OSTIUM SUPPORT FOR TREATING VASCULAR BIFURCATIONS

• US 20110004291A1
• Filed: 07/01/2010
• Published: 01/06/2011
• Est. Priority Date: 07/02/2009
• Status: Active Grant

• Current Assignee: Poseidon Medical Inc.
• Original Assignee: Tryton Medical, Inc.
• Inventors: Kaplan, Aaron, Davis, H. Richard
• Granted Patent: US 8,382,818 B2
• Time in Patent Office: Days
• US Class Current: 623/1.16
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• 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 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61F 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: A61F 2250/0068 the pharmaceutical product being in a reservoir

Abstract

A prosthesis is disclosed for placement across an ostium opening from a main body lumen to a branch body lumen. The prosthesis comprises a radially expansible support at one end, a circumferentially extending link at the other end and at least one frond extending axially therebetween. The circumferential link can comprise a catheter securement portion and a frond engagement portion.

Claims

1. A prosthesis for placement at an opening from a main body lumen to a branch body lumen, the prosthesis comprising:

a radially expansible support configured to be deployed in at least a portion of the branch body lumen;

a plurality of fronds extending from an end of the support, the fronds configured to be positioned across the opening and into the main body lumen;

a plurality of elongate side wall spaces in between adjacent fronds, the spaces configured to receive a stent deployment device therethrough; and

a circumferential link connected to the fronds, the circumferential link spaced apart from the support by the fronds, the circumferential link comprising a first portion located adjacent to proximal ends of the fronds, and a second portion located on a proximal side of the first portion, the second portion configured to surround a space that can be occupied by at least a portion of an expansion device.

2. The prosthesis of claim 1, wherein the first portion comprises an undulating circumferentially expandable structure.

3. The prosthesis of claim 1, wherein the first portion comprises a plurality of peaks and valleys that are axially arranged.

4. The prosthesis of claim 3, wherein alternating peaks of the first portion are coupled with the proximal ends of the fronds.

5. The prosthesis of claim 1, wherein the first portion is configured to absorb torque applied from the fronds to isolate mechanically a distal portion of the second portion from the torque.

6. The prosthesis of claim 1, wherein the second portion comprises a circumferentially expandable structure.

7. The prosthesis of claim 1, wherein the second portion has an undulating configuration.

8. The prosthesis of claim 7, wherein the undulating pattern is out-of-phase with an undulating pattern of the first portion.

9. The prosthesis of claim 1 further comprising an axial coupling member disposed between the first portion and the second portion.

10. The prosthesis of claim 9, wherein the axial coupling member provides sufficient connection between the first portion and the second portion to resist premature expansion of a proximal portion of the first portion from a low profile configuration.

11. The prosthesis of claim 9, wherein the axial coupling member comprises a plurality of axially extending connectors.

12. The prosthesis of claim 11, wherein each connector connects a peak of the second portion with a valley of the first portion.

13. The prosthesis of claim 9, wherein the axial coupling member is a generally straight member.

14. The prosthesis of claim 9, wherein the axial coupling member has one or more undulations.

15. A prosthesis for placement at an opening from a main body lumen to a branch body lumen, the prosthesis comprising:

a radially expansible support configured to be deployed in at least a portion of the branch body lumen, the support adapted to provide a radial force to support a first body lumen;

a plurality of fronds extending from an end of the support, the fronds configured to be positioned across the opening and into a second body lumen; and

a circumferential link connected to at least one of the fronds, the circumferential link spaced apart from the support by the fronds,

wherein the circumferential link comprises a frond engagement portion adjacent to proximal ends of the fronds and a catheter securement portion located on a proximal side of the frond engagement portion.

16. The prosthesis of claim 15 further comprising an axially extending member disposed between the frond engagement portion and the catheter securement portion.

17. The prosthesis of claim 16, wherein the frond engagement portion and the catheter securement portion are undulating portions that extend circumferentially and out-of-phase with each other and wherein the axially extending member connects a trough of the frond engagement portion with a peak of the catheter securement portion.

18. A prosthesis for placement at an ostium opening from a first body lumen to a second body lumen, the prosthesis comprising:

a radially expansible support configured to be deployed in at least a portion of the first body lumen;

at least one frond extending from an end of the support, the at least one frond configured to be positioned across the ostium opening; and

a circumferential link connected to the at least one frond, the circumferential link spaced apart from the support by the at least one frond,

wherein the circumferential link comprises a catheter securement portion located adjacent to an end of the at least one frond that is spaced apart from the support and a frond engagement portion located adjacent the end of the at least one frond that is spaced apart from the support, the frond engagement portion located between the catheter securement portion and the support, the catheter securement portion configured to surround a space that can be occupied by at least a portion of an expansion device;

wherein the prosthesis is configured to receive a second prosthesis through the space surrounded by the catheter securement portion such that when the second prosthesis is deployed the at least one frond is entrapped between a vessel wall and the second prosthesis.

19. The prosthesis of claim 18 wherein the at least one frond is configured to be disposed in the second body lumen in an upstream or downstream direction from the ostium when deployed.

20. The prosthesis of claim 18 further comprising an axial coupling member disposed between the frond engagement portion and the catheter securement portion.

21. The prosthesis of claim 20, wherein the frond engagement portion and the catheter securement portion are undulating portions that extend circumferentially and out-of-phase with each other and wherein the axial coupling member connects a trough of the frond engagement portion with a peak of the catheter securement portion.