SECUREMENT ASSEMBLY AND METHOD FOR EXPANDABLE ENDOVASCULAR DEVICE

• US 20090132020A1
• Filed: 11/16/2007
• Published: 05/21/2009
• Est. Priority Date: 11/16/2007
• Status: Active Grant

• Current Assignee: Endologix
• Original Assignee: Boston Scientific Corporation
• Inventors: Watson, James R.
• Granted Patent: US 8,083,789 B2
• Time in Patent Office: Days
• US Class Current: 623/1.110
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires

Abstract

A securement assembly for releasably securing an expandable stent or stent-graft relative to a delivery tube. The securement assembly comprises a belt base configured for securement relative to the delivery tube. The belt base defines a release member passage and a receiving portion. A first end of a belt is fixed relative to the belt base. The opposite end of the belt includes a retainment portion configured to releasably engage the receiving portion of the belt base. A release member is removably positioned through the release member passage and aligned with the belt retainment portion such that the retainment portion is maintained engaged with the receiving portion until the release member is moved to a non-aligned position. A method of releasably securing a portion of an expandable stent or stent-graft relative to a delivery tube is also provided.

Claims

1. A securement assembly for releasably securing an expandable stent or stent-graft relative to a delivery tube, the securement assembly comprising:

a belt base configured for securement relative to the delivery tube, the belt base defining a release member passage and a receiving portion;

a belt having first and second ends, the first end fixed relative to the belt base, the second end including a retainment portion configured to releasably engage the receiving portion of the belt base; and

a release member removably positioned through the release member passage and aligned with the belt retainment portion such that the retainment portion is maintained engaged with the receiving portion until the release member is moved to a non-aligned position.

2. The securement assembly of claim 1 wherein the retainment portion is defined by a member attached to the second end of the belt and the receiving portion is a corresponding slot.

3. The securement assembly of claim 2 wherein the release member passage is circumferentially aligned with the slot.

4. The securement assembly of claim 2 wherein the member is a cylindrical rod and the slot is a rectangular slot.

5. The securement assembly of claim 2 wherein the member is a sphere and the slot has a semi-spherical configuration.

6. The securement assembly of claim 5 wherein the sphere includes a through hole and the belt second end is secured therein.

7. The securement assembly of claim 2 wherein the member has a secondary release wire passage therethrough configured to align with the release member passage when the retainment portion is engaged with the receiving portion.

8. The securement assembly of claim 1 wherein the first end of the belt is fixed directly to the belt base.

9. The securement assembly of claim 1 wherein the first end of the belt is fixed to the delivery tube.

10. The securement assembly of claim 1 wherein the first end of the belt has a shaped configuration which engages a portion of the belt base and fixes the first end relative thereto.

11. The securement assembly of claim 1 wherein the retainment portion is defined by a configuration of the second end of the belt and the receiving portion is a corresponding shoulder.

12. The securement assembly of claim 11 wherein the second end of the belt is bent at a substantially 90°

such that the retainment portion is defined by an L-shaped flange.

13. The securement assembly of claim 11 wherein the second end of the belt is bent at a substantially 180°

such that the retainment portion is defined by a U-shaped flange.

14. The securement assembly of claim 11 wherein the second end of the belt wrapped upon itself such that the retainment portion is defined by a D-shaped flange.

15. The securement assembly of claim 14 wherein the shoulder includes an arcuate recess configured to receive the D-shaped flange.

16. The securement assembly of claim 1 wherein the retainment portion is defined by an opening in the second end of the belt and the receiving portion is defined by a first end of a post extending from the belt base.

17. The securement assembly of claim 16 wherein the opening is defined as a through hole.

18. The securement assembly of claim 16 wherein the opening is defined as an arcuate notch.

19. The securement assembly of claim 16 wherein the post first end is tapered.

20. The securement assembly of claim 16 wherein the post includes a second end configured to engage a second opening at the first end of the belt to fix the first end relative to the belt base.

21. The securement assembly of claim 16 wherein the post has a radial clearance such that the post is free to tilt when retainment portion of the belt is engaged therewith.

22. A method of releasably securing a portion of an expandable stent or stent-graft relative to a delivery tube, comprising:

securing a belt base relative to the delivery tube, the belt base defining a release member passage and a receiving portion;

securing a first end of a belt relative to the belt base;

positioning the portion of the expandable endovascular device relative to the belt base;

extending the belt about the portion of the expandable endovascular device;

releasably engaging a retainment portion of the belt with the receiving portion of the belt base; and

removably positioning a release member through the release member passage such that the release member is aligned with the belt retainment portion and maintains such engaged with the receiving portion until the release member is moved to a non-aligned position.