a coating is formed over the stent to secure it to the extruded inner sleeve the coating may be formed by dipping the portion of the mandrel including the stent into a 2 part silicone bath or other coating material alternatively the coating may be formed by spraying it or molding it over the stent the mandrel is then removed from the inner diameter of the inner sleeve fig6 shows an alternate series of process steps that can be used to make an anti reflux stent in accordance with the present invention beginning at a block 60 an inner sleeve is created on a mandrel by dipping it in a material such as silicone or urethane bath with the inner sleeve created on the mandrel a stent is placed over the proximal end of the inner sleeve at a block 62 the exterior of the stent is then coated at a block 64 by dipping the mandrel including the stent into a material such as 2 part silicone or urethane bath alternatively the coating can be applied by spraying or molding it over the stent the mandrel is then removed from the inner sleeve in some embodiments it may be desirable to add one or more valves to the anti reflux stent fig7 a and 7b illustrates one method of creating a set of valves in an anti reflux stent 70 the anti.