For the benefits of binaural hearing can be achieved, the integration of information provided by both ears must be integrated and balanced. In clinical practice the results of intraoperative neural telemetry show that there are differences between ears in simultaneous implants. The objective of this study was to analyze the differences in intraoperative neural response between the ears and see if the preoperative residual hearing thresholds influence the neural response telemetry (TNRT). Method: Among 31 patients implanted bilaterally in our group were analyzed twenty-three simultaneously assessments of children implanted with the Nucleus implant â 24RE (Cochlear ä). The data of intra TNRT the electrodes 1, 6, 11, 16 and 22 of both ears were collected and the presence of residual hearing the "best ear". The ear with 'best' residual hearing preoperatively was considered from the mean-tone (500-2kHz) thresholds in free field with hearing aids. We compared the TNRT the 'best' ears with those of the worst ears to observe the influence of residual hearing in TNRT. RESULTS: Of 23 children who participated in this study, 33% had the right ear with better residual hearing ear, left ear 38% and 28% showed no differences in preoperative residues between the ears.