Patent ID: 8374705

Claim:
An implantable medical lead comprising: A lead body; At least one lead terminal arranged in connection with a first portion of said lead body and constructed to be electrically configured for connection to a matching terminal of an implantable medical device; At least one electrode arranged in connection with a second, opposite portion of said lead body; At least one electric conductor running along said lead body and being electrically connected to said at least one lead terminal and said at least one electrode and At least one closed channel running along at least a portion of said lead body and comprising an extracorporeally detectable detection substance at an initial amount with a reduced amount of said detection substance in said at least one closed channel confirming a lead insulation rupture causing said detection substance to leak out of said at least one closed channel and outside of said implantable medical lead; Wherein said at least one closed channel comprises multiple closed chambers separated by respective walls, each of said multiple closed chambers comprising said detection substance; Wherein each of said multiple closed chambers comprises a differing detection substance to identify more accurately where along said lead body a rupture has occurred by identifying said particular detection substance that leads outside of said implantable medical lead.