Eswaran H, Wilson J D, Lowery C L, Sharp G, Hawk R M, Murphy P, Pennington S
Department of Applied Science, University of Arkansas at Little Rock, University of Arkansas for Medical Sciences, Little Rock, Arkansas, USA.
Am J Obstet Gynecol. 1999 Jun;180(6 Pt 1):1422-6. doi: 10.1016/s0002-9378(99)70029-3.
The aim of this study was to record, during labor, the brain stem auditory evoked potentials of the fetus from standard fetal scalp electrodes.
A personal computer-based instrument was developed to record, during labor, brain stem auditory evoked potentials from 10 fetuses ranging in gestational age from 36 to >/=40 weeks. Auditory stimulus was provided by clicks (16/s) delivered on the mother's abdomen with an intensity of 120 dB. The evoked potential signals were digitized and averaged. Interfering artifacts were excluded from the averages.
In 80% of the subjects, all the principal waveforms of the brain stem auditory evoked potentials-waves I, III, and V-were clearly identifiable. The latency for wave I ranged from 1.2 to 2.2 ms, wave III from 3.4 to 5.6 ms, and wave V from 5.8 to 8.4 ms. The morphologic features of the waveform and the interwave latency values were similar to those of normal term infants recorded in the past studies.
We have reestablished that it is possible to record auditory evoked potentials during labor from fetal scalp electrodes. Brain stem auditory evoked potentials may be a useful screening tool for at least the severely neurologically damaged fetus.
本研究旨在在分娩过程中，通过标准胎儿头皮电极记录胎儿的脑干听觉诱发电位。
开发了一种基于个人计算机的仪器，用于在分娩过程中记录10例胎龄为36至≥40周胎儿的脑干听觉诱发电位。听觉刺激由以120分贝强度在母亲腹部发出的滴答声（每秒16次）提供。诱发电位信号被数字化并进行平均。平均过程中排除干扰伪迹。
在80%的受试者中，脑干听觉诱发电位的所有主要波形——波I、波III和波V——都清晰可辨。波I的潜伏期为1.2至2.2毫秒，波III为3.4至5.6毫秒，波V为5.8至8.4毫秒。波形的形态特征和波间潜伏期值与过去研究中记录的足月正常婴儿相似。
我们再次证实，在分娩过程中通过胎儿头皮电极记录听觉诱发电位是可行的。脑干听觉诱发电位可能至少对严重神经损伤胎儿是一种有用的筛查工具。
