Extratympanic electrocochleography with a conductive fluid and flexible electrode

Poor electrical stability of the recording electrode contact is often responsible for unstable recording conditions in extratympanic electrocochleography (ECochG). We present a new method with a large contact area formed by conductive fluid effectively penetrating the non-conductive film of wax and epidermis down to conductive tissue. The need for special cleaning of the external auditory meatus, often involving uncomfortable scratching of the sensitive area close to the tympanic membrane, has been eliminated, reducing the risk of infection and markedly improving the patient's test tolerance. Stable electrical contact improves the recording quality. We discuss a simplified clinical method, a new type of electrode, and patient risk factors as a result of possible accidental electrode movement.