Helical ostium support for treating vascular bifurcations

• US 7,758,630 B2
• Filed: 11/21/2006
• Issued: 07/20/2010
• 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.
• Primary Examiner(s): Isabella; David J
• Assistant Examiner(s): SCHILLINGER, ANN M
• Application Number:
  US11/603,338
• Publication Number:
  US 20070276460A1
• Time in Patent Office: 1,337 Days
• Field of Search: 623 111- 154
• 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 2/954 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 method for treating a bifurcation between a main lumen and a branch lumen, comprising the steps of:

providing a radially expandable scaffold, having a proximal end, a distal end, a support structure on the distal end, a circumferential link on the proximal end and at least one spiral frond having a distal end connected to the support structure and a proximal end connected to the circumferential link;

transluminally navigating the scaffold to a treatment site; and

deploying the scaffold at the site such that the support is in the branch lumen and the circumferential link is in the main lumen positioned a distance from the bifurcation wherein a first end of the spiral frond is located on a branch vessel side of the ostium, and a second end of the spiral frond is located on a main vessel side of the ostium.

2. A method as in claim 1, further comprising the step of positioning an inflatable balloon in the main lumen, and deforming the circumferential link such that it conforms to at least a portion of the wall of the main lumen.

3. A method as in claim 2, further comprising the step of deploying a stent in the main lumen.

4. A method of supporting a vessel wall in the vicinity of an ostium between a main vessel and a branch vessel, comprising the steps of:

providing a radially expandable scaffold, a circumferential link, and positioning at least one spiral frond across the ostium, the frond having a first end on a first, branch vessel side of the ostium and a second end terminating on a second, main vessel side of the ostium;

supporting the first end of the frond against the vessel wall on the first side of the ostium; and

biasing the second end of the frond radially outward and toward the vessel wall on the second side of and spaced from the ostium.

5. A method of supporting a vessel wall as in claim 4, wherein the supporting the first end step comprises expanding a first expandable support structure against the vessel wall.

6. A method of supporting a vessel wall as in claim 5, wherein the first expandable support structure is attached to the first end of the frond.

7. A method of supporting a vessel wall as in claim 5, wherein the expanding step comprises permitting the first expandable support structure to self expand.

8. A method of supporting a vessel wall as in claim 5, wherein the expanding step comprises forcibly expanding the first expandable support structure.

9. A method of supporting a vessel wall as in claim 4, wherein the supporting the second end step comprises expanding a second expandable support structure against the vessel wall.

10. A method of supporting a vessel wall as in claim 9, wherein the second expandable support structure is attached to the second end of the frond.

11. A method of supporting a vessel wall as in claim 9, wherein the expanding step comprises expanding the second support structure such that the second end of the frond is entrapped between the second support structure and the vessel wall.

12. A method of supporting a vessel wall as in claim 4, comprising the step of positioning at least two fronds across the ostium.

13. A method of supporting a vessel wall as in claim 4, comprising the step of positioning at least four fronds across the ostium.

14. A method of supporting a vessel wall as in claim 4, wherein all of the spiral fronds are positioned across the ostium and have a first end connected to the scaffold and a second end connected to the circumferential link.