Patent ID: 8099177

Claim:
A medical implantable lead being adapted to be inserted configured for insertion into a human or animal body and attached, with a distal end, to tissue inside the body, comprising a rotatable helix in the distal end which can be screwed into the tissue, the helix being adapted configured to serve as an attachment of the lead to the tissue as well as to serve as a conductor for conducting of electrical signals to the tissue through electrical conducting surfaces on the helix, the helix being having surfaces that are partly insulated to restrict the conducting of signals between the helix and the tissue to desirable regions, and at least the surfaces of the helix which, in a cross section of the helix, are positioned within lines constituting a normal to a tangent of the inner surface and touching an inner surface of adjacent coils of the helix, being provided with an insulating layer, said helix having external surface with electrically insulated regions and electrically conducting regions, said electrically conducting regions of the external surface of the helix having conducting structures as well as insulated surfaces arranged in an electrically conducting pattern wherein said electrically surfaces are formed as electrically conducting protrusions that project from said insulated surfaces.