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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
대한이비인후과학회 대한이비인후-두경부외과학회지 대한이비인후과학회지 두경부외과학 제49권 제9호
발행연도
2006.1
수록면
892 - 896 (5page)

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Background and Objectives:Neural response telemetry (NRT) has been used as one of the most useful tools to measureneural responses ranging from spiral ganglion cells to electrical stimulation via the Nucleus 24 cochlear implant. The purpose ofthis study was to assess and analyze the result of NRT measured intraopertively and apply the result in postoperative mapping.Subjects and Method:The NRT test was administered to 72 patients (49 children and 23 adults) with the Nucleus 24 cochlearimplant. After inserting of the electrode array into the scala tympani, an impedance test was administered to check the integrityof each inserted electrode. In cases of partial insertion, the electrodes outside the cochlear were excluded along with thoseproven to be short circuited. The electrically evoked action potential (EAP) was recorded using version 3.0 of NRT software.One intra-cochlear electrode (electrode 2, 4, 6, 8, 10, 12, 14, 16) with MP1 as reference was chosen for the stimulating pair. Therecording electrode was located 3 electrodes away apically from the stimulating intracochlear electrode and referenced to MP2.The amplifier gain and sampling delay were optimized for each subject using electrode 4 and these same parameters were usedthroughout the test. Results:Out of 72 implantees, 56 patients (78%) were observed to produce reliable responses:16 (70%)of 23 adults and 40 (82%) of 49 children responded. The patients who failed to produce NRT response had higher T levels thanpatients who had NRT response. Conclusion:Eighty percent of the implantees without any inner ear anomaly showed reliableresponse to intraopertive NRT measurement. The intra-operarative NRT data may be used to predict electrical stimulation levelsin programming. (Korean J Otolaryngol 2006;49:892-6)

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