Embolic filters with controlled pore size

摘要

A device for filtering emboli from blood flowing through a lumen defined by the walls of a vessel in a patient's body. The device has a filter element being expandable from a collapsed configuration to an expanded configuration. The filter element includes a material having pores, and the material having pores includes cylindrical wires having at least three different diameters arranged in a pattern of graduated diameters.

主权项

1. A device for filtering emboli from a patient's vasculature, comprising:
a filter element repositionable between a collapsed configuration and an expanded configuration, the filter element comprising a plurality of cylindrical strands woven together such that the filter element defines a plurality of pores, wherein the plurality of cylindrical strands includes a first strand consisting of a first metal filament defining a first filament diameter, and a second strand consisting of a second metal filament defining a second filament diameter, wherein the first filament diameter is greater than the second filament diameter, wherein the plurality of cylindrical strands further includes a third strand consisting of a third metal filament defining a third filament diameter.