Z-STENT WITH INCORPORATED BARBS

• US 20090171442A1
• Filed: 12/23/2008
• Published: 07/02/2009
• Est. Priority Date: 12/27/2007
• Status: Active Grant

• Current Assignee: Cook Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Incorporated (Cook Group Incorporated)
• Inventors: Dixon, Christopher G., Young, Ronan T.
• Granted Patent: US 7,905,915 B2
• Time in Patent Office: Days
• US Class Current: 623/1.150
• CPC Class Codes: A61F 2/06 Blood vessels
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

A stent constructed from at least two individual monolithic stent units is provided. The stent includes at least two individual stent units. Each individual stent unit has, as a monolithic structure, a first strut, a second strut, and a third strut. A first apex adjoins the first and second struts, and a second apex adjoining the second and third struts, where the second apex is disposed in a direction generally opposite the first apex. The monolithic stent unit includes an attachment mechanism at the end of at least the first strut. The first strut of each monolithic stent unit is joined at an attachment point to the third strut of an adjacent monolithic stent unit. The attachment mechanism is bent to form an angle relative to the attachment point. A method of manufacturing the same stent also is provided.

Claims

1. A stent, comprising:

at least two individual stent units,

each stent unit comprising, as a monolithic structure;

a first strut,

a second strut,

and a third strut,

a first apex adjoining the first and second struts,

a second apex adjoining the second and third struts, where the second apex is disposed in a direction generally opposite the first apex; and

an attachment mechanism at an end of at least the first strut; and

where the first strut of each monolithic stent unit is joined at an attachment point to the third strut of an adjacent monolithic stent unit; and

where the attachment mechanism is bent to form an angle relative to the attachment point.

2. The stent of claim 1, where the third strut of the monolithic stent unit comprises a coiled attachment point.

3. The stent of claim 2, where each attachment mechanism of each monolithic stent unit is passed through an end of the coil lumen of an adjacent monolithic stent unit to join with an adjacent monolithic stent unit, such that the attachment mechanism of the first monolithic stent unit is passed through the coil lumen of the last monolithic stent unit to form an annular stent;

and

where each attachment mechanism exits from the coil at the other end of the coil lumen and is bent to form an angle relative to the longitudinal axis of the coil.

4. The stent of claim 2, where the coil of the monolithic stent unit is disposed substantially equidistant between the second apex and an end of the third strut.

5. The stent of claim 1, where the monolithic stent unit further comprises an attachment mechanism at an end of the third strut.

6. The stent of claim 1, where the first strut of each individual monolithic stent unit is directly interconnected with the third strut of an adjacent individual monolithic stent unit.

7. The stent of claim 6, where the first strut of each individual monolithic stent unit and the third strut of an adjacent individual monolithic stent unit are interconnected by laser welding, brazing, soldering, or ultrasonic welding.

8. The stent of claim 1, where the diameter of each individual monolithic stent unit ranges from about 0.014″

to about 0.022″

.

9. The stent of claim 1, where the amount of individual monolithic stent units in the stent ranges from about 10 individual monolithic stent units to 18 individual monolithic stent units.

10. The stent of claim 1 comprising at least two or more of the following:

where the third strut of the monolithic stent unit comprises a coiled attachment point;

where the third strut of the monolithic stent unit comprises a coiled attachment point, and where each attachment mechanism of each monolithic stent unit is passed through an end of the coil lumen of an adjacent monolithic stent unit to join with an adjacent monolithic stent unit, such that the attachment mechanism of the first monolithic stent unit is passed through the coil lumen of the last monolithic stent unit to form an annular stent, exits from the coil at the other end of the coil lumen, and is bent to form an angle relative to the longitudinal axis of the coil;

where the third strut of the monolithic stent unit comprises a coiled attachment point disposed substantially equidistant between the second apex and an end of the third strut;

where the monolithic stent unit structure comprising an attachment mechanism at an end of the third strut;

where the first strut of each individual monolithic stent unit is directly interconnected with the third strut of an adjacent individual monolithic stent unit;

where the first strut of each individual monolithic stent unit and the third strut of an adjacent individual monolithic stent unit are interconnected by laser welding, brazing, soldering, or ultrasonic welding;

where the amount of individual monolithic stent units in the stent ranges from about 10 individual monolithic stent units to 18 individual monolithic stent units;

or

where the diameter of each individual monolithic stent unit ranges from about 0.014″

to about 0.022″

.

11. A stent, comprising:

a series of at least two individual stent units including a first stent unit and a last stent unit in the series of stent units, each stent unit comprising as a monolithic structure;

a first strut,

a second strut,

and a third strut,

a first apex adjoining the first and second struts,

a second apex adjoining the second and third struts, where the second apex is disposed in a direction generally opposite the first apex; and

an attachment mechanism at an end of the first strut;

where the first strut of each monolithic stent unit is joined at an attachment point to the third strut of an adjacent monolithic stent unit.

12. The stent of claim 11, where the first strut of each individual monolithic stent unit and the third strut of an adjacent individual monolithic stent unit are interconnected by laser welding, brazing, soldering, or ultrasonic welding.

13. The stent of claim 11, where third strut comprises a coiled the attachment point, and each attachment mechanism of each monolithic stent unit is passed through an end of the coil lumen of an adjacent monolithic stent unit to join with an adjacent monolithic stent unit, such that the attachment mechanism of the first monolithic stent unit is passed through the coil lumen of the last monolithic stent unit to form an annular stent;

and

where each attachment mechanism exits from the coil at the other end of the coil lumen and is bent to form an angle relative to the longitudinal axis of the coil.

14. The stent of claim 13, where the coil of the monolithic stent unit is disposed substantially equidistant between the second apex and an end of the third strut.

15. The stent of claim 11, where the monolithic stent unit further comprises an attachment mechanism at an end of the third strut.

16. A method of forming a stent from a series of separate and individual monolithic stent units comprising:

providing at least two individual monolithic stent units;

bending each of the monolithic stent units to form a configuration having three struts, a first strut, a second strut, and a third strut, where a first apex adjoins the first and second struts and a second apex adjoins the second and third struts, where the second apex is disposed in a direction generally opposite the first apex;

attaching a portion of the first strut of each monolithic stent unit to the third strut of an adjacent monolithic stent unit to join with the adjacent monolithic stent unit to form an attachment mechanism;

bending each attachment mechanism to form an angle relative to the longitudinal axis of the second strut.

17. The method of claim 16, further comprising forming a coil into the third strut.

18. The method of claim 17, further comprising inserting a portion of the first strut of each individual monolithic stent unit through the coil lumen of an adjacent monolithic stent unit to join with the adjacent monolithic stent unit to form an attachment mechanism.

19. The method of claim 18, further comprising bending each attachment mechanism to form an angle relative to the longitudinal axis of the coil.

20. The method of claim 16, further comprising interconnecting the first strut of each individual monolithic stent unit and the third strut of an adjacent individual monolithic stent unit by laser welding, brazing, soldering, or ultrasonic welding.