HELICAL OSTIUM SUPPORT FOR TREATING VASCULAR BIFURCATIONS

• US 20090326641A1
• Filed: 09/03/2009
• Published: 12/31/2009
• Est. Priority Date: 04/14/2003
• Status: Active Grant

• Current Assignee: Poseidon Medical Inc.
• Original Assignee: Tryton Medical, Inc.
• Inventors: Davis, H. Richard, Kaplan, Aaron V.
• Granted Patent: US 8,529,618 B2
• Time in Patent Office: Days
• US Class Current: 623/1.15
• 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 2/954 for placing stents or stent-grafts in a bifurcation
• 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 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• 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 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2002/9583 Means for holding the stent on the balloon, e.g. using protrusions, adhesives or an outer sleeve
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence

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 spiral frond extending axially therebetween.

Claims

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

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

an elongate, flexible spiral frond extending axially from an end of the support and configured to be positioned across the ostium and into the main body lumen; and

at least one circumferential link spaced axially apart from the support by the spiral frond.

2. The prosthesis as in claim 1, wherein the circumferential link comprises a sinusoidal wall pattern.

3. The prosthesis as in claim 1, wherein the circumferential link is expandable from a first, reduced diameter to a second, enlarged diameter.

4. The prosthesis as in claim 1, wherein the frond comprises a resilient metal.

5. The prosthesis as in claim 1, wherein at least a portion of the prosthesis comprises a lubricous coating.

6. The prosthesis as in claim 1, wherein at least a portion of the radially expansible support comprises a drug coating, and at least a portion of the frond and the circumferential link are without a drug coating.

7. The prosthesis as in claim 6, wherein the drug coating is a drug eluting coating.

8. The prosthesis as in claim 6, wherein the drug coating is configured to produce at least one of a controlled drug release rate, a constant drug release rate, bi-modal drug release rate or a controlled concentration of drug proximate a target vessel wall.

9. The prosthesis as in claim 6, wherein the drug is one of an anti-cell prolifertive, anti cell migration, anti-neo plastic, anti inflammatory drug.

10. The prosthesis as in claim 6, wherein the drug is configured to reduce an incidence or amount of restensosis.

11. The prosthesis as in claim 6, wherein the drug includes a first drug and second a drug.

12. The prosthesis as in claim 6, wherein the drug coating includes a first coating and a second coating.

13. The prosthesis as in claim 12, wherein the first coating is configured to produce a first drug release rate and the second coating is configured to produce a second drug release rate.

14. A prosthesis as in claim 1, wherein the frond extends for at least about two full revolutions around the longitudinal axis.

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

a radially expansible branch vessel support having a tubular body with a longitudinal axis, the support configured to be deployed in at least a portion of the branch body lumen; and

a spiral frond extending axially from an end of the support;

the frond extending through at least four complete revolutions around the longitudinal axis and adapted to extend across the ostium.

16. A prosthesis as in claim 15, wherein the support is balloon expandable.

17. A prosthesis as in claim 15, wherein the support is self expandable.

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

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

an ostium section which comprises at least one frond extending in a spiral from an end of the support and configured to be positioned across the ostium and into the main body lumen; and

at least one circumferential link connected to the frond, the circumferential link spaced axially apart from the support.

19. The prosthesis as in claim 18, wherein the circumferential link is expandable from a first, reduced diameter to a second, enlarged diameter.

20. The prosthesis as in claim 18, wherein the at least one frond includes at least three fronds.

21. The prosthesis as in claim 18, wherein at least a portion of the frond comprises a lubricous coating.

22. The prosthesis as in claim 18 wherein the circumferential link is radiopaque.

23. The prosthesis as in claim 22, wherein the circumferential link has a greater radiopacity than the frond.

24. The prosthesis as in claim 18, comprising an endothelial cell ingrowth surface.

25. The prosthesis as in claim 18, comprising a non thrombogenic surface.