Discovery of a new waveform for intraoperative monitoring of hemifacial spasms

Acta neurochirurgica
Xue-Sheng ZhengShi-Ting Li

Abstract

Surgeons often rely on intraoperative electrophysiological monitoring to determine whether decompression is sufficient during microvascular decompression surgery for hemifacial spasms. A new monitoring method is needed when an abnormal muscle response is occasionally not available or is unreliable. This study was an observational clinical trial exploring a new waveform recorded from the facial muscles while the offending artery wall was electrically stimulated. Thirty-two patients with typical hemifacial spasm and 12 with trigeminal neuralgia as a control were included. The facial muscle response was recorded during microvascular decompression surgery while the offending artery wall was stimulated (2 mA × 0.2 ms). The latency, amplitude, and effective refractory period were analyzed. A waveform was recorded from the facial muscles of patients with hemifacial spasm when the offending artery wall was stimulated and was named the "Z-L response." The latency was 7.3 ± 0.8 ms, the amplitude was 0.08 ± 0.02 mV, and the effective refractory period was 3.5-4 ms. The Z-L response disappeared immediately after microvascular decompression. No waveform was recorded from the facial muscles of patients with trigeminal neuralgia while the ant...Continue Reading

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Citations

Jun 12, 2013·Neurosurgical Review·Xuhui WangMichael Horowitz
Jan 29, 2013·Acta neurochirurgica·Yi LiShiting Li
Jan 23, 2013·Neurological Research·Xinyuan LiShiting Li
Jul 19, 2014·Neurological Research·Ning-Ning DouShi-Ting Li
Jun 6, 2012·Neurological Research·Qiu-Meng ZhouShi-Ting Li
Jul 11, 2019·Journal of Korean Neurosurgical Society·Sang-Ku ParkKwan Park
Jul 10, 2014·The Journal of Craniofacial Surgery·Jin ZhuShi-Ting Li
Jul 28, 2017·The Journal of Craniofacial Surgery·Xin ZhangShiting Li
Nov 16, 2021·Journal of Neurological Surgery. Part A, Central European Neurosurgery·Yun-Fei XiaHua Zhao

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