Patent ID: 9095642
Filing Date: 2015-08-04
Classification: A61F,A61L

Abstract:
1. An implant for releasing an active substance into a body vessel, the body vessel having a vessel wall and a vessel lumen through which body fluid can flow, the direction of fluid flow being defined by a vessel lumen axis, the implant comprising: a) a hollow member made at least partially of a biodegradable material and having a member wall with an interior surface defining a member lumen which is generally co-axial with the vessel lumen axis and through which fluid can flow, the member wall also having an exterior surface which can contact the vessel wall when implanted; and, b) at least one cavity defined within the interior surface of the member wall, each cavity having side wall portions and a bottom portion together defining a three-dimensional well with an opening exposed only to the member lumen axis and not exposed to the member wall exterior surface, the at least one cavity containing the active substance, the member wall interior surface portion not forming the cavity being substantially free of active substance, wherein active substance retained within the cavity is released over time and directed toward the vessel lumen axis and downstream from the member.