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Efficacy of the Disappearance of Lateral Spread Response before and after Microvascular Decompression for Predicting the Long-Term Results of Hemifacial Spasm Over Two Years

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Author(s)
Min-Cheol KangYu-Seok ChoiHak-Ki ChoiSang-Hoon LeeChang-Gu GhangChang-Hyun Kim
Keimyung Author(s)
Kim, Chang Hyun
Department
Dept. of Neurosurgery (신경외과학)
Journal Title
Journal of Korean Neurosurgical Society
Issued Date
2012
Volume
52
Issue
4
Keyword
Clinical outcomeHemifacial spasmLateral spread responseMicrovascular decompression
Abstract
Objective:

The purpose of this large prospective study is to assess the association between the disappearance of the lateral spread response (LSR) before and after microvascular decompression (MVD) and clinical long term results over two years following hemifacial spasm (HFS) treatment.


Methods:

Continuous intra-operative monitoring during MVD was performed in 244 consecutive patients with HFS. Patients with persistent LSR after decompression (n=22, 9.0%), without LSR from the start of the surgery (n=4, 1.7%), and with re-operation (n=15, 6.1%) and follow-up loss (n=4, 1.7%) were excluded. For the statistical analysis, patients were categorized into two groups according to the disappearance of their LSR before or after MVD.


Results:

Intra-operatively, the LSR was checked during facial electromyogram monitoring in 199 (81.5%) of the 244 patients. The mean follow-up duration was 40.9±6.9 months (range 25-51 months) in all the patients. Among them, the LSR disappeared after the decompression (Group A) in 128 (64.3%) patients; but in the remaining 71 (35.6%) patients, the LSR disappeared before the decompression (Group B). In the post-operative follow-up visits over more than one year, there were significant differences between the clinical outcomes of the two groups (p<0.05).


Conclusion:

It was observed that the long-term clinical outcomes of the intra-operative LSR disappearance before and after MVD were correlated. Thus, this factor may be considered a prognostic factor of HFS after MVD.
Keimyung Author(s)(Kor)
김창현
Publisher
School of Medicine
Citation
Min-Cheol Kang et al. (2012). Efficacy of the Disappearance of Lateral Spread Response before and after Microvascular Decompression for Predicting the Long-Term Results of Hemifacial Spasm Over Two Years. Journal of Korean Neurosurgical Society, 52(4), 372–376. doi: 10.3340/jkns.2012.52.4.372
Type
Article
ISSN
2005-3711
DOI
10.3340/jkns.2012.52.4.372
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/34140
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Neurosurgery (신경외과학)
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