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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
대한이비인후과학회 대한이비인후-두경부외과학회지 대한이비인후과학회지 두경부외과학 제49권 제7호
발행연도
2006.1
수록면
688 - 694 (7page)

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Background and Objectives:The objectives of this study were to achieve the normative measurements of inner ear structures on temporal bone computed tomography (TBCT) and, by using these data, diagnose the malformations of severe to profound sensorineural hearing loss (SNHL) ear accurately. Subjects and Method:For the normative data of the inner ear structures, the TBCT of 60 patients (120 ears) with normal bone-conduction threshold (<15 dB) were used and the data were applied to 570 ears of 285 cochlear implantees with severe to profound SNHL. Six identifiable inner ear structures (cochlea, vestibule, superior semicircular canal, lateral semicircular canal, posterior semicircular canal, and internal auditory canal) were measured in numerically designated areas by picture archiving and communications system. The inner ear anomalies were defined when the structures presented visually obvious malformations or when the measurements deviated 2 standard deviations (SD) from the means in the normative data. Results:We achieved the mean and SD values from the normal bone-conduction group. A total of 293 anomalies were detected in 127 of the 570 (22.3%) profound SNHL ears. An enlarged vestibular aqueduct was the most common individual anomaly (49 cases), followed by vestibular enlargement (38 cases), other semicircular canal dysplasia (37 cases), and shortened cochlea (34 cases). Conclusion:We suggested a measurement technique for the inner ear structures using TBCT and derived normative measurements helpful for diagnosing inner ear anomalies. Quantitative measurements of the cochlea may improve the detection of cochlear hypoplasia and SCC dysplasia from relying on simple visual inspection. (KoreanJ Otolaryngol 2006;49:688-94)

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