NICU入院児のABR異常発生率の検討:Risk factorとの関係

概要

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Auditory brainstem responses were recorded in 67 high risk infants in the neonatal intensive care unit of Nara Medical University Hospital to determine initial failure rate and to evaluate risk factors. The latencies of wave I, III, V, the I-V interpeak latency (I-V IPL)and threshold were measured. Recordings were abnormal difined prolongation of the latencies over 1 SD of those of the normal infants and threshold over 50 dBnHL.<BR>Of our NICU population,16.4% showed prolongation of wave I, I II or V,15.6% showed prolongation of I-V IPL,23.9% showed elevation of threshold. Risk factor evaluation revealed a high (22.7-57.1%) incidence of ABR abnormalities in subgroups with risk such as with severe infections, congenital anomalies or congenital metabolic diseases. Subgroups with risk such as low birth weight, respiratory disturbance, with hyperbilirubinemia or with intracranial hemorrhage showed a relatively low (0-25.0%) incidence of ABR abnormalities.
耳鼻咽喉科臨床学会の論文