Flexible Expandable Stent

• US 20070299507A1
• Filed: 09/05/2007
• Published: 12/27/2007
• Est. Priority Date: 03/17/1994
• Status: Abandoned Application

• Current Assignee: Medinol Limited (Medinol USA Incorporated)
• Original Assignee: Medinol Limited (Medinol USA Incorporated)
• Inventors: Israel, Henry, Pinchasik, Gregory
• Application Number:
  US11/850,078
• Publication Number:
  US 20070299507A1
• 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 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 implanting in the body to hold open a blood vessel includes cells with facing loops and the curved flexible links disposed and adapted to cooperate so that, when unexpanded, the stent can flex as it is moved through curved blood vessels to a site where it is to be expanded and so that, when the stent is expanded in a curved vessel, at that site, as compared to each other, cells on the outside of the curve are open in length, but narrow in width as compared to cells on the inside of the curve which are short in length but increased in width to result in a more constant stent cell area between the inside and the outside of the curve than would otherwise occur causing the stent, when coated with a medicine, to apply a more even dose to the inside wall of the lumen, avoiding the possibility that a toxic dose is supplied at one area while a less than effective dose is applied to another area.

Claims

1. A stent comprising a mesh of adjacent, connected cells, each cell comprising:

an even number of fixed length, alternating, first and second loops, connected together in a closed cell, each loop having at least two portions with an area of inflection there between, said first and second loops defining first and second angles whose bisecting lines are at angles one to another;

the second angles defined by the second loops being greater than the first angles defined by the first loops.

2. The stent according to claim 1, wherein the second angles defined by the second loops are obtuse.

3. The stent according to claim 1, wherein the second angles defined by the second loops are acute.

4. The stent according to claim 3, wherein the first angles defined by the first loops are acute.

5. A stent comprising a mesh of adjacent, connected cells, each cell comprising:

an even number of fixed length, alternating, first and second loops, connected together in a closed cell, each loop having at least two portions with an area of inflection there between, said first and second loops defining first and second angles whose bisecting lines are at angles one to another;

the first angles defined by the first loops being acute;

the second angles defined by the second loops being obtuse.

6. A stent comprising a mesh of adjacent, connected cells, each cell comprising:

an even number of fixed length, alternating, first and second loops, connected together in a closed cell, each loop having at least two portions with an area of inflection there between, said first and second loops defining first and second angles whose bisecting lines are at angles one to another;

the first angles defined by the first loops being acute;

the second angles defined by the second loops being right angles.