Ring on a closed web stent-graft for use in tip capture

• US 10,335,265 B2
• Filed: 10/08/2014
• Issued: 07/02/2019
• Est. Priority Date: 04/27/2012
• Status: Active Grant

• Current Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Original Assignee: Medtronic Vascular, Inc. (Medtronic Plc)
• Inventors: Kinkade, Jeremy, Stiger, Mark, Woll, Brandon, Schmitt, Joshua
• Primary Examiner(s): Dornbusch, Dianne
• Application Number:
  US14/509,128
• Publication Number:
  US 20150025617A1
• Time in Patent Office: 1,728 Days
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/9662 the middle portion of the stent or stent-graft is released first
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires

Abstract

A stent-graft has a closed web end configuration in which endmost stent crowns do not extend beyond an end or edge of a tubular graft. In order to couple the stent-graft to tip capture fingers or prongs of a delivery system, the stent-graft includes a ring woven between the endmost crowns of an end stent. When end stent is in a compressed delivery configuration, sections of the ring between adjacent endmost crowns form attachment loops that longitudinally extend beyond the end of the tubular graft for engaging the tip capture fingers of a delivery system. When the end stent is in an expanded fully deployed configuration, the attachment loops retract back to the stent so that the ring is a circular band having a diameter substantially equal to the expanded diameter of the stent.

Claims

1. A prosthesis for implantation within a body lumen, the prosthesis being configured for delivery via a catheter having a tip capture mechanism at a distal end thereof, the tip capture mechanism including at least a first tip capture finger and a second tip capture finger, the prosthesis comprising:

a tubular graft of a graft material;

a stent coupled to the tubular graft and including a plurality of crowns and a plurality of struts with each crown being formed between a pair of opposing struts, the stent having endmost crowns that are adjacent to and distal of a proximal edge of the tubular graft, wherein the endmost crowns are secured to the graft material of the tubular graft; and

a ring that directly engages the endmost crowns of the stent, wherein the ring includes a plurality of integral sections that collectively form the ring and each integral section extends between two endmost crowns when the stent is in a compressed delivery configuration, and wherein each of a first integral section of the ring and a second integral section of the ring longitudinally extends beyond the proximal edge of the tubular graft as an attachment loop of the prosthesis that is configured to engage the first tip capture finger and the second tip capture finger, respectively, of the catheter when the stent is in the compressed delivery configuration, the first and second integral sections being disposed at opposing locations of the stent, and

wherein each of the first integral section of the ring and the second integral section of the ring do not longitudinally extend beyond the proximal edge of the tubular graft when the stent is in an expanded deployed configuration.

2. The prosthesis of claim 1, wherein the ring is a circular band when the stent is in the expanded deployed configuration.

3. The prosthesis of claim 1, wherein the ring has a sinusoidal shape-set configuration when the stent is in the expanded deployed configuration.

4. The prosthesis of claim 1, wherein each integral section of the ring extends between a pair of adjacent endmost crowns.

5. The prosthesis of claim 1, wherein the ring pierces the graft material of the tubular graft and the plurality of integral sections of the ring alternate between inside and outside surfaces of the tubular graft.

6. The prosthesis of claim 1, wherein the stent is coupled to an inside surface of the tubular graft and wherein the ring directly engages the endmost crowns without piercing the graft material of the tubular graft.

7. The prosthesis of claim 1, wherein the stent is coupled to an outside surface of the tubular graft and wherein the ring directly engages the endmost crowns without piercing the graft material of the tubular graft.

8. The prosthesis of claim 1, wherein all of the plurality of integral sections of the ring form attachment loops that longitudinally extend beyond the proximal edge of the tubular graft when the stent is in the compressed delivery configuration.

9. The prosthesis of claim 1, wherein every other integral section of the ring forms attachment loops that longitudinally extend beyond the proximal edge of the tubular graft when the stent is in the compressed delivery configuration.

10. The prosthesis of claim 9, wherein the integral sections of the ring that do not form attachment loops are coupled to the graft material of the tubular graft.

