Patent ID: 7803181

Claim:
A method of stenting the ostium of a tubular organ comprising the steps of: a) inserting a medical device partially into said ostium, said medical device including a body portion and a flaring section, said body portion having a body diameter, said flaring section having a flaring diameter, said body diameter and said flaring diameter being different when said sections are in an expanded state, said flaring diameter being at least about 25% greater than a minimum body diameter of said body portion in an expanded state, said flaring section having a maximum flare angle in said expanded state that can be at least about 90° relative to a longitudinal axis of said body portion, said flaring section, and combinations thereof including one or more layers of porous material, non-porous material, and combinations thereof; b) expanding said medical device to cause said body portion to expand in at least a portion of said tubular organ and to cause said flaring section to substantially fully cover said ostium and to at least partially inhibit vasculature ingrowth in regions covered by said expanded flaring section, said flaring section in an expanded position substantially covering at least about 0.5 mm of a region about said ostium, at least a portion of said flaring section having a flare angle in said expanded state that is at least about 90° relative to a longitudinal axis of said body portion; and, c) at least partially controlling molecular diffusion of at least one biological agent through said layer of non-porous material.