to the longitudinal axis of the skeletal tubular member, and a helically wound coil is disposed about each of said longitudinal leg members.

5. A self-expanding stent as defined in claim 4, wherein each helically wound coil is formed of a radiopaque material.

6. A self-expanding stent as defined in claim 1, wherein a junction is formed at a proximal end of the skeletal tubular member where a positive peak of one of said sinusoidal members is connected to a negative peak of an adjacent one of said sinusoidal members, a longitudinal leg member extends from said junction in a direction parallel to the longitudinal axis of the skeletal tubular member, and a helically wound coil is disposed about said longitudinal leg member.

7. A self-expanding stent as defined in claim 1, wherein a plurality of junctions are formed at a proximal end of the skeletal tubular member where the positive peaks of the sinusoidal members are connected to the negative peaks of adjacent sinusoidal members, two longitudinal leg members extend from one of said plurality of junctions, said longitudinal leg members extending in a direction parallel to the longitudinal axis of the skeletal tubular member, and a helically wound coil is disposed about each of said longitudinal leg members.

8. A self-expanding stent as defined in claim 7, wherein each helically wound coil is formed of a radiopaque material.

9. A self-expanding stent as defined in claim 1, wherein said skeletal tubular member includes distal and proximal ends, and wherein a plurality of junctions are formed at both the distal and proximal ends of the skeletal tubular member where positive peaks of sinusoidal members are connected to negative peaks of adjacent sinusoidal members, a plurality of longitudinal leg members each extend from each of said plurality of junctions, said longitudinal leg members extending in a direction parallel to the longitudinal axis of the skeletal tubular member, and a helically wound coil is disposed about each of said longitudinal leg members.

10. A self-expanding stent as defined in claim 1, wherein said skeletal tubular member includes distal and proximal ends, and wherein a plurality of junctions are formed at both the distal and proximal ends of the skeletal tubular member where positive peaks of sinusoidal members are connected to negative peaks of adjacent sinusoidal members, four longitudinal leg members each extend from one of said plurality of junctions at the distal end of the skeletal tubular member and two longitudinal leg members each of which extend from one of said plurality of junctions at the proximal end of the skeletal tubular member, said longitudinal leg members extend in a direction parallel to the longitudinal axis of the skeletal tubular member, and a helically wound coil is disposed about each of said longitudinal leg members.

11. A self-expanding stent as defined in claim 10, wherein each helically wound coil is formed of a radiopaque material.

12. A self-expanding stent comprising:

a small diameter skeletal tubular member having distal and proximal ends, a thin wall and a longitudinal axis, said wall of said skeletal tubular member includes a plurality of cells which are formed by a plurality of interconnected sinusoidal members, said plurality of sinusoidal members are generally parallel to the longitudinal axis of said skeletal tubular member and are generally parallel to each other, each of said plurality of sinusoidal members has a plurality of positive and negative peaks, said positive peaks of said sinusoidal members are directly connected to negative peaks of adjacent sinusoidal members so as to form a repeating pattern of cells along a length of said skeletal tubular member; and

,

a plurality of junctions are formed at both the distal and proximal ends of the skeletal tubular member where the positive peaks of the sinusoidal members are directly connected to the negative peaks of adjacent sinusoidal members, four longitudinal leg members each of which extend from one of said plurality of junctions at the distal end of the skeletal tubular member and from two longitudinal leg members each of which extend from one of said plurality of junctions at the proximal end of the skeletal tubular member, said leg members extending in a direction parallel to the longitudinal axis of the skeletal tubular member, and a helically wound radiopaque coil is disposed about each of said longitudinal leg members.

13. An aneurysm cover comprising:

a small diameter skeletal tubular member having a thin wall and a longitudinal axis;

said wall of said skeletal tubular member includes a plurality of cells which are formed by a plurality of interconnected sinusoidal members, said plurality of sinusoidal members are generally parallel to the longitudinal axis of said skeletal tubular member and are generally parallel to each other, and each of said plurality of sinusoidal members has a plurality of positive and negative peaks; and

,

the positive peaks of each sinusoidal member are connected to the negative peaks of an adjacent sinusoidal member so as to form a repeating pattern of cells along the skeletal tubular member.

14. An aneurysm cover comprising:

a small diameter skeletal tubular member having distal and proximal ends, a thin wall and a longitudinal axis, said wall of said skeletal tubular member includes a plurality of cells which are formed by a plurality of interconnected sinusoidal members, said plurality of sinusoidal members are generally parallel to the longitudinal axis of said skeletal tubular member and are generally parallel to each other, each of said plurality of sinusoidal members has a plurality of positive and negative peaks, said positive peaks of said sinusoidal members are directly connected to the negative peaks of adjacent sinusoidal members so as to form a repeating pattern of cells along a length of said skeletal tubular member; and

,

a plurality of junctions are formed at both the distal and proximal ends of the skeletal tubular member where the positive peaks of the sinusoidal members are directly connected to the negative peaks of adjacent sinusoidal members, four longitudinal leg members each of which extend from one of said plurality of junctions at the distal end of the skeletal tubular member and from two longitudinal leg members each of which extend from one of said plurality of junctions at the proximal end of the skeletal tubular member, said leg members extending in a direction parallel to the longitudinal axis of the skeletal tubular member, and a helically wound radiopaque coil is disposed about each of said longitudinal leg members.