Patent ID: 9526812
Filing Date: 2016-12-27
CPC Classification: A61B,A61F,A61L,A61M

Claim Text:
1. An implantable biodegradable medical device comprising: a rigid member in the implantable biodegradable medical device, the rigid member having an inner surface and an outer surface; at least one inert layer composing the rigid member, the at least one inert layer capable of providing an axial strength and a radial rigidity to the implantable biodegradable medical device; a plurality of layers on the outer surface of the rigid member composed of at least one biodegradable material, wherein the plurality of layers on the outer surface are coated with a corresponding at least one drug; a plurality of layers on the inner surface of the rigid member composed of at least one biodegradable material, wherein the plurality of layers on the inner surface are coated with a corresponding at least one drug; the at least one inert layer composed of a material not biodegradable unless triggered; wherein the at least one inert layer remains inert to provide the axial strength and the radial rigidity until the plurality of layers on the outer surface of the rigid member have degraded to release the corresponding at least one drug, thereby exposing the at least one inert layer, and wherein the at least one inert layer remains inert to provide the axial strength and the radial rigidity until a degradation of the at least one inert layer is initiated by at least one external trigger; and wherein the plurality of layers on the inner surface of the rigid member remain intact without releasing the corresponding at least one drug until the degradation of the at least one inert layer exposes the plurality of layers on the inner surface.