Back to results
US 2012/0055011 A1Published application
Methods for manufacturing implantable stents having a plurality of varying parallelogrammic cells
AssigneeDePuy Synthes Products, Inc.
InventorDirk Tenne
Life of this patent
Estimating the term…
Abstract
A stent for implantation within a body vessel is provided with a plurality of varying parallelogrammic cells. The stent is radially expandable from a compressed condition, suitable for inserting the device in an introducer, to a deployed or expanded condition within a body vessel. The stent includes a plurality of parallelogrammic body cells and a plurality of parallelogrammic flare cells. The flare cells have a substantially greater elongation ratio than the body cells. Also provided is a method for manufacturing stents having a plurality of varying parallelogrammic cells.
Claims23
A method of manufacturing a stent implantable within a body vessel of a human subject, comprising:
- providing a tubular member having a diameter corresponding to a compressed condition;
- forming a plurality of substantially parallelogrammic body cells and flare cells in the tubular member, wherein each body cell is defined by a pair of parallel long body cell struts intersecting a pair of parallel short body cell struts, each flare cell is defined by a pair of parallel long flare cell struts intersecting a pair of parallel short flare cell struts;
- and
- said forming includes selecting an elongation ratio of each flare cell, the flare cell elongation ratio being a ratio of long flare cell strut length to short flare cell strut length that is substantially greater than an elongation ratio of each body cell, the body cell elongation ratio being a ratio of long body cell strut length to short body cell strut length.
1 more element
A method of manufacturing a stent implantable within a body vessel of a human subject and having a cell structure forming an endoprosthesis, the method comprising:
- providing a tubular member having a diameter corresponding to a compressed condition;
- forming a plurality of substantially parallelogrammic body cells, wherein each body cell is defined by a pair of parallel long body cell struts intersecting a pair of parallel short body cell struts, the body cells having a body cell elongation ratio of long body cell strut length to short body cell strut length;
- forming a plurality of substantially parallelogrammic flare cells, wherein each flare cell is defined by a pair of parallel long flare cell struts intersecting a pair of parallel short flare cell struts, the flare cells having an elongation ratio of long flare cell strut length to short flare cell strut length, and wherein the flare cell elongation ratio is at least approximately 20% greater than the body cell elongation ratio;
- forming a plurality of connecting cells, wherein each connecting cell is defined by two pairs of parallel and intersecting connecting cell struts, the struts of the connecting cells have a connecting cell elongation ratio wherein the flare cell elongation ratio is at least approximately 20% greater than the connecting cell elongation ratio, and selected connecting cells are adjacent to at least one body cell and at least one flare cell;
- extending each flare cell axially beyond all of the connecting cells such that the entire length of one of the short flare cell struts, the entire length of one of the long flare cell struts (a first flare cell strut) and at least a portion of the length of the other long flare cell struts (a second long flare cell strut) extend axially beyond all of the connecting cells;
- and
- spacing apart the flare cells radially with respect to each other to define free space between the first long flare cell strut of one of the flare cells and the second long flare cell strut of the adjacent flare cell.
4 more elements
A method of manufacturing a stent implantable within a body vessel of a human subject and having a cell structure forming an endoprosthesis, the method comprising:
- providing a tubular member having a diameter corresponding to a compressed condition;
- forming a plurality of substantially parallelogrammic body cells, wherein each body cell is defined by a pair of parallel long body cell struts intersecting a pair of parallel short body cell struts, the body cells having a body cell elongation ratio of long body cell strut length to short body cell strut length;
- forming a plurality of substantially parallelogrammic flare cells, wherein each flare cell is defined by a pair of parallel long flare cell struts intersecting a pair of parallel short flare cell struts, the flare cells having an elongation ratio of long flare cell strut length to short flare cell strut length, and wherein the flare cell elongation ratio is at least approximately 20% greater than said body cell elongation ratio;
- forming a plurality of connecting cells, wherein each connecting cell is defined by two pairs of parallel and intersecting connecting cell struts, the struts of the connecting cells have a connecting cell elongation ratio wherein the flare cell elongation ratio is at least approximately 20% greater than the connecting cell elongation ratio, and selected connecting cells are adjacent to at least one body cell and at least one flare cell;
- extending at least a substantial portion of each flare cell extends axially beyond all of the other cells of the endoprosthesis cell structure such that the entire length of one of the short flare cell struts and a substantial portion of each of the pair of long flare cell struts extend axially beyond all of the other cells;
- and
- spacing the flare cells apart radially with respect to each other to define free space whereby the first long flare cell strut of one of the flare cells is unconnected to the second long flare cell strut of the adjacent flare cell.
4 more elements
Dependencies are inferred from the claim text.