Injectable Electrode with Helical Wire Structure and Methods for Minimally Invasive Anchoring and Removal

An injectable electrode comprising a helical wire structure configured for full and chronic implantation on or near a tissue target in a body for conduction of energy to or from said tissue target, said helical wire structure comprising at least one wire rope comprising a plurality of strands of biocompatible and conductive wire, said helical wire structure enclosing a hollow core within an inner diameter and having a longitudinal axis, an outer diameter and two ends, said helical wire structure having flexibility for self-bending in any direction up to 180 degrees on said longitudinal axis, and being configured for loading into a dispenser capable of creating an insertion channel to the tissue target, and at least a portion of said helical wire structure being capable of self-forming a bunching anchor wider than said insertion channel when injected while said dispenser is substantially stationary, so that said bunching anchor is capable of self-anchoring said electrode in place.