11. The prosthesis of claim 1, further comprising:

a plurality of stents coupled to a body of the tubular graft, wherein each stent is a sinusoidal patterned ring having a first set of crowns near the proximal edge of the tubular graft and a second set of crowns distant from the proximal edge of the tubular graft relative to the first set of crowns.

12. The prosthesis of claim 11, wherein the ring directly engages endmost crowns of a first stent most proximate to the proximal edge of the tubular graft.

13. The prosthesis of claim 12, further comprising:

at least one suture extending between a second stent adjacent to the first stent and an integral section of the ring that does not form an attachment loop.

14. The prosthesis of claim 12, further comprising:

a second ring coupled to struts of the first stent, wherein the second ring loops around the ring at at least one intersection point on an integral section of the ring that does not form an attachment loop that longitudinally extends beyond the proximal edge of the tubular graft.

15. The prosthesis of claim 12, further comprising:

a second ring coupled to a second stent adjacent to the first stent, wherein the second ring loops around the ring at at least one intersection point on an integral section of the ring that does not form an attachment loop that longitudinally extends beyond the proximal edge of the tubular graft.

16. The prosthesis of claim 11, wherein the ring directly engages the first set of crowns of a second stent adjacent to a first stent most proximate to the proximal edge of the tubular graft.

17. The prosthesis of claim 1, wherein the stent is coupled to the tubular graft to extend from the proximal edge of the tubular graft to a distal edge of the tubular graft.

18. The prosthesis of claim 1, wherein the ring directly engages the endmost crowns of the stent by being woven between adjacent endmost crowns of the stent.

19. A delivery system for implanting a stent-graft prosthesis within a body lumen, the delivery system comprising:

a catheter including an outer delivery sheath and a catheter shaft slidingly disposed within the outer delivery sheath, the catheter shaft having a tip capture mechanism at a distal end thereof, wherein the tip capture mechanism includes a first tip capture finger and a second tip capture finger; and

a stent-graft prosthesis mounted on the catheter shaft proximal to the tip capture mechanism at the distal end of the catheter shaft, the stent-graft prosthesis including a stent coupled to a tubular graft of a graft material, wherein the stent includes a plurality of crowns and a plurality of struts with each crown being formed between a pair of opposing struts, and endmost crowns that are adjacent to and distal of a proximal edge of the tubular graft and secured to the graft material of the tubular graft;

wherein a ring directly engages the endmost crowns of the stent, a section of the ring being defined as the portion which extends between two endmost crowns when the stent is in a compressed delivery configuration, and wherein each of a first section of the ring and a second section of the ring longitudinally extends beyond the proximal edge of the tubular graft as an attachment loop of the stent-graft prosthesis that engages the first tip capture finger and the second tip capture finger, respectively, when the stent is in the compressed delivery configuration, the first and second integral sections being disposed at opposing locations of the stent, and

wherein each of the first section of the ring and the second section of the ring do not longitudinally extend beyond the proximal edge of the tubular graft when the stent is in an expanded deployed configuration.

20. A prosthesis for implantation within a body lumen, the prosthesis being configured for delivery via a catheter having a tip capture mechanism at a distal end thereof, the tip capture mechanism including a first tip capture finger and a second tip capture finger, the prosthesis comprising:

a tubular graft of a graft material;

a stent coupled to the tubular graft and including a plurality of crowns and a plurality of struts with each crown being formed between a pair of opposing struts, the stent having endmost crowns that are adjacent to and distal of a proximal edge of the tubular graft, wherein the endmost crowns are secured to the graft material of the tubular graft; and

a ring that directly engages the endmost crowns of the stent, a section of the ring being defined as the portion which extends between two endmost crowns when the stent is in a compressed delivery configuration, wherein each of a first section of the ring and a second section of the ring transforms into an attachment loop of the prosthesis that longitudinally extends beyond the proximal edge of the tubular graft and is configured to engage the first tip capture finger and the second tip capture finger, respectively, of the catheter when the stent is in the compressed delivery configuration, the first and second integral sections being disposed at opposing locations of the stent, and wherein each of the first section of the ring and the second section of the ring retracts into the stent when the stent is in an expanded deployed configuration so that the ring has a diameter that is substantially equal to an expanded diameter of the stent.