Intravascular stent device

• US 20020193868A1
• Filed: 06/05/2002
• Published: 12/19/2002
• Est. Priority Date: 06/14/2001
• 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 6,818,013 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 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/9155 Adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91591 Locking connectors, e.g. using male-female connections
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2230/0054 V-shaped

Abstract

A very small diameter intravascular stent device which may be used to occlude or partially occlude an aneurysm in the human brain which is comprised of a thin-walled skeletal cylindrical tube formed of undulating or sinusoidal elements which, when compressed, nest tightly with each other.

Claims

1. A self-expanding stent device comprising:

a small diameter skeletal tubular member having a thin wall and having a proximal end and a distal end;

said wall of said tubular member comprised of a plurality of cells which are formed by a plurality of generally undulating members and a plurality of struts;

said undulating members are generally parallel with the longitudinal axis of said tubular member and are generally parallel to each other;

each undulating member has a plurality of peaks;

each strut has a proximal end and a distal end;

said undulating members and said struts are interconnected and have a repeating pattern in which the proximal ends of said struts are attached to the peaks of said undulating members and the distal ends of said struts are attached to the peaks of said adjacent undulating members.

2. A self-expanding stent device as defined in claim 1, in which said skeletal tubular member has a small compressed diameter for delivery within a vessel and a normally biased expanded diameter for retaining said tubular member against the walls of the vessel;

when said skeletal tubular member is compressed to its small diameter the peaks of said undulating members pull upon the proximal ends of said struts, and the distal ends of said struts pull upon the peaks of adjacent undulating members causing said cells of said tubular member to collapse and thereby causing said tubular member to attain said small diameter.

3. A self-expanding stent device as defined in claim 1, wherein said skeletal tubular member includes a proximal leg;

said proximal leg extends generally parallel to the longitudinal axis of said tubular member and is attached to the proximal end of said skeletal tubular member;

the proximal leg includes an attachment flange.

4. A self-expanding stent device as defined in claim 3, wherein said proximal leg is biased outwardly from the longitudinal axis of said skeletal tubular member.

5. A self-expanding stent device as defined in claim 3, wherein said proximal leg includes a radiopaque marker.

6. A self-expanding stent device as defined in claim 1, wherein said tubular member includes at least one distal leg;

said distal leg extends generally parallel to the longitudinal axis of said tubular member and is attached to the distal end of said skeletal tubular member.

7. A self-expanding stent device as defined in claim 6, wherein said distal leg includes a radiopaque marker.

8. A self-expanding stent device as defined in claim 2, wherein said skeletal tubular member is constructed from a nickel-titanium alloy.

9. A self-expanding stent device comprising:

a small diameter skeletal tubular member having a thin wall and having a proximal end and a distal end;

said wall of said tubular member comprised of a plurality of cells which are formed by a plurality of sinusoidal members and a plurality of struts;

said sinusoidal members are generally parallel to the longitudinal axis of said tubular member and are generally parallel to each other;

each sinusoidal member has a plurality of positive peaks and a plurality of negative peaks;

said sinusoidal members and said struts are interconnected and have a repeating pattern in which each strut connects a positive peak of each sinusoidal member with a negative peak of each adjacent sinusoidal member.

10. A self-expanding stent device as defined in claim 9, in which said skeletal tubular member has a small compressed diameter for delivery within a vessel and a normally biased expanded diameter for retaining said tubular member against the walls of a vessel;

when said skeletal tubular member is compressed to its small diameter the positive peaks of said sinusoidal members pull upon said struts, and said struts pull upon the negative peaks of adjacent sinusoidal members causing said cells of said tubular member to collapse and thereby causing said tubular member to attain said small diameter.

11. A self-expanding stent device as defined in claim 9, wherein said tubular member includes a proximal leg;

said proximal leg extends generally parallel to the longitudinal axis of said tubular member and is attached to the proximal end of said tubular member;

the proximal leg includes an attachment flange.

12. A self-expanding stent device as defined in claim 11, wherein said proximal leg is biased outwardly from the longitudinal axis of said skeletal tubular member.

13. A self-expanding stent device as defined in claim 11, wherein said proximal leg includes a radiopaque marker.

14. A self-expanding stent device as defined in claim 9, wherein said skeletal tubular member includes at least one distal leg;

said distal leg extends generally parallel to the longitudinal axis of said skeletal tubular member and is attached to the distal end of said tubular member.

15. A self-expanding stent device as defined in claim 14, wherein said distal leg includes a radiopaque marker.

16. A self-expanding stent device as defined in claim 10, wherein said skeletal tubular member is constructed from a nickel-titanium alloy.

18. A self-expanding aneurysm cover as defined in claim 17, in which said skeletal tubular member has a small compressed diameter for delivery within a vessel and a normally biased expanded diameter for retaining said tubular member against the walls of a vessel;

when said skeletal tubular member is compressed to its small diameter the peaks of said undulating members pull upon the proximal ends of said struts, and the distal ends of said struts pull upon the peaks of adjacent undulating members causing said cells of said tubular member to collapse and thereby causing said tubular member to attain said small diameter.

19. A self-expanding aneurysm cover as defined in claim 17, wherein said skeletal tubular member includes at least two proximal legs;

said proximal legs extend generally parallel to the longitudinal axis of said tubular member and are attached to the proximal end of said skeletal tubular member;

at least one proximal leg includes a T-shaped attachment flange.

20. A self-expanding aneurysm cover as defined in claim 19, wherein said proximal legs are biased outwardly from the longitudinal axis of said skeletal tubular member.

21. A self-expanding aneurysm cover as defined in claim 19, wherein said proximal legs include a radiopaque marker.

22. A self-expanding aneurysm cover as defined in claim 17, wherein said tubular member includes at least one distal leg;

said distal leg extends generally parallel to the longitudinal axis of said tubular member and is attached to the distal end of said skeletal tubular member.

23. A self-expanding aneurysm cover as defined in claim 22, wherein said distal leg includes a radiopaque marker.

24. A self-expanding aneurysm cover as defined in claim 18, wherein said skeletal tubular member is constructed from a nickel-titanium alloy.

17. A self-expanding aneurysm cover comprising:

a small diameter skeletal tubular member having a thin wall and having a proximal end and a distal end;

said wall of said tubular member comprised of a plurality of cells which are formed by a plurality of generally undulating members and a plurality of struts;

said undulating members are generally parallel with the longitudinal axis of said tubular member and are generally parallel to each other;

each undulating member has a plurality of peaks;

each strut has a proximal end and a distal end;

said undulating members and said struts are interconnected and have a repeating pattern in which the proximal ends of said struts are attached to the peaks of said undulating members and the distal ends of said struts are attached to the peaks of said adjacent undulating members.