Stapedius reflex electrode and connector

Abstract

A stapedius electrode attaches to or is embedded within the stapedius muscle (,) at a point near where the stapedius muscle is visible as it exits a bony channel (,) within the middle ear. In one embodiment, the electrode is made from a biocompatible metal wire formed into a flat blade (,) having a sharp tip (,) and serrations (,) along one edge. An insulated lead attaches electrically and mechanically to the blade. Such attachment may be made by welding and wrapping the insulated lead at one end of the wire around the body of the electrode and protecting such weld and securing such wrappings with a coating or blob of epoxy. During implantation of the electrode, the electrode blade is inserted through a small slot made in the muscle tissue. Alternatively, the electrode may be inserted alongside the muscle tissue through an opening in the bony wall as it passes through the bony channel, with a tip of the electrode protruding from the bony channel. The protruding tip is then bent over to lie against the bony wall, and hold the electrode in place. Other embodiments of a stapedius electrode are also presented. such as the distal end (,) of a multistrand insulated wire (,) that is embedded in the stapedius muscle tissue (,) using a delivery needle (,). A tube connector (,) may be used to electrically connect a lead coming form the implanted stapedius electrode to an implant device. The tube connector (,) includes a platinum tube (,) welded at one end to a lead (,) coming from the implant device. A proximal end (,) of the lead from the electrode is crimped to the other end of the tube (,). A silicone tube or sleeve (,) is then placed over the tube and sealed at both ends.