An expandable medical device having occlusion properties, comprises an elongate carrying frame having a defined length, said frame being expandable from a collapsed condition to an expanded condition,a thin film mesh secured to said elongate carrying frame and said thin film mesh has a plurality of openings therethrough that vary in degree of openness as said carrying frame moves between said collapsed condition and said expanded condition and wherein the thin film mesh is attached to the carrying frame by spring arms arranged to hold the thin film mesh taut and in place in the collapsed condition and in the expanded condition.
