Reroń E, Sekuła J, Borkowski W
Kliniki Otolaryngologicznej AM w Krakowie.
Otolaryngol Pol. 1991;45(3):218-24.
Auditory Brainstem Responses (ABR) and behavioural threshold were studied in 52 infants born between 28-41 weeks of gestational age (GA), which have been between 33-42 weeks of postconceptional age (PCA) (Gestational age + postnatal age). Peak latencies of wave V and interpeak latency I-V were measured as a function of maturational changes and stimulus intensities. Behavioural audiometric threshold to pure tone were determined through behavioural observation of auditory-palpebral reflex. In the group of full-term infants threshold responses for clicks lay between 32.5 to 35.1 dB. In the group of pre-term neonates the threshold lay between 37.6 do 40 dB. Behavioural audiometry disclosed that full-term infants responded to pure tone stimuli with mean threshold of 86 dB, while the pre-term infants would respond to pure stimuli at 91 dB. The latency of wave V responses decreases progressively from a mean of 7.84 ms at 33-35 weeks of PCA, to 6.57 ms at 40-41 weeks of PCA. The ABR shows a remarkable variability in wave V latency with relatively stable interpeak latency I-V with decreases stimulus intensities.
对52名孕龄在28 - 41周（GA）、孕后年龄在33 - 42周（PCA，孕龄 + 出生后年龄）的婴儿进行了听觉脑干反应（ABR）和行为阈值研究。测量了V波的峰潜伏期和I - V峰间潜伏期，作为成熟变化和刺激强度的函数。通过对听觉 - 睑反射的行为观察确定纯音的行为听力阈值。在足月儿组中，对咔嗒声的阈值反应在32.5至35.1分贝之间。在早产儿组中，阈值在37.6至40分贝之间。行为听力测定显示，足月儿对纯音刺激的平均阈值为86分贝时作出反应，而早产儿在91分贝时对纯刺激作出反应。V波反应的潜伏期从PCA 33 - 35周时的平均7.84毫秒逐渐减少到PCA 40 - 41周时的6.57毫秒。ABR显示V波潜伏期有显著变化，I - V峰间潜伏期相对稳定，随着刺激强度降低。
