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Journal of the Korean Academy of Rehabilitation Medicine 1995;19(2):14.
Significance of Intraoperative Electrophysiologic Monitoring and Follow-up Results after Microvascular Decompression of Hemifacial Spasm
신지철, 장익환, 오현일, 정의화*, 이영희** Ji Cheol Shin, M.D., Ik Hwan Jang, M.D., Hyeon Il Oh, M.D., Ui Wha Chung, M.D.* and Young Hee Lee, M.D.**
Department of Rehabilitation Medicine, Neurosurgery*, Dong Rae Bong Seng Hospital, Department of Rehabilitation Medicine, Wonju College of Medicine, Yonsei University**

Department of Rehabilitation Medicine, Aju University College of Medicine*

편측 안면 경련의 미세혈관 감압술시 수술중 감시의 의의와 추적관찰시의 변화
동래 봉생병원 재활의학과, 신경외과* 및 연세대학교 원주의과대학 재활의학교실**

For evaluating the significance of intraoperative electrophysiologic monitoring and observing the change of clinical and electrophysiologic results after Microvascular Decompression(MVD), we did follow-up 227 cases with hemifacial spasm, who had been operated at Bong Seng Memorial Hospital and Dong Rae Bong Seng Hospital, for more than 2 months. For comparing, we divided patients into Monitoring group(n=134) and Non-monitoring group(n=93). The success rate of MVD was 89.5% at POD 7 and 92.3% at follow-up, respectvely, and there was no statistical difference between Monitoring and Nonmonitoring group. But the distribution of offenders was only statistically different from each other. During follow-up, the clinical results changed at 59 cases of 142(41.5%), and hemifacial spasm in 32 cases gradually disappeared. In the 57 cases, which were able to test follow-up electrophysiologic study, 73.7% electrophysiologically changed, and the ratio of completely disappeared Abnormal Muscle Response was statistically increased from 35.1% at POD 7 to 70.2% at follow-up study. In the 85 cases, which were able to followup at Monitoring group, the results of electrophysiologic study at POD 7 were statistically correlated with clinical results at follow-up.

According to the above results, electrophysiologic study is helpful for identifying the offenders and determining the adequacy of vascular decompression, clinical and electrophysiologic status of hemifacial spasm after MVD has continuously changed, and the results of electrophysiologic study at POD 7 are useful for predicting the clinical results at follow-up.

Key Words: Hemifacial Spasm, Electrophysiologic study, Postoperative change


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