Abstract:ObjectiveTo evaluate the outcomes and significance of electrical auditory brainstem response (EABR) before cochlear implantation (CI)．MethodsPreoperative EABR was performed in 14 patients underwent CI with different etiology and age． The facial nerve probe connecting with the EMG external electrical stimulator as electrical stimulator, EABR was performed by using the NeruoAudio auditory evoked potentiometer of Neuro Soft company to record EABR waveforms and measure the latencies of all waves and their intervals as well as the amplitude and threshold of Vwave.ResultsThe waveforms of II, III, IV, V by EABR were similar with those by acoustic evoked auditory brainstem responses (AABR), while the latencies of III, V wave by EABR were shorter than those by AABR with the same IIIV interval. Meaningful EABR waves were recorded in all 14 patients. 4 patients without other abnormalities showed welldifferentiated EABR III, IV waves, normal IIIV intervals and Vwave amplitudes, wellrecognized NRT wave forms, which indicated normal auditory pathway and good prognosis. The presence of prolonged latency or poorlydifferentiated waveform or elevated threshold suggested abnormality of auditory pathway.ConclusionsEABR is an objective nerve electrophysiological testing method that accurately predicts the effect of hearing rehabilitation, which is closest to the working state of cochlear. It has great advantage of predicting the surgical outcome of cochlear implantation, especially for some special cases. The research on EABR before CI needs to be further explored.