Clinical significance of wave I in brainstem auditory evoked potentials during microvascular decompression surgery for hemifacial spasm: a case report

Hemifacial spasm (HFS) is an involuntary contraction of muscles on one side the face. It caused by compression facial nerve blood vessels. Microvascular decompression (MVD) effective treatment for HFS. However, complications such as hearing loss and dizziness may occur due to deficits during surgery. To prevent this, neural monitoring performed with brainstem auditory evoked potentials (BAEPs). In most hospitals, presence or absence BAEPs V waveform used indicator monitoring. Also, it tends be intensively implemented only main procedure. this report, we compare three cases in which there were differences postoperative depending wave I. This suggests importance attention I MVD surgery need acquiring data until closing time well