Stent for ostial lesions and vascular bifurcations

• US 7,879,083 B2
• Filed: 04/20/2005
• Issued: 02/01/2011
• Est. Priority Date: 04/03/2005
• Status: Expired due to Fees

• Current Assignee: Liliana Rosa Grinfeld, Roberto Rafael Grinfeld
• Original Assignee: Liliana Rosa Grinfeld, Roberto Rafael Grinfeld
• Inventors: Grinfeld, Liliana Rosa, Grinfeld, Roberto Rafael
• Primary Examiner(s): Snow; Bruce E
• Assistant Examiner(s): HOBAN, MELISSA A
• Application Number:
  US11/111,280
• Publication Number:
  US 20060224233A1
• Time in Patent Office: 2,113 Days
• Field of Search: 623/1.16, 623/1.2, 623/1.3, 606155-156
• US Class Current: 623/1.16
• 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 frame work formed by a succession of sections comprised by rows of entrances and projections, each of said rows being linked and separated by engaging bridges, at least one end row comprising means for providing expansion and bending capacity capability;

and said means for providing expansion and bending capability comprising a plurality of independent U-shaped members forming said at least one end row;

each said U-shaped member having a pair of legs;

each said leg having a free end; and

each said leg having means for forming a portion to be attached to the ostial or bifurcation lesion comprising sectional weakenings.

2. The stent for vascular ostial and bifurcation lesions as claimed in claim 1, wherein said sectional weakenings are positioned in longitudinal branches of said legs.

3. The stent for vascular ostial and bifurcation lesions as claimed in claim 1, wherein said sectional weakenings are constituted by thinness regions in said legs which allow said legs to bend against said ostial or bifurcation lesion.

4. The stent for vascular ostial bifurcation lesions as claimed in claim 3, wherein said sectional weakenings are further constituted by entrances surrounding, partially or completely, said legs.

5. The stent for vascular ostial and bifurcation lesions as claimed in claim 1, wherein each said U-shaped member has an open extremity between the legs.

6. The stent for vascular ostial and bifurcation lesions of claim 1, wherein each of said plurality of rows other than said at least one end row are formed by serpentine shaped members.

7. A stent for vascular ostial and bifurcation lesions comprising:

a tubular body formed by a metal frame work formed by a succession of sections comprised by rows of entrances and projections;

said tubular body having a longitudinal axis;

each of said rows being linked and separated by engaging bridges,

said tubular body having an end row formed by a plurality of independent U-shaped members;

each said U-shaped member having a pair of legs which extend parallel to said longitudinal axis;

each said leg having a free end;

and each said leg having a sectional weakening which allows a portion of said leg to bend relative to said longitudinal axis so that said leg portion is attached to the ostial or bifurcation lesion.

8. The stent of claim 7, wherein each said U-shaped member has a curved portion connecting said two legs and an opening between said legs.

9. The stent of claim 7, wherein said leg portion bends from said sectional weakening to said free end relative to said longitudinal axis to position said free end adjacent to said ostial or bifurcation lesion.