A method of applying a universal coating for a medical device comprising a medical device component, the medical device component having an outer surface and an inner surface, the universal coating applied to at least the outer surface or the inner surface of the medical device component, wherein the coating is made from a material selected from the group consisting of diamond, diamond-like, borosilicate glass, carbides and nitrides. The medical device can further be a smart medical device by incorporating a sensor placed capable of measuring chemical and/or electrical conditions. A method of applying the coating inside complicated 3D structures without the need for bonding diamond to diamond or DLC to DLC layers is also provided.