Stent for ostial lesions and vascular bifurcations

• US 20060224233A1
• Filed: 04/20/2005
• Published: 10/05/2006
• Est. Priority Date: 04/03/2005
• Status: Active Grant

• Current Assignee: Liliana Rosa Grinfeld, Roberto Rafael Grinfeld
• Original Assignee: Liliana Rosa Grinfeld, Roberto Rafael Grinfeld
• Inventors: Grinfeld, Liliana Rosa, Grinfeld, Roberto Rafael
• Granted Patent: US 7,879,083 B2
• Time in Patent Office: Days
• US Class Current: 623/1.160
• 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 2002/821 Ostial stents
• CPC Class Codes: A61F 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped

Abstract

A stent for ostial lesions and vascular bifurcations has a tubular body comprised by a succession of sections of skeletal members. In one or both end rows of the tubular body, there are expansive bending devices comprising sectional weakenings and open extremities. In the case of the end row, by a proper expander balloon, expansive bending of longitudinal branches of the end row may be produced. Bending is produced due to sectional weakenings. Open extremities allow producing the expansion in a way such as the flourishing of a flower bloom. Under such conditions, bending of the end row makes possible the adequate coverage of the ostial or bifurcation lesion affecting wall of the application vascular conduit.

Claims

1. A stent for vascular ostial and bifurcation lesions constituted by a tubular body formed by a metal framework which, when subjected to the action of an expansion balloon is capable of exerting tension in a direction of its diametrical expansion until outer surfaces press against an endothelium of an application vascular conduit, defining an endovascular positioning which maintains or increases the clearance of said conduit, comprising:

said tubular body constituted by a succession of sections a framework of which is festoon shaped;

each festoon shaped section being comprised by rows of entrances and projections;

said sections and said rows being engaged by means of engaging bridges;

at least one end row comprises means affording expansive bending capacity; and

said expansive bending forming a portion to be attached to the ostial or bifurcation lesion.

2. The stent for vascular ostial and bifurcation lesions as claimed in claim 1, wherein said means affording expansive bending capacity comprise sectional weakenings in said at least one row.

3. The stent for vascular ostial and bifurcation lesions as claimed in claim 2, wherein said sectional weakenings affect the longitudinal branches of the at least one end row.

4. The stent for vascular ostial and bifurcation lesions as claimed in claim 2, wherein said sectional weakenings are constituted by thinness regions.

5. The stent for vascular ostial and bifurcation lesions as claimed in claim 4, wherein said sectional weakenings are constituted by entrances surrounding, partially or completely, respective branches of the at least one end row.

6. The stent for vascular ostial and bifurcation lesions as claimed in claim 1, wherein the means affording expansive bending capacity comprise open extremities wherein longitudinal branches of the at least one end row terminate.

7. The stent for vascular ostial and bifurcation lesions as claimed in claim 6, wherein all of said longitudinal branches terminate in open extremities.

8. The stent for vascular ostial and bifurcation lesions as claimed in claim 1, wherein the means affording expansive bending capacity comprise sectional weakenings in at least one end row and open extremities wherein longitudinal branches of each said end row terminate.

9. The stent for vascular ostial and bifurcation lesions as claimed in claim 1, which further comprises depressions along the rows.

10. The stent for vascular ostial and bifurcation lesions as claimed in claim 1, wherein outer surfaces as well as depressions constitute paths for transferring drugs to the endothelium of the application vascular conduit.