Variable porosity intravascular implant and manufacturing method
AssigneeDePuy Synthes Products, Inc.
InventorJuan A. Lorenzo
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Abstract
A vascular occlusion device for effectively occluding blood flow and pressure to a vascular defect while simultaneously not occluding blood flow and pressure to adjacent vasculature is provided. The vascular occlusion device can include a tubular member that has variable porosity regions along its length. The tubular member can be formed of a plurality of filaments that have different cross-sectional shapes along their length that are indexed to the variable porosity regions along the length of the tubular member.
Claims25
A vascular occlusion device, comprising:
- a tubular member formed from a plurality of braided filaments that define an outer surface having a mesh pattern with mesh openings defined by the braided filaments, the tubular member having a first porosity region along a first length portion of the tubular member and a second porosity region along a second length portion of the tubular member, wherein the first porosity region includes filaments having a different shape than the filaments in the second porosity region and the porosity of the first porosity region being less than the porosity of the second porosity region, the tubular member having a constant pick count throughout its length.
A method of manufacturing a tubular intravascular implant, comprising:
- providing a plurality of supply spools, each having a supply of a filament having a round cross-sectional shape;
- advancing the filaments on each supply spool to a corresponding collection spool;
- deforming a selected number of the filaments in a selected region thereof at selected intervals between the supply spools and the collection spools such that at least some of the collection spools have filaments with a round cross-sectional shape and a flattened cross-sectional shape;
- utilizing the filaments in the collection spools in a filament braiding device to form a tubular member with an outer surface defined by the braided filaments, the tubular member having a length with regions of a first, lower porosity and regions of a second, higher porosity.
Dependencies are inferred from the claim text.