A prewarning sign for hearing loss by brainstem auditory evoked potentials during microvascular decompression surgery for hemifacial spasm
- Authors
- Park, Sang-Ku; Joo, Byung-Euk; Kwon, John; Kim, Minsoo; Lee, Seunghoon; Lee, Jeong-A; Park, Kwan
- Issue Date
- Feb-2021
- Publisher
- Elsevier BV
- Keywords
- Brainstem auditory evoked potentials; Hemifacial spasm; Microvascular decompression; Postoperative hearing loss
- Citation
- Clinical Neurophysiology, v.132, no.2, pp 358 - 364
- Pages
- 7
- Journal Title
- Clinical Neurophysiology
- Volume
- 132
- Number
- 2
- Start Page
- 358
- End Page
- 364
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/2058
- DOI
- 10.1016/j.clinph.2020.10.027
- ISSN
- 1388-2457
1872-8952
- Abstract
- Objective: We aimed to define the prewarning sign of brainstem auditory evoked potentials (BAEPs) associated with cerebellar retraction (CR) during microvascular decompression surgery for hemifacial spasm. Methods: A total of 241 patients with a latency prolongation of 1 ms or an amplitude decrement of 50% of wave V were analyzed. According to BAEPs before significant changes during CR, patients were classified into Groups A (latency prolongation of wave I [>= 0.5 ms] without prolongation of the I-III interpeak interval [<0.5 ms]) and B (no latency prolongation of wave I [<0.5 ms] with prolongation of the I-III interpeak interval [>= 0.5 ms]). BAEPs and postoperative hearing loss (HL) were compared between the two groups. Results: Group B comprised 160 (66.4%) patients. With maximal changes in wave V, latency prolongation (>= 1 ms) with amplitude decrement (>= 50%) was more common in Group B (p < 0.018). At the end of the operation, wave V loss was observed in 11 patients, including 10 patients from Group B. Five patients developed postoperative HL; all were from Group B. Conclusions: Latency prolongation of wave III during CR was associated with serious BAEPs changes and postoperative HL. Significance: Latency prolongation of wave III is a significant prewarning sign. (C) 2020 International Federation of Clinical Neurophysiology. Published by Elsevier B.V. All rights reserved.
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