An implantable lead in the form of an electrical conductor wire having an insulating layer of impervious plastic surrounding the surface of the electrical conductor wire and further having an exterior surface covering of porous PTFE. The impervious plastic insulating layer is preferably a thermoplastic...http://www.google.de/patents/US5358516?utm_source=gb-gplus-sharePatent US5358516 - Implantable electrophysiology lead and method of making
