CHEN Jun,WANG Jingbo,PENG Jianhua, et al. The study of bone conduction auditory brainstem responses in infants with normal hearing [J]. JOURNAL OF WEZHOU MEDICAL UNIVERSITY, 2015, 45(8): 588-.
Abstract：Objective: To study the characteristics of wave forms of the bone-conduction click-evoked auditory brainstem responses in 0～2 years old infants with normal hearing and to evaluate initially the value of its application in clinic. Methods: Air-and bone-conduction click-evoked ABRS in 24 cases of 0-2 years old infants (0-1 years, 1-2 years every 12 cases, 36 ears) with normal hearing were performed. The data were statistically analyzed with SPSS17.0. Results: The wave forms of bone-conduction ABR were almost the same as those of air-conduction at the thresholds or above. The detection rates of wave I, III and V were 29.2%, 46.7% and 100%, respectively at 35 dBnHL. The thresholds to bone-conducted ABR were (15.00±5.48) dBnHL, with the latencies of wave V were (8.32±0.54) ms. There were significant differences between ages for the thresholds and the wave V latencies (P<0.05), for aged 0-1 years infants, the thresholds to bone-conducted ABR were higher than that aged 1-2 years infants, and the wave V latencies were prolonged than aged 1-2 years groups. There were no significant differences between male and female for the thresholds and the wave V latencies. The bone-conducted wave V latency-intensity functions exhibited increased latencies as intensity decreased. Conclusion: The bone-conduction ABR is a valuable and effective method in children’s hearing test with special values in newborn hearing screening, more information on ascertaining the presence and magnitude of a conductive hearing loss can be obtained when both air and bone-conducted ABR wave V latency-intensity functions are administered.
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