Patent ID: 6944507

Claim:
An electrode lead for a medical implant, comprising: an elongated lead body having a proximal end adapted for connection to a medical implant and having a distal end opposite said proximal end; a distal end part located at said distal end, shaped as a truncated first cone and having a larger end; an electrode located at said distal end part and adapted for contact with surrounding tissue; and a fixation structure disposed on said distal end part and adapted for interaction with said tissue for holding said distal end in place relative to said tissue, said fixation structure comprising a helical thread proceeding around said distal end part and having a crest and a height so that said crest is disposed within an imaginary second cone coaxial with said distal end part, and said crest being disposed within an imaginary cylinder that is coaxial with said distal end part and which has a diameter equal to a diameter of said larger end of said distal end part, said cylinder intersecting said imaginary second cone.