Device for promoting fistula patency and method

摘要

A device for promoting patency of a fistula includes an annular body and a plurality of vanes formed integrally with the annular body, and projecting inwardly from an inner radial surface thereof. The vanes are oriented so as to impart circumferential velocity components to blood passed through a lumen of the device, and such that an unobstructed line of sight parallel to a central axis of the annular body extends between adjacent ones of the vanes.

主权项

1. A device for promoting patency of an arteriovenous fistula comprising:
an annular body defining a center axis and having a first axial end, a second axial end, an outer radial surface, and an inner radial surface defining a central lumen extending from the first axial end to the second axial end; a plurality of flow-directing vanes formed integrally with the annular body and projecting inwardly from the inner radial surface, and each having an inner edge, an outer edge, a leading edge, and a trailing edge, where each of the leading edges are spaced axially outward of the first axial end and each of the trailing edges are spaced axially outward of the second axial end; and each of the plurality of vanes further having a circumferentially and axially advancing orientation such that an unobstructed line of sight parallel to the center axis extends between adjacent ones of the plurality of vanes.