Stevens J C, Webb H D, Smith M F, Buffin J T
Department of Medical Physics and Clinical Engineering, Royal Hallamshire Hospital, Sheffield, UK.
Br J Audiol. 1990 Oct;24(5):293-300. doi: 10.3109/03005369009076569.
Click evoked oto-acoustic emissions (EOAE) at a range of stimulus levels and the auditory brainstem response (ABR) threshold have been measured in 40 infants admitted to a neonatal intensive care unit (NICU). The stimulus levels at which the emissions were first observed had a similar mean value and distribution to those found in previous studies on normal newborns and young adult volunteers. The difference was in the proportion who had no detectable emissions, 16.7% as against 3.9% in the normal newborns and 2.6% in young adult volunteers. The distribution of thresholds for the ABR was again similar to those measured on normal newborns but 8.1% of the ears of the NICU infants had a threshold worse than 53 dBnHL compared with 0% for the normal newborns. A combined screening method starting with the click evoked oto-acoustic emission is proposed. A comparison of the mean ABR thresholds for those in whom an EOAE was recorded to those with no EOAE showed a group effect. The stimulus latency relationship of the NV peak showed too much variation between individual results to consider its use to define accurately the degree of conductive hearing loss.
对40名入住新生儿重症监护病房（NICU）的婴儿，测量了一系列刺激强度下的瞬态诱发耳声发射（EOAE）以及听性脑干反应（ABR）阈值。首次观察到耳声发射的刺激强度，其平均值和分布与先前针对正常新生儿和年轻成人志愿者的研究结果相似。不同之处在于未检测到耳声发射的比例，本研究中该比例为16.7%，而正常新生儿中为3.9%，年轻成人志愿者中为2.6%。NICU婴儿ABR阈值的分布再次与正常新生儿的测量结果相似，但NICU婴儿中有8.1%的耳阈值高于53 dBnHL，而正常新生儿中这一比例为0%。提出了一种从瞬态诱发耳声发射开始的联合筛查方法。对记录到EOAE者与未记录到EOAE者的平均ABR阈值进行比较，显示出分组效应。NV波峰的刺激潜伏期关系在个体结果之间变化太大，无法用其准确界定传导性听力损失的程度。
