Patent ID: 8903514

Claim:
A medical implantable lead adapted to be implanted into a human or animal body to monitor and/or control an organ inside the body, the lead comprising: an intermediate flexible lead part; a connector at a proximal portion of the intermediate flexible lead part; a tubular header at a distal portion of the intermediate flexible lead part; a rotatable shaft disposed within the tubular header, wherein the rotatable shaft is extendably and retractably arranged relative to the tubular head; an electric conductor electrically coupling the connector to the rotatable shaft; and a helix at a distal end of the rotatable shaft, wherein the helix is electrically coupled to the rotatable shaft, and wherein the helix is configured for fixation to the organ upon rotation and extension of the rotatable shaft; wherein prior to implantation of the lead, the helix having a first configuration comprising a distal portion having an electrically active surface coated with an electrically insulative layer of a biologically dissolvable material to render the distal portion electrically inactive and a proximal portion having an electrically active surface uncoated with the electrically insulative layer of the biologically dissolvable material such that the proximal portion is electrically active; and wherein subsequent to fixation of the helix into the organ, the helix having a second configuration comprising the distal portion having the electrically active surface exposed upon dissolving of the electrically insulative layer of the biologically dissolvable material to render the distal portion electrically active and the proximal portion having the electrically active surface uncoated with the electrically insulative layer of the biologically dissolvable material such that the proximal portion remains electrically active.