Stent graft assembly and method

• US 8,747,450 B2
• Filed: 06/27/2012
• Issued: 06/10/2014
• Est. Priority Date: 04/28/2000
• Status: Expired due to Fees

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Covidien LP (Medtronic Plc)
• Inventors: Garrison, Michi E., Rudakov, Leon V.
• Primary Examiner(s): Bui, Vy Q
• Application Number:
  US13/535,100
• Publication Number:
  US 20120296416A1
• Time in Patent Office: 713 Days
• Field of Search: 623/1.11, 623/1.12, 623/1.13, 623/1.14, 623/1.15, 623/1.16, 623/1.17, 623/1.18, 623/1.19, 623/1.2, 623/1.21, 606/108, 606/191, 606/195
• US Class Current: 623/1.13
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/852 Two or more distinct overlapping stents
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• 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 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• 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 2002/91566 connected trough to trough
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2220/0033 made by longitudinally pushing a protrusion into a complementary-shaped recess, e.g. held by friction fit
• 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
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2240/001 Designing or manufacturing processes
• CPC Class Codes: A61F 2250/0063 Nested prosthetic parts
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: A61F 2250/0071 breakable or frangible
• CPC Class Codes: A61F 2250/0098 : radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61L 31/048 : obtained by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: A61L 31/06 : obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: A61L 31/18 : Materials at least partially X-ray or laser opaque
• CPC Class Codes: C08L 27/18 : Homopolymers or copolymers or tetrafluoroethene
• CPC Class Codes: C08L 75/04 : Polyurethanes
• CPC Class Codes: Y10T 29/49826 : Assembling or joining

Abstract

A method for assembling a stent graft onto a balloon delivery catheter is disclosed. The method includes the steps of: assembling a graft over a stent with attached security rings and inserting the ends of the graft between the stent and the rings; placing the assembled stent graft on the delivery balloon of the delivery catheter; and crimping the stent graft onto the balloon. The stent may include a plurality of axially aligned belts that include a plurality of mid belts, and first and second end belts, where each of the mid belts includes a plurality of circumferentially spaced struts having first and second ends adjoining first sinusoidal-shaped elements, and each of the first and second end belts includes at least about twice the number of circumferentially spaced struts adjoining second sinusoidal-shaped elements. Also disclosed is a stent graft for use in practicing the method.

Claims

1. A method of retaining a polymeric sleeve on a stent, where the polymeric sleeve is located over an outer wall of the stent, the stent including an opening, the improvement comprising:

urging a portion of the polymeric sleeve from over the outer wall of the stent into a volume of the opening, the volume of the opening being surrounded by an inner wall; and

frictionally engaging the polymeric sleeve portion with the stent between the inner wall and a member received within the opening.

2. The method of claim 1, wherein the member comprises a radiopaque marker.

3. The method of claim 2, wherein a plurality of openings are included in the stent, each opening receiving a radiopaque marker engaging the polymeric sleeve.

12. The method of claim 1, wherein the frictionally engaging comprises inserting the member through the opening in a radial direction.

13. The method of claim 1, wherein the frictionally engaging comprises inserting the member into the opening without piercing the polymeric sleeve.

14. The method of claim 1, wherein the urging comprises contacting the member against an outer side of the sleeve.

4. A stent graft for positioning within a body lumen, the graft comprising:

a polymeric sleeve;

a stent including an opening having a volume surrounded by an inner wall; and

a member frictionally received within the opening such that the polymeric sleeve is disposed within the volume of the opening and engaged between the inner wall and the member.

5. The stent graft of claim 4, wherein the member comprises a radiopaque marker.

6. The stent graft of claim 5, wherein a plurality of openings is included in the stent, each opening receiving a radiopaque marker engaging the polymeric sleeve.

7. The stent graft of claim 4, wherein the opening is substantially circular.

8. The stent graft of claim 7, wherein at least a portion of the member is cylindrical.

9. The stent graft of claim 4, wherein the member extends through the opening when frictionally received within the opening.

10. The stent graft of claim 9, wherein the member extends radially through the opening.

11. The stent graft of claim 4, wherein the member is frictionally received within the opening without piercing the polymeric sleeve.

15. The stent graft of claim 4, wherein the member contacts only an outer side of the sleeve, and an inner side of the sleeve contacts the inner wall.

16. A stent graft for positioning within a body lumen, the graft comprising:

a graft component;

a stent including an opening having a volume surrounded by an inner wall; and

a member frictionally received within the opening such that a portion of the graft component is disposed within the volume of the opening and engaged between the inner wall and the member.

17. The stent graft of claim 16, wherein the graft component comprises a polymeric sleeve.

18. The stent graft of claim 16, wherein the graft component comprises a tubular material extending over the stent.

19. The stent graft of claim 16, wherein the member is frictionally received within the opening without piercing the graft component.

20. The stent graft of claim 16, wherein the member extends radially through the opening.