Delivery system for stent-graft with anchoring pins

• US 8,052,732 B2
• Filed: 11/14/2006
• Issued: 11/08/2011
• Est. Priority Date: 11/14/2006
• Status: Active Grant

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Yang, Frank, Greenan, Trevor, Mitchell, James, Murray, Robert, Rust, Matthew, Muzslay, Heath
• Primary Examiner(s): Hughes; S. Thomas
• Assistant Examiner(s): TANNER, JOCELIN C
• Application Number:
  US11/559,754
• Publication Number:
  US 20080114442A1
• Time in Patent Office: 1,820 Days
• Field of Search: 623/1.11, 623/1.12, 623/1.23, 623/1.13, 623/1.14, 623/1.36
• US Class Current: 623/1.11
• 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;

a primary sheath abutment surface, said sleeve extending proximally from said primary sheath abutment surface;

an endoprosthesis comprising a 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, said anchor pins comprising distal tips uncovered by said sleeve when said proximal anchor stent ring is in a delivery profile to prevent said distal tips from engaging said sleeve;

a primary sheath extending distally around said entire sleeve and to said primary sheath abutment surface when said proximal anchor stent ring is in said delivery profile; and

a handle comprising a primary sheath actuation member for retracting said primary sheath.

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 tapered outer surface extends 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 1 wherein said sleeve comprises a cylindrical outer surface and a cylindrical inner surface, said spindle body comprising a cylindrical outer surface.

8. The delivery system of claim 1 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.

9. The delivery system of claim 7 wherein an annular space exists between said spindle body and said inner cylindrical surface of said sleeve.

10. The delivery system of claim 9 wherein said proximal anchor stent ring is in said annular space.

11. 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.

12. The delivery system of claim 11 wherein said handle further comprises an inner tube actuation member for advancing said inner tube relative to said outer tube.

13. The delivery system of claim 11 wherein said primary sheath is over said outer tube, said primary sheath capable of being longitudinally moved relative to said outer tube and said spindle.

14. The delivery system of claim 13 wherein said primary sheath actuation member is for retracting said primary sheath relative to said outer tube.

15. The delivery system of claim 13 wherein said primary sheath radially compresses said endoprosthesis.

16. The delivery system of claim 1 wherein said distal tips are sharp points.

17. 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;

a primary sheath abutment surface, said sleeve extending proximally from said primary sheath abutment surface;

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, said anchor pins comprising distal tips uncovered by said sleeve when said proximal anchor stent ring is in a delivery profile to prevent said distal tips from engaging said sleeve;

a primary sheath extending distally around said entire sleeve and to said primary sheath abutment surface when said proximal anchor stent ring is in said delivery profile; and

a handle comprising a primary sheath actuation member for retracting said primary sheath.