Reference electrodes for inner ear stimulation devices

摘要

A reference electrode for an inner ear stimulation device is disclosed. The reference electrode is to be implanted and includes a protruding conductor portion and an insulated conducting portion connected to a lead for connection to the device. The protruding conductor portion is shaped so as to present a generally smooth surface without any substantial projections to impede removal in the event that the electrode is withdrawn in the direction of the lead. The smooth profile and lack of an undercut assist in preventing biofilm accumulation and growth. This reduces the risk of post-surgical complications such as infection.

主权项

1. A reference electrode for an inner ear stimulation device, the electrode including:
a protruding uninsulated first conductor portion; and an insulated second conducting portion connected to or forming a lead for connection of the protruding uninsulated first conductor portion to the inner ear stimulation device; wherein the protruding uninsulated first conductor portion is shaped so as to present a generally smooth surface without any substantial projections to impede removal in the event that the electrode is withdrawn in the direction of the lead; wherein the protruding uninsulated first conductor portion has a proximal end portion and a distal end portion; and wherein the distal end portion has a width less than 10% of the width of the proximal end portion, the width of the distal end being no less than substantially equal to the width of the proximal end.