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lüll Residual hearing preservation after pediatric cochlear implantation Brown RF; Hullar TE; Cadieux JH; Chole RAOtol Neurotol 2010[Oct]; 31 (8): 1221-6OBJECTIVE: This study is designed to test the hypothesis that preservation of residual hearing in a pediatric population is possible using standard electrode arrays with full-length insertions. Surgical technique during implantation also is described. STUDY DESIGN: Retrospective review of patient medical records. SETTING: Academic tertiary care center. PATIENTS: Thirty-one severely to profoundly hearing impaired pediatric patients with some residual hearing precochlear implantation. INTERVENTION: Cochlear implantation using a modified "soft surgery" protocol. MAIN OUTCOME MEASURES: Preimplant and postimplant pure tone thresholds and pure-tone average were calculated from unaided preoperative and postoperative audiograms from 250, 500, and 1,000 Hz. Hearing preservation rates were determined to be complete (loss of =10 dB), moderate (loss of 11-20 dB), marginal (loss of 21-40 dB), or none (loss of >40 dB or no response at the limits of the audiometer). Functional residual hearing rates (defined in this study as at least 1 threshold better than or equal to 75 dB HL for 250, 500, or 1,000 Hz were calculated. RESULTS: Complete hearing preservation was achieved in 14 (45.2%) of 31 patients, whereas 28 (90.3%) of 31 had at least partial hearing preservation (loss of =40 dB). The preoperative to postoperative low-frequency pure-tone average had a mean change of 18.5 dB and median change of 20 dB. Of the patients who had preoperative functional hearing, 9 (50.0%) of 18 maintained functional residual hearing postoperatively for at least 1 pitch. CONCLUSION: Preservation of residual hearing is feasible in pediatric cochlear implant patients using standard-length electrode arrays with full insertions. These data have implications for cochlear implantation in pediatric patients who are at higher risk of progressive hearing loss than adults.|Adolescent[MESH]|Audiometry, Pure-Tone[MESH]|Auditory Threshold/*physiology[MESH]|Child[MESH]|Child, Preschool[MESH]|Cochlear Implantation/methods[MESH]|Cochlear Implants[MESH]|Electrodes, Implanted[MESH]|Female[MESH]|Hearing Loss/*surgery[MESH]|Humans[MESH]|Infant[MESH]|Male[MESH]|Postoperative Period[MESH]|Retrospective Studies[MESH]|Treatment Outcome[MESH]|Young Adult[MESH] |