Center for Pediatric Studies, Campinas State University, Brazil.
Braz J Otorhinolaryngol. 2010 Nov-Dec;76(6):729-38. doi: 10.1590/S1808-86942010000600011.
Auditory Brainstem Response (ABR) is important for the early diagnosis of hearing impairment in infants.
To compare ABR responses in full-term and premature infants; gender and ear were taken into account.
A cross-sectional prospective cohort study was carried out. We evaluated 36 full-term and 30 premature infants that had passed the Transient Otoacoustic Emissions test, had type A tympanometric curves, and had no risk factor for hearing loss besides prematurity. The evaluations were done from the time of hospital discharge to the third month of life, and consisted of a clinical history, acoustic immittance testing and ABR evaluation.
The comparison of absolute and interpeak wave I, III and V latencies in right and left ears revealed a statistically significant difference at the interpeak I-III. There was no significant gender differences in the comparison of results. Significant difference in wave I, III and V absolute latencies at 80 dB and in wave V at 60 db and 20 db were observed in a comparison of absolute and interpeak latencies between full-term and premature infants. An inverse correlation was found between age and absolute latencies.
The maturity of the auditory system influences ABR responses in infants. To avoid misinterpretation of results, gestational age must be taken into account in the analysis of ABR in pediatric population.
听觉脑干反应（ABR）对于婴儿听力损伤的早期诊断很重要。
比较足月和早产儿的 ABR 反应；考虑了性别和耳朵。
进行了一项横断面前瞻性队列研究。我们评估了 36 名足月和 30 名早产儿，这些婴儿均通过瞬态耳声发射测试，具有 A 型鼓室图，并且除早产儿外没有听力损失的危险因素。评估从出院到生命的第三个月进行，包括临床病史、声导抗测试和 ABR 评估。
右耳和左耳的绝对和峰间波 I、III 和 V 潜伏期的比较显示，在峰间 I-III 处存在统计学上的显著差异。在结果比较中，性别之间没有显著差异。在足月和早产儿的绝对和峰间潜伏期比较中，观察到 80dB 时波 I、III 和 V 的绝对潜伏期和 60dB 和 20dB 时波 V 的绝对潜伏期和峰间潜伏期存在显著差异。年龄与绝对潜伏期之间存在负相关。
听觉系统的成熟度会影响婴儿的 ABR 反应。为了避免对结果的误解，在儿科人群的 ABR 分析中必须考虑胎龄。
