Mokrusch T, Schramm J, Hochstetter A
Neurosurgical Clinic, University of Erlangen, West Germany.
Neurosurg Rev. 1988;11(1):33-7. doi: 10.1007/BF01795692.
The configuration of brainstem acoustic evoked potentials (BAEP) is influenced by the type of click stimuli used and may thus affect detectability of abnormalities. In a group of 19 patients with lesions in the posterior fossa BAEP were recorded pre- and intraoperatively. Repeat recordings were performed in each patient in two alternating series with rarefaction and condensation click stimuli. The findings demonstrated that intraoperative potential changes in latency and amplitude were different between the two stimulation modes, but did not vary significantly in their incidence. It was also not possible to predict from the preoperative BAEP which click polarity would demonstrate intraoperative changes more markedly, taking latency and amplitude as parameters. Two conclusions are drawn from this study: None of the two stimulation modes is superior in detecting intraoperative changes and therefore no recommendation can be made which click polarity to use. When working with only one click polarity it is recommended to use occasional control recordings with the other click polarity.
脑干听觉诱发电位（BAEP）的波形受所用短声刺激类型的影响，因此可能会影响异常情况的可检测性。在一组19例后颅窝病变患者中，于术前及术中记录BAEP。对每位患者用疏密交替的短声刺激进行两个交替系列的重复记录。结果表明，两种刺激模式下术中潜伏期和波幅的电位变化不同，但发生率无显著差异。以潜伏期和波幅为参数，也无法根据术前BAEP预测哪种短声极性在术中变化更明显。本研究得出两个结论：两种刺激模式在检测术中变化方面均无优势，因此无法推荐使用哪种短声极性。当仅使用一种短声极性时，建议偶尔用另一种短声极性进行对照记录。
