Intraoperative auditory evoked potential recordings are more reliable at signal detection from different sensor sites on the forehead compared to bispectral index
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- 作者：Yoshiya Ishioka ; Shigekazu Sugino…
- 关键词：Auditory evoked potential ; Intraoperative monitoring ; Bispectral index ; Alternative site ; Nose ; Anesthesia
- 刊名：Journal of Clinical Monitoring and Computing
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：31
- 期：1
- 页码：117-122
- 全文大小：
- 刊物类别：Medicine
- 刊物主题：Anesthesiology; Intensive / Critical Care Medicine; Statistics for Life Sciences, Medicine, Health Sciences;
- 出版者：Springer Netherlands
- ISSN：1573-2614
- 卷排序：31
文摘
Bispectral index (BIS) and auditory evoked potential (AEP) monitoring require the attachment of forehead sensors, posing difficulties when the surgical field involves the forehead. This study analyzed the relationship between BIS values and AEP indices from different sites on the head to establish alternative sensor locations for AEP recording. Thirty patients scheduled for elective surgery under sevoflurane anesthesia were randomly assigned to the forehead, nose or mandible groups (n = 10 patients per group). AEP sensors were placed at the assigned position for each group and BIS sensors were placed on the forehead. BIS value and AEP index were simultaneously recorded from induction until emergence from general anesthesia. Relationships between BIS values and AEP indices were analyzed using a regression method and compared between groups using Pearson’s correlation coefficients. Square regression models better expressed the relationships than linear models in all groups. The z-transformed coefficient in the forehead group was the same as the nose group (p = 0.24) and significantly different in the mandible group (p = 0.0046). These findings suggest that AEPs can be accurately recorded from sensors placed on the nose. Nasal AEP might be useful for monitoring electrical activity in the brain during surgeries involving the forehead.