Delivery System for Stent-Graft With Anchoring Pins

• US 20080114442A1
• Filed: 11/14/2006
• Published: 05/15/2008
• Est. Priority Date: 11/14/2006
• Status: Active Grant

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Murray, Robert, Yang, Frank, Greenan, Trevor, Rust, Matthew, Muzslay, Heath, Mitchell, James
• Granted Patent: US 8,052,732 B2
• Time in Patent Office: Days
• US Class Current: 623/1.13
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2230/0054 V-shaped

Abstract

A delivery system for an endoprosthesis includes a spindle having a spindle body and spindle pins extending radially outward from the spindle body. The delivery system further comprises a tip comprising a sleeve, the spindle pins extending from the spindle body toward the sleeve. The endoprosthesis includes a proximal anchor stent ring having spindle pin catches and anchor pins. The spindle pins of the spindle extend into the spindle pin catches and the sleeve radially constrains the anchor pins.

Claims

1. A delivery system comprising:

a spindle comprising;

a spindle body; and

spindle pins extending radially outward from said spindle body;

a tip comprising a sleeve, said spindle pins extending from said spindle body toward said sleeve; and

an endoprosthesis comprising spindle pin catches and anchor pins, said spindle pins extending into said spindle pin catches, said sleeve radially constraining said anchor pins.

2. The delivery system of claim 1 wherein said tip comprises a lumen.

3. The delivery system of claim 2 further comprising an inner tube comprising a lumen, said tip being mounted on said inner tube, said lumen of said inner tube being in fluid communication with said lumen of said tip.

4. The delivery system of claim 1 wherein said tip further comprises a tapered outer surface.

5. The delivery system of claim 4 wherein said tip further comprises a primary sheath abutment surface, said tapered outer surface extending proximally to said primary sheath abutment surface.

6. The delivery system of claim 5 wherein said primary sheath abutment surface comprises an annular ring perpendicular to a longitudinal axis of said delivery system.

7. The delivery system of claim 5 wherein said sleeve extends proximally from said primary sheath abutment surface.

8. The delivery system of claim 1 wherein said sleeve comprises a cylindrical outer surface and a cylindrical inner surface, said spindle body comprising a cylindrical outer surface.

9. The delivery system of claim 8 wherein a diameter to which said spindle pins extend from said cylindrical outer surface of said spindle body is approximately equal to or slightly less than a diameter of said inner cylindrical surface of said sleeve.

10. The delivery system of claim 8 wherein an annular space exists between said spindle body and said inner cylindrical surface of said sleeve.

11. The delivery system of claim 10 wherein said endoprosthesis further comprises a proximal anchor stent ring in said annular space.

12. The delivery system of claim 1 further comprising:

an outer tube, said spindle being mounted to said outer tube; and

an inner tube within and extending through said outer tube and said spindle, said tip being mounted on said inner tube, said inner tube and tip capable of being longitudinally moved relative to said outer tube and said spindle.

13. The delivery system of claim 12 further comprising a handle comprising an inner tube actuation member for advancing said inner tube relative to said outer tube.

14. The delivery system of claim 12 further comprising a primary sheath over said outer tube and around said sleeve, said primary sheath capable of being longitudinally moved relative to said outer tube and said spindle.

15. The delivery system of claim 14 further comprising a handle comprising a primary sheath actuation member for retracting said primary sheath relative to said outer tube.

16. The delivery system of claim 14 wherein said primary sheath radially compresses said endoprosthesis.

17. The delivery system of claim 1 wherein said endoprosthesis comprises a proximal anchor stent ring comprising:

proximal apexes;

distal apexes;

struts extending between said proximal apexes and said distal apexes; and

a pair of said anchor pins located on said struts adjacent each of said proximal apexes, said proximal apexes and said anchor pins defining said spindle pin catches.

18. The delivery system of claim 17 wherein said anchor pins comprise distal tips uncovered by said sleeve.

19. The delivery system of claim 18 wherein said distal tips are sharp points.

20. A delivery system comprising:

a spindle comprising;

a spindle body; and

spindle pins extending radially outward from said spindle body;

a tip comprising a sleeve, said spindle pins extending from said spindle body toward said sleeve; and

an endoprosthesis comprising;

a graft material;

a proximal anchor stent ring attached to said graft material, said proximal anchor stent ring comprising;

proximal apexes;

distal apexes;

struts extending between said proximal apexes and said distal apexes; and

a pair of anchor pins located on said struts adjacent each of said proximal apexes, said proximal apexes and said anchor pins defining spindle pin catches, said spindle pins extending into said spindle pin catches, said sleeve radially constraining said anchor pins.

21. A method of deploying an endoprosthesis comprising:

radially constraining a proximal portion of a proximal anchor stent ring of said endoprosthesis in an annular space between a sleeve of a tip and a spindle, said spindle comprising spindle pins extending into spindle pin catches of said proximal anchor stent ring, said spindle pin catches being defined by proximal apexes and anchor pins of said proximal anchor stent ring;

radially constraining a graft material of said endoprosthesis in a primary sheath, said graft material being attached to a distal end of said proximal anchor stent ring;

retracting said primary sheath to deploy at least a portion of said endoprosthesis; and

advancing said tip to deploy said proximal anchor stent ring.

22. The method of claim 21 wherein said anchor pins of said proximal anchor stent ring penetrate into a vessel wall upon deployment of said proximal anchor stent ring.

23. The method of claim 21 wherein said advancing comprises moving said sleeve to expose said spindle pins.

24. The method of claim 23 wherein exposure of said spindle pins releases said proximal portion of said proximal anchor stent ring.

25. The method of claim 24 wherein said proximal anchor stent ring self-expands upon being released.