A simplified technique for transtympanic electrocochleography

Recently, electrocochleography (ECochG) has enjoyed a resurgence in clinical use, particularly in the preoperative and intraoperative evaluation of Meniere's disease patients. With a transtympanic electrode, large amplitude, repeatable waveforms can be easily recorded. Despite this fact, transtympanic ECochG has not been widely adopted in the United States, primarily because of the technical difficulties in securing the electrode and then delivering a stimulus. We have developed a simplified transtympanic electrode placement, using a standard subdermal needle held in place by a foam plug earphone. The foam plug earphone not only secures the electrode, but also delivers the stimulus. We have used this technique in a series of cases, both intraoperatively as well as in the outpatient clinic. The advantages of this approach are discussed and illustrated with individual and group data